/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:50:28,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:50:28,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:50:28,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:50:28,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 19:50:28,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 19:50:28,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 19:50:28,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 19:50:28,539 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:50:28,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:50:28,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:50:28,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:50:28,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:50:28,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:50:28,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:50:28,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:50:28,541 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:50:28,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:50:28,541 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:50:28,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:50:28,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:50:28,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:50:28,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:50:28,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:50:28,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:50:28,542 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:50:28,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:50:28,542 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:50:28,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:50:28,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:50:28,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:50:28,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:50:28,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:50:28,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:50:28,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:50:28,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:50:28,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:50:28,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:50:28,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:50:28,544 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:50:28,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:50:28,544 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:50:28,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:50:28,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:50:28,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:50:28,742 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:50:28,743 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:50:28,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum.wvr.bpl [2022-03-03 19:50:28,744 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum.wvr.bpl' [2022-03-03 19:50:28,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:50:28,766 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:50:28,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:50:28,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:50:28,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:50:28,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:28" (1/1) ... [2022-03-03 19:50:28,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:28" (1/1) ... [2022-03-03 19:50:28,799 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:50:28,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:50:28,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:50:28,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:50:28,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:50:28,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:28" (1/1) ... [2022-03-03 19:50:28,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:28" (1/1) ... [2022-03-03 19:50:28,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:28" (1/1) ... [2022-03-03 19:50:28,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:28" (1/1) ... [2022-03-03 19:50:28,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:28" (1/1) ... [2022-03-03 19:50:28,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:28" (1/1) ... [2022-03-03 19:50:28,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:28" (1/1) ... [2022-03-03 19:50:28,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:50:28,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:50:28,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:50:28,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:50:28,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:28" (1/1) ... [2022-03-03 19:50:28,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:50:28,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:28,838 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) [2022-03-03 19:50:28,862 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 [2022-03-03 19:50:28,876 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:50:28,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:50:28,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:50:28,877 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:50:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:50:28,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:50:28,877 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:50:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:50:28,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:50:28,877 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:50:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:50:28,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:50:28,878 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:50:28,915 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:50:28,916 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:50:29,014 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:50:29,021 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:50:29,021 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:50:29,023 INFO L202 PluginConnector]: Adding new model array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:50:29 BoogieIcfgContainer [2022-03-03 19:50:29,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:50:29,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:50:29,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:50:29,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:50:29,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:28" (1/2) ... [2022-03-03 19:50:29,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463a7193 and model type array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:50:29, skipping insertion in model container [2022-03-03 19:50:29,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:50:29" (2/2) ... [2022-03-03 19:50:29,060 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum.wvr.bpl [2022-03-03 19:50:29,063 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:50:29,064 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:50:29,064 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:50:29,064 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:50:29,105 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 19:50:29,154 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:50:29,160 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:50:29,160 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 19:50:29,167 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2022-03-03 19:50:29,211 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:29,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:50:29,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:29,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:29,225 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:29,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:29,229 INFO L85 PathProgramCache]: Analyzing trace with hash 148747361, now seen corresponding path program 1 times [2022-03-03 19:50:29,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:29,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741968619] [2022-03-03 19:50:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:29,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:29,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:29,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741968619] [2022-03-03 19:50:29,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741968619] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:50:29,372 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:50:29,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:50:29,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983009510] [2022-03-03 19:50:29,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:50:29,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:50:29,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:29,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:50:29,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:50:29,402 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-03-03 19:50:29,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:29,461 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2022-03-03 19:50:29,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:50:29,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 19:50:29,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:29,477 INFO L225 Difference]: With dead ends: 298 [2022-03-03 19:50:29,477 INFO L226 Difference]: Without dead ends: 283 [2022-03-03 19:50:29,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:50:29,481 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:29,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:50:29,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-03 19:50:29,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2022-03-03 19:50:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:29,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2022-03-03 19:50:29,575 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2022-03-03 19:50:29,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:29,576 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2022-03-03 19:50:29,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-03-03 19:50:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2022-03-03 19:50:29,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:50:29,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:29,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:29,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:50:29,579 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:29,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:29,580 INFO L85 PathProgramCache]: Analyzing trace with hash 191403910, now seen corresponding path program 1 times [2022-03-03 19:50:29,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:29,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138047372] [2022-03-03 19:50:29,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:29,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:29,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:29,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138047372] [2022-03-03 19:50:29,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138047372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:50:29,650 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:50:29,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:50:29,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498861290] [2022-03-03 19:50:29,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:50:29,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:50:29,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:29,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:50:29,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:50:29,652 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:29,702 INFO L93 Difference]: Finished difference Result 249 states and 716 transitions. [2022-03-03 19:50:29,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:50:29,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:50:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:29,706 INFO L225 Difference]: With dead ends: 249 [2022-03-03 19:50:29,706 INFO L226 Difference]: Without dead ends: 249 [2022-03-03 19:50:29,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:50:29,707 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:29,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:50:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-03 19:50:29,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2022-03-03 19:50:29,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.89237668161435) internal successors, (645), 223 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:29,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 645 transitions. [2022-03-03 19:50:29,727 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 645 transitions. Word has length 21 [2022-03-03 19:50:29,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:29,728 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 645 transitions. [2022-03-03 19:50:29,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 645 transitions. [2022-03-03 19:50:29,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:50:29,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:29,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:29,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 19:50:29,731 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:29,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:29,731 INFO L85 PathProgramCache]: Analyzing trace with hash 364622328, now seen corresponding path program 1 times [2022-03-03 19:50:29,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:29,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519173923] [2022-03-03 19:50:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:29,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:29,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:29,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519173923] [2022-03-03 19:50:29,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519173923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:50:29,780 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:50:29,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:50:29,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234784716] [2022-03-03 19:50:29,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:50:29,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:50:29,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:29,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:50:29,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:50:29,782 INFO L87 Difference]: Start difference. First operand 224 states and 645 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:29,832 INFO L93 Difference]: Finished difference Result 332 states and 966 transitions. [2022-03-03 19:50:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:50:29,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:50:29,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:29,835 INFO L225 Difference]: With dead ends: 332 [2022-03-03 19:50:29,835 INFO L226 Difference]: Without dead ends: 332 [2022-03-03 19:50:29,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:50:29,837 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:29,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:50:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-03 19:50:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 260. [2022-03-03 19:50:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.9034749034749034) internal successors, (752), 259 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 752 transitions. [2022-03-03 19:50:29,856 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 752 transitions. Word has length 21 [2022-03-03 19:50:29,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:29,856 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 752 transitions. [2022-03-03 19:50:29,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 752 transitions. [2022-03-03 19:50:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:50:29,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:29,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:29,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:50:29,859 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:29,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:29,859 INFO L85 PathProgramCache]: Analyzing trace with hash -164446029, now seen corresponding path program 1 times [2022-03-03 19:50:29,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:29,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408818615] [2022-03-03 19:50:29,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:29,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:30,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:30,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408818615] [2022-03-03 19:50:30,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408818615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:30,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130146822] [2022-03-03 19:50:30,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:30,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:30,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:30,304 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) [2022-03-03 19:50:30,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:50:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:30,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:50:30,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:30,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-03-03 19:50:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:30,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:30,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:30,943 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 17 treesize of output 22 [2022-03-03 19:50:30,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:30,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-03-03 19:50:30,998 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-03 19:50:31,001 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-03 19:50:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:31,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130146822] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:31,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:31,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-03 19:50:31,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756596089] [2022-03-03 19:50:31,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:31,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:50:31,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:31,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:50:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:50:31,097 INFO L87 Difference]: Start difference. First operand 260 states and 752 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:31,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:31,595 INFO L93 Difference]: Finished difference Result 535 states and 1542 transitions. [2022-03-03 19:50:31,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:50:31,596 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:50:31,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:31,600 INFO L225 Difference]: With dead ends: 535 [2022-03-03 19:50:31,600 INFO L226 Difference]: Without dead ends: 520 [2022-03-03 19:50:31,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:50:31,601 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 252 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:31,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 99 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:50:31,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-03 19:50:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 346. [2022-03-03 19:50:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.8956521739130436) internal successors, (999), 345 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 999 transitions. [2022-03-03 19:50:31,630 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 999 transitions. Word has length 24 [2022-03-03 19:50:31,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:31,630 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 999 transitions. [2022-03-03 19:50:31,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:31,630 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 999 transitions. [2022-03-03 19:50:31,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:50:31,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:31,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:31,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:31,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:31,846 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:31,847 INFO L85 PathProgramCache]: Analyzing trace with hash -463670379, now seen corresponding path program 2 times [2022-03-03 19:50:31,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:31,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423485987] [2022-03-03 19:50:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:31,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:32,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:32,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423485987] [2022-03-03 19:50:32,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423485987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:32,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737843503] [2022-03-03 19:50:32,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:50:32,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:32,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:32,184 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) [2022-03-03 19:50:32,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:50:32,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:50:32,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:32,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:50:32,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:32,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:32,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 73 [2022-03-03 19:50:32,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:32,516 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 20 treesize of output 25 [2022-03-03 19:50:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:32,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:32,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:32,822 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 17 treesize of output 22 [2022-03-03 19:50:32,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:32,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-03-03 19:50:32,856 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-03 19:50:32,866 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-03 19:50:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:32,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737843503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:32,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:32,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-03 19:50:32,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212942575] [2022-03-03 19:50:32,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:32,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:50:32,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:50:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:50:32,986 INFO L87 Difference]: Start difference. First operand 346 states and 999 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2022-03-03 19:50:34,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:34,968 INFO L93 Difference]: Finished difference Result 1430 states and 4135 transitions. [2022-03-03 19:50:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 19:50:34,968 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) Word has length 24 [2022-03-03 19:50:34,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:34,976 INFO L225 Difference]: With dead ends: 1430 [2022-03-03 19:50:34,976 INFO L226 Difference]: Without dead ends: 1400 [2022-03-03 19:50:34,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=647, Invalid=2215, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:50:34,978 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 609 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:34,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 191 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:50:34,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-03-03 19:50:34,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 473. [2022-03-03 19:50:34,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.9661016949152543) internal successors, (1400), 472 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1400 transitions. [2022-03-03 19:50:34,999 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1400 transitions. Word has length 24 [2022-03-03 19:50:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:35,000 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1400 transitions. [2022-03-03 19:50:35,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2022-03-03 19:50:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1400 transitions. [2022-03-03 19:50:35,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:50:35,001 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:35,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:35,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:35,211 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 [2022-03-03 19:50:35,211 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:35,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:35,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1613103477, now seen corresponding path program 3 times [2022-03-03 19:50:35,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:35,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994798276] [2022-03-03 19:50:35,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:35,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:35,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:35,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994798276] [2022-03-03 19:50:35,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994798276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:35,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877860094] [2022-03-03 19:50:35,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:50:35,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:35,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:35,472 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) [2022-03-03 19:50:35,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:50:35,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:50:35,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:35,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:50:35,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:35,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-03-03 19:50:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:35,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:35,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:35,825 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 17 treesize of output 22 [2022-03-03 19:50:35,831 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:35,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-03-03 19:50:35,858 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-03 19:50:35,861 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-03 19:50:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:35,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877860094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:35,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:35,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-03 19:50:35,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778448619] [2022-03-03 19:50:35,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:35,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:50:35,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:35,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:50:35,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:50:35,996 INFO L87 Difference]: Start difference. First operand 473 states and 1400 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:36,477 INFO L93 Difference]: Finished difference Result 745 states and 2174 transitions. [2022-03-03 19:50:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:50:36,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:50:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:36,482 INFO L225 Difference]: With dead ends: 745 [2022-03-03 19:50:36,482 INFO L226 Difference]: Without dead ends: 730 [2022-03-03 19:50:36,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:50:36,483 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:36,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 148 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:50:36,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-03-03 19:50:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 489. [2022-03-03 19:50:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.9508196721311477) internal successors, (1440), 488 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1440 transitions. [2022-03-03 19:50:36,501 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1440 transitions. Word has length 24 [2022-03-03 19:50:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:36,501 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1440 transitions. [2022-03-03 19:50:36,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:36,502 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1440 transitions. [2022-03-03 19:50:36,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:50:36,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:36,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:36,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:36,725 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 [2022-03-03 19:50:36,725 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:36,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:36,726 INFO L85 PathProgramCache]: Analyzing trace with hash -882860491, now seen corresponding path program 4 times [2022-03-03 19:50:36,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:36,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703937735] [2022-03-03 19:50:36,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:36,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:36,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:36,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703937735] [2022-03-03 19:50:36,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703937735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:36,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450627730] [2022-03-03 19:50:36,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:50:36,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:36,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:36,986 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) [2022-03-03 19:50:36,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:50:37,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:50:37,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:37,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:50:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:37,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:37,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-03 19:50:37,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:37,185 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 20 treesize of output 25 [2022-03-03 19:50:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:37,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:37,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:37,436 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 17 treesize of output 22 [2022-03-03 19:50:37,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:37,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-03-03 19:50:37,476 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-03 19:50:37,480 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-03 19:50:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:37,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450627730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:37,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:37,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-03 19:50:37,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161894983] [2022-03-03 19:50:37,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:37,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:50:37,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:37,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:50:37,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:50:37,599 INFO L87 Difference]: Start difference. First operand 489 states and 1440 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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) [2022-03-03 19:50:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:37,982 INFO L93 Difference]: Finished difference Result 785 states and 2319 transitions. [2022-03-03 19:50:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:50:37,983 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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) Word has length 24 [2022-03-03 19:50:37,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:37,987 INFO L225 Difference]: With dead ends: 785 [2022-03-03 19:50:37,987 INFO L226 Difference]: Without dead ends: 770 [2022-03-03 19:50:37,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:50:37,989 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 193 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:37,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 152 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 313 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-03-03 19:50:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-03 19:50:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 504. [2022-03-03 19:50:38,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.9761431411530817) internal successors, (1497), 503 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:38,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1497 transitions. [2022-03-03 19:50:38,005 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1497 transitions. Word has length 24 [2022-03-03 19:50:38,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:38,005 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1497 transitions. [2022-03-03 19:50:38,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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) [2022-03-03 19:50:38,005 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1497 transitions. [2022-03-03 19:50:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:50:38,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:38,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:38,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:38,219 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 [2022-03-03 19:50:38,219 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:38,220 INFO L85 PathProgramCache]: Analyzing trace with hash -207846031, now seen corresponding path program 5 times [2022-03-03 19:50:38,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:38,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831307761] [2022-03-03 19:50:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:38,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:38,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:38,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831307761] [2022-03-03 19:50:38,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831307761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:38,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440899114] [2022-03-03 19:50:38,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:50:38,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:38,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:38,434 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) [2022-03-03 19:50:38,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:50:38,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:50:38,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:38,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:50:38,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:38,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:38,640 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 21 treesize of output 25 [2022-03-03 19:50:38,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:38,646 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 31 [2022-03-03 19:50:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:38,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:39,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:39,063 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 17 treesize of output 22 [2022-03-03 19:50:39,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:39,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-03-03 19:50:39,094 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-03 19:50:39,097 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-03 19:50:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:39,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440899114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:39,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:39,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 23 [2022-03-03 19:50:39,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853099896] [2022-03-03 19:50:39,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:39,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:50:39,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:39,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:50:39,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:50:39,229 INFO L87 Difference]: Start difference. First operand 504 states and 1497 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:44,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:44,003 INFO L93 Difference]: Finished difference Result 1743 states and 5052 transitions. [2022-03-03 19:50:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-03 19:50:44,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:50:44,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:44,012 INFO L225 Difference]: With dead ends: 1743 [2022-03-03 19:50:44,012 INFO L226 Difference]: Without dead ends: 1698 [2022-03-03 19:50:44,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2413, Invalid=8929, Unknown=0, NotChecked=0, Total=11342 [2022-03-03 19:50:44,015 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 450 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:44,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 352 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1461 Invalid, 0 Unknown, 312 Unchecked, 1.0s Time] [2022-03-03 19:50:44,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2022-03-03 19:50:44,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 537. [2022-03-03 19:50:44,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.0167910447761193) internal successors, (1617), 536 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1617 transitions. [2022-03-03 19:50:44,037 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1617 transitions. Word has length 24 [2022-03-03 19:50:44,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:44,038 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1617 transitions. [2022-03-03 19:50:44,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1617 transitions. [2022-03-03 19:50:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:50:44,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:44,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:44,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-03 19:50:44,255 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 [2022-03-03 19:50:44,256 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1216410503, now seen corresponding path program 6 times [2022-03-03 19:50:44,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:44,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780065110] [2022-03-03 19:50:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:44,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:44,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:44,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780065110] [2022-03-03 19:50:44,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780065110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:44,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563820908] [2022-03-03 19:50:44,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:50:44,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:44,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:44,488 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) [2022-03-03 19:50:44,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:50:44,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:50:44,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:44,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:50:44,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:44,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:44,678 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 25 treesize of output 29 [2022-03-03 19:50:44,682 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-03 19:50:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:44,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:44,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:44,922 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 17 treesize of output 22 [2022-03-03 19:50:44,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:44,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-03-03 19:50:44,952 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-03 19:50:44,955 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-03 19:50:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:45,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563820908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:45,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:45,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2022-03-03 19:50:45,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599618909] [2022-03-03 19:50:45,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:45,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:50:45,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:45,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:50:45,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:50:45,044 INFO L87 Difference]: Start difference. First operand 537 states and 1617 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:47,028 INFO L93 Difference]: Finished difference Result 1448 states and 4322 transitions. [2022-03-03 19:50:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:50:47,029 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:50:47,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:47,035 INFO L225 Difference]: With dead ends: 1448 [2022-03-03 19:50:47,035 INFO L226 Difference]: Without dead ends: 1421 [2022-03-03 19:50:47,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=696, Invalid=2060, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 19:50:47,036 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 269 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:47,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 224 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 785 Invalid, 0 Unknown, 159 Unchecked, 0.5s Time] [2022-03-03 19:50:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2022-03-03 19:50:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 542. [2022-03-03 19:50:47,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.0129390018484288) internal successors, (1630), 541 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1630 transitions. [2022-03-03 19:50:47,055 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1630 transitions. Word has length 24 [2022-03-03 19:50:47,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:47,055 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1630 transitions. [2022-03-03 19:50:47,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:47,056 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1630 transitions. [2022-03-03 19:50:47,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:47,057 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:47,057 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:47,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:47,279 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 [2022-03-03 19:50:47,280 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:47,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:47,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2091300250, now seen corresponding path program 7 times [2022-03-03 19:50:47,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:47,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413396780] [2022-03-03 19:50:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:47,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:47,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:47,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413396780] [2022-03-03 19:50:47,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413396780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:47,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269245750] [2022-03-03 19:50:47,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:50:47,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:47,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:47,329 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) [2022-03-03 19:50:47,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:50:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:47,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:47,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:47,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:47,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269245750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:47,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:47,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:50:47,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423975733] [2022-03-03 19:50:47,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:47,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:50:47,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:47,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:50:47,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:50:47,602 INFO L87 Difference]: Start difference. First operand 542 states and 1630 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:48,487 INFO L93 Difference]: Finished difference Result 2382 states and 6924 transitions. [2022-03-03 19:50:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:50:48,487 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:48,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:48,497 INFO L225 Difference]: With dead ends: 2382 [2022-03-03 19:50:48,497 INFO L226 Difference]: Without dead ends: 2382 [2022-03-03 19:50:48,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:50:48,499 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 379 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:48,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 226 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:50:48,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-03-03 19:50:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 685. [2022-03-03 19:50:48,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.1827485380116958) internal successors, (2177), 684 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2177 transitions. [2022-03-03 19:50:48,526 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2177 transitions. Word has length 27 [2022-03-03 19:50:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:48,526 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 2177 transitions. [2022-03-03 19:50:48,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2177 transitions. [2022-03-03 19:50:48,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:48,528 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:48,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:48,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:48,743 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 [2022-03-03 19:50:48,744 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1715146358, now seen corresponding path program 8 times [2022-03-03 19:50:48,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:48,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484930141] [2022-03-03 19:50:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:48,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:48,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:48,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484930141] [2022-03-03 19:50:48,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484930141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:48,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842317747] [2022-03-03 19:50:48,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:50:48,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:48,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:48,791 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) [2022-03-03 19:50:48,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:50:48,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:50:48,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:48,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:48,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:48,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:49,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842317747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:49,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:49,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:50:49,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479586427] [2022-03-03 19:50:49,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:49,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:50:49,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:49,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:50:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:50:49,038 INFO L87 Difference]: Start difference. First operand 685 states and 2177 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:51,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:51,110 INFO L93 Difference]: Finished difference Result 3706 states and 10706 transitions. [2022-03-03 19:50:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-03 19:50:51,111 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:51,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:51,128 INFO L225 Difference]: With dead ends: 3706 [2022-03-03 19:50:51,128 INFO L226 Difference]: Without dead ends: 3706 [2022-03-03 19:50:51,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4308 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 19:50:51,132 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 638 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:51,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 294 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:50:51,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2022-03-03 19:50:51,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 689. [2022-03-03 19:50:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 3.193313953488372) internal successors, (2197), 688 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 2197 transitions. [2022-03-03 19:50:51,171 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 2197 transitions. Word has length 27 [2022-03-03 19:50:51,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:51,171 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 2197 transitions. [2022-03-03 19:50:51,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:51,171 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 2197 transitions. [2022-03-03 19:50:51,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:51,173 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:51,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:51,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:51,396 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 [2022-03-03 19:50:51,396 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:51,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1909047026, now seen corresponding path program 9 times [2022-03-03 19:50:51,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:51,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413711673] [2022-03-03 19:50:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:51,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:51,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:51,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413711673] [2022-03-03 19:50:51,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413711673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:51,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678382778] [2022-03-03 19:50:51,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:50:51,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:51,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:51,450 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) [2022-03-03 19:50:51,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:50:51,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:50:51,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:51,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:51,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:51,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:51,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678382778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:51,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:51,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:50:51,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728246753] [2022-03-03 19:50:51,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:51,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:50:51,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:51,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:50:51,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:50:51,705 INFO L87 Difference]: Start difference. First operand 689 states and 2197 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:52,702 INFO L93 Difference]: Finished difference Result 3048 states and 8766 transitions. [2022-03-03 19:50:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:50:52,702 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:52,715 INFO L225 Difference]: With dead ends: 3048 [2022-03-03 19:50:52,715 INFO L226 Difference]: Without dead ends: 3048 [2022-03-03 19:50:52,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 19:50:52,717 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 517 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:52,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 235 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:50:52,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2022-03-03 19:50:52,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 679. [2022-03-03 19:50:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 3.1814159292035398) internal successors, (2157), 678 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2157 transitions. [2022-03-03 19:50:52,747 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2157 transitions. Word has length 27 [2022-03-03 19:50:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:52,747 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2157 transitions. [2022-03-03 19:50:52,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2157 transitions. [2022-03-03 19:50:52,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:52,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:52,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:52,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:52,951 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 [2022-03-03 19:50:52,951 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:52,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2064323803, now seen corresponding path program 1 times [2022-03-03 19:50:52,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:52,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382240290] [2022-03-03 19:50:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:52,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:52,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:52,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382240290] [2022-03-03 19:50:52,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382240290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:52,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135114591] [2022-03-03 19:50:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:52,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:52,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:52,993 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) [2022-03-03 19:50:53,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:50:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:53,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:50:53,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:53,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:53,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135114591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:53,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:53,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:50:53,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977832317] [2022-03-03 19:50:53,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:53,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:50:53,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:53,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:50:53,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:50:53,208 INFO L87 Difference]: Start difference. First operand 679 states and 2157 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2022-03-03 19:50:53,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:53,353 INFO L93 Difference]: Finished difference Result 1471 states and 4421 transitions. [2022-03-03 19:50:53,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:50:53,354 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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 27 [2022-03-03 19:50:53,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:53,358 INFO L225 Difference]: With dead ends: 1471 [2022-03-03 19:50:53,358 INFO L226 Difference]: Without dead ends: 1453 [2022-03-03 19:50:53,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:50:53,359 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 226 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:53,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 64 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2022-03-03 19:50:53,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 959. [2022-03-03 19:50:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.2515657620041756) internal successors, (3115), 958 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3115 transitions. [2022-03-03 19:50:53,381 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3115 transitions. Word has length 27 [2022-03-03 19:50:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:53,381 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 3115 transitions. [2022-03-03 19:50:53,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2022-03-03 19:50:53,381 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3115 transitions. [2022-03-03 19:50:53,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:53,384 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:53,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:53,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:53,607 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 [2022-03-03 19:50:53,607 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:53,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:53,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1310692250, now seen corresponding path program 10 times [2022-03-03 19:50:53,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:53,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156371593] [2022-03-03 19:50:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:53,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:53,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:53,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156371593] [2022-03-03 19:50:53,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156371593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:53,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392862743] [2022-03-03 19:50:53,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:50:53,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:53,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:53,649 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) [2022-03-03 19:50:53,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:50:53,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:50:53,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:53,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:53,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:53,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:53,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392862743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:53,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:53,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:50:53,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185003132] [2022-03-03 19:50:53,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:53,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:50:53,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:53,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:50:53,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:50:53,863 INFO L87 Difference]: Start difference. First operand 959 states and 3115 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:54,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:54,166 INFO L93 Difference]: Finished difference Result 2387 states and 7369 transitions. [2022-03-03 19:50:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:50:54,166 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:54,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:54,172 INFO L225 Difference]: With dead ends: 2387 [2022-03-03 19:50:54,172 INFO L226 Difference]: Without dead ends: 2312 [2022-03-03 19:50:54,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:50:54,173 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 314 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:54,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 177 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:50:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2022-03-03 19:50:54,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1446. [2022-03-03 19:50:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.3155709342560553) internal successors, (4791), 1445 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:54,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4791 transitions. [2022-03-03 19:50:54,208 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4791 transitions. Word has length 27 [2022-03-03 19:50:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:54,208 INFO L470 AbstractCegarLoop]: Abstraction has 1446 states and 4791 transitions. [2022-03-03 19:50:54,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:54,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4791 transitions. [2022-03-03 19:50:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:54,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:54,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:54,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:54,434 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 [2022-03-03 19:50:54,434 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:54,435 INFO L85 PathProgramCache]: Analyzing trace with hash -365824241, now seen corresponding path program 2 times [2022-03-03 19:50:54,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:54,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758336629] [2022-03-03 19:50:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:54,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:54,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:54,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758336629] [2022-03-03 19:50:54,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758336629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:54,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686963751] [2022-03-03 19:50:54,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:50:54,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:54,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:54,466 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) [2022-03-03 19:50:54,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:50:54,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:50:54,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:54,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:50:54,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:54,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:54,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686963751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:54,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:54,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:50:54,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210617941] [2022-03-03 19:50:54,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:54,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:50:54,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:54,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:50:54,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:50:54,647 INFO L87 Difference]: Start difference. First operand 1446 states and 4791 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:54,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:54,845 INFO L93 Difference]: Finished difference Result 2562 states and 7823 transitions. [2022-03-03 19:50:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:50:54,845 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:54,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:54,852 INFO L225 Difference]: With dead ends: 2562 [2022-03-03 19:50:54,852 INFO L226 Difference]: Without dead ends: 2562 [2022-03-03 19:50:54,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:50:54,853 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 228 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:54,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 96 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2022-03-03 19:50:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1516. [2022-03-03 19:50:54,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.2825082508250825) internal successors, (4973), 1515 states have internal predecessors, (4973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 4973 transitions. [2022-03-03 19:50:54,891 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 4973 transitions. Word has length 27 [2022-03-03 19:50:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:54,891 INFO L470 AbstractCegarLoop]: Abstraction has 1516 states and 4973 transitions. [2022-03-03 19:50:54,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 4973 transitions. [2022-03-03 19:50:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:54,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:54,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:54,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:55,117 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 [2022-03-03 19:50:55,117 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:55,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1263858044, now seen corresponding path program 11 times [2022-03-03 19:50:55,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:55,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543373379] [2022-03-03 19:50:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:55,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:55,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:55,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543373379] [2022-03-03 19:50:55,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543373379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:55,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489040941] [2022-03-03 19:50:55,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:50:55,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:55,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:55,159 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) [2022-03-03 19:50:55,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:50:55,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:50:55,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:55,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:55,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:55,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:55,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489040941] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:55,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:55,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:50:55,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501753408] [2022-03-03 19:50:55,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:55,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:50:55,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:55,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:50:55,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:50:55,333 INFO L87 Difference]: Start difference. First operand 1516 states and 4973 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:55,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:55,939 INFO L93 Difference]: Finished difference Result 4948 states and 14924 transitions. [2022-03-03 19:50:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:50:55,940 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:55,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:55,954 INFO L225 Difference]: With dead ends: 4948 [2022-03-03 19:50:55,954 INFO L226 Difference]: Without dead ends: 4948 [2022-03-03 19:50:55,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:50:55,958 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 274 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:55,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 182 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:50:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2022-03-03 19:50:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 1544. [2022-03-03 19:50:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.2773817239144525) internal successors, (5057), 1543 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5057 transitions. [2022-03-03 19:50:56,024 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5057 transitions. Word has length 27 [2022-03-03 19:50:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:56,024 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 5057 transitions. [2022-03-03 19:50:56,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5057 transitions. [2022-03-03 19:50:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:56,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:56,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:56,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:56,247 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 [2022-03-03 19:50:56,247 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1176133672, now seen corresponding path program 12 times [2022-03-03 19:50:56,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:56,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758477829] [2022-03-03 19:50:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:56,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:56,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:56,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758477829] [2022-03-03 19:50:56,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758477829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:56,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696517612] [2022-03-03 19:50:56,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:50:56,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:56,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:56,296 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) [2022-03-03 19:50:56,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:50:56,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:50:56,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:56,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:56,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:56,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:56,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696517612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:56,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:56,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:50:56,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957959636] [2022-03-03 19:50:56,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:56,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:50:56,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:56,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:50:56,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:50:56,510 INFO L87 Difference]: Start difference. First operand 1544 states and 5057 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:57,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:57,316 INFO L93 Difference]: Finished difference Result 4977 states and 15097 transitions. [2022-03-03 19:50:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:50:57,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:57,331 INFO L225 Difference]: With dead ends: 4977 [2022-03-03 19:50:57,331 INFO L226 Difference]: Without dead ends: 4977 [2022-03-03 19:50:57,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:50:57,332 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 325 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:57,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 166 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:50:57,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2022-03-03 19:50:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 1698. [2022-03-03 19:50:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 3.2421921037124335) internal successors, (5502), 1697 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 5502 transitions. [2022-03-03 19:50:57,400 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 5502 transitions. Word has length 27 [2022-03-03 19:50:57,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:57,401 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 5502 transitions. [2022-03-03 19:50:57,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:57,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 5502 transitions. [2022-03-03 19:50:57,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:57,404 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:57,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:57,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:57,627 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 [2022-03-03 19:50:57,628 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:57,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1798101086, now seen corresponding path program 13 times [2022-03-03 19:50:57,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:57,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962551421] [2022-03-03 19:50:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:57,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:57,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:57,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962551421] [2022-03-03 19:50:57,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962551421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:57,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536736885] [2022-03-03 19:50:57,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:50:57,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:57,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:57,667 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) [2022-03-03 19:50:57,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:50:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:57,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:57,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:57,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:57,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536736885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:57,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:57,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-03 19:50:57,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441853425] [2022-03-03 19:50:57,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:57,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:50:57,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:57,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:50:57,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:50:57,835 INFO L87 Difference]: Start difference. First operand 1698 states and 5502 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:58,158 INFO L93 Difference]: Finished difference Result 3298 states and 10264 transitions. [2022-03-03 19:50:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:50:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:58,166 INFO L225 Difference]: With dead ends: 3298 [2022-03-03 19:50:58,166 INFO L226 Difference]: Without dead ends: 3298 [2022-03-03 19:50:58,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:50:58,167 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 224 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:58,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 245 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:50:58,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3298 states. [2022-03-03 19:50:58,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3298 to 2095. [2022-03-03 19:50:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 2094 states have (on average 3.292263610315186) internal successors, (6894), 2094 states have internal predecessors, (6894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 6894 transitions. [2022-03-03 19:50:58,222 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 6894 transitions. Word has length 27 [2022-03-03 19:50:58,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:58,222 INFO L470 AbstractCegarLoop]: Abstraction has 2095 states and 6894 transitions. [2022-03-03 19:50:58,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:58,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 6894 transitions. [2022-03-03 19:50:58,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:58,227 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:58,227 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:58,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:58,443 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 [2022-03-03 19:50:58,443 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:58,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:58,444 INFO L85 PathProgramCache]: Analyzing trace with hash -373797268, now seen corresponding path program 14 times [2022-03-03 19:50:58,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:58,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366597679] [2022-03-03 19:50:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:58,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:58,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:58,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366597679] [2022-03-03 19:50:58,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366597679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:58,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416531846] [2022-03-03 19:50:58,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:50:58,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:58,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:58,492 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) [2022-03-03 19:50:58,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:50:58,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:50:58,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:58,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:58,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:58,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:58,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416531846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:58,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:58,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:50:58,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936979725] [2022-03-03 19:50:58,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:58,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:50:58,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:58,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:50:58,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:50:58,707 INFO L87 Difference]: Start difference. First operand 2095 states and 6894 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:59,289 INFO L93 Difference]: Finished difference Result 5572 states and 17373 transitions. [2022-03-03 19:50:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:50:59,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:59,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:59,298 INFO L225 Difference]: With dead ends: 5572 [2022-03-03 19:50:59,298 INFO L226 Difference]: Without dead ends: 5568 [2022-03-03 19:50:59,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:50:59,299 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 314 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:59,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 166 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:50:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5568 states. [2022-03-03 19:50:59,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5568 to 2107. [2022-03-03 19:50:59,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2106 states have (on average 3.2830009496676165) internal successors, (6914), 2106 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:59,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 6914 transitions. [2022-03-03 19:50:59,360 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 6914 transitions. Word has length 27 [2022-03-03 19:50:59,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:59,361 INFO L470 AbstractCegarLoop]: Abstraction has 2107 states and 6914 transitions. [2022-03-03 19:50:59,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:59,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 6914 transitions. [2022-03-03 19:50:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:59,365 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:59,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:59,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:59,579 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 [2022-03-03 19:50:59,579 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:59,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:59,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1969066128, now seen corresponding path program 15 times [2022-03-03 19:50:59,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:59,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597758787] [2022-03-03 19:50:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:59,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:59,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:59,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597758787] [2022-03-03 19:50:59,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597758787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:59,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369989024] [2022-03-03 19:50:59,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:50:59,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:59,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:59,633 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) [2022-03-03 19:50:59,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:50:59,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:50:59,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:59,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:59,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:59,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:59,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369989024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:59,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:59,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:50:59,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157426488] [2022-03-03 19:50:59,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:59,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:50:59,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:59,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:50:59,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:50:59,859 INFO L87 Difference]: Start difference. First operand 2107 states and 6914 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2022-03-03 19:51:00,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:00,879 INFO L93 Difference]: Finished difference Result 6717 states and 20024 transitions. [2022-03-03 19:51:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 19:51:00,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) Word has length 27 [2022-03-03 19:51:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:00,892 INFO L225 Difference]: With dead ends: 6717 [2022-03-03 19:51:00,892 INFO L226 Difference]: Without dead ends: 6717 [2022-03-03 19:51:00,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 19:51:00,894 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 512 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:00,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 270 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:51:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2022-03-03 19:51:00,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 2278. [2022-03-03 19:51:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 3.3205972771190164) internal successors, (7561), 2277 states have internal predecessors, (7561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:00,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 7561 transitions. [2022-03-03 19:51:00,964 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 7561 transitions. Word has length 27 [2022-03-03 19:51:00,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:00,965 INFO L470 AbstractCegarLoop]: Abstraction has 2278 states and 7561 transitions. [2022-03-03 19:51:00,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2022-03-03 19:51:00,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 7561 transitions. [2022-03-03 19:51:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:00,970 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:00,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:00,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:01,182 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 [2022-03-03 19:51:01,183 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:01,183 INFO L85 PathProgramCache]: Analyzing trace with hash -186416658, now seen corresponding path program 16 times [2022-03-03 19:51:01,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:01,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484922615] [2022-03-03 19:51:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:01,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:01,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:01,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484922615] [2022-03-03 19:51:01,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484922615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:01,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345162382] [2022-03-03 19:51:01,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:51:01,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:01,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:01,234 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) [2022-03-03 19:51:01,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:51:01,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:51:01,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:01,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:01,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:01,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:01,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345162382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:01,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:01,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:51:01,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473593439] [2022-03-03 19:51:01,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:01,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:51:01,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:01,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:51:01,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:51:01,453 INFO L87 Difference]: Start difference. First operand 2278 states and 7561 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2022-03-03 19:51:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:02,830 INFO L93 Difference]: Finished difference Result 6560 states and 19950 transitions. [2022-03-03 19:51:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 19:51:02,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) Word has length 27 [2022-03-03 19:51:02,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:02,843 INFO L225 Difference]: With dead ends: 6560 [2022-03-03 19:51:02,843 INFO L226 Difference]: Without dead ends: 6556 [2022-03-03 19:51:02,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 19:51:02,845 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 520 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:02,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 319 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:51:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2022-03-03 19:51:02,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 2278. [2022-03-03 19:51:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 3.3197189284145807) internal successors, (7559), 2277 states have internal predecessors, (7559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 7559 transitions. [2022-03-03 19:51:02,928 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 7559 transitions. Word has length 27 [2022-03-03 19:51:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:02,928 INFO L470 AbstractCegarLoop]: Abstraction has 2278 states and 7559 transitions. [2022-03-03 19:51:02,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2022-03-03 19:51:02,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 7559 transitions. [2022-03-03 19:51:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:02,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:02,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:02,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:03,147 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 [2022-03-03 19:51:03,147 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash -274598579, now seen corresponding path program 3 times [2022-03-03 19:51:03,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:03,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949830096] [2022-03-03 19:51:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:03,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:03,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:03,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949830096] [2022-03-03 19:51:03,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949830096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:03,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795207467] [2022-03-03 19:51:03,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:51:03,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:03,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:03,182 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) [2022-03-03 19:51:03,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:51:03,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:51:03,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:03,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:51:03,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:03,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:03,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795207467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:03,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:03,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-03 19:51:03,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85500252] [2022-03-03 19:51:03,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:03,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:51:03,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:51:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:51:03,333 INFO L87 Difference]: Start difference. First operand 2278 states and 7559 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:03,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:03,469 INFO L93 Difference]: Finished difference Result 2906 states and 9295 transitions. [2022-03-03 19:51:03,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:51:03,470 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:51:03,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:03,474 INFO L225 Difference]: With dead ends: 2906 [2022-03-03 19:51:03,474 INFO L226 Difference]: Without dead ends: 2906 [2022-03-03 19:51:03,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:51:03,475 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 124 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:03,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 102 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:51:03,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2022-03-03 19:51:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 2121. [2022-03-03 19:51:03,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 3.3141509433962266) internal successors, (7026), 2120 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 7026 transitions. [2022-03-03 19:51:03,506 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 7026 transitions. Word has length 27 [2022-03-03 19:51:03,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:03,507 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 7026 transitions. [2022-03-03 19:51:03,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 7026 transitions. [2022-03-03 19:51:03,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:03,510 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:03,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:03,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:03,710 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 [2022-03-03 19:51:03,710 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash -995298344, now seen corresponding path program 17 times [2022-03-03 19:51:03,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:03,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903491607] [2022-03-03 19:51:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:03,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:03,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:03,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903491607] [2022-03-03 19:51:03,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903491607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:03,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571053813] [2022-03-03 19:51:03,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:51:03,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:03,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:03,750 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) [2022-03-03 19:51:03,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:51:03,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:51:03,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:03,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:03,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:03,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:03,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571053813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:03,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:03,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 19:51:03,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879319641] [2022-03-03 19:51:03,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:03,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:51:03,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:51:03,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:51:03,905 INFO L87 Difference]: Start difference. First operand 2121 states and 7026 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2022-03-03 19:51:04,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:04,304 INFO L93 Difference]: Finished difference Result 4738 states and 14874 transitions. [2022-03-03 19:51:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:51:04,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2022-03-03 19:51:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:04,312 INFO L225 Difference]: With dead ends: 4738 [2022-03-03 19:51:04,312 INFO L226 Difference]: Without dead ends: 4738 [2022-03-03 19:51:04,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:51:04,313 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 219 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:04,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 146 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:51:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2022-03-03 19:51:04,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 2263. [2022-03-03 19:51:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.2904509283819627) internal successors, (7443), 2262 states have internal predecessors, (7443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7443 transitions. [2022-03-03 19:51:04,373 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7443 transitions. Word has length 27 [2022-03-03 19:51:04,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:04,374 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7443 transitions. [2022-03-03 19:51:04,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2022-03-03 19:51:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7443 transitions. [2022-03-03 19:51:04,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:04,378 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:04,378 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:04,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:04,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-03 19:51:04,591 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:04,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:04,592 INFO L85 PathProgramCache]: Analyzing trace with hash -342770436, now seen corresponding path program 18 times [2022-03-03 19:51:04,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:04,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731746902] [2022-03-03 19:51:04,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:04,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:04,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:04,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731746902] [2022-03-03 19:51:04,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731746902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:04,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678766092] [2022-03-03 19:51:04,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:51:04,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:04,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:04,627 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) [2022-03-03 19:51:04,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:51:04,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:51:04,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:04,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:04,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:04,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:04,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678766092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:04,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:04,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 19:51:04,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664053005] [2022-03-03 19:51:04,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:04,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:51:04,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:04,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:51:04,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:51:04,780 INFO L87 Difference]: Start difference. First operand 2263 states and 7443 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2022-03-03 19:51:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:05,171 INFO L93 Difference]: Finished difference Result 5029 states and 15712 transitions. [2022-03-03 19:51:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:51:05,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 27 [2022-03-03 19:51:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:05,179 INFO L225 Difference]: With dead ends: 5029 [2022-03-03 19:51:05,179 INFO L226 Difference]: Without dead ends: 5029 [2022-03-03 19:51:05,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:51:05,180 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 207 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:05,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 127 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:51:05,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2022-03-03 19:51:05,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 2429. [2022-03-03 19:51:05,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2428 states have (on average 3.2701812191103787) internal successors, (7940), 2428 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:05,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 7940 transitions. [2022-03-03 19:51:05,241 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 7940 transitions. Word has length 27 [2022-03-03 19:51:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:05,241 INFO L470 AbstractCegarLoop]: Abstraction has 2429 states and 7940 transitions. [2022-03-03 19:51:05,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2022-03-03 19:51:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 7940 transitions. [2022-03-03 19:51:05,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:05,246 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:05,246 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:05,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:05,466 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 [2022-03-03 19:51:05,467 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:05,467 INFO L85 PathProgramCache]: Analyzing trace with hash -670100712, now seen corresponding path program 19 times [2022-03-03 19:51:05,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:05,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9163160] [2022-03-03 19:51:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:05,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:05,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:05,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9163160] [2022-03-03 19:51:05,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9163160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:05,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084172301] [2022-03-03 19:51:05,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:51:05,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:05,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:05,515 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) [2022-03-03 19:51:05,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:51:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:05,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:05,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:05,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:05,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084172301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:05,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:05,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-03 19:51:05,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940921191] [2022-03-03 19:51:05,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:05,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:51:05,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:05,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:51:05,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:51:05,709 INFO L87 Difference]: Start difference. First operand 2429 states and 7940 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:05,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:05,973 INFO L93 Difference]: Finished difference Result 3230 states and 10321 transitions. [2022-03-03 19:51:05,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:51:05,974 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:51:05,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:05,979 INFO L225 Difference]: With dead ends: 3230 [2022-03-03 19:51:05,979 INFO L226 Difference]: Without dead ends: 3220 [2022-03-03 19:51:05,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:51:05,980 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 187 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:05,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 194 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:51:05,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2022-03-03 19:51:06,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2644. [2022-03-03 19:51:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2643 states have (on average 3.3019296254256525) internal successors, (8727), 2643 states have internal predecessors, (8727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:06,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 8727 transitions. [2022-03-03 19:51:06,021 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 8727 transitions. Word has length 27 [2022-03-03 19:51:06,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:06,021 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 8727 transitions. [2022-03-03 19:51:06,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:06,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 8727 transitions. [2022-03-03 19:51:06,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:06,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:06,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:06,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:06,249 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 [2022-03-03 19:51:06,249 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1892701376, now seen corresponding path program 20 times [2022-03-03 19:51:06,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:06,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678347196] [2022-03-03 19:51:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:06,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:06,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:06,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678347196] [2022-03-03 19:51:06,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678347196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:06,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235657968] [2022-03-03 19:51:06,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:51:06,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:06,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:06,287 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) [2022-03-03 19:51:06,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:51:06,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:51:06,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:06,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:06,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:06,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:06,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235657968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:06,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:06,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 19:51:06,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517449830] [2022-03-03 19:51:06,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:06,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:51:06,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:06,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:51:06,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:51:06,453 INFO L87 Difference]: Start difference. First operand 2644 states and 8727 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2022-03-03 19:51:06,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:06,777 INFO L93 Difference]: Finished difference Result 5352 states and 17038 transitions. [2022-03-03 19:51:06,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:51:06,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 27 [2022-03-03 19:51:06,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:06,785 INFO L225 Difference]: With dead ends: 5352 [2022-03-03 19:51:06,786 INFO L226 Difference]: Without dead ends: 5348 [2022-03-03 19:51:06,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:51:06,786 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 210 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:06,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 120 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:51:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2022-03-03 19:51:06,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 2644. [2022-03-03 19:51:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2643 states have (on average 3.2996594778660615) internal successors, (8721), 2643 states have internal predecessors, (8721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:06,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 8721 transitions. [2022-03-03 19:51:06,839 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 8721 transitions. Word has length 27 [2022-03-03 19:51:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:06,839 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 8721 transitions. [2022-03-03 19:51:06,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2022-03-03 19:51:06,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 8721 transitions. [2022-03-03 19:51:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:06,844 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:06,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:06,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:07,056 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 [2022-03-03 19:51:07,057 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:07,057 INFO L85 PathProgramCache]: Analyzing trace with hash -400696644, now seen corresponding path program 21 times [2022-03-03 19:51:07,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:07,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731437354] [2022-03-03 19:51:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:07,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:07,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:07,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731437354] [2022-03-03 19:51:07,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731437354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:07,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558475527] [2022-03-03 19:51:07,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:51:07,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:07,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:07,098 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) [2022-03-03 19:51:07,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:51:07,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:51:07,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:07,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:07,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:07,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:07,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558475527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:07,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:07,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 19:51:07,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813505451] [2022-03-03 19:51:07,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:07,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:51:07,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:07,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:51:07,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:51:07,251 INFO L87 Difference]: Start difference. First operand 2644 states and 8721 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2022-03-03 19:51:07,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:07,602 INFO L93 Difference]: Finished difference Result 5332 states and 16988 transitions. [2022-03-03 19:51:07,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:51:07,602 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2022-03-03 19:51:07,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:07,610 INFO L225 Difference]: With dead ends: 5332 [2022-03-03 19:51:07,610 INFO L226 Difference]: Without dead ends: 5316 [2022-03-03 19:51:07,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:51:07,611 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 218 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:07,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 146 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:51:07,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5316 states. [2022-03-03 19:51:07,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5316 to 2652. [2022-03-03 19:51:07,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 3.29422859298378) internal successors, (8733), 2651 states have internal predecessors, (8733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 8733 transitions. [2022-03-03 19:51:07,674 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 8733 transitions. Word has length 27 [2022-03-03 19:51:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:07,674 INFO L470 AbstractCegarLoop]: Abstraction has 2652 states and 8733 transitions. [2022-03-03 19:51:07,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2022-03-03 19:51:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 8733 transitions. [2022-03-03 19:51:07,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:07,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:07,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:07,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-03 19:51:07,878 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 [2022-03-03 19:51:07,879 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:07,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:07,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1940484412, now seen corresponding path program 22 times [2022-03-03 19:51:07,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:07,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200895453] [2022-03-03 19:51:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:07,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:07,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:07,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200895453] [2022-03-03 19:51:07,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200895453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:07,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263627157] [2022-03-03 19:51:07,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:51:07,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:07,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:07,923 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) [2022-03-03 19:51:07,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:51:07,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:51:07,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:07,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:07,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:08,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:08,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263627157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:08,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:08,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:51:08,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626623735] [2022-03-03 19:51:08,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:08,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:51:08,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:08,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:51:08,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:51:08,140 INFO L87 Difference]: Start difference. First operand 2652 states and 8733 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:09,088 INFO L93 Difference]: Finished difference Result 11005 states and 34872 transitions. [2022-03-03 19:51:09,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:51:09,088 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:51:09,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:09,107 INFO L225 Difference]: With dead ends: 11005 [2022-03-03 19:51:09,108 INFO L226 Difference]: Without dead ends: 11005 [2022-03-03 19:51:09,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 19:51:09,108 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 547 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:09,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 212 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:51:09,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11005 states. [2022-03-03 19:51:09,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11005 to 3423. [2022-03-03 19:51:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3423 states, 3422 states have (on average 3.4585037989479837) internal successors, (11835), 3422 states have internal predecessors, (11835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3423 states to 3423 states and 11835 transitions. [2022-03-03 19:51:09,204 INFO L78 Accepts]: Start accepts. Automaton has 3423 states and 11835 transitions. Word has length 27 [2022-03-03 19:51:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:09,204 INFO L470 AbstractCegarLoop]: Abstraction has 3423 states and 11835 transitions. [2022-03-03 19:51:09,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:09,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3423 states and 11835 transitions. [2022-03-03 19:51:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:09,210 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:09,210 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:09,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-03 19:51:09,410 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 [2022-03-03 19:51:09,410 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:09,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:09,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1746583744, now seen corresponding path program 23 times [2022-03-03 19:51:09,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:09,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599246442] [2022-03-03 19:51:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:09,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:09,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:09,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599246442] [2022-03-03 19:51:09,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599246442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:09,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008826362] [2022-03-03 19:51:09,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:51:09,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:09,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:09,456 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) [2022-03-03 19:51:09,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:51:09,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:51:09,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:09,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:09,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:09,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:09,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008826362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:09,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:09,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:51:09,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193624681] [2022-03-03 19:51:09,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:09,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:51:09,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:09,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:51:09,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:51:09,690 INFO L87 Difference]: Start difference. First operand 3423 states and 11835 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:10,515 INFO L93 Difference]: Finished difference Result 9376 states and 29674 transitions. [2022-03-03 19:51:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:51:10,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:51:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:10,532 INFO L225 Difference]: With dead ends: 9376 [2022-03-03 19:51:10,532 INFO L226 Difference]: Without dead ends: 9376 [2022-03-03 19:51:10,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 19:51:10,533 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 501 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:10,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 212 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:51:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9376 states. [2022-03-03 19:51:10,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9376 to 3420. [2022-03-03 19:51:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.4574436969874234) internal successors, (11821), 3419 states have internal predecessors, (11821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 11821 transitions. [2022-03-03 19:51:10,674 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 11821 transitions. Word has length 27 [2022-03-03 19:51:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:10,674 INFO L470 AbstractCegarLoop]: Abstraction has 3420 states and 11821 transitions. [2022-03-03 19:51:10,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 11821 transitions. [2022-03-03 19:51:10,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:10,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:10,682 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:10,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:10,903 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 [2022-03-03 19:51:10,903 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:10,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:10,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1374673978, now seen corresponding path program 24 times [2022-03-03 19:51:10,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:10,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816266322] [2022-03-03 19:51:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:10,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:10,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:10,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816266322] [2022-03-03 19:51:10,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816266322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:10,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447969445] [2022-03-03 19:51:10,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:51:10,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:10,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:10,946 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) [2022-03-03 19:51:10,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:51:10,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:51:10,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:10,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:10,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:11,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:11,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447969445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:11,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:11,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 19:51:11,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261549657] [2022-03-03 19:51:11,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:11,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:51:11,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:11,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:51:11,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:51:11,127 INFO L87 Difference]: Start difference. First operand 3420 states and 11821 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:11,940 INFO L93 Difference]: Finished difference Result 10210 states and 32078 transitions. [2022-03-03 19:51:11,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:51:11,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:51:11,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:11,959 INFO L225 Difference]: With dead ends: 10210 [2022-03-03 19:51:11,959 INFO L226 Difference]: Without dead ends: 10210 [2022-03-03 19:51:11,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:51:11,960 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 374 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:11,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 199 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:51:11,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10210 states. [2022-03-03 19:51:12,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10210 to 3434. [2022-03-03 19:51:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.459364986891931) internal successors, (11876), 3433 states have internal predecessors, (11876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11876 transitions. [2022-03-03 19:51:12,112 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11876 transitions. Word has length 27 [2022-03-03 19:51:12,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:12,113 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11876 transitions. [2022-03-03 19:51:12,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11876 transitions. [2022-03-03 19:51:12,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:12,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:12,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:12,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:12,335 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 [2022-03-03 19:51:12,335 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:12,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1185455680, now seen corresponding path program 25 times [2022-03-03 19:51:12,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:12,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949776125] [2022-03-03 19:51:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:12,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:12,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:12,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949776125] [2022-03-03 19:51:12,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949776125] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:12,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415974077] [2022-03-03 19:51:12,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:51:12,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:12,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:12,378 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) [2022-03-03 19:51:12,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:51:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:12,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:12,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:12,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:12,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415974077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:12,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:12,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 19:51:12,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133292718] [2022-03-03 19:51:12,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:12,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:51:12,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:12,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:51:12,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:51:12,553 INFO L87 Difference]: Start difference. First operand 3434 states and 11876 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:13,223 INFO L93 Difference]: Finished difference Result 9874 states and 31277 transitions. [2022-03-03 19:51:13,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:51:13,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:51:13,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:13,240 INFO L225 Difference]: With dead ends: 9874 [2022-03-03 19:51:13,241 INFO L226 Difference]: Without dead ends: 9870 [2022-03-03 19:51:13,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:51:13,241 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 510 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:13,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 161 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:51:13,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9870 states. [2022-03-03 19:51:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9870 to 3434. [2022-03-03 19:51:13,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.45819982522575) internal successors, (11872), 3433 states have internal predecessors, (11872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11872 transitions. [2022-03-03 19:51:13,333 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11872 transitions. Word has length 27 [2022-03-03 19:51:13,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:13,333 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11872 transitions. [2022-03-03 19:51:13,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:13,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11872 transitions. [2022-03-03 19:51:13,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:13,341 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:13,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:13,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-03 19:51:13,546 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 [2022-03-03 19:51:13,546 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:13,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:13,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1719990400, now seen corresponding path program 26 times [2022-03-03 19:51:13,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:13,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625555796] [2022-03-03 19:51:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:13,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:13,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:13,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625555796] [2022-03-03 19:51:13,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625555796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:13,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557642289] [2022-03-03 19:51:13,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:51:13,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:13,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:13,589 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) [2022-03-03 19:51:13,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:51:13,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:51:13,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:13,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:13,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:13,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:13,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557642289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:13,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:13,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:51:13,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477619205] [2022-03-03 19:51:13,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:13,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:51:13,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:13,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:51:13,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:51:13,798 INFO L87 Difference]: Start difference. First operand 3434 states and 11872 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2022-03-03 19:51:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:14,491 INFO L93 Difference]: Finished difference Result 8065 states and 25290 transitions. [2022-03-03 19:51:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:51:14,491 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) Word has length 27 [2022-03-03 19:51:14,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:14,506 INFO L225 Difference]: With dead ends: 8065 [2022-03-03 19:51:14,506 INFO L226 Difference]: Without dead ends: 8065 [2022-03-03 19:51:14,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:51:14,507 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 438 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:14,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 224 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:51:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2022-03-03 19:51:14,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 3440. [2022-03-03 19:51:14,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 3.4594358825239895) internal successors, (11897), 3439 states have internal predecessors, (11897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 11897 transitions. [2022-03-03 19:51:14,597 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 11897 transitions. Word has length 27 [2022-03-03 19:51:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:14,597 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 11897 transitions. [2022-03-03 19:51:14,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2022-03-03 19:51:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 11897 transitions. [2022-03-03 19:51:14,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:14,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:14,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:14,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-03 19:51:14,804 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 [2022-03-03 19:51:14,804 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:14,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash 62659070, now seen corresponding path program 27 times [2022-03-03 19:51:14,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:14,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332003870] [2022-03-03 19:51:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:14,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:14,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:14,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332003870] [2022-03-03 19:51:14,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332003870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:14,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701060990] [2022-03-03 19:51:14,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:51:14,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:14,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:14,855 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) [2022-03-03 19:51:14,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:51:14,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:51:14,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:14,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:14,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:14,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:15,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701060990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:15,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:15,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:51:15,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725635772] [2022-03-03 19:51:15,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:15,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:51:15,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:15,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:51:15,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:51:15,079 INFO L87 Difference]: Start difference. First operand 3440 states and 11897 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2022-03-03 19:51:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:15,962 INFO L93 Difference]: Finished difference Result 7992 states and 25480 transitions. [2022-03-03 19:51:15,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:51:15,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) Word has length 27 [2022-03-03 19:51:15,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:15,977 INFO L225 Difference]: With dead ends: 7992 [2022-03-03 19:51:15,977 INFO L226 Difference]: Without dead ends: 7988 [2022-03-03 19:51:15,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:51:15,978 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 504 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:15,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 185 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:51:15,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7988 states. [2022-03-03 19:51:16,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7988 to 3434. [2022-03-03 19:51:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.45819982522575) internal successors, (11872), 3433 states have internal predecessors, (11872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:16,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11872 transitions. [2022-03-03 19:51:16,068 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11872 transitions. Word has length 27 [2022-03-03 19:51:16,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:16,068 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11872 transitions. [2022-03-03 19:51:16,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2022-03-03 19:51:16,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11872 transitions. [2022-03-03 19:51:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:16,076 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:16,076 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:16,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-03 19:51:16,284 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 [2022-03-03 19:51:16,284 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:16,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:16,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1105927550, now seen corresponding path program 28 times [2022-03-03 19:51:16,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:16,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661279131] [2022-03-03 19:51:16,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:16,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:16,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:16,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661279131] [2022-03-03 19:51:16,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661279131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:16,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253131876] [2022-03-03 19:51:16,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:51:16,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:16,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:16,335 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) [2022-03-03 19:51:16,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:51:16,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:51:16,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:16,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:16,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:16,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:16,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253131876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:16,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:16,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:51:16,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961800680] [2022-03-03 19:51:16,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:16,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:51:16,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:16,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:51:16,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:51:16,536 INFO L87 Difference]: Start difference. First operand 3434 states and 11872 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:17,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:17,278 INFO L93 Difference]: Finished difference Result 8817 states and 28422 transitions. [2022-03-03 19:51:17,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:51:17,278 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:51:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:17,294 INFO L225 Difference]: With dead ends: 8817 [2022-03-03 19:51:17,294 INFO L226 Difference]: Without dead ends: 8817 [2022-03-03 19:51:17,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:51:17,295 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 321 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:17,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 167 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:51:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8817 states. [2022-03-03 19:51:17,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8817 to 3737. [2022-03-03 19:51:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 3.4494111349036403) internal successors, (12887), 3736 states have internal predecessors, (12887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:17,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 12887 transitions. [2022-03-03 19:51:17,387 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 12887 transitions. Word has length 27 [2022-03-03 19:51:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:17,387 INFO L470 AbstractCegarLoop]: Abstraction has 3737 states and 12887 transitions. [2022-03-03 19:51:17,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 12887 transitions. [2022-03-03 19:51:17,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:17,393 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:17,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:17,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-03 19:51:17,593 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 [2022-03-03 19:51:17,594 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:17,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:17,594 INFO L85 PathProgramCache]: Analyzing trace with hash 916709252, now seen corresponding path program 29 times [2022-03-03 19:51:17,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:17,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756034754] [2022-03-03 19:51:17,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:17,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:17,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:17,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756034754] [2022-03-03 19:51:17,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756034754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:17,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292044461] [2022-03-03 19:51:17,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:51:17,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:17,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:17,635 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) [2022-03-03 19:51:17,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:51:17,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:51:17,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:17,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:17,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:17,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:17,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292044461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:17,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:17,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:51:17,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316521565] [2022-03-03 19:51:17,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:17,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:51:17,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:51:17,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:51:17,799 INFO L87 Difference]: Start difference. First operand 3737 states and 12887 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:18,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:18,384 INFO L93 Difference]: Finished difference Result 8396 states and 27364 transitions. [2022-03-03 19:51:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:51:18,384 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:51:18,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:18,399 INFO L225 Difference]: With dead ends: 8396 [2022-03-03 19:51:18,399 INFO L226 Difference]: Without dead ends: 8388 [2022-03-03 19:51:18,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:51:18,400 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 362 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:18,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 141 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:51:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8388 states. [2022-03-03 19:51:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8388 to 3725. [2022-03-03 19:51:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 3.44656283566058) internal successors, (12835), 3724 states have internal predecessors, (12835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 12835 transitions. [2022-03-03 19:51:18,486 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 12835 transitions. Word has length 27 [2022-03-03 19:51:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:18,486 INFO L470 AbstractCegarLoop]: Abstraction has 3725 states and 12835 transitions. [2022-03-03 19:51:18,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 12835 transitions. [2022-03-03 19:51:18,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:18,493 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:18,493 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:18,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-03 19:51:18,693 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 [2022-03-03 19:51:18,693 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:18,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:18,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1560091512, now seen corresponding path program 30 times [2022-03-03 19:51:18,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:18,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559341515] [2022-03-03 19:51:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:18,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:18,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:18,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559341515] [2022-03-03 19:51:18,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559341515] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:18,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042703301] [2022-03-03 19:51:18,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:51:18,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:18,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:18,742 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) [2022-03-03 19:51:18,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:51:18,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:51:18,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:18,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:18,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:18,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:18,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042703301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:18,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:18,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:51:18,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401607866] [2022-03-03 19:51:18,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:18,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:51:18,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:18,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:51:18,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:51:18,935 INFO L87 Difference]: Start difference. First operand 3725 states and 12835 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:19,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:19,561 INFO L93 Difference]: Finished difference Result 9052 states and 28913 transitions. [2022-03-03 19:51:19,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:51:19,561 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:51:19,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:19,601 INFO L225 Difference]: With dead ends: 9052 [2022-03-03 19:51:19,601 INFO L226 Difference]: Without dead ends: 9036 [2022-03-03 19:51:19,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:51:19,602 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 339 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:19,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 181 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:51:19,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2022-03-03 19:51:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 3753. [2022-03-03 19:51:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 3.446961620469083) internal successors, (12933), 3752 states have internal predecessors, (12933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 12933 transitions. [2022-03-03 19:51:19,679 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 12933 transitions. Word has length 27 [2022-03-03 19:51:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:19,680 INFO L470 AbstractCegarLoop]: Abstraction has 3753 states and 12933 transitions. [2022-03-03 19:51:19,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 12933 transitions. [2022-03-03 19:51:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:19,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:19,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:19,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-03 19:51:19,885 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 [2022-03-03 19:51:19,885 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:19,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1872447484, now seen corresponding path program 31 times [2022-03-03 19:51:19,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:19,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150007564] [2022-03-03 19:51:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:19,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:19,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:19,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150007564] [2022-03-03 19:51:19,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150007564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:19,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237600747] [2022-03-03 19:51:19,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:51:19,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:19,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:19,933 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) [2022-03-03 19:51:19,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:51:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:19,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:19,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:20,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:20,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237600747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:20,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:20,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:51:20,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478724185] [2022-03-03 19:51:20,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:20,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:51:20,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:20,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:51:20,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:51:20,164 INFO L87 Difference]: Start difference. First operand 3753 states and 12933 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) [2022-03-03 19:51:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:20,853 INFO L93 Difference]: Finished difference Result 7240 states and 23141 transitions. [2022-03-03 19:51:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:51:20,854 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) Word has length 27 [2022-03-03 19:51:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:20,867 INFO L225 Difference]: With dead ends: 7240 [2022-03-03 19:51:20,867 INFO L226 Difference]: Without dead ends: 7240 [2022-03-03 19:51:20,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:51:20,868 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 470 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:20,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 268 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:51:20,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7240 states. [2022-03-03 19:51:20,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7240 to 3938. [2022-03-03 19:51:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 3.4384048768097535) internal successors, (13537), 3937 states have internal predecessors, (13537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 13537 transitions. [2022-03-03 19:51:20,971 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 13537 transitions. Word has length 27 [2022-03-03 19:51:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:20,971 INFO L470 AbstractCegarLoop]: Abstraction has 3938 states and 13537 transitions. [2022-03-03 19:51:20,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) [2022-03-03 19:51:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 13537 transitions. [2022-03-03 19:51:20,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:20,976 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:20,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:20,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-03 19:51:21,177 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 [2022-03-03 19:51:21,177 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:21,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:21,178 INFO L85 PathProgramCache]: Analyzing trace with hash -639870342, now seen corresponding path program 32 times [2022-03-03 19:51:21,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:21,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988447735] [2022-03-03 19:51:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:21,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:21,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:21,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988447735] [2022-03-03 19:51:21,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988447735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:21,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730537581] [2022-03-03 19:51:21,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:51:21,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:21,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:21,223 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) [2022-03-03 19:51:21,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:51:21,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:51:21,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:21,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:21,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:21,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:21,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730537581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:21,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:21,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:51:21,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128269366] [2022-03-03 19:51:21,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:21,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:51:21,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:21,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:51:21,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:51:21,436 INFO L87 Difference]: Start difference. First operand 3938 states and 13537 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) [2022-03-03 19:51:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:22,365 INFO L93 Difference]: Finished difference Result 7155 states and 23290 transitions. [2022-03-03 19:51:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:51:22,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) Word has length 27 [2022-03-03 19:51:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:22,379 INFO L225 Difference]: With dead ends: 7155 [2022-03-03 19:51:22,379 INFO L226 Difference]: Without dead ends: 7151 [2022-03-03 19:51:22,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 19:51:22,380 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 454 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:22,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 228 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:51:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2022-03-03 19:51:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 3936. [2022-03-03 19:51:22,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3936 states, 3935 states have (on average 3.4373570520965693) internal successors, (13526), 3935 states have internal predecessors, (13526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3936 states to 3936 states and 13526 transitions. [2022-03-03 19:51:22,492 INFO L78 Accepts]: Start accepts. Automaton has 3936 states and 13526 transitions. Word has length 27 [2022-03-03 19:51:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:22,492 INFO L470 AbstractCegarLoop]: Abstraction has 3936 states and 13526 transitions. [2022-03-03 19:51:22,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) [2022-03-03 19:51:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3936 states and 13526 transitions. [2022-03-03 19:51:22,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:22,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:22,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:22,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-03 19:51:22,698 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 [2022-03-03 19:51:22,698 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:22,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:22,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1484841794, now seen corresponding path program 33 times [2022-03-03 19:51:22,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:22,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457411337] [2022-03-03 19:51:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:22,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:22,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:22,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457411337] [2022-03-03 19:51:22,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457411337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:22,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568290932] [2022-03-03 19:51:22,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:51:22,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:22,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:22,742 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) [2022-03-03 19:51:22,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:51:22,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:51:22,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:22,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:51:22,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:22,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:22,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568290932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:22,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:22,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:51:22,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885798934] [2022-03-03 19:51:22,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:22,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:51:22,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:22,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:51:22,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:51:22,929 INFO L87 Difference]: Start difference. First operand 3936 states and 13526 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:23,594 INFO L93 Difference]: Finished difference Result 6859 states and 22528 transitions. [2022-03-03 19:51:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:51:23,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:51:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:23,606 INFO L225 Difference]: With dead ends: 6859 [2022-03-03 19:51:23,606 INFO L226 Difference]: Without dead ends: 6843 [2022-03-03 19:51:23,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:51:23,607 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 357 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:23,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 178 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:51:23,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6843 states. [2022-03-03 19:51:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6843 to 3932. [2022-03-03 19:51:23,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3931 states have (on average 3.435766980412109) internal successors, (13506), 3931 states have internal predecessors, (13506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 13506 transitions. [2022-03-03 19:51:23,683 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 13506 transitions. Word has length 27 [2022-03-03 19:51:23,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:23,683 INFO L470 AbstractCegarLoop]: Abstraction has 3932 states and 13506 transitions. [2022-03-03 19:51:23,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 13506 transitions. [2022-03-03 19:51:23,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:23,689 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:23,689 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:23,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-03 19:51:23,889 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 [2022-03-03 19:51:23,889 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:23,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:23,890 INFO L85 PathProgramCache]: Analyzing trace with hash -351559020, now seen corresponding path program 4 times [2022-03-03 19:51:23,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:23,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115570736] [2022-03-03 19:51:23,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:23,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:24,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:24,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115570736] [2022-03-03 19:51:24,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115570736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:24,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370563252] [2022-03-03 19:51:24,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:51:24,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:24,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:24,254 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) [2022-03-03 19:51:24,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:51:24,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:51:24,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:24,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:51:24,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:24,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:24,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:24,665 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 31 treesize of output 23 [2022-03-03 19:51:24,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:24,668 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:51:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:24,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:24,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:24,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:24,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 68 [2022-03-03 19:51:24,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:25,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:25,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-03 19:51:25,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:25,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:25,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:25,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:51:25,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:25,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:25,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:25,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:51:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:25,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370563252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:25,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:25,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-03 19:51:25,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897125056] [2022-03-03 19:51:25,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:25,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:51:25,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:25,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:51:25,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:51:25,642 INFO L87 Difference]: Start difference. First operand 3932 states and 13506 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:29,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:29,944 INFO L93 Difference]: Finished difference Result 8329 states and 25902 transitions. [2022-03-03 19:51:29,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:51:29,944 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:51:29,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:29,958 INFO L225 Difference]: With dead ends: 8329 [2022-03-03 19:51:29,958 INFO L226 Difference]: Without dead ends: 8299 [2022-03-03 19:51:29,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2640 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1360, Invalid=6296, Unknown=0, NotChecked=0, Total=7656 [2022-03-03 19:51:29,960 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 732 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:29,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 409 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:51:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8299 states. [2022-03-03 19:51:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8299 to 4021. [2022-03-03 19:51:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4021 states, 4020 states have (on average 3.435820895522388) internal successors, (13812), 4020 states have internal predecessors, (13812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:30,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4021 states to 4021 states and 13812 transitions. [2022-03-03 19:51:30,045 INFO L78 Accepts]: Start accepts. Automaton has 4021 states and 13812 transitions. Word has length 30 [2022-03-03 19:51:30,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:30,045 INFO L470 AbstractCegarLoop]: Abstraction has 4021 states and 13812 transitions. [2022-03-03 19:51:30,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:30,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4021 states and 13812 transitions. [2022-03-03 19:51:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:30,052 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:30,052 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:30,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-03 19:51:30,252 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 [2022-03-03 19:51:30,252 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:30,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1818932088, now seen corresponding path program 5 times [2022-03-03 19:51:30,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:30,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580175306] [2022-03-03 19:51:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:30,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:30,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:30,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580175306] [2022-03-03 19:51:30,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580175306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:30,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873880769] [2022-03-03 19:51:30,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:51:30,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:30,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:30,578 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) [2022-03-03 19:51:30,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 19:51:30,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:51:30,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:30,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:51:30,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:31,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:31,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:31,032 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 36 treesize of output 28 [2022-03-03 19:51:31,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:31,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-03 19:51:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:31,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:31,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:31,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:31,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 19:51:31,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:31,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:31,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:51:31,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:31,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:31,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:31,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:51:31,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:31,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:31,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:31,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:51:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:32,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873880769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:32,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:32,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-03-03 19:51:32,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407167256] [2022-03-03 19:51:32,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:32,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:51:32,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:32,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:51:32,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:51:32,059 INFO L87 Difference]: Start difference. First operand 4021 states and 13812 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:37,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:37,803 INFO L93 Difference]: Finished difference Result 8680 states and 26713 transitions. [2022-03-03 19:51:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 19:51:37,803 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:51:37,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:37,817 INFO L225 Difference]: With dead ends: 8680 [2022-03-03 19:51:37,817 INFO L226 Difference]: Without dead ends: 8635 [2022-03-03 19:51:37,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3605 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1623, Invalid=9297, Unknown=0, NotChecked=0, Total=10920 [2022-03-03 19:51:37,818 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 642 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 2786 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 2998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:37,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 610 Invalid, 2998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2786 Invalid, 0 Unknown, 36 Unchecked, 1.5s Time] [2022-03-03 19:51:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8635 states. [2022-03-03 19:51:37,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8635 to 4035. [2022-03-03 19:51:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 4034 states have (on average 3.4338125929598413) internal successors, (13852), 4034 states have internal predecessors, (13852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:37,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 13852 transitions. [2022-03-03 19:51:37,902 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 13852 transitions. Word has length 30 [2022-03-03 19:51:37,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:37,903 INFO L470 AbstractCegarLoop]: Abstraction has 4035 states and 13852 transitions. [2022-03-03 19:51:37,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:37,903 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 13852 transitions. [2022-03-03 19:51:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:37,908 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:37,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:37,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:38,108 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 [2022-03-03 19:51:38,109 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:38,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:38,109 INFO L85 PathProgramCache]: Analyzing trace with hash 924875788, now seen corresponding path program 6 times [2022-03-03 19:51:38,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:38,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886543044] [2022-03-03 19:51:38,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:38,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:38,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:38,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886543044] [2022-03-03 19:51:38,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886543044] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:38,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054840239] [2022-03-03 19:51:38,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:51:38,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:38,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:38,493 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) [2022-03-03 19:51:38,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 19:51:38,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:51:38,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:38,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:51:38,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:38,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:38,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:38,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:38,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-03-03 19:51:38,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:38,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:38,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:38,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 26 [2022-03-03 19:51:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:39,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:39,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:39,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:39,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:39,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-03-03 19:51:39,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:39,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:39,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:39,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-03-03 19:51:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:39,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054840239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:39,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:39,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-03-03 19:51:39,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097163128] [2022-03-03 19:51:39,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:39,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:51:39,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:39,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:51:39,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:51:39,881 INFO L87 Difference]: Start difference. First operand 4035 states and 13852 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:49,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:49,215 INFO L93 Difference]: Finished difference Result 11498 states and 38537 transitions. [2022-03-03 19:51:49,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-03-03 19:51:49,215 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:51:49,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:49,236 INFO L225 Difference]: With dead ends: 11498 [2022-03-03 19:51:49,236 INFO L226 Difference]: Without dead ends: 11484 [2022-03-03 19:51:49,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12006 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2573, Invalid=29289, Unknown=0, NotChecked=0, Total=31862 [2022-03-03 19:51:49,238 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 522 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 2784 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 4633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1697 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:49,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 989 Invalid, 4633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2784 Invalid, 0 Unknown, 1697 Unchecked, 1.4s Time] [2022-03-03 19:51:49,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11484 states. [2022-03-03 19:51:49,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11484 to 4122. [2022-03-03 19:51:49,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4122 states, 4121 states have (on average 3.433875272991992) internal successors, (14151), 4121 states have internal predecessors, (14151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 14151 transitions. [2022-03-03 19:51:49,345 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 14151 transitions. Word has length 30 [2022-03-03 19:51:49,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:49,345 INFO L470 AbstractCegarLoop]: Abstraction has 4122 states and 14151 transitions. [2022-03-03 19:51:49,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:49,345 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 14151 transitions. [2022-03-03 19:51:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:49,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:49,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:49,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-03 19:51:49,551 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 [2022-03-03 19:51:49,551 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:49,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:49,552 INFO L85 PathProgramCache]: Analyzing trace with hash -575152710, now seen corresponding path program 7 times [2022-03-03 19:51:49,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:49,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999168582] [2022-03-03 19:51:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:49,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:49,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:49,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999168582] [2022-03-03 19:51:49,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999168582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:49,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359152167] [2022-03-03 19:51:49,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:51:49,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:49,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:49,892 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) [2022-03-03 19:51:49,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 19:51:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:49,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:51:49,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:50,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:50,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:50,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-03 19:51:50,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:50,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:50,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-03 19:51:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:50,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:50,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:50,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:50,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 19:51:50,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:50,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:50,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:51:50,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:50,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:50,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:50,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:51:51,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:51,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:51,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:51,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:51:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:51,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359152167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:51,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:51,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 32 [2022-03-03 19:51:51,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6717043] [2022-03-03 19:51:51,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:51,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:51:51,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:51,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:51:51,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:51:51,250 INFO L87 Difference]: Start difference. First operand 4122 states and 14151 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:55,387 INFO L93 Difference]: Finished difference Result 8424 states and 26234 transitions. [2022-03-03 19:51:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 19:51:55,388 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:51:55,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:55,403 INFO L225 Difference]: With dead ends: 8424 [2022-03-03 19:51:55,404 INFO L226 Difference]: Without dead ends: 8394 [2022-03-03 19:51:55,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2573 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1367, Invalid=6115, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 19:51:55,404 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 687 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:55,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 454 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2161 Invalid, 0 Unknown, 198 Unchecked, 1.2s Time] [2022-03-03 19:51:55,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8394 states. [2022-03-03 19:51:55,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8394 to 4114. [2022-03-03 19:51:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4114 states, 4113 states have (on average 3.4354485776805253) internal successors, (14130), 4113 states have internal predecessors, (14130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 14130 transitions. [2022-03-03 19:51:55,490 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 14130 transitions. Word has length 30 [2022-03-03 19:51:55,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:55,490 INFO L470 AbstractCegarLoop]: Abstraction has 4114 states and 14130 transitions. [2022-03-03 19:51:55,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 14130 transitions. [2022-03-03 19:51:55,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:55,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:55,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:55,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-03 19:51:55,697 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 [2022-03-03 19:51:55,698 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:55,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:55,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2126312130, now seen corresponding path program 8 times [2022-03-03 19:51:55,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:55,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082508842] [2022-03-03 19:51:55,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:55,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:56,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:56,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082508842] [2022-03-03 19:51:56,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082508842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:56,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512810828] [2022-03-03 19:51:56,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:51:56,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:56,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:56,041 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) [2022-03-03 19:51:56,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 19:51:56,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:51:56,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:56,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:51:56,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:56,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:56,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:56,459 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 31 treesize of output 23 [2022-03-03 19:51:56,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:56,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:51:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:56,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:56,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:56,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:56,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 19:51:56,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:56,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:56,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:51:57,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:57,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:57,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:57,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:51:57,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:57,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:57,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:57,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:51:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:57,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512810828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:57,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:57,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-03 19:51:57,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341004818] [2022-03-03 19:51:57,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:57,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:51:57,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:57,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:51:57,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:51:57,441 INFO L87 Difference]: Start difference. First operand 4114 states and 14130 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:01,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:01,241 INFO L93 Difference]: Finished difference Result 8384 states and 26123 transitions. [2022-03-03 19:52:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 19:52:01,241 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:52:01,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:01,257 INFO L225 Difference]: With dead ends: 8384 [2022-03-03 19:52:01,257 INFO L226 Difference]: Without dead ends: 8369 [2022-03-03 19:52:01,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1326, Invalid=5646, Unknown=0, NotChecked=0, Total=6972 [2022-03-03 19:52:01,258 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 787 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:01,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 345 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1601 Invalid, 0 Unknown, 183 Unchecked, 0.9s Time] [2022-03-03 19:52:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8369 states. [2022-03-03 19:52:01,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8369 to 4108. [2022-03-03 19:52:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4108 states, 4107 states have (on average 3.436571706841977) internal successors, (14114), 4107 states have internal predecessors, (14114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4108 states to 4108 states and 14114 transitions. [2022-03-03 19:52:01,342 INFO L78 Accepts]: Start accepts. Automaton has 4108 states and 14114 transitions. Word has length 30 [2022-03-03 19:52:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:01,342 INFO L470 AbstractCegarLoop]: Abstraction has 4108 states and 14114 transitions. [2022-03-03 19:52:01,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4108 states and 14114 transitions. [2022-03-03 19:52:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:01,348 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:01,348 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:01,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:01,549 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 [2022-03-03 19:52:01,549 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:01,549 INFO L85 PathProgramCache]: Analyzing trace with hash 568392223, now seen corresponding path program 34 times [2022-03-03 19:52:01,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:01,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401779661] [2022-03-03 19:52:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:01,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:02,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:02,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401779661] [2022-03-03 19:52:02,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401779661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:02,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87239097] [2022-03-03 19:52:02,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:52:02,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:02,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:02,029 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) [2022-03-03 19:52:02,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 19:52:02,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:52:02,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:02,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:52:02,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:02,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:02,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:02,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:02,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-03 19:52:02,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:02,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:02,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:02,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2022-03-03 19:52:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:02,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:02,738 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:02,739 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 38 treesize of output 63 [2022-03-03 19:52:02,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:02,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:02,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:02,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-03 19:52:02,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:02,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:02,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:02,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:52:02,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:02,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:02,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:02,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 19:52:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:02,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87239097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:02,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:02,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-03-03 19:52:02,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146045085] [2022-03-03 19:52:02,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:02,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:52:02,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:02,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:52:02,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:52:02,967 INFO L87 Difference]: Start difference. First operand 4108 states and 14114 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:10,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:10,808 INFO L93 Difference]: Finished difference Result 7526 states and 24784 transitions. [2022-03-03 19:52:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-03 19:52:10,808 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:52:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:10,821 INFO L225 Difference]: With dead ends: 7526 [2022-03-03 19:52:10,821 INFO L226 Difference]: Without dead ends: 7479 [2022-03-03 19:52:10,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5574 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2059, Invalid=14197, Unknown=0, NotChecked=0, Total=16256 [2022-03-03 19:52:10,822 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 495 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 2941 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 3255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 2941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:10,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 483 Invalid, 3255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 2941 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:52:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7479 states. [2022-03-03 19:52:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7479 to 4187. [2022-03-03 19:52:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4187 states, 4186 states have (on average 3.4257047300525563) internal successors, (14340), 4186 states have internal predecessors, (14340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:10,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4187 states to 4187 states and 14340 transitions. [2022-03-03 19:52:10,906 INFO L78 Accepts]: Start accepts. Automaton has 4187 states and 14340 transitions. Word has length 30 [2022-03-03 19:52:10,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:10,906 INFO L470 AbstractCegarLoop]: Abstraction has 4187 states and 14340 transitions. [2022-03-03 19:52:10,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:10,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4187 states and 14340 transitions. [2022-03-03 19:52:10,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:10,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:10,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:10,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-03 19:52:11,130 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 [2022-03-03 19:52:11,130 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:11,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:11,130 INFO L85 PathProgramCache]: Analyzing trace with hash 757290426, now seen corresponding path program 9 times [2022-03-03 19:52:11,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:11,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71831141] [2022-03-03 19:52:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:11,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:11,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:11,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71831141] [2022-03-03 19:52:11,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71831141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:11,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651092831] [2022-03-03 19:52:11,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:52:11,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:11,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:11,475 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) [2022-03-03 19:52:11,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 19:52:11,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:52:11,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:11,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:52:11,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:11,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:11,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:11,903 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 40 treesize of output 32 [2022-03-03 19:52:11,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:11,906 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:52:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:11,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:12,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:12,289 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 60 treesize of output 93 [2022-03-03 19:52:12,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:12,316 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 77 [2022-03-03 19:52:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:13,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651092831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:13,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:13,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-03 19:52:13,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979453696] [2022-03-03 19:52:13,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:13,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:52:13,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:13,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:52:13,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:52:13,524 INFO L87 Difference]: Start difference. First operand 4187 states and 14340 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:17,889 INFO L93 Difference]: Finished difference Result 8543 states and 26702 transitions. [2022-03-03 19:52:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-03 19:52:17,889 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:52:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:17,906 INFO L225 Difference]: With dead ends: 8543 [2022-03-03 19:52:17,906 INFO L226 Difference]: Without dead ends: 8529 [2022-03-03 19:52:17,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 41 SyntacticMatches, 16 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3020 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1404, Invalid=5736, Unknown=0, NotChecked=0, Total=7140 [2022-03-03 19:52:17,906 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 615 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 555 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:17,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 439 Invalid, 1964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1197 Invalid, 0 Unknown, 555 Unchecked, 0.7s Time] [2022-03-03 19:52:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8529 states. [2022-03-03 19:52:17,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8529 to 4221. [2022-03-03 19:52:17,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4221 states, 4220 states have (on average 3.427962085308057) internal successors, (14466), 4220 states have internal predecessors, (14466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4221 states to 4221 states and 14466 transitions. [2022-03-03 19:52:17,992 INFO L78 Accepts]: Start accepts. Automaton has 4221 states and 14466 transitions. Word has length 30 [2022-03-03 19:52:17,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:17,992 INFO L470 AbstractCegarLoop]: Abstraction has 4221 states and 14466 transitions. [2022-03-03 19:52:17,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4221 states and 14466 transitions. [2022-03-03 19:52:17,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:17,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:17,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:18,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-03 19:52:18,199 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 [2022-03-03 19:52:18,200 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:18,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:18,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1555957713, now seen corresponding path program 35 times [2022-03-03 19:52:18,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:18,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418655162] [2022-03-03 19:52:18,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:18,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:18,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:18,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418655162] [2022-03-03 19:52:18,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418655162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:18,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937925641] [2022-03-03 19:52:18,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:52:18,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:18,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:18,663 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) [2022-03-03 19:52:18,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 19:52:18,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:52:18,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:18,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:52:18,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:19,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:19,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:19,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:19,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-03 19:52:19,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:19,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:19,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:19,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2022-03-03 19:52:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:19,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:19,413 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:19,413 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 38 treesize of output 63 [2022-03-03 19:52:19,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:19,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:19,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:19,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-03 19:52:19,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:19,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:19,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:19,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:52:19,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:19,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:19,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:19,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 19:52:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:19,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937925641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:19,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:19,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-03-03 19:52:19,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553552607] [2022-03-03 19:52:19,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:19,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:52:19,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:19,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:52:19,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:52:19,625 INFO L87 Difference]: Start difference. First operand 4221 states and 14466 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:36,693 INFO L93 Difference]: Finished difference Result 9601 states and 31192 transitions. [2022-03-03 19:52:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-03-03 19:52:36,693 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:52:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:36,712 INFO L225 Difference]: With dead ends: 9601 [2022-03-03 19:52:36,712 INFO L226 Difference]: Without dead ends: 9554 [2022-03-03 19:52:36,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15147 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=5253, Invalid=32577, Unknown=0, NotChecked=0, Total=37830 [2022-03-03 19:52:36,714 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 839 mSDsluCounter, 1849 mSDsCounter, 0 mSdLazyCounter, 5020 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 5687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 5020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:36,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 959 Invalid, 5687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 5020 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-03 19:52:36,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9554 states. [2022-03-03 19:52:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9554 to 4250. [2022-03-03 19:52:36,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 3.4304542245234173) internal successors, (14576), 4249 states have internal predecessors, (14576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 14576 transitions. [2022-03-03 19:52:36,842 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 14576 transitions. Word has length 30 [2022-03-03 19:52:36,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:36,842 INFO L470 AbstractCegarLoop]: Abstraction has 4250 states and 14576 transitions. [2022-03-03 19:52:36,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:36,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 14576 transitions. [2022-03-03 19:52:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:36,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:36,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:36,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:37,063 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 [2022-03-03 19:52:37,063 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:37,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1067437025, now seen corresponding path program 36 times [2022-03-03 19:52:37,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:37,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743637513] [2022-03-03 19:52:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:37,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:37,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:37,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743637513] [2022-03-03 19:52:37,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743637513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:37,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786733870] [2022-03-03 19:52:37,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:52:37,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:37,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:37,463 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) [2022-03-03 19:52:37,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 19:52:37,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:52:37,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:37,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:52:37,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:37,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:37,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:37,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:37,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:37,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-03-03 19:52:37,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:37,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:37,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:37,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:37,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 113 [2022-03-03 19:52:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:37,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:38,269 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:38,270 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 38 treesize of output 63 [2022-03-03 19:52:38,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:38,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:38,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:38,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-03 19:52:38,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:38,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:38,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:38,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:52:38,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:38,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:38,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:38,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 19:52:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:38,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786733870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:38,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:38,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 32 [2022-03-03 19:52:38,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358800193] [2022-03-03 19:52:38,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:38,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:52:38,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:52:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:52:38,468 INFO L87 Difference]: Start difference. First operand 4250 states and 14576 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:26,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:26,183 INFO L93 Difference]: Finished difference Result 16610 states and 52058 transitions. [2022-03-03 19:53:26,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 507 states. [2022-03-03 19:53:26,184 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:53:26,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:26,217 INFO L225 Difference]: With dead ends: 16610 [2022-03-03 19:53:26,217 INFO L226 Difference]: Without dead ends: 16541 [2022-03-03 19:53:26,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 528 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128956 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=22921, Invalid=257449, Unknown=0, NotChecked=0, Total=280370 [2022-03-03 19:53:26,229 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 1751 mSDsluCounter, 3662 mSDsCounter, 0 mSdLazyCounter, 9768 mSolverCounterSat, 1135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1751 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 10903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1135 IncrementalHoareTripleChecker+Valid, 9768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:26,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1751 Valid, 2177 Invalid, 10903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1135 Valid, 9768 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-03-03 19:53:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16541 states. [2022-03-03 19:53:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16541 to 4659. [2022-03-03 19:53:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 3.4257191927866035) internal successors, (15957), 4658 states have internal predecessors, (15957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 15957 transitions. [2022-03-03 19:53:26,427 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 15957 transitions. Word has length 30 [2022-03-03 19:53:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:26,427 INFO L470 AbstractCegarLoop]: Abstraction has 4659 states and 15957 transitions. [2022-03-03 19:53:26,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:26,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 15957 transitions. [2022-03-03 19:53:26,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:26,434 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:26,434 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:26,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-03 19:53:26,635 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 [2022-03-03 19:53:26,635 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:53:26,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:26,636 INFO L85 PathProgramCache]: Analyzing trace with hash 602852908, now seen corresponding path program 10 times [2022-03-03 19:53:26,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:26,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042289500] [2022-03-03 19:53:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:26,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:26,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:26,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042289500] [2022-03-03 19:53:26,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042289500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:26,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94946238] [2022-03-03 19:53:26,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:53:26,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:26,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:26,982 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) [2022-03-03 19:53:26,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 19:53:27,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:53:27,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:27,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:53:27,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:27,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:27,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:27,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-03 19:53:27,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:27,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:27,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-03-03 19:53:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:27,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:27,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:27,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:27,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 19:53:27,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:27,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:27,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:53:27,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:27,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:28,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:28,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:53:28,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:28,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:28,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:28,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:53:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:28,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94946238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:28,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:28,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 32 [2022-03-03 19:53:28,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900843999] [2022-03-03 19:53:28,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:28,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:53:28,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:28,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:53:28,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:53:28,340 INFO L87 Difference]: Start difference. First operand 4659 states and 15957 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:33,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:33,727 INFO L93 Difference]: Finished difference Result 9848 states and 30439 transitions. [2022-03-03 19:53:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-03 19:53:33,728 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:53:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:33,747 INFO L225 Difference]: With dead ends: 9848 [2022-03-03 19:53:33,747 INFO L226 Difference]: Without dead ends: 9818 [2022-03-03 19:53:33,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3791 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1927, Invalid=8579, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 19:53:33,748 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 872 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 2106 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 2106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:33,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 426 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 2106 Invalid, 0 Unknown, 91 Unchecked, 1.2s Time] [2022-03-03 19:53:33,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9818 states. [2022-03-03 19:53:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9818 to 4649. [2022-03-03 19:53:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4648 states have (on average 3.4242685025817554) internal successors, (15916), 4648 states have internal predecessors, (15916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:33,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 15916 transitions. [2022-03-03 19:53:33,864 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 15916 transitions. Word has length 30 [2022-03-03 19:53:33,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:33,864 INFO L470 AbstractCegarLoop]: Abstraction has 4649 states and 15916 transitions. [2022-03-03 19:53:33,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:33,864 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 15916 transitions. [2022-03-03 19:53:33,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:33,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:33,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:33,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:34,071 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 [2022-03-03 19:53:34,072 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:53:34,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:34,072 INFO L85 PathProgramCache]: Analyzing trace with hash -92028696, now seen corresponding path program 11 times [2022-03-03 19:53:34,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:34,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912263541] [2022-03-03 19:53:34,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:34,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:34,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:34,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912263541] [2022-03-03 19:53:34,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912263541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:34,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968362627] [2022-03-03 19:53:34,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:53:34,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:34,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:34,444 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) [2022-03-03 19:53:34,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 19:53:34,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:53:34,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:34,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:53:34,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:34,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:34,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:34,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-03 19:53:34,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-03-03 19:53:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:34,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:35,159 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:53:35,159 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 69 [2022-03-03 19:53:35,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:35,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:35,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:53:35,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:35,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:35,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:35,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:53:35,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:35,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:35,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:35,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:53:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:35,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968362627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:35,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:35,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-03 19:53:35,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949405414] [2022-03-03 19:53:35,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:35,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:53:35,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:35,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:53:35,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:53:35,759 INFO L87 Difference]: Start difference. First operand 4649 states and 15916 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:43,278 INFO L93 Difference]: Finished difference Result 9928 states and 31296 transitions. [2022-03-03 19:53:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-03 19:53:43,278 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:53:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:43,299 INFO L225 Difference]: With dead ends: 9928 [2022-03-03 19:53:43,299 INFO L226 Difference]: Without dead ends: 9869 [2022-03-03 19:53:43,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4529 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1655, Invalid=11917, Unknown=0, NotChecked=0, Total=13572 [2022-03-03 19:53:43,300 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 721 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 2964 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 3827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 2964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 653 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:43,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 697 Invalid, 3827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 2964 Invalid, 0 Unknown, 653 Unchecked, 1.7s Time] [2022-03-03 19:53:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9869 states. [2022-03-03 19:53:43,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9869 to 4696. [2022-03-03 19:53:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4696 states, 4695 states have (on average 3.428541001064963) internal successors, (16097), 4695 states have internal predecessors, (16097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4696 states to 4696 states and 16097 transitions. [2022-03-03 19:53:43,419 INFO L78 Accepts]: Start accepts. Automaton has 4696 states and 16097 transitions. Word has length 30 [2022-03-03 19:53:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:43,419 INFO L470 AbstractCegarLoop]: Abstraction has 4696 states and 16097 transitions. [2022-03-03 19:53:43,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 4696 states and 16097 transitions. [2022-03-03 19:53:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:43,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:43,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:43,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-03 19:53:43,627 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 [2022-03-03 19:53:43,627 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:53:43,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:43,627 INFO L85 PathProgramCache]: Analyzing trace with hash 112845316, now seen corresponding path program 12 times [2022-03-03 19:53:43,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:43,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712543728] [2022-03-03 19:53:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:43,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:44,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:44,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712543728] [2022-03-03 19:53:44,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712543728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:44,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767671069] [2022-03-03 19:53:44,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:53:44,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:44,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:44,011 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) [2022-03-03 19:53:44,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 19:53:44,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:53:44,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:44,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:53:44,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:44,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:44,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:44,531 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 40 treesize of output 32 [2022-03-03 19:53:44,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:44,535 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:53:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:44,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:44,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:44,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:44,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 68 [2022-03-03 19:53:44,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:44,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:44,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-03 19:53:45,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:45,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:45,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:45,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:53:45,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:45,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:45,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:45,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:53:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:45,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767671069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:45,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:45,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-03 19:53:45,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596167940] [2022-03-03 19:53:45,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:45,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:53:45,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:45,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:53:45,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:53:45,464 INFO L87 Difference]: Start difference. First operand 4696 states and 16097 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:50,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:50,149 INFO L93 Difference]: Finished difference Result 8928 states and 28034 transitions. [2022-03-03 19:53:50,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 19:53:50,149 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:53:50,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:50,167 INFO L225 Difference]: With dead ends: 8928 [2022-03-03 19:53:50,167 INFO L226 Difference]: Without dead ends: 8898 [2022-03-03 19:53:50,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1511, Invalid=7231, Unknown=0, NotChecked=0, Total=8742 [2022-03-03 19:53:50,168 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 580 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 2443 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:50,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 407 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2443 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:53:50,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8898 states. [2022-03-03 19:53:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8898 to 4722. [2022-03-03 19:53:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4722 states, 4721 states have (on average 3.4257572548188944) internal successors, (16173), 4721 states have internal predecessors, (16173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4722 states to 4722 states and 16173 transitions. [2022-03-03 19:53:50,271 INFO L78 Accepts]: Start accepts. Automaton has 4722 states and 16173 transitions. Word has length 30 [2022-03-03 19:53:50,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:50,271 INFO L470 AbstractCegarLoop]: Abstraction has 4722 states and 16173 transitions. [2022-03-03 19:53:50,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:50,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4722 states and 16173 transitions. [2022-03-03 19:53:50,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:50,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:50,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:50,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-03 19:53:50,479 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 [2022-03-03 19:53:50,479 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:53:50,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:50,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1513260232, now seen corresponding path program 13 times [2022-03-03 19:53:50,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:50,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693887327] [2022-03-03 19:53:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:50,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:50,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:50,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693887327] [2022-03-03 19:53:50,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693887327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:50,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387869558] [2022-03-03 19:53:50,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:53:50,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:50,845 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) [2022-03-03 19:53:50,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 19:53:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:50,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:53:50,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:51,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:51,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:51,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-03 19:53:51,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:51,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:51,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-03 19:53:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:51,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:51,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:51,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:51,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 19:53:51,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:51,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:51,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:53:51,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:51,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:51,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:51,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:53:51,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:51,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:51,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:51,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:53:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:52,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387869558] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:52,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:52,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 32 [2022-03-03 19:53:52,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142392672] [2022-03-03 19:53:52,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:52,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:53:52,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:52,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:53:52,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:53:52,205 INFO L87 Difference]: Start difference. First operand 4722 states and 16173 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:56,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:56,530 INFO L93 Difference]: Finished difference Result 8815 states and 27750 transitions. [2022-03-03 19:53:56,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 19:53:56,531 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:53:56,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:56,548 INFO L225 Difference]: With dead ends: 8815 [2022-03-03 19:53:56,548 INFO L226 Difference]: Without dead ends: 8785 [2022-03-03 19:53:56,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1538, Invalid=7204, Unknown=0, NotChecked=0, Total=8742 [2022-03-03 19:53:56,549 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 580 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 2500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:56,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 407 Invalid, 2500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 2272 Invalid, 0 Unknown, 29 Unchecked, 1.2s Time] [2022-03-03 19:53:56,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2022-03-03 19:53:56,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 4729. [2022-03-03 19:53:56,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4729 states, 4728 states have (on average 3.425549915397631) internal successors, (16196), 4728 states have internal predecessors, (16196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4729 states to 4729 states and 16196 transitions. [2022-03-03 19:53:56,646 INFO L78 Accepts]: Start accepts. Automaton has 4729 states and 16196 transitions. Word has length 30 [2022-03-03 19:53:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:56,646 INFO L470 AbstractCegarLoop]: Abstraction has 4729 states and 16196 transitions. [2022-03-03 19:53:56,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:56,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4729 states and 16196 transitions. [2022-03-03 19:53:56,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:56,654 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:56,654 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:56,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:56,854 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 [2022-03-03 19:53:56,855 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:53:56,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:56,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1537927686, now seen corresponding path program 14 times [2022-03-03 19:53:56,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:56,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692666835] [2022-03-03 19:53:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:56,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:57,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:57,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692666835] [2022-03-03 19:53:57,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692666835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:57,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511154169] [2022-03-03 19:53:57,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:53:57,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:57,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:57,243 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) [2022-03-03 19:53:57,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 19:53:57,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:53:57,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:57,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:53:57,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:57,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:57,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:57,684 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 40 treesize of output 32 [2022-03-03 19:53:57,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:57,686 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:53:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:57,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:57,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:57,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:57,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 19:53:57,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:58,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:58,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:53:58,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:58,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:58,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:58,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:53:58,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:58,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:58,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:58,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:53:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:58,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511154169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:58,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:58,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-03 19:53:58,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121411219] [2022-03-03 19:53:58,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:58,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:53:58,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:58,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:53:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:53:58,689 INFO L87 Difference]: Start difference. First operand 4729 states and 16196 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:02,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:02,934 INFO L93 Difference]: Finished difference Result 8821 states and 27736 transitions. [2022-03-03 19:54:02,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 19:54:02,934 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:54:02,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:02,950 INFO L225 Difference]: With dead ends: 8821 [2022-03-03 19:54:02,950 INFO L226 Difference]: Without dead ends: 8807 [2022-03-03 19:54:02,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2885 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1492, Invalid=6698, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 19:54:02,951 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 578 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:02,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 338 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1923 Invalid, 0 Unknown, 34 Unchecked, 1.1s Time] [2022-03-03 19:54:02,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8807 states. [2022-03-03 19:54:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8807 to 4729. [2022-03-03 19:54:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4729 states, 4728 states have (on average 3.425549915397631) internal successors, (16196), 4728 states have internal predecessors, (16196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4729 states to 4729 states and 16196 transitions. [2022-03-03 19:54:03,045 INFO L78 Accepts]: Start accepts. Automaton has 4729 states and 16196 transitions. Word has length 30 [2022-03-03 19:54:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:03,045 INFO L470 AbstractCegarLoop]: Abstraction has 4729 states and 16196 transitions. [2022-03-03 19:54:03,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4729 states and 16196 transitions. [2022-03-03 19:54:03,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:03,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:03,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:03,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:03,252 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 [2022-03-03 19:54:03,252 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:03,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1205880190, now seen corresponding path program 15 times [2022-03-03 19:54:03,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:03,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292210952] [2022-03-03 19:54:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:03,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:03,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:03,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292210952] [2022-03-03 19:54:03,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292210952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:03,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488832113] [2022-03-03 19:54:03,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:54:03,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:03,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:03,600 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) [2022-03-03 19:54:03,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 19:54:03,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:54:03,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:54:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:04,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:04,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:04,082 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 31 treesize of output 23 [2022-03-03 19:54:04,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:04,098 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:54:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:04,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:04,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:04,471 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 60 treesize of output 93 [2022-03-03 19:54:04,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:04,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2022-03-03 19:54:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:05,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488832113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:05,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:05,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-03 19:54:05,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336123922] [2022-03-03 19:54:05,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:05,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:54:05,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:05,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:54:05,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:54:05,703 INFO L87 Difference]: Start difference. First operand 4729 states and 16196 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:09,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:09,016 INFO L93 Difference]: Finished difference Result 8618 states and 27320 transitions. [2022-03-03 19:54:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:54:09,018 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:54:09,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:09,036 INFO L225 Difference]: With dead ends: 8618 [2022-03-03 19:54:09,037 INFO L226 Difference]: Without dead ends: 8603 [2022-03-03 19:54:09,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1221, Invalid=5259, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:54:09,038 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 405 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 2104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 794 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:09,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 384 Invalid, 2104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1177 Invalid, 0 Unknown, 794 Unchecked, 0.7s Time] [2022-03-03 19:54:09,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8603 states. [2022-03-03 19:54:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8603 to 4707. [2022-03-03 19:54:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4707 states, 4706 states have (on average 3.4271143221419464) internal successors, (16128), 4706 states have internal predecessors, (16128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4707 states to 4707 states and 16128 transitions. [2022-03-03 19:54:09,181 INFO L78 Accepts]: Start accepts. Automaton has 4707 states and 16128 transitions. Word has length 30 [2022-03-03 19:54:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:09,182 INFO L470 AbstractCegarLoop]: Abstraction has 4707 states and 16128 transitions. [2022-03-03 19:54:09,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4707 states and 16128 transitions. [2022-03-03 19:54:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:09,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:09,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:09,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-03 19:54:09,389 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 [2022-03-03 19:54:09,389 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:09,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:09,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1894737772, now seen corresponding path program 16 times [2022-03-03 19:54:09,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:09,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889238522] [2022-03-03 19:54:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:09,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:09,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:09,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889238522] [2022-03-03 19:54:09,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889238522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:09,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162314367] [2022-03-03 19:54:09,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:54:09,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:09,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:09,756 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) [2022-03-03 19:54:09,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 19:54:09,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:54:09,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:09,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:54:09,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:10,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:10,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:10,209 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 49 treesize of output 41 [2022-03-03 19:54:10,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:10,211 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-03 19:54:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:10,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:10,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:10,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:10,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 68 [2022-03-03 19:54:10,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:10,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:10,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-03 19:54:10,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:10,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:10,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:10,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:54:10,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:10,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:10,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:10,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:54:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:11,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162314367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:11,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:11,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-03 19:54:11,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559777548] [2022-03-03 19:54:11,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:11,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:54:11,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:54:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:54:11,103 INFO L87 Difference]: Start difference. First operand 4707 states and 16128 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:16,934 INFO L93 Difference]: Finished difference Result 9415 states and 29580 transitions. [2022-03-03 19:54:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-03 19:54:16,935 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:54:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:16,952 INFO L225 Difference]: With dead ends: 9415 [2022-03-03 19:54:16,952 INFO L226 Difference]: Without dead ends: 9385 [2022-03-03 19:54:16,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4610 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2081, Invalid=10351, Unknown=0, NotChecked=0, Total=12432 [2022-03-03 19:54:16,953 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 742 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 2862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:16,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 457 Invalid, 2862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 2600 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 19:54:16,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9385 states. [2022-03-03 19:54:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9385 to 4740. [2022-03-03 19:54:17,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4740 states, 4739 states have (on average 3.4317366533023845) internal successors, (16263), 4739 states have internal predecessors, (16263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4740 states to 4740 states and 16263 transitions. [2022-03-03 19:54:17,054 INFO L78 Accepts]: Start accepts. Automaton has 4740 states and 16263 transitions. Word has length 30 [2022-03-03 19:54:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:17,055 INFO L470 AbstractCegarLoop]: Abstraction has 4740 states and 16263 transitions. [2022-03-03 19:54:17,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 4740 states and 16263 transitions. [2022-03-03 19:54:17,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:17,061 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:17,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:17,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:17,261 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 [2022-03-03 19:54:17,262 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:17,262 INFO L85 PathProgramCache]: Analyzing trace with hash -260258954, now seen corresponding path program 17 times [2022-03-03 19:54:17,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:17,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56351674] [2022-03-03 19:54:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:17,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:17,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:17,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56351674] [2022-03-03 19:54:17,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56351674] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:17,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279537791] [2022-03-03 19:54:17,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:54:17,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:17,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:17,640 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) [2022-03-03 19:54:17,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 19:54:17,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:54:17,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:17,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:54:17,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:18,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:18,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:18,035 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 40 treesize of output 32 [2022-03-03 19:54:18,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:18,038 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-03 19:54:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:18,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:18,386 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:54:18,386 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 69 [2022-03-03 19:54:18,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:18,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:18,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:54:18,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:18,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:18,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:18,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:54:18,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:18,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:18,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:18,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:54:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:18,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279537791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:18,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:18,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-03 19:54:18,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490234105] [2022-03-03 19:54:18,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:18,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:54:18,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:18,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:54:18,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:54:18,988 INFO L87 Difference]: Start difference. First operand 4740 states and 16263 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:27,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:27,447 INFO L93 Difference]: Finished difference Result 9485 states and 30401 transitions. [2022-03-03 19:54:27,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-03 19:54:27,447 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:54:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:27,465 INFO L225 Difference]: With dead ends: 9485 [2022-03-03 19:54:27,465 INFO L226 Difference]: Without dead ends: 9451 [2022-03-03 19:54:27,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4862 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1848, Invalid=12672, Unknown=0, NotChecked=0, Total=14520 [2022-03-03 19:54:27,467 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 680 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 3583 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 3853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 3583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:27,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 609 Invalid, 3853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 3583 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-03 19:54:27,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9451 states. [2022-03-03 19:54:27,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9451 to 4797. [2022-03-03 19:54:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4797 states, 4796 states have (on average 3.4307756463719765) internal successors, (16454), 4796 states have internal predecessors, (16454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4797 states to 4797 states and 16454 transitions. [2022-03-03 19:54:27,577 INFO L78 Accepts]: Start accepts. Automaton has 4797 states and 16454 transitions. Word has length 30 [2022-03-03 19:54:27,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:27,577 INFO L470 AbstractCegarLoop]: Abstraction has 4797 states and 16454 transitions. [2022-03-03 19:54:27,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:27,577 INFO L276 IsEmpty]: Start isEmpty. Operand 4797 states and 16454 transitions. [2022-03-03 19:54:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:27,585 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:27,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:27,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-03 19:54:27,785 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 [2022-03-03 19:54:27,786 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:27,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:27,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1369414922, now seen corresponding path program 18 times [2022-03-03 19:54:27,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:27,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41655158] [2022-03-03 19:54:27,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:27,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:28,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:28,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41655158] [2022-03-03 19:54:28,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41655158] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:28,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222232122] [2022-03-03 19:54:28,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:54:28,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:28,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:28,154 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:28,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 19:54:28,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:54:28,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:28,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:54:28,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:28,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:28,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:28,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2022-03-03 19:54:28,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:28,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:28,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 61 [2022-03-03 19:54:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:29,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:29,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:29,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:29,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:29,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-03-03 19:54:29,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:29,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:29,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:29,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-03-03 19:54:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:29,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222232122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:29,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:29,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-03-03 19:54:29,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624715791] [2022-03-03 19:54:29,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:29,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:54:29,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:29,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:54:29,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:54:29,841 INFO L87 Difference]: Start difference. First operand 4797 states and 16454 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 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) [2022-03-03 19:54:46,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:46,967 INFO L93 Difference]: Finished difference Result 15689 states and 52195 transitions. [2022-03-03 19:54:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2022-03-03 19:54:46,968 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 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) Word has length 30 [2022-03-03 19:54:46,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:47,004 INFO L225 Difference]: With dead ends: 15689 [2022-03-03 19:54:47,005 INFO L226 Difference]: Without dead ends: 15644 [2022-03-03 19:54:47,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20846 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=6531, Invalid=42975, Unknown=0, NotChecked=0, Total=49506 [2022-03-03 19:54:47,007 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 790 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 3715 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 7492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 3715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3563 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:47,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [790 Valid, 1161 Invalid, 7492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 3715 Invalid, 0 Unknown, 3563 Unchecked, 2.1s Time] [2022-03-03 19:54:47,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15644 states. [2022-03-03 19:54:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15644 to 4905. [2022-03-03 19:54:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 3.4404567699836868) internal successors, (16872), 4904 states have internal predecessors, (16872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 16872 transitions. [2022-03-03 19:54:47,173 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 16872 transitions. Word has length 30 [2022-03-03 19:54:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:47,173 INFO L470 AbstractCegarLoop]: Abstraction has 4905 states and 16872 transitions. [2022-03-03 19:54:47,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 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) [2022-03-03 19:54:47,173 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 16872 transitions. [2022-03-03 19:54:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:47,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:47,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:47,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-03 19:54:47,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:47,380 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:47,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash 436133214, now seen corresponding path program 19 times [2022-03-03 19:54:47,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:47,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992198121] [2022-03-03 19:54:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:47,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:47,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:47,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992198121] [2022-03-03 19:54:47,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992198121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:47,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122291422] [2022-03-03 19:54:47,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:54:47,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:47,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:47,757 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:47,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 19:54:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:47,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:54:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:48,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:48,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:48,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2022-03-03 19:54:48,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:48,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:48,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 26 [2022-03-03 19:54:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:48,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:48,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:48,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:48,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 19:54:48,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:48,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:48,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:54:48,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:48,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:48,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:48,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:54:48,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:48,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:48,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:48,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:54:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:49,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122291422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:49,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:49,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 31 [2022-03-03 19:54:49,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189061300] [2022-03-03 19:54:49,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:49,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:54:49,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:49,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:54:49,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:54:49,155 INFO L87 Difference]: Start difference. First operand 4905 states and 16872 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:55,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:55,257 INFO L93 Difference]: Finished difference Result 9970 states and 31516 transitions. [2022-03-03 19:54:55,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-03 19:54:55,258 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:54:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:55,278 INFO L225 Difference]: With dead ends: 9970 [2022-03-03 19:54:55,278 INFO L226 Difference]: Without dead ends: 9940 [2022-03-03 19:54:55,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2292, Invalid=10590, Unknown=0, NotChecked=0, Total=12882 [2022-03-03 19:54:55,279 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 807 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 2484 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 3200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 2484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:55,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 649 Invalid, 3200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 2484 Invalid, 0 Unknown, 388 Unchecked, 1.4s Time] [2022-03-03 19:54:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9940 states. [2022-03-03 19:54:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9940 to 4932. [2022-03-03 19:54:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4932 states, 4931 states have (on average 3.445548570269722) internal successors, (16990), 4931 states have internal predecessors, (16990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4932 states to 4932 states and 16990 transitions. [2022-03-03 19:54:55,418 INFO L78 Accepts]: Start accepts. Automaton has 4932 states and 16990 transitions. Word has length 30 [2022-03-03 19:54:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:55,419 INFO L470 AbstractCegarLoop]: Abstraction has 4932 states and 16990 transitions. [2022-03-03 19:54:55,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 4932 states and 16990 transitions. [2022-03-03 19:54:55,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:55,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:55,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:55,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-03 19:54:55,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:55,626 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash 608056734, now seen corresponding path program 20 times [2022-03-03 19:54:55,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:55,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009203880] [2022-03-03 19:54:55,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:55,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:56,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:56,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009203880] [2022-03-03 19:54:56,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009203880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:56,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570419000] [2022-03-03 19:54:56,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:54:56,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:56,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:56,003 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:56,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 19:54:56,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:54:56,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:56,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:54:56,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:56,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:56,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:56,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-03-03 19:54:56,303 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2022-03-03 19:54:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:56,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:56,713 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:54:56,713 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 69 [2022-03-03 19:54:56,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:56,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:56,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:54:57,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:57,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:57,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:57,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:54:57,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:57,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:57,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:57,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:54:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:57,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570419000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:57,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:57,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-03 19:54:57,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29113577] [2022-03-03 19:54:57,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:57,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:54:57,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:57,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:54:57,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:54:57,359 INFO L87 Difference]: Start difference. First operand 4932 states and 16990 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:05,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:05,425 INFO L93 Difference]: Finished difference Result 10167 states and 32691 transitions. [2022-03-03 19:55:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-03 19:55:05,426 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:55:05,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:05,447 INFO L225 Difference]: With dead ends: 10167 [2022-03-03 19:55:05,448 INFO L226 Difference]: Without dead ends: 10094 [2022-03-03 19:55:05,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4754 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1844, Invalid=12198, Unknown=0, NotChecked=0, Total=14042 [2022-03-03 19:55:05,449 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 644 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 3064 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 4031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 3064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 725 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:05,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 705 Invalid, 4031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 3064 Invalid, 0 Unknown, 725 Unchecked, 1.7s Time] [2022-03-03 19:55:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10094 states. [2022-03-03 19:55:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10094 to 4922. [2022-03-03 19:55:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4922 states, 4921 states have (on average 3.4450314976630767) internal successors, (16953), 4921 states have internal predecessors, (16953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4922 states to 4922 states and 16953 transitions. [2022-03-03 19:55:05,564 INFO L78 Accepts]: Start accepts. Automaton has 4922 states and 16953 transitions. Word has length 30 [2022-03-03 19:55:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:05,564 INFO L470 AbstractCegarLoop]: Abstraction has 4922 states and 16953 transitions. [2022-03-03 19:55:05,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4922 states and 16953 transitions. [2022-03-03 19:55:05,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:05,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:05,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:05,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-03 19:55:05,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:05,772 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:05,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:05,773 INFO L85 PathProgramCache]: Analyzing trace with hash -64309065, now seen corresponding path program 37 times [2022-03-03 19:55:05,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:05,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857860914] [2022-03-03 19:55:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:05,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:06,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:06,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857860914] [2022-03-03 19:55:06,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857860914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:06,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363709678] [2022-03-03 19:55:06,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:55:06,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:06,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:06,201 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:06,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 19:55:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:06,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:55:06,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:06,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:06,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:06,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:06,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2022-03-03 19:55:06,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:06,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:06,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:06,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-03-03 19:55:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:06,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:06,920 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:06,920 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 38 treesize of output 63 [2022-03-03 19:55:06,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:06,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:06,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:06,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-03 19:55:07,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:07,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:07,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:07,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:55:07,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:07,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:07,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:07,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 19:55:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:07,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363709678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:07,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:07,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-03-03 19:55:07,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336574698] [2022-03-03 19:55:07,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:07,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:55:07,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:07,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:55:07,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:55:07,124 INFO L87 Difference]: Start difference. First operand 4922 states and 16953 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:20,443 INFO L93 Difference]: Finished difference Result 8870 states and 29263 transitions. [2022-03-03 19:55:20,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-03 19:55:20,443 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:55:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:20,460 INFO L225 Difference]: With dead ends: 8870 [2022-03-03 19:55:20,460 INFO L226 Difference]: Without dead ends: 8823 [2022-03-03 19:55:20,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8817 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=3034, Invalid=20836, Unknown=0, NotChecked=0, Total=23870 [2022-03-03 19:55:20,461 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 661 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 3528 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 4067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 3528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:20,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 606 Invalid, 4067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 3528 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-03 19:55:20,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8823 states. [2022-03-03 19:55:20,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8823 to 4922. [2022-03-03 19:55:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4922 states, 4921 states have (on average 3.4450314976630767) internal successors, (16953), 4921 states have internal predecessors, (16953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4922 states to 4922 states and 16953 transitions. [2022-03-03 19:55:20,552 INFO L78 Accepts]: Start accepts. Automaton has 4922 states and 16953 transitions. Word has length 30 [2022-03-03 19:55:20,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:20,552 INFO L470 AbstractCegarLoop]: Abstraction has 4922 states and 16953 transitions. [2022-03-03 19:55:20,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:20,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4922 states and 16953 transitions. [2022-03-03 19:55:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:20,559 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:20,560 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:20,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:20,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-03 19:55:20,760 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:20,760 INFO L85 PathProgramCache]: Analyzing trace with hash -523918848, now seen corresponding path program 21 times [2022-03-03 19:55:20,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:20,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109698011] [2022-03-03 19:55:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:20,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:21,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:21,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109698011] [2022-03-03 19:55:21,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109698011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:21,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595062811] [2022-03-03 19:55:21,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:55:21,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:21,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:21,182 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:21,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 19:55:21,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:55:21,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:21,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:55:21,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:21,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:21,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:21,586 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 41 treesize of output 33 [2022-03-03 19:55:21,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:21,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:21,590 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 23 treesize of output 11 [2022-03-03 19:55:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:21,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:21,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:21,966 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 92 [2022-03-03 19:55:21,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:21,993 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 43 treesize of output 76 [2022-03-03 19:55:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:23,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595062811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:23,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:23,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-03 19:55:23,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241625325] [2022-03-03 19:55:23,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:23,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:55:23,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:23,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:55:23,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:55:23,004 INFO L87 Difference]: Start difference. First operand 4922 states and 16953 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:26,824 INFO L93 Difference]: Finished difference Result 9342 states and 29595 transitions. [2022-03-03 19:55:26,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 19:55:26,824 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:55:26,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:26,841 INFO L225 Difference]: With dead ends: 9342 [2022-03-03 19:55:26,841 INFO L226 Difference]: Without dead ends: 9285 [2022-03-03 19:55:26,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2993 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1313, Invalid=7059, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 19:55:26,842 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 486 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 2645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 665 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:26,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 417 Invalid, 2645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1792 Invalid, 0 Unknown, 665 Unchecked, 0.9s Time] [2022-03-03 19:55:26,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9285 states. [2022-03-03 19:55:26,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9285 to 4967. [2022-03-03 19:55:26,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4967 states, 4966 states have (on average 3.4440193314538865) internal successors, (17103), 4966 states have internal predecessors, (17103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4967 states to 4967 states and 17103 transitions. [2022-03-03 19:55:26,939 INFO L78 Accepts]: Start accepts. Automaton has 4967 states and 17103 transitions. Word has length 30 [2022-03-03 19:55:26,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:26,939 INFO L470 AbstractCegarLoop]: Abstraction has 4967 states and 17103 transitions. [2022-03-03 19:55:26,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:26,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4967 states and 17103 transitions. [2022-03-03 19:55:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:26,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:26,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:26,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-03 19:55:27,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-03-03 19:55:27,147 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:27,147 INFO L85 PathProgramCache]: Analyzing trace with hash -607240742, now seen corresponding path program 22 times [2022-03-03 19:55:27,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:27,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970586955] [2022-03-03 19:55:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:27,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:27,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:27,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970586955] [2022-03-03 19:55:27,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970586955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:27,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229476178] [2022-03-03 19:55:27,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:55:27,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:27,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:27,520 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:27,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 19:55:27,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:55:27,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:27,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:55:27,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:27,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:27,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:27,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-03-03 19:55:27,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:27,884 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 21 treesize of output 26 [2022-03-03 19:55:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:27,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:28,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:28,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:28,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 68 [2022-03-03 19:55:28,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:28,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:28,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-03 19:55:28,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:28,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:28,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:28,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:55:28,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:28,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:28,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:28,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:55:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:28,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229476178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:28,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:28,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-03 19:55:28,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642507504] [2022-03-03 19:55:28,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:28,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:55:28,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:28,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:55:28,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:55:28,808 INFO L87 Difference]: Start difference. First operand 4967 states and 17103 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:35,864 INFO L93 Difference]: Finished difference Result 10333 states and 32492 transitions. [2022-03-03 19:55:35,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-03 19:55:35,867 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:55:35,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:35,887 INFO L225 Difference]: With dead ends: 10333 [2022-03-03 19:55:35,888 INFO L226 Difference]: Without dead ends: 10238 [2022-03-03 19:55:35,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5490 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2237, Invalid=12769, Unknown=0, NotChecked=0, Total=15006 [2022-03-03 19:55:35,889 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 681 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 3069 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 3360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 3069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:35,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 565 Invalid, 3360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 3069 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:55:35,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10238 states. [2022-03-03 19:55:35,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10238 to 5005. [2022-03-03 19:55:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5005 states, 5004 states have (on average 3.447841726618705) internal successors, (17253), 5004 states have internal predecessors, (17253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5005 states to 5005 states and 17253 transitions. [2022-03-03 19:55:36,006 INFO L78 Accepts]: Start accepts. Automaton has 5005 states and 17253 transitions. Word has length 30 [2022-03-03 19:55:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:36,006 INFO L470 AbstractCegarLoop]: Abstraction has 5005 states and 17253 transitions. [2022-03-03 19:55:36,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5005 states and 17253 transitions. [2022-03-03 19:55:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:36,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:36,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:36,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-03 19:55:36,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-03 19:55:36,214 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:36,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:36,214 INFO L85 PathProgramCache]: Analyzing trace with hash -246142976, now seen corresponding path program 23 times [2022-03-03 19:55:36,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:36,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506172254] [2022-03-03 19:55:36,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:36,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:36,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:36,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506172254] [2022-03-03 19:55:36,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506172254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:36,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093815326] [2022-03-03 19:55:36,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:55:36,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:36,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:36,716 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:36,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 19:55:36,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:55:36,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:36,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:55:36,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:37,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:37,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:37,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:37,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:37,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:37,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2022-03-03 19:55:37,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:37,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:37,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:37,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:37,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:37,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2022-03-03 19:55:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:37,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:37,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:37,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:37,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 19:55:37,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:37,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:37,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:55:37,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:37,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:37,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:37,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:55:37,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:37,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:37,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:37,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:55:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:38,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093815326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:38,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:38,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-03 19:55:38,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983343395] [2022-03-03 19:55:38,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:38,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:55:38,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:38,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:55:38,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:55:38,078 INFO L87 Difference]: Start difference. First operand 5005 states and 17253 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:43,735 INFO L93 Difference]: Finished difference Result 9678 states and 30736 transitions. [2022-03-03 19:55:43,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-03 19:55:43,735 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:55:43,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:43,755 INFO L225 Difference]: With dead ends: 9678 [2022-03-03 19:55:43,755 INFO L226 Difference]: Without dead ends: 9528 [2022-03-03 19:55:43,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1743, Invalid=8763, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 19:55:43,756 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 614 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 2801 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:43,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 476 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2801 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:55:43,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9528 states. [2022-03-03 19:55:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9528 to 5028. [2022-03-03 19:55:43,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5028 states, 5027 states have (on average 3.448975532126517) internal successors, (17338), 5027 states have internal predecessors, (17338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:43,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5028 states to 5028 states and 17338 transitions. [2022-03-03 19:55:43,860 INFO L78 Accepts]: Start accepts. Automaton has 5028 states and 17338 transitions. Word has length 30 [2022-03-03 19:55:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:43,861 INFO L470 AbstractCegarLoop]: Abstraction has 5028 states and 17338 transitions. [2022-03-03 19:55:43,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:43,861 INFO L276 IsEmpty]: Start isEmpty. Operand 5028 states and 17338 transitions. [2022-03-03 19:55:43,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:43,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:43,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:43,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-03 19:55:44,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:44,068 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:44,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1083842874, now seen corresponding path program 24 times [2022-03-03 19:55:44,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:44,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409366818] [2022-03-03 19:55:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:44,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:44,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:44,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409366818] [2022-03-03 19:55:44,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409366818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:44,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421077062] [2022-03-03 19:55:44,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:55:44,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:44,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:44,469 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:44,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 19:55:44,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:55:44,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:44,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:55:44,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:44,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:44,874 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 48 [2022-03-03 19:55:44,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:44,883 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 52 [2022-03-03 19:55:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:45,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:45,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:45,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:45,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:45,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 61 [2022-03-03 19:55:45,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:45,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:45,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:45,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 51 [2022-03-03 19:55:45,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:45,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-03-03 19:55:45,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:45,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-03-03 19:55:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:45,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421077062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:45,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:45,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-03-03 19:55:45,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852837363] [2022-03-03 19:55:45,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:45,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 19:55:45,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:45,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 19:55:45,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:55:45,774 INFO L87 Difference]: Start difference. First operand 5028 states and 17338 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:50,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:50,672 INFO L93 Difference]: Finished difference Result 9618 states and 31388 transitions. [2022-03-03 19:55:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 19:55:50,673 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:55:50,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:50,693 INFO L225 Difference]: With dead ends: 9618 [2022-03-03 19:55:50,693 INFO L226 Difference]: Without dead ends: 9582 [2022-03-03 19:55:50,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1184, Invalid=7558, Unknown=0, NotChecked=0, Total=8742 [2022-03-03 19:55:50,694 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 665 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 3411 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 3653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 3411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:50,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 544 Invalid, 3653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 3411 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:55:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9582 states. [2022-03-03 19:55:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9582 to 5059. [2022-03-03 19:55:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5059 states, 5058 states have (on average 3.4499802293396598) internal successors, (17450), 5058 states have internal predecessors, (17450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5059 states to 5059 states and 17450 transitions. [2022-03-03 19:55:50,858 INFO L78 Accepts]: Start accepts. Automaton has 5059 states and 17450 transitions. Word has length 30 [2022-03-03 19:55:50,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:50,858 INFO L470 AbstractCegarLoop]: Abstraction has 5059 states and 17450 transitions. [2022-03-03 19:55:50,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:50,858 INFO L276 IsEmpty]: Start isEmpty. Operand 5059 states and 17450 transitions. [2022-03-03 19:55:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:50,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:50,865 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:50,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-03 19:55:51,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:51,066 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:51,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:51,066 INFO L85 PathProgramCache]: Analyzing trace with hash -86404540, now seen corresponding path program 25 times [2022-03-03 19:55:51,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:51,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811654690] [2022-03-03 19:55:51,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:51,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:51,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:51,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811654690] [2022-03-03 19:55:51,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811654690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:51,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7126473] [2022-03-03 19:55:51,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:55:51,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:51,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:51,456 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:51,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 19:55:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:51,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:55:51,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:51,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:51,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:51,852 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 36 treesize of output 28 [2022-03-03 19:55:51,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:51,864 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-03 19:55:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:51,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:52,201 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:55:52,202 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 33 treesize of output 68 [2022-03-03 19:55:52,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:52,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:52,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-03 19:55:52,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:52,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:52,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:52,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:55:52,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:52,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:52,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:52,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:55:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:52,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7126473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:52,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:52,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-03 19:55:52,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599739494] [2022-03-03 19:55:52,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:52,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:55:52,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:52,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:55:52,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:55:52,786 INFO L87 Difference]: Start difference. First operand 5059 states and 17450 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:56,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:56,315 INFO L93 Difference]: Finished difference Result 8969 states and 29168 transitions. [2022-03-03 19:55:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:55:56,315 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:55:56,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:56,332 INFO L225 Difference]: With dead ends: 8969 [2022-03-03 19:55:56,332 INFO L226 Difference]: Without dead ends: 8935 [2022-03-03 19:55:56,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=633, Invalid=5067, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 19:55:56,332 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 326 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 2814 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 2935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:56,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 468 Invalid, 2935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2814 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:55:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8935 states. [2022-03-03 19:55:56,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8935 to 5120. [2022-03-03 19:55:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5120 states, 5119 states have (on average 3.4506739597577654) internal successors, (17664), 5119 states have internal predecessors, (17664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:56,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5120 states to 5120 states and 17664 transitions. [2022-03-03 19:55:56,433 INFO L78 Accepts]: Start accepts. Automaton has 5120 states and 17664 transitions. Word has length 30 [2022-03-03 19:55:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:56,433 INFO L470 AbstractCegarLoop]: Abstraction has 5120 states and 17664 transitions. [2022-03-03 19:55:56,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:56,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5120 states and 17664 transitions. [2022-03-03 19:55:56,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:56,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:56,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:56,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-03 19:55:56,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-03 19:55:56,641 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:56,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1314010376, now seen corresponding path program 26 times [2022-03-03 19:55:56,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:56,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043225412] [2022-03-03 19:55:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:56,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:57,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:57,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043225412] [2022-03-03 19:55:57,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043225412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:57,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854528393] [2022-03-03 19:55:57,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:55:57,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:57,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:57,017 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:57,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 19:55:57,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:55:57,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:57,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:55:57,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:57,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:57,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:57,395 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 31 treesize of output 23 [2022-03-03 19:55:57,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:57,397 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:55:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:57,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:57,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:57,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:57,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 19:55:57,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:57,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:57,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:55:58,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:58,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:58,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:58,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:55:58,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:58,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:58,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:58,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:55:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:58,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854528393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:58,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:58,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-03 19:55:58,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651727999] [2022-03-03 19:55:58,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:58,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:55:58,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:58,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:55:58,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:55:58,365 INFO L87 Difference]: Start difference. First operand 5120 states and 17664 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:01,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:01,370 INFO L93 Difference]: Finished difference Result 8343 states and 26950 transitions. [2022-03-03 19:56:01,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 19:56:01,370 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:56:01,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:01,384 INFO L225 Difference]: With dead ends: 8343 [2022-03-03 19:56:01,385 INFO L226 Difference]: Without dead ends: 8313 [2022-03-03 19:56:01,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=956, Invalid=5364, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:56:01,386 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 400 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:01,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 303 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1761 Invalid, 0 Unknown, 184 Unchecked, 0.9s Time] [2022-03-03 19:56:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8313 states. [2022-03-03 19:56:01,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8313 to 5156. [2022-03-03 19:56:01,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5156 states, 5155 states have (on average 3.45082444228904) internal successors, (17789), 5155 states have internal predecessors, (17789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5156 states to 5156 states and 17789 transitions. [2022-03-03 19:56:01,505 INFO L78 Accepts]: Start accepts. Automaton has 5156 states and 17789 transitions. Word has length 30 [2022-03-03 19:56:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:01,505 INFO L470 AbstractCegarLoop]: Abstraction has 5156 states and 17789 transitions. [2022-03-03 19:56:01,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 5156 states and 17789 transitions. [2022-03-03 19:56:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:01,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:01,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:01,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:01,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-03 19:56:01,713 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:01,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:01,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2110958692, now seen corresponding path program 27 times [2022-03-03 19:56:01,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:01,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528415520] [2022-03-03 19:56:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:01,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:02,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:02,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528415520] [2022-03-03 19:56:02,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528415520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:02,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812813453] [2022-03-03 19:56:02,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:56:02,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:02,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:02,104 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:02,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 19:56:02,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:56:02,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:02,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 19:56:02,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:02,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:02,495 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 53 [2022-03-03 19:56:02,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:02,504 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 61 [2022-03-03 19:56:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:02,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:03,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:03,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:03,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:03,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 61 [2022-03-03 19:56:03,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:03,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:03,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:03,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 51 [2022-03-03 19:56:03,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:03,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-03-03 19:56:03,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:03,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-03-03 19:56:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:03,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812813453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:03,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:03,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-03-03 19:56:03,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048539971] [2022-03-03 19:56:03,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:03,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 19:56:03,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 19:56:03,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:56:03,361 INFO L87 Difference]: Start difference. First operand 5156 states and 17789 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:08,845 INFO L93 Difference]: Finished difference Result 9452 states and 30912 transitions. [2022-03-03 19:56:08,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 19:56:08,845 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:56:08,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:08,863 INFO L225 Difference]: With dead ends: 9452 [2022-03-03 19:56:08,864 INFO L226 Difference]: Without dead ends: 9437 [2022-03-03 19:56:08,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1233, Invalid=8079, Unknown=0, NotChecked=0, Total=9312 [2022-03-03 19:56:08,864 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 835 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 3141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:08,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 453 Invalid, 3141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:56:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9437 states. [2022-03-03 19:56:08,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9437 to 5134. [2022-03-03 19:56:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5134 states, 5133 states have (on average 3.450613676212741) internal successors, (17712), 5133 states have internal predecessors, (17712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5134 states to 5134 states and 17712 transitions. [2022-03-03 19:56:08,964 INFO L78 Accepts]: Start accepts. Automaton has 5134 states and 17712 transitions. Word has length 30 [2022-03-03 19:56:08,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:08,965 INFO L470 AbstractCegarLoop]: Abstraction has 5134 states and 17712 transitions. [2022-03-03 19:56:08,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:08,965 INFO L276 IsEmpty]: Start isEmpty. Operand 5134 states and 17712 transitions. [2022-03-03 19:56:08,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:08,972 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:08,972 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:08,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-03 19:56:09,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:09,172 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:09,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2100686710, now seen corresponding path program 28 times [2022-03-03 19:56:09,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:09,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055407284] [2022-03-03 19:56:09,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:09,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:09,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:09,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055407284] [2022-03-03 19:56:09,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055407284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:09,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879197155] [2022-03-03 19:56:09,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:56:09,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:09,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:09,561 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:09,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 19:56:09,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:56:09,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:09,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:56:09,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:09,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:09,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:09,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:09,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-03 19:56:09,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:09,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:09,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 8 [2022-03-03 19:56:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:09,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:10,298 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:56:10,299 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 69 [2022-03-03 19:56:10,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:10,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:10,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:56:10,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:10,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:10,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:10,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:56:10,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:10,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:10,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:10,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:56:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:10,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879197155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:10,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:10,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-03 19:56:10,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854119065] [2022-03-03 19:56:10,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:10,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:56:10,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:10,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:56:10,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:56:10,850 INFO L87 Difference]: Start difference. First operand 5134 states and 17712 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:18,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:18,082 INFO L93 Difference]: Finished difference Result 11132 states and 35856 transitions. [2022-03-03 19:56:18,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-03 19:56:18,083 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:56:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:18,103 INFO L225 Difference]: With dead ends: 11132 [2022-03-03 19:56:18,103 INFO L226 Difference]: Without dead ends: 11029 [2022-03-03 19:56:18,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5359 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1864, Invalid=13388, Unknown=0, NotChecked=0, Total=15252 [2022-03-03 19:56:18,104 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 577 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 3768 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 4764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 3768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 752 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:18,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 901 Invalid, 4764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 3768 Invalid, 0 Unknown, 752 Unchecked, 1.9s Time] [2022-03-03 19:56:18,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11029 states. [2022-03-03 19:56:18,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11029 to 5128. [2022-03-03 19:56:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 3.4488004681100057) internal successors, (17682), 5127 states have internal predecessors, (17682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 17682 transitions. [2022-03-03 19:56:18,224 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 17682 transitions. Word has length 30 [2022-03-03 19:56:18,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:18,224 INFO L470 AbstractCegarLoop]: Abstraction has 5128 states and 17682 transitions. [2022-03-03 19:56:18,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 17682 transitions. [2022-03-03 19:56:18,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:18,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:18,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:18,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:18,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-03 19:56:18,432 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:18,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:18,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1568664778, now seen corresponding path program 29 times [2022-03-03 19:56:18,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:18,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043995785] [2022-03-03 19:56:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:18,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:18,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:18,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043995785] [2022-03-03 19:56:18,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043995785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:18,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007390176] [2022-03-03 19:56:18,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:56:18,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:18,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:18,787 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:18,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 19:56:18,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:56:18,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:18,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:56:18,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:19,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:19,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:19,163 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 31 treesize of output 23 [2022-03-03 19:56:19,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:19,165 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:56:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:19,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:19,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:19,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:19,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 19:56:19,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:19,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:19,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:56:19,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:19,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:19,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:19,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:56:19,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:19,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:19,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:19,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:56:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:20,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007390176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:20,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:20,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-03-03 19:56:20,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397015300] [2022-03-03 19:56:20,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:20,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:56:20,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:20,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:56:20,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:56:20,154 INFO L87 Difference]: Start difference. First operand 5128 states and 17682 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:26,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:26,601 INFO L93 Difference]: Finished difference Result 9405 states and 30134 transitions. [2022-03-03 19:56:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-03 19:56:26,601 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:56:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:26,617 INFO L225 Difference]: With dead ends: 9405 [2022-03-03 19:56:26,617 INFO L226 Difference]: Without dead ends: 9375 [2022-03-03 19:56:26,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6342 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2071, Invalid=15485, Unknown=0, NotChecked=0, Total=17556 [2022-03-03 19:56:26,618 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 461 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 2581 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 3167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 2581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:26,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 582 Invalid, 3167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 2581 Invalid, 0 Unknown, 370 Unchecked, 1.4s Time] [2022-03-03 19:56:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9375 states. [2022-03-03 19:56:26,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9375 to 5146. [2022-03-03 19:56:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5146 states, 5145 states have (on average 3.4487852283770652) internal successors, (17744), 5145 states have internal predecessors, (17744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5146 states to 5146 states and 17744 transitions. [2022-03-03 19:56:26,715 INFO L78 Accepts]: Start accepts. Automaton has 5146 states and 17744 transitions. Word has length 30 [2022-03-03 19:56:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:26,715 INFO L470 AbstractCegarLoop]: Abstraction has 5146 states and 17744 transitions. [2022-03-03 19:56:26,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 5146 states and 17744 transitions. [2022-03-03 19:56:26,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:26,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:26,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:26,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-03 19:56:26,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-03 19:56:26,922 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:26,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:26,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1175143098, now seen corresponding path program 30 times [2022-03-03 19:56:26,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:26,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953359051] [2022-03-03 19:56:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:26,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:27,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:27,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953359051] [2022-03-03 19:56:27,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953359051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:27,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226264410] [2022-03-03 19:56:27,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:56:27,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:27,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:27,265 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:27,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 19:56:27,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:56:27,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:27,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:56:27,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:27,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:27,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:27,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-03 19:56:27,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-03-03 19:56:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:27,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:27,967 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:56:27,968 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 69 [2022-03-03 19:56:27,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:27,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:27,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:56:28,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:28,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:28,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:28,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:56:28,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:28,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:28,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:28,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:56:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:28,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226264410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:28,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:28,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-03 19:56:28,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398161286] [2022-03-03 19:56:28,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:28,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:56:28,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:28,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:56:28,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:56:28,504 INFO L87 Difference]: Start difference. First operand 5146 states and 17744 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:32,837 INFO L93 Difference]: Finished difference Result 9366 states and 30559 transitions. [2022-03-03 19:56:32,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-03 19:56:32,837 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:56:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:32,854 INFO L225 Difference]: With dead ends: 9366 [2022-03-03 19:56:32,855 INFO L226 Difference]: Without dead ends: 9307 [2022-03-03 19:56:32,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=995, Invalid=6661, Unknown=0, NotChecked=0, Total=7656 [2022-03-03 19:56:32,856 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 422 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 602 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:32,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 572 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2348 Invalid, 0 Unknown, 602 Unchecked, 1.2s Time] [2022-03-03 19:56:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2022-03-03 19:56:32,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 5128. [2022-03-03 19:56:32,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 3.4488004681100057) internal successors, (17682), 5127 states have internal predecessors, (17682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 17682 transitions. [2022-03-03 19:56:32,982 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 17682 transitions. Word has length 30 [2022-03-03 19:56:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:32,983 INFO L470 AbstractCegarLoop]: Abstraction has 5128 states and 17682 transitions. [2022-03-03 19:56:32,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 17682 transitions. [2022-03-03 19:56:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:32,990 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:32,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:33,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-03 19:56:33,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-03 19:56:33,190 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:33,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:33,191 INFO L85 PathProgramCache]: Analyzing trace with hash -992757202, now seen corresponding path program 31 times [2022-03-03 19:56:33,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:33,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272878918] [2022-03-03 19:56:33,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:33,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:33,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:33,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272878918] [2022-03-03 19:56:33,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272878918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:33,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911728935] [2022-03-03 19:56:33,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:56:33,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:33,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:33,569 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:33,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 19:56:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:33,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:56:33,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:33,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:33,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:33,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-03 19:56:33,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-03-03 19:56:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:33,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:34,278 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:56:34,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 19:56:34,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:34,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:34,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:56:34,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:34,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:34,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:34,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:56:34,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:34,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:34,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:34,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:56:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:34,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911728935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:34,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:34,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-03 19:56:34,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715062922] [2022-03-03 19:56:34,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:34,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:56:34,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:34,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:56:34,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:56:34,854 INFO L87 Difference]: Start difference. First operand 5128 states and 17682 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:38,897 INFO L93 Difference]: Finished difference Result 9730 states and 31641 transitions. [2022-03-03 19:56:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:56:38,897 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:56:38,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:38,915 INFO L225 Difference]: With dead ends: 9730 [2022-03-03 19:56:38,915 INFO L226 Difference]: Without dead ends: 9641 [2022-03-03 19:56:38,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=971, Invalid=6511, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 19:56:38,916 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 404 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 2636 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 3572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 759 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:38,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 667 Invalid, 3572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2636 Invalid, 0 Unknown, 759 Unchecked, 1.3s Time] [2022-03-03 19:56:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9641 states. [2022-03-03 19:56:39,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9641 to 5129. [2022-03-03 19:56:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5129 states, 5128 states have (on average 3.4481279251170047) internal successors, (17682), 5128 states have internal predecessors, (17682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5129 states to 5129 states and 17682 transitions. [2022-03-03 19:56:39,020 INFO L78 Accepts]: Start accepts. Automaton has 5129 states and 17682 transitions. Word has length 30 [2022-03-03 19:56:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:39,021 INFO L470 AbstractCegarLoop]: Abstraction has 5129 states and 17682 transitions. [2022-03-03 19:56:39,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 5129 states and 17682 transitions. [2022-03-03 19:56:39,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:39,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:39,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:39,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-03 19:56:39,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-03-03 19:56:39,228 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:39,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:39,228 INFO L85 PathProgramCache]: Analyzing trace with hash 882054174, now seen corresponding path program 32 times [2022-03-03 19:56:39,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:39,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835588810] [2022-03-03 19:56:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:39,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:39,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:39,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835588810] [2022-03-03 19:56:39,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835588810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:39,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516681712] [2022-03-03 19:56:39,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:56:39,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:39,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:39,616 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:39,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 19:56:39,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:56:39,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:39,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:56:39,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:39,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:39,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:39,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-03-03 19:56:39,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-03-03 19:56:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:40,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:40,328 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:56:40,328 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 69 [2022-03-03 19:56:40,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:40,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:40,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:56:40,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:40,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:40,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:40,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:56:40,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:40,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:40,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:40,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:56:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:40,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516681712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:40,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:40,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-03 19:56:40,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298068449] [2022-03-03 19:56:40,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:40,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:56:40,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:40,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:56:40,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:56:40,887 INFO L87 Difference]: Start difference. First operand 5129 states and 17682 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:44,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:44,304 INFO L93 Difference]: Finished difference Result 9265 states and 30079 transitions. [2022-03-03 19:56:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 19:56:44,304 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:56:44,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:44,321 INFO L225 Difference]: With dead ends: 9265 [2022-03-03 19:56:44,322 INFO L226 Difference]: Without dead ends: 9231 [2022-03-03 19:56:44,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1949 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=884, Invalid=6088, Unknown=0, NotChecked=0, Total=6972 [2022-03-03 19:56:44,322 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 431 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:44,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 512 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 2311 Invalid, 0 Unknown, 448 Unchecked, 1.1s Time] [2022-03-03 19:56:44,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9231 states. [2022-03-03 19:56:44,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9231 to 5125. [2022-03-03 19:56:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5125 states, 5124 states have (on average 3.4484777517564402) internal successors, (17670), 5124 states have internal predecessors, (17670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 17670 transitions. [2022-03-03 19:56:44,421 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 17670 transitions. Word has length 30 [2022-03-03 19:56:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:44,422 INFO L470 AbstractCegarLoop]: Abstraction has 5125 states and 17670 transitions. [2022-03-03 19:56:44,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 17670 transitions. [2022-03-03 19:56:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:44,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:44,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:44,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-03 19:56:44,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:44,629 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:44,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash -169923416, now seen corresponding path program 33 times [2022-03-03 19:56:44,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:44,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761701995] [2022-03-03 19:56:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:44,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:45,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:45,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761701995] [2022-03-03 19:56:45,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761701995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:45,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752884022] [2022-03-03 19:56:45,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:56:45,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:45,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:45,032 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:45,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 19:56:45,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:56:45,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:45,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:56:45,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:45,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:45,496 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 41 treesize of output 57 [2022-03-03 19:56:45,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:45,513 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 79 treesize of output 87 [2022-03-03 19:56:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:46,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:46,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:46,468 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 60 treesize of output 93 [2022-03-03 19:56:46,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:46,493 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 77 [2022-03-03 19:56:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:47,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752884022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:47,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:47,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-03-03 19:56:47,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573083986] [2022-03-03 19:56:47,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:47,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:56:47,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:47,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:56:47,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:56:47,947 INFO L87 Difference]: Start difference. First operand 5125 states and 17670 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:50,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:50,737 INFO L93 Difference]: Finished difference Result 8763 states and 29254 transitions. [2022-03-03 19:56:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:56:50,737 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:56:50,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:50,754 INFO L225 Difference]: With dead ends: 8763 [2022-03-03 19:56:50,754 INFO L226 Difference]: Without dead ends: 8727 [2022-03-03 19:56:50,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=855, Invalid=4997, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:56:50,755 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 437 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 2498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 941 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:50,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 345 Invalid, 2498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1389 Invalid, 0 Unknown, 941 Unchecked, 0.8s Time] [2022-03-03 19:56:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8727 states. [2022-03-03 19:56:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8727 to 5167. [2022-03-03 19:56:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5167 states, 5166 states have (on average 3.446380178087495) internal successors, (17804), 5166 states have internal predecessors, (17804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5167 states to 5167 states and 17804 transitions. [2022-03-03 19:56:50,858 INFO L78 Accepts]: Start accepts. Automaton has 5167 states and 17804 transitions. Word has length 30 [2022-03-03 19:56:50,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:50,858 INFO L470 AbstractCegarLoop]: Abstraction has 5167 states and 17804 transitions. [2022-03-03 19:56:50,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:50,859 INFO L276 IsEmpty]: Start isEmpty. Operand 5167 states and 17804 transitions. [2022-03-03 19:56:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:50,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:50,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:50,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:51,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:51,068 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:51,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1970047154, now seen corresponding path program 34 times [2022-03-03 19:56:51,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:51,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898002318] [2022-03-03 19:56:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:51,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:51,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:51,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898002318] [2022-03-03 19:56:51,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898002318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:51,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404076995] [2022-03-03 19:56:51,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:56:51,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:51,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:51,463 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:51,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 19:56:51,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:56:51,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:51,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:56:51,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:51,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:51,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:51,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-03 19:56:51,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:51,859 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:56:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:51,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:52,244 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:56:52,244 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 69 [2022-03-03 19:56:52,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:52,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:52,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:56:52,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:52,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:52,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:52,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:56:52,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:52,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:52,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:52,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:56:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:52,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404076995] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:52,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:52,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-03 19:56:52,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125738022] [2022-03-03 19:56:52,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:52,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:56:52,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:56:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:56:52,797 INFO L87 Difference]: Start difference. First operand 5167 states and 17804 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:58,377 INFO L93 Difference]: Finished difference Result 10064 states and 32690 transitions. [2022-03-03 19:56:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-03 19:56:58,378 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:56:58,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:58,397 INFO L225 Difference]: With dead ends: 10064 [2022-03-03 19:56:58,397 INFO L226 Difference]: Without dead ends: 10030 [2022-03-03 19:56:58,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3703 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1381, Invalid=10391, Unknown=0, NotChecked=0, Total=11772 [2022-03-03 19:56:58,398 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 462 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 2884 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 3370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:58,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 457 Invalid, 3370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2884 Invalid, 0 Unknown, 273 Unchecked, 1.6s Time] [2022-03-03 19:56:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2022-03-03 19:56:58,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 5264. [2022-03-03 19:56:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5263 states have (on average 3.444423332699981) internal successors, (18128), 5263 states have internal predecessors, (18128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:58,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 18128 transitions. [2022-03-03 19:56:58,509 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 18128 transitions. Word has length 30 [2022-03-03 19:56:58,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:58,509 INFO L470 AbstractCegarLoop]: Abstraction has 5264 states and 18128 transitions. [2022-03-03 19:56:58,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 18128 transitions. [2022-03-03 19:56:58,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:58,517 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:58,517 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:58,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:58,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:58,718 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:58,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:58,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1265219960, now seen corresponding path program 35 times [2022-03-03 19:56:58,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:58,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611231695] [2022-03-03 19:56:58,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:58,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:59,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:59,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611231695] [2022-03-03 19:56:59,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611231695] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:59,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112896102] [2022-03-03 19:56:59,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:56:59,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:59,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:59,083 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:59,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 19:56:59,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:56:59,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:59,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:56:59,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:59,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:59,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:59,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2022-03-03 19:56:59,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:59,446 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 21 treesize of output 26 [2022-03-03 19:56:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:59,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:59,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:59,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:59,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 68 [2022-03-03 19:56:59,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:59,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:59,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-03 19:57:00,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:00,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:00,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:00,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:57:00,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:00,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:00,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:00,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:57:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:00,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112896102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:00,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:00,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-03 19:57:00,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674380955] [2022-03-03 19:57:00,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:00,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:57:00,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:00,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:57:00,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:57:00,406 INFO L87 Difference]: Start difference. First operand 5264 states and 18128 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:10,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:10,923 INFO L93 Difference]: Finished difference Result 11819 states and 36632 transitions. [2022-03-03 19:57:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-03-03 19:57:10,923 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:57:10,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:10,945 INFO L225 Difference]: With dead ends: 11819 [2022-03-03 19:57:10,945 INFO L226 Difference]: Without dead ends: 11645 [2022-03-03 19:57:10,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11439 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=3688, Invalid=28174, Unknown=0, NotChecked=0, Total=31862 [2022-03-03 19:57:10,947 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 723 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 3997 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 4253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 3997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:10,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 869 Invalid, 4253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 3997 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-03 19:57:10,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11645 states. [2022-03-03 19:57:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11645 to 5298. [2022-03-03 19:57:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5298 states, 5297 states have (on average 3.4470454974513878) internal successors, (18259), 5297 states have internal predecessors, (18259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5298 states to 5298 states and 18259 transitions. [2022-03-03 19:57:11,097 INFO L78 Accepts]: Start accepts. Automaton has 5298 states and 18259 transitions. Word has length 30 [2022-03-03 19:57:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:11,097 INFO L470 AbstractCegarLoop]: Abstraction has 5298 states and 18259 transitions. [2022-03-03 19:57:11,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5298 states and 18259 transitions. [2022-03-03 19:57:11,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:11,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:11,104 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:11,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-03 19:57:11,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-03 19:57:11,305 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:11,305 INFO L85 PathProgramCache]: Analyzing trace with hash 596373144, now seen corresponding path program 36 times [2022-03-03 19:57:11,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:11,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733571286] [2022-03-03 19:57:11,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:11,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:11,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:11,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733571286] [2022-03-03 19:57:11,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733571286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:11,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542743444] [2022-03-03 19:57:11,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:57:11,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:11,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:11,692 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:11,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 19:57:11,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:57:11,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:11,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:57:11,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:11,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:11,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:11,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-03-03 19:57:12,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:12,002 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 21 treesize of output 26 [2022-03-03 19:57:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:12,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:12,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:12,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:12,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 19:57:12,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:12,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:12,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:57:12,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:12,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:12,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:12,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:57:12,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:12,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:12,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:12,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:57:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:12,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542743444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:12,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:12,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-03 19:57:12,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589423553] [2022-03-03 19:57:12,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:12,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:57:12,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:57:12,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:57:12,935 INFO L87 Difference]: Start difference. First operand 5298 states and 18259 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:18,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:18,135 INFO L93 Difference]: Finished difference Result 10021 states and 32027 transitions. [2022-03-03 19:57:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-03 19:57:18,136 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:57:18,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:18,152 INFO L225 Difference]: With dead ends: 10021 [2022-03-03 19:57:18,153 INFO L226 Difference]: Without dead ends: 9865 [2022-03-03 19:57:18,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3692 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1731, Invalid=9399, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 19:57:18,153 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 553 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 2408 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:18,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 371 Invalid, 2673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2408 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:57:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9865 states. [2022-03-03 19:57:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9865 to 5364. [2022-03-03 19:57:18,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5364 states, 5363 states have (on average 3.442103300391572) internal successors, (18460), 5363 states have internal predecessors, (18460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5364 states to 5364 states and 18460 transitions. [2022-03-03 19:57:18,260 INFO L78 Accepts]: Start accepts. Automaton has 5364 states and 18460 transitions. Word has length 30 [2022-03-03 19:57:18,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:18,260 INFO L470 AbstractCegarLoop]: Abstraction has 5364 states and 18460 transitions. [2022-03-03 19:57:18,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 5364 states and 18460 transitions. [2022-03-03 19:57:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:18,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:18,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:18,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:18,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:18,469 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:18,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1274241086, now seen corresponding path program 37 times [2022-03-03 19:57:18,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:18,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730152756] [2022-03-03 19:57:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:18,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:18,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:18,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730152756] [2022-03-03 19:57:18,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730152756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:18,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142530796] [2022-03-03 19:57:18,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:57:18,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:18,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:18,822 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:18,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 19:57:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:18,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:57:18,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:19,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:19,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:19,166 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 36 treesize of output 28 [2022-03-03 19:57:19,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:19,168 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:57:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:19,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:19,502 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:57:19,503 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 69 [2022-03-03 19:57:19,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:19,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:19,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:57:19,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:19,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:19,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:19,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:57:19,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:19,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:19,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:19,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:57:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:20,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142530796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:20,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:20,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-03 19:57:20,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026446395] [2022-03-03 19:57:20,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:20,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:57:20,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:20,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:57:20,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:57:20,076 INFO L87 Difference]: Start difference. First operand 5364 states and 18460 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:27,358 INFO L93 Difference]: Finished difference Result 10403 states and 33580 transitions. [2022-03-03 19:57:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-03 19:57:27,358 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:57:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:27,379 INFO L225 Difference]: With dead ends: 10403 [2022-03-03 19:57:27,380 INFO L226 Difference]: Without dead ends: 10349 [2022-03-03 19:57:27,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6035 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2112, Invalid=15180, Unknown=0, NotChecked=0, Total=17292 [2022-03-03 19:57:27,381 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 551 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 3540 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 3796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 3540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:27,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 528 Invalid, 3796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 3540 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-03 19:57:27,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10349 states. [2022-03-03 19:57:27,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10349 to 5441. [2022-03-03 19:57:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 3.4382352941176473) internal successors, (18704), 5440 states have internal predecessors, (18704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 18704 transitions. [2022-03-03 19:57:27,511 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 18704 transitions. Word has length 30 [2022-03-03 19:57:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:27,511 INFO L470 AbstractCegarLoop]: Abstraction has 5441 states and 18704 transitions. [2022-03-03 19:57:27,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:27,512 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 18704 transitions. [2022-03-03 19:57:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:27,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:27,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:27,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-03 19:57:27,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:27,721 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:27,721 INFO L85 PathProgramCache]: Analyzing trace with hash 399924082, now seen corresponding path program 38 times [2022-03-03 19:57:27,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:27,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090962977] [2022-03-03 19:57:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:27,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:28,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:28,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090962977] [2022-03-03 19:57:28,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090962977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:28,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876706722] [2022-03-03 19:57:28,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:57:28,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:28,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:28,204 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:28,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 19:57:28,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:57:28,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:28,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:57:28,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:28,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:28,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:28,595 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 45 treesize of output 37 [2022-03-03 19:57:28,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:28,597 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-03 19:57:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:28,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:28,942 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:57:28,942 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 33 treesize of output 68 [2022-03-03 19:57:28,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:28,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:28,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-03 19:57:29,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:29,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:29,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:29,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 61 [2022-03-03 19:57:29,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:29,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:29,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:29,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 51 [2022-03-03 19:57:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:29,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876706722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:29,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:29,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 33 [2022-03-03 19:57:29,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083777024] [2022-03-03 19:57:29,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:29,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:57:29,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:29,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:57:29,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:57:29,537 INFO L87 Difference]: Start difference. First operand 5441 states and 18704 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:34,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:34,846 INFO L93 Difference]: Finished difference Result 9661 states and 31427 transitions. [2022-03-03 19:57:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 19:57:34,846 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:57:34,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:34,866 INFO L225 Difference]: With dead ends: 9661 [2022-03-03 19:57:34,866 INFO L226 Difference]: Without dead ends: 9592 [2022-03-03 19:57:34,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3813 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1380, Invalid=9962, Unknown=0, NotChecked=0, Total=11342 [2022-03-03 19:57:34,868 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 554 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 2692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:34,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 392 Invalid, 2692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 2341 Invalid, 0 Unknown, 105 Unchecked, 1.3s Time] [2022-03-03 19:57:34,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9592 states. [2022-03-03 19:57:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9592 to 5480. [2022-03-03 19:57:34,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5480 states, 5479 states have (on average 3.436210987406461) internal successors, (18827), 5479 states have internal predecessors, (18827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5480 states to 5480 states and 18827 transitions. [2022-03-03 19:57:34,992 INFO L78 Accepts]: Start accepts. Automaton has 5480 states and 18827 transitions. Word has length 30 [2022-03-03 19:57:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:34,992 INFO L470 AbstractCegarLoop]: Abstraction has 5480 states and 18827 transitions. [2022-03-03 19:57:34,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 5480 states and 18827 transitions. [2022-03-03 19:57:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:35,000 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:35,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:35,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-03 19:57:35,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-03 19:57:35,201 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:35,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:35,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2104067314, now seen corresponding path program 39 times [2022-03-03 19:57:35,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:35,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843926828] [2022-03-03 19:57:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:35,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:35,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:35,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843926828] [2022-03-03 19:57:35,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843926828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:35,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864339380] [2022-03-03 19:57:35,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:57:35,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:35,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:35,632 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:35,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 19:57:35,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:57:35,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:35,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:57:35,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:36,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:36,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:36,072 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 36 treesize of output 28 [2022-03-03 19:57:36,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:36,074 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:57:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:36,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:36,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:36,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:36,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 19:57:36,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:36,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:36,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:57:36,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:36,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:36,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:36,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:57:36,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:36,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:36,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:36,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:57:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:37,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864339380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:37,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:37,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-03 19:57:37,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232886406] [2022-03-03 19:57:37,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:37,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:57:37,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:37,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:57:37,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:57:37,023 INFO L87 Difference]: Start difference. First operand 5480 states and 18827 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:39,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:39,551 INFO L93 Difference]: Finished difference Result 8850 states and 28600 transitions. [2022-03-03 19:57:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:57:39,555 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:57:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:39,576 INFO L225 Difference]: With dead ends: 8850 [2022-03-03 19:57:39,576 INFO L226 Difference]: Without dead ends: 8820 [2022-03-03 19:57:39,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=959, Invalid=4591, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 19:57:39,577 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 465 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 688 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:39,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 278 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1164 Invalid, 0 Unknown, 688 Unchecked, 0.7s Time] [2022-03-03 19:57:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8820 states. [2022-03-03 19:57:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8820 to 5516. [2022-03-03 19:57:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5516 states, 5515 states have (on average 3.4357207615593834) internal successors, (18948), 5515 states have internal predecessors, (18948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5516 states to 5516 states and 18948 transitions. [2022-03-03 19:57:39,697 INFO L78 Accepts]: Start accepts. Automaton has 5516 states and 18948 transitions. Word has length 30 [2022-03-03 19:57:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:39,697 INFO L470 AbstractCegarLoop]: Abstraction has 5516 states and 18948 transitions. [2022-03-03 19:57:39,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 5516 states and 18948 transitions. [2022-03-03 19:57:39,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:39,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:39,706 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:39,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-03 19:57:39,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-03 19:57:39,907 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:39,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:39,907 INFO L85 PathProgramCache]: Analyzing trace with hash -385351846, now seen corresponding path program 40 times [2022-03-03 19:57:39,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:39,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033825099] [2022-03-03 19:57:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:39,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:40,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:40,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033825099] [2022-03-03 19:57:40,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033825099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:40,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222239053] [2022-03-03 19:57:40,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:57:40,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:40,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:40,249 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:40,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 19:57:40,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:57:40,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:40,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:57:40,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:40,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:40,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:40,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-03-03 19:57:40,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-03-03 19:57:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:40,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:40,955 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:57:40,956 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 69 [2022-03-03 19:57:40,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:40,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:40,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:57:41,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:41,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:41,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:41,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:57:41,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:41,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:41,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:41,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:57:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:41,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222239053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:41,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:41,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-03 19:57:41,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056651847] [2022-03-03 19:57:41,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:41,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:57:41,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:41,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:57:41,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:57:41,566 INFO L87 Difference]: Start difference. First operand 5516 states and 18948 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:45,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:45,427 INFO L93 Difference]: Finished difference Result 10245 states and 33277 transitions. [2022-03-03 19:57:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 19:57:45,428 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:57:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:45,449 INFO L225 Difference]: With dead ends: 10245 [2022-03-03 19:57:45,449 INFO L226 Difference]: Without dead ends: 10152 [2022-03-03 19:57:45,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2397 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1109, Invalid=6901, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 19:57:45,451 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 499 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 507 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:45,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 512 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1906 Invalid, 0 Unknown, 507 Unchecked, 1.0s Time] [2022-03-03 19:57:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10152 states. [2022-03-03 19:57:45,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10152 to 5505. [2022-03-03 19:57:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 5504 states have (on average 3.4353197674418605) internal successors, (18908), 5504 states have internal predecessors, (18908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 18908 transitions. [2022-03-03 19:57:45,606 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 18908 transitions. Word has length 30 [2022-03-03 19:57:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:45,606 INFO L470 AbstractCegarLoop]: Abstraction has 5505 states and 18908 transitions. [2022-03-03 19:57:45,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 18908 transitions. [2022-03-03 19:57:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:45,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:45,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:45,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:45,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:45,815 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:45,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:45,816 INFO L85 PathProgramCache]: Analyzing trace with hash 453798878, now seen corresponding path program 41 times [2022-03-03 19:57:45,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:45,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202331840] [2022-03-03 19:57:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:45,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:46,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:46,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202331840] [2022-03-03 19:57:46,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202331840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:46,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814765479] [2022-03-03 19:57:46,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:57:46,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:46,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:46,138 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:46,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 19:57:46,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:57:46,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:46,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:57:46,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:46,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:46,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:46,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:46,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 57 [2022-03-03 19:57:46,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:46,467 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 21 treesize of output 26 [2022-03-03 19:57:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:46,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:46,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:46,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:46,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 68 [2022-03-03 19:57:46,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:46,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:46,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-03 19:57:47,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:47,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:47,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:47,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 61 [2022-03-03 19:57:47,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:47,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:47,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:47,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 51 [2022-03-03 19:57:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:47,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814765479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:47,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:47,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-03 19:57:47,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949619250] [2022-03-03 19:57:47,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:47,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:57:47,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:47,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:57:47,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:57:47,495 INFO L87 Difference]: Start difference. First operand 5505 states and 18908 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:51,373 INFO L93 Difference]: Finished difference Result 9408 states and 30262 transitions. [2022-03-03 19:57:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 19:57:51,374 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:57:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:51,393 INFO L225 Difference]: With dead ends: 9408 [2022-03-03 19:57:51,393 INFO L226 Difference]: Without dead ends: 9330 [2022-03-03 19:57:51,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=958, Invalid=6014, Unknown=0, NotChecked=0, Total=6972 [2022-03-03 19:57:51,394 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 445 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 2340 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 462 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:51,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 494 Invalid, 2967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2340 Invalid, 0 Unknown, 462 Unchecked, 1.2s Time] [2022-03-03 19:57:51,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2022-03-03 19:57:51,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 5513. [2022-03-03 19:57:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 5512 states have (on average 3.434687953555878) internal successors, (18932), 5512 states have internal predecessors, (18932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 18932 transitions. [2022-03-03 19:57:51,516 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 18932 transitions. Word has length 30 [2022-03-03 19:57:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:51,516 INFO L470 AbstractCegarLoop]: Abstraction has 5513 states and 18932 transitions. [2022-03-03 19:57:51,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:51,516 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 18932 transitions. [2022-03-03 19:57:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:51,525 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:51,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:51,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-03 19:57:51,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:51,725 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:51,726 INFO L85 PathProgramCache]: Analyzing trace with hash 510504110, now seen corresponding path program 42 times [2022-03-03 19:57:51,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:51,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591971586] [2022-03-03 19:57:51,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:51,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:52,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:52,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591971586] [2022-03-03 19:57:52,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591971586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:52,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056245765] [2022-03-03 19:57:52,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:57:52,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:52,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:52,090 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:52,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-03 19:57:52,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:57:52,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:52,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:57:52,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:52,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:52,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:52,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-03 19:57:52,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-03 19:57:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:52,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:52,854 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:57:52,854 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 33 treesize of output 68 [2022-03-03 19:57:52,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:52,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:52,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-03 19:57:53,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:53,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:53,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:53,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 61 [2022-03-03 19:57:53,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:53,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:53,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:53,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 51 [2022-03-03 19:57:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:53,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056245765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:53,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:53,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 33 [2022-03-03 19:57:53,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394273821] [2022-03-03 19:57:53,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:53,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:57:53,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:53,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:57:53,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:57:53,429 INFO L87 Difference]: Start difference. First operand 5513 states and 18932 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:58,614 INFO L93 Difference]: Finished difference Result 10189 states and 33046 transitions. [2022-03-03 19:57:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 19:57:58,614 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:57:58,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:58,633 INFO L225 Difference]: With dead ends: 10189 [2022-03-03 19:57:58,634 INFO L226 Difference]: Without dead ends: 10093 [2022-03-03 19:57:58,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3046 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1243, Invalid=8857, Unknown=0, NotChecked=0, Total=10100 [2022-03-03 19:57:58,635 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 520 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 3438 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 4134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 3438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 481 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:58,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 924 Invalid, 4134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 3438 Invalid, 0 Unknown, 481 Unchecked, 1.7s Time] [2022-03-03 19:57:58,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10093 states. [2022-03-03 19:57:58,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10093 to 5505. [2022-03-03 19:57:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 5504 states have (on average 3.4353197674418605) internal successors, (18908), 5504 states have internal predecessors, (18908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 18908 transitions. [2022-03-03 19:57:58,783 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 18908 transitions. Word has length 30 [2022-03-03 19:57:58,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:58,783 INFO L470 AbstractCegarLoop]: Abstraction has 5505 states and 18908 transitions. [2022-03-03 19:57:58,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:58,783 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 18908 transitions. [2022-03-03 19:57:58,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:58,791 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:58,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:58,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:58,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-03 19:57:58,991 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash 330856445, now seen corresponding path program 38 times [2022-03-03 19:57:58,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:58,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789978012] [2022-03-03 19:57:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:58,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:59,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:59,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789978012] [2022-03-03 19:57:59,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789978012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:59,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597646766] [2022-03-03 19:57:59,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:57:59,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:59,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:59,404 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:59,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-03 19:57:59,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:57:59,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:59,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 19:57:59,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:59,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:59,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:59,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:59,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2022-03-03 19:57:59,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:59,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:59,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:59,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-03-03 19:57:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:59,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:00,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:00,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:00,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:00,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:00,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 56 [2022-03-03 19:58:00,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:00,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:00,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:00,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:00,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 44 [2022-03-03 19:58:00,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:00,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:00,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:00,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:58:00,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:00,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:00,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:00,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 19:58:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:00,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597646766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:00,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:00,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2022-03-03 19:58:00,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19316367] [2022-03-03 19:58:00,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:00,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:58:00,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:00,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:58:00,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:58:00,392 INFO L87 Difference]: Start difference. First operand 5505 states and 18908 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:06,805 INFO L93 Difference]: Finished difference Result 10065 states and 32925 transitions. [2022-03-03 19:58:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-03 19:58:06,805 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:58:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:06,826 INFO L225 Difference]: With dead ends: 10065 [2022-03-03 19:58:06,826 INFO L226 Difference]: Without dead ends: 9949 [2022-03-03 19:58:06,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6811 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2468, Invalid=15622, Unknown=0, NotChecked=0, Total=18090 [2022-03-03 19:58:06,827 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 554 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 3022 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 3255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 3022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:06,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 681 Invalid, 3255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 3022 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:58:06,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9949 states. [2022-03-03 19:58:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9949 to 5556. [2022-03-03 19:58:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5556 states, 5555 states have (on average 3.4333033303330334) internal successors, (19072), 5555 states have internal predecessors, (19072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:06,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 19072 transitions. [2022-03-03 19:58:06,953 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 19072 transitions. Word has length 30 [2022-03-03 19:58:06,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:06,953 INFO L470 AbstractCegarLoop]: Abstraction has 5556 states and 19072 transitions. [2022-03-03 19:58:06,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:06,953 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 19072 transitions. [2022-03-03 19:58:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:58:06,962 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:06,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:06,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-03 19:58:07,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:07,162 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:07,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:07,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1561065469, now seen corresponding path program 39 times [2022-03-03 19:58:07,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:07,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579318926] [2022-03-03 19:58:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:07,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:07,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:07,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579318926] [2022-03-03 19:58:07,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579318926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:07,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348185060] [2022-03-03 19:58:07,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:58:07,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:07,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:07,520 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:07,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-03 19:58:07,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:58:07,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:07,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:58:07,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:07,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:07,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:07,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:07,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 65 [2022-03-03 19:58:07,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:07,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:07,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:07,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 75 [2022-03-03 19:58:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:08,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:08,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:08,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:08,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:08,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:08,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2022-03-03 19:58:08,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:08,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:08,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:08,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:08,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-03 19:58:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:08,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348185060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:08,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:08,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 36 [2022-03-03 19:58:08,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972503294] [2022-03-03 19:58:08,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:08,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 19:58:08,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:08,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 19:58:08,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:58:08,724 INFO L87 Difference]: Start difference. First operand 5556 states and 19072 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:14,858 INFO L93 Difference]: Finished difference Result 10415 states and 33999 transitions. [2022-03-03 19:58:14,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-03 19:58:14,858 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:58:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:14,879 INFO L225 Difference]: With dead ends: 10415 [2022-03-03 19:58:14,879 INFO L226 Difference]: Without dead ends: 10290 [2022-03-03 19:58:14,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4383 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1653, Invalid=12867, Unknown=0, NotChecked=0, Total=14520 [2022-03-03 19:58:14,880 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 518 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 3217 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 4601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 3217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1218 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:14,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 1036 Invalid, 4601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 3217 Invalid, 0 Unknown, 1218 Unchecked, 1.6s Time] [2022-03-03 19:58:14,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10290 states. [2022-03-03 19:58:14,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10290 to 5927. [2022-03-03 19:58:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5927 states, 5926 states have (on average 3.4206884913938578) internal successors, (20271), 5926 states have internal predecessors, (20271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5927 states to 5927 states and 20271 transitions. [2022-03-03 19:58:15,018 INFO L78 Accepts]: Start accepts. Automaton has 5927 states and 20271 transitions. Word has length 30 [2022-03-03 19:58:15,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:15,018 INFO L470 AbstractCegarLoop]: Abstraction has 5927 states and 20271 transitions. [2022-03-03 19:58:15,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 5927 states and 20271 transitions. [2022-03-03 19:58:15,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:58:15,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:15,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:15,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-03 19:58:15,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:15,228 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:15,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1598828051, now seen corresponding path program 40 times [2022-03-03 19:58:15,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:15,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578416229] [2022-03-03 19:58:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:15,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:15,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:15,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578416229] [2022-03-03 19:58:15,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578416229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:15,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55313552] [2022-03-03 19:58:15,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:58:15,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:15,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:15,648 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:15,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-03 19:58:15,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:58:15,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:15,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:58:15,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:16,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:16,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:16,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:16,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2022-03-03 19:58:16,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:16,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:16,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:16,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2022-03-03 19:58:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:16,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:16,318 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:58:16,318 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 38 treesize of output 63 [2022-03-03 19:58:16,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:16,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:16,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:16,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-03 19:58:16,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:16,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:16,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:16,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:58:16,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:16,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:16,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:16,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 19:58:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:16,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55313552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:16,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:16,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-03-03 19:58:16,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565439310] [2022-03-03 19:58:16,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:16,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:16,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:16,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:16,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:16,528 INFO L87 Difference]: Start difference. First operand 5927 states and 20271 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:21,849 INFO L93 Difference]: Finished difference Result 9568 states and 31970 transitions. [2022-03-03 19:58:21,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-03 19:58:21,850 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:58:21,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:21,869 INFO L225 Difference]: With dead ends: 9568 [2022-03-03 19:58:21,870 INFO L226 Difference]: Without dead ends: 9535 [2022-03-03 19:58:21,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3977 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1488, Invalid=10502, Unknown=0, NotChecked=0, Total=11990 [2022-03-03 19:58:21,870 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 406 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2677 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 2677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:21,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 492 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 2677 Invalid, 0 Unknown, 98 Unchecked, 1.3s Time] [2022-03-03 19:58:21,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9535 states. [2022-03-03 19:58:21,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9535 to 5943. [2022-03-03 19:58:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5943 states, 5942 states have (on average 3.418209357118815) internal successors, (20311), 5942 states have internal predecessors, (20311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:21,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5943 states to 5943 states and 20311 transitions. [2022-03-03 19:58:21,996 INFO L78 Accepts]: Start accepts. Automaton has 5943 states and 20311 transitions. Word has length 30 [2022-03-03 19:58:21,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:21,996 INFO L470 AbstractCegarLoop]: Abstraction has 5943 states and 20311 transitions. [2022-03-03 19:58:21,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:21,996 INFO L276 IsEmpty]: Start isEmpty. Operand 5943 states and 20311 transitions. [2022-03-03 19:58:22,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:58:22,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:22,005 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:22,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-03 19:58:22,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-03 19:58:22,206 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:22,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1121423259, now seen corresponding path program 41 times [2022-03-03 19:58:22,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:22,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878785454] [2022-03-03 19:58:22,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:22,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:22,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:22,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878785454] [2022-03-03 19:58:22,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878785454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:22,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443321164] [2022-03-03 19:58:22,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:58:22,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:22,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:22,560 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:22,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-03 19:58:22,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:58:22,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:22,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:58:22,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:22,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:22,993 INFO L353 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2022-03-03 19:58:22,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 198 treesize of output 164 [2022-03-03 19:58:22,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:22,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:22,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:22,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 8 [2022-03-03 19:58:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:23,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:23,291 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:58:23,291 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 38 treesize of output 63 [2022-03-03 19:58:23,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:23,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:23,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:23,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-03 19:58:23,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:23,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:23,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:23,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:58:23,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:23,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:23,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:23,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 19:58:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:23,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443321164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:23,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:23,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-03-03 19:58:23,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969437276] [2022-03-03 19:58:23,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:23,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:58:23,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:23,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:58:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:58:23,516 INFO L87 Difference]: Start difference. First operand 5943 states and 20311 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:27,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:27,702 INFO L93 Difference]: Finished difference Result 9113 states and 30304 transitions. [2022-03-03 19:58:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 19:58:27,702 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:58:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:27,721 INFO L225 Difference]: With dead ends: 9113 [2022-03-03 19:58:27,721 INFO L226 Difference]: Without dead ends: 9066 [2022-03-03 19:58:27,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2401 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1020, Invalid=6990, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 19:58:27,722 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 344 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 2562 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 2772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 2562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:27,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 479 Invalid, 2772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 2562 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:58:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9066 states. [2022-03-03 19:58:27,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9066 to 5977. [2022-03-03 19:58:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5977 states, 5976 states have (on average 3.4129852744310574) internal successors, (20396), 5976 states have internal predecessors, (20396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5977 states to 5977 states and 20396 transitions. [2022-03-03 19:58:27,868 INFO L78 Accepts]: Start accepts. Automaton has 5977 states and 20396 transitions. Word has length 30 [2022-03-03 19:58:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:27,868 INFO L470 AbstractCegarLoop]: Abstraction has 5977 states and 20396 transitions. [2022-03-03 19:58:27,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 5977 states and 20396 transitions. [2022-03-03 19:58:27,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:58:27,878 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:27,878 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:27,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-03 19:58:28,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:28,079 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:28,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:28,079 INFO L85 PathProgramCache]: Analyzing trace with hash 333797096, now seen corresponding path program 43 times [2022-03-03 19:58:28,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:28,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055527775] [2022-03-03 19:58:28,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:28,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:28,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:28,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055527775] [2022-03-03 19:58:28,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055527775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:28,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911372185] [2022-03-03 19:58:28,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:58:28,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:28,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:28,433 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:28,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-03 19:58:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:28,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:58:28,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:28,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:28,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:28,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-03-03 19:58:28,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:28,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:28,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-03 19:58:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:28,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:29,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:29,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:29,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 19:58:29,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:29,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:29,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:58:29,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:29,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:29,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:29,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:58:29,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:29,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:29,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:29,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:58:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:29,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911372185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:29,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:29,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-03 19:58:29,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031785850] [2022-03-03 19:58:29,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:29,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:58:29,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:29,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:58:29,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:58:29,804 INFO L87 Difference]: Start difference. First operand 5977 states and 20396 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:35,533 INFO L93 Difference]: Finished difference Result 13365 states and 41408 transitions. [2022-03-03 19:58:35,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-03 19:58:35,534 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:58:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:35,561 INFO L225 Difference]: With dead ends: 13365 [2022-03-03 19:58:35,562 INFO L226 Difference]: Without dead ends: 13335 [2022-03-03 19:58:35,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4639 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2494, Invalid=9716, Unknown=0, NotChecked=0, Total=12210 [2022-03-03 19:58:35,562 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 792 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:35,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 547 Invalid, 2673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 2279 Invalid, 0 Unknown, 92 Unchecked, 1.3s Time] [2022-03-03 19:58:35,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13335 states. [2022-03-03 19:58:35,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13335 to 6037. [2022-03-03 19:58:35,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6037 states, 6036 states have (on average 3.421139827700464) internal successors, (20650), 6036 states have internal predecessors, (20650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6037 states to 6037 states and 20650 transitions. [2022-03-03 19:58:35,728 INFO L78 Accepts]: Start accepts. Automaton has 6037 states and 20650 transitions. Word has length 30 [2022-03-03 19:58:35,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:35,728 INFO L470 AbstractCegarLoop]: Abstraction has 6037 states and 20650 transitions. [2022-03-03 19:58:35,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:35,729 INFO L276 IsEmpty]: Start isEmpty. Operand 6037 states and 20650 transitions. [2022-03-03 19:58:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:58:35,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:35,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:35,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-03 19:58:35,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:35,938 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:35,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1359796828, now seen corresponding path program 44 times [2022-03-03 19:58:35,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:35,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960186089] [2022-03-03 19:58:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:35,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:36,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:36,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960186089] [2022-03-03 19:58:36,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960186089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:36,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893137392] [2022-03-03 19:58:36,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:58:36,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:36,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:36,301 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:36,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-03 19:58:36,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:58:36,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:36,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:58:36,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:36,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:36,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:36,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-03-03 19:58:36,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-03-03 19:58:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:36,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:37,059 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:58:37,059 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 69 [2022-03-03 19:58:37,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:37,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:37,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:58:37,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:37,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:37,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:37,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 19:58:37,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:37,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:37,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:37,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 19:58:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:37,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893137392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:37,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:37,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-03 19:58:37,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515928595] [2022-03-03 19:58:37,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:37,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:58:37,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:37,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:58:37,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:58:37,671 INFO L87 Difference]: Start difference. First operand 6037 states and 20650 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:47,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:47,957 INFO L93 Difference]: Finished difference Result 12809 states and 39880 transitions. [2022-03-03 19:58:47,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-03 19:58:47,958 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:58:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:47,985 INFO L225 Difference]: With dead ends: 12809 [2022-03-03 19:58:47,985 INFO L226 Difference]: Without dead ends: 12750 [2022-03-03 19:58:47,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10503 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=3385, Invalid=23347, Unknown=0, NotChecked=0, Total=26732 [2022-03-03 19:58:47,987 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 700 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 3202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:47,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 797 Invalid, 3202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 2597 Invalid, 0 Unknown, 381 Unchecked, 1.6s Time] [2022-03-03 19:58:47,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12750 states. [2022-03-03 19:58:48,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12750 to 6136. [2022-03-03 19:58:48,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6136 states, 6135 states have (on average 3.4293398533007333) internal successors, (21039), 6135 states have internal predecessors, (21039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:48,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 21039 transitions. [2022-03-03 19:58:48,151 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 21039 transitions. Word has length 30 [2022-03-03 19:58:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:48,151 INFO L470 AbstractCegarLoop]: Abstraction has 6136 states and 21039 transitions. [2022-03-03 19:58:48,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:48,152 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 21039 transitions. [2022-03-03 19:58:48,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:58:48,161 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:48,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:48,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-03 19:58:48,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-03 19:58:48,362 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:48,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:48,362 INFO L85 PathProgramCache]: Analyzing trace with hash 445751308, now seen corresponding path program 45 times [2022-03-03 19:58:48,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:48,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398769352] [2022-03-03 19:58:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:48,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:48,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:48,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398769352] [2022-03-03 19:58:48,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398769352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:48,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277521310] [2022-03-03 19:58:48,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:58:48,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:48,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:48,754 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:48,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-03 19:58:48,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:58:48,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:48,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:58:48,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:49,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:49,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:49,129 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2022-03-03 19:58:49,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:49,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:49,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 52 [2022-03-03 19:58:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:49,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:49,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:49,639 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 60 treesize of output 93 [2022-03-03 19:58:49,666 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:49,667 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 77 [2022-03-03 19:58:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:50,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277521310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:50,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:50,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-03 19:58:50,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227606682] [2022-03-03 19:58:50,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:50,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:58:50,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:50,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:58:50,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:58:50,900 INFO L87 Difference]: Start difference. First operand 6136 states and 21039 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:00,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:59:00,202 INFO L93 Difference]: Finished difference Result 14192 states and 43942 transitions. [2022-03-03 19:59:00,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-03 19:59:00,203 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:59:00,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:59:00,233 INFO L225 Difference]: With dead ends: 14192 [2022-03-03 19:59:00,233 INFO L226 Difference]: Without dead ends: 14143 [2022-03-03 19:59:00,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9695 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=4123, Invalid=18527, Unknown=0, NotChecked=0, Total=22650 [2022-03-03 19:59:00,235 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 973 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 3769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1502 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:59:00,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 666 Invalid, 3769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1887 Invalid, 0 Unknown, 1502 Unchecked, 1.3s Time] [2022-03-03 19:59:00,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14143 states. [2022-03-03 19:59:00,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14143 to 6117. [2022-03-03 19:59:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6117 states, 6116 states have (on average 3.4270765206017004) internal successors, (20960), 6116 states have internal predecessors, (20960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6117 states to 6117 states and 20960 transitions. [2022-03-03 19:59:00,405 INFO L78 Accepts]: Start accepts. Automaton has 6117 states and 20960 transitions. Word has length 30 [2022-03-03 19:59:00,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:59:00,406 INFO L470 AbstractCegarLoop]: Abstraction has 6117 states and 20960 transitions. [2022-03-03 19:59:00,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6117 states and 20960 transitions. [2022-03-03 19:59:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:59:00,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:59:00,415 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:59:00,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-03 19:59:00,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:59:00,616 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:59:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:59:00,616 INFO L85 PathProgramCache]: Analyzing trace with hash 276304091, now seen corresponding path program 42 times [2022-03-03 19:59:00,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:59:00,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578759519] [2022-03-03 19:59:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:59:00,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:59:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:59:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:01,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:59:01,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578759519] [2022-03-03 19:59:01,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578759519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:59:01,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861205386] [2022-03-03 19:59:01,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:59:01,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:59:01,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:59:01,058 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:59:01,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-03 19:59:01,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:59:01,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:59:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:59:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:59:01,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:01,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:01,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:01,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-03-03 19:59:01,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:01,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:01,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:01,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-03-03 19:59:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:01,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:59:01,767 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:59:01,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 63 [2022-03-03 19:59:01,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:01,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:01,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:59:01,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-03 19:59:01,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:01,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:01,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:01,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:59:01,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:01,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:01,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:01,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 19:59:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:01,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861205386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:59:01,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:59:01,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-03-03 19:59:01,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031986296] [2022-03-03 19:59:01,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:59:01,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:59:01,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:59:01,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:59:01,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:59:01,973 INFO L87 Difference]: Start difference. First operand 6117 states and 20960 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:59:12,950 INFO L93 Difference]: Finished difference Result 11983 states and 39131 transitions. [2022-03-03 19:59:12,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-03-03 19:59:12,951 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:59:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:59:13,016 INFO L225 Difference]: With dead ends: 11983 [2022-03-03 19:59:13,016 INFO L226 Difference]: Without dead ends: 11868 [2022-03-03 19:59:13,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11971 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=4245, Invalid=25857, Unknown=0, NotChecked=0, Total=30102 [2022-03-03 19:59:13,017 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 799 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 3323 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 3929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 3323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:59:13,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [799 Valid, 624 Invalid, 3929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 3323 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-03 19:59:13,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11868 states. [2022-03-03 19:59:13,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11868 to 6146. [2022-03-03 19:59:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6146 states, 6145 states have (on average 3.4318958502847843) internal successors, (21089), 6145 states have internal predecessors, (21089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6146 states to 6146 states and 21089 transitions. [2022-03-03 19:59:13,147 INFO L78 Accepts]: Start accepts. Automaton has 6146 states and 21089 transitions. Word has length 30 [2022-03-03 19:59:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:59:13,147 INFO L470 AbstractCegarLoop]: Abstraction has 6146 states and 21089 transitions. [2022-03-03 19:59:13,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:13,148 INFO L276 IsEmpty]: Start isEmpty. Operand 6146 states and 21089 transitions. [2022-03-03 19:59:13,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:59:13,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:59:13,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:59:13,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-03 19:59:13,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:59:13,358 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:59:13,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:59:13,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1022527905, now seen corresponding path program 43 times [2022-03-03 19:59:13,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:59:13,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723870317] [2022-03-03 19:59:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:59:13,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:59:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:59:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:13,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:59:13,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723870317] [2022-03-03 19:59:13,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723870317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:59:13,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032125719] [2022-03-03 19:59:13,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:59:13,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:59:13,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:59:13,680 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:59:13,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-03 19:59:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:59:13,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:59:13,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:59:14,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:14,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:14,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:14,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-03-03 19:59:14,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:14,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:14,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:14,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2022-03-03 19:59:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:14,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:59:14,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:14,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:14,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:14,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:59:14,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2022-03-03 19:59:14,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:14,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:14,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:14,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:59:14,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 45 [2022-03-03 19:59:14,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:14,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:14,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:14,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:59:14,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:14,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:14,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:14,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 19:59:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:14,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032125719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:59:14,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:59:14,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 35 [2022-03-03 19:59:14,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60065791] [2022-03-03 19:59:14,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:59:14,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 19:59:14,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:59:14,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 19:59:14,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:59:14,540 INFO L87 Difference]: Start difference. First operand 6146 states and 21089 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:19,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:59:19,543 INFO L93 Difference]: Finished difference Result 12366 states and 40150 transitions. [2022-03-03 19:59:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-03 19:59:19,543 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:59:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:59:19,570 INFO L225 Difference]: With dead ends: 12366 [2022-03-03 19:59:19,570 INFO L226 Difference]: Without dead ends: 12265 [2022-03-03 19:59:19,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4366 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1942, Invalid=11168, Unknown=0, NotChecked=0, Total=13110 [2022-03-03 19:59:19,571 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 585 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 3742 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 3943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 3742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:59:19,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 1317 Invalid, 3943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 3742 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-03 19:59:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12265 states. [2022-03-03 19:59:19,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12265 to 6537. [2022-03-03 19:59:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6537 states, 6536 states have (on average 3.429620563035496) internal successors, (22416), 6536 states have internal predecessors, (22416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:19,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6537 states to 6537 states and 22416 transitions. [2022-03-03 19:59:19,761 INFO L78 Accepts]: Start accepts. Automaton has 6537 states and 22416 transitions. Word has length 30 [2022-03-03 19:59:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:59:19,761 INFO L470 AbstractCegarLoop]: Abstraction has 6537 states and 22416 transitions. [2022-03-03 19:59:19,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:59:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 6537 states and 22416 transitions. [2022-03-03 19:59:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:59:19,773 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:59:19,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:59:19,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-03 19:59:19,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:59:19,973 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:59:19,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:59:19,974 INFO L85 PathProgramCache]: Analyzing trace with hash 750579931, now seen corresponding path program 44 times [2022-03-03 19:59:19,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:59:19,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856211887] [2022-03-03 19:59:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:59:19,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:59:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:59:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:20,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:59:20,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856211887] [2022-03-03 19:59:20,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856211887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:59:20,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407970889] [2022-03-03 19:59:20,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:59:20,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:59:20,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:59:20,301 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:59:20,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-03 19:59:20,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:59:20,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:59:20,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 19:59:20,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:59:20,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:20,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:20,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:20,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:59:20,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:59:20,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:20,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:20,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:20,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:59:20,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 88 [2022-03-03 19:59:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:20,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:59:21,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:21,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:21,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:21,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:59:21,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2022-03-03 19:59:21,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:21,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:21,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:21,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:59:21,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 45 [2022-03-03 19:59:21,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:21,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:21,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:21,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:59:21,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:21,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:59:21,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:59:21,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 19:59:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:59:21,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407970889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:59:21,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:59:21,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 38 [2022-03-03 19:59:21,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206577132] [2022-03-03 19:59:21,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:59:21,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-03 19:59:21,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:59:21,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-03 19:59:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:59:21,521 INFO L87 Difference]: Start difference. First operand 6537 states and 22416 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:00:08,817 INFO L93 Difference]: Finished difference Result 23266 states and 73315 transitions. [2022-03-03 20:00:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 466 states. [2022-03-03 20:00:08,818 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:00:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:00:08,864 INFO L225 Difference]: With dead ends: 23266 [2022-03-03 20:00:08,864 INFO L226 Difference]: Without dead ends: 23000 [2022-03-03 20:00:08,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 494 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116960 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=34708, Invalid=210812, Unknown=0, NotChecked=0, Total=245520 [2022-03-03 20:00:08,873 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1936 mSDsluCounter, 3600 mSDsCounter, 0 mSdLazyCounter, 6909 mSolverCounterSat, 1132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1936 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 10809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1132 IncrementalHoareTripleChecker+Valid, 6909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2768 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:00:08,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1936 Valid, 1911 Invalid, 10809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1132 Valid, 6909 Invalid, 0 Unknown, 2768 Unchecked, 4.6s Time] [2022-03-03 20:00:08,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23000 states. [2022-03-03 20:00:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23000 to 7230. [2022-03-03 20:00:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7230 states, 7229 states have (on average 3.460229630654309) internal successors, (25014), 7229 states have internal predecessors, (25014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:09,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 25014 transitions. [2022-03-03 20:00:09,168 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 25014 transitions. Word has length 30 [2022-03-03 20:00:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:00:09,168 INFO L470 AbstractCegarLoop]: Abstraction has 7230 states and 25014 transitions. [2022-03-03 20:00:09,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:09,168 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 25014 transitions. [2022-03-03 20:00:09,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 20:00:09,178 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:00:09,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:00:09,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-03 20:00:09,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-03-03 20:00:09,379 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:00:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:00:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1836105554, now seen corresponding path program 46 times [2022-03-03 20:00:09,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:00:09,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127867680] [2022-03-03 20:00:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:00:09,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:00:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:00:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:09,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:00:09,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127867680] [2022-03-03 20:00:09,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127867680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:00:09,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675048429] [2022-03-03 20:00:09,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:00:09,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:09,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:00:09,710 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:00:09,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-03 20:00:09,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:00:09,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:00:09,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:00:09,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:00:10,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:10,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:10,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-03-03 20:00:10,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:10,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:10,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 26 [2022-03-03 20:00:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:10,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:00:10,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:10,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:10,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 20:00:10,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:10,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:10,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 20:00:10,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:10,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:10,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:10,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 20:00:10,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:10,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:10,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:10,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 20:00:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:10,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675048429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:00:10,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:00:10,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-03 20:00:10,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504607276] [2022-03-03 20:00:10,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:00:10,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 20:00:10,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:00:10,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 20:00:10,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2022-03-03 20:00:10,988 INFO L87 Difference]: Start difference. First operand 7230 states and 25014 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:00:17,755 INFO L93 Difference]: Finished difference Result 13524 states and 43551 transitions. [2022-03-03 20:00:17,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-03 20:00:17,756 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 20:00:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:00:17,782 INFO L225 Difference]: With dead ends: 13524 [2022-03-03 20:00:17,782 INFO L226 Difference]: Without dead ends: 13490 [2022-03-03 20:00:17,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5645 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2566, Invalid=12196, Unknown=0, NotChecked=0, Total=14762 [2022-03-03 20:00:17,784 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 830 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 2298 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 3252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 2298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 609 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:00:17,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 521 Invalid, 3252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 2298 Invalid, 0 Unknown, 609 Unchecked, 1.3s Time] [2022-03-03 20:00:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13490 states. [2022-03-03 20:00:17,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13490 to 7248. [2022-03-03 20:00:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7248 states, 7247 states have (on average 3.4600524354905478) internal successors, (25075), 7247 states have internal predecessors, (25075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:17,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7248 states to 7248 states and 25075 transitions. [2022-03-03 20:00:17,979 INFO L78 Accepts]: Start accepts. Automaton has 7248 states and 25075 transitions. Word has length 30 [2022-03-03 20:00:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:00:17,979 INFO L470 AbstractCegarLoop]: Abstraction has 7248 states and 25075 transitions. [2022-03-03 20:00:17,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 7248 states and 25075 transitions. [2022-03-03 20:00:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 20:00:17,990 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:00:17,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:00:18,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-03 20:00:18,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:18,191 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:00:18,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:00:18,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1822394888, now seen corresponding path program 47 times [2022-03-03 20:00:18,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:00:18,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689598536] [2022-03-03 20:00:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:00:18,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:00:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:00:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:18,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:00:18,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689598536] [2022-03-03 20:00:18,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689598536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:00:18,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892786275] [2022-03-03 20:00:18,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:00:18,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:18,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:00:18,515 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:00:18,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-03 20:00:18,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:00:18,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:00:18,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:00:18,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:00:18,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:18,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:18,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:18,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2022-03-03 20:00:18,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:18,839 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 21 treesize of output 26 [2022-03-03 20:00:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:18,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:00:19,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:19,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:19,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 20:00:19,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:19,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:19,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 20:00:19,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:19,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:19,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:19,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 20:00:19,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:19,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:19,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:19,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 20:00:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:19,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892786275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:00:19,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:00:19,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-03 20:00:19,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116859177] [2022-03-03 20:00:19,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:00:19,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 20:00:19,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:00:19,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 20:00:19,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-03-03 20:00:19,793 INFO L87 Difference]: Start difference. First operand 7248 states and 25075 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:29,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:00:29,946 INFO L93 Difference]: Finished difference Result 18143 states and 57239 transitions. [2022-03-03 20:00:29,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-03-03 20:00:29,946 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:00:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:00:29,981 INFO L225 Difference]: With dead ends: 18143 [2022-03-03 20:00:29,982 INFO L226 Difference]: Without dead ends: 17978 [2022-03-03 20:00:29,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11077 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=3738, Invalid=22344, Unknown=0, NotChecked=0, Total=26082 [2022-03-03 20:00:29,983 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 771 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 2581 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 4000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1177 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:00:29,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 705 Invalid, 4000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2581 Invalid, 0 Unknown, 1177 Unchecked, 1.5s Time] [2022-03-03 20:00:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17978 states. [2022-03-03 20:00:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17978 to 7278. [2022-03-03 20:00:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7278 states, 7277 states have (on average 3.4595300261096606) internal successors, (25175), 7277 states have internal predecessors, (25175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:30,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7278 states to 7278 states and 25175 transitions. [2022-03-03 20:00:30,213 INFO L78 Accepts]: Start accepts. Automaton has 7278 states and 25175 transitions. Word has length 30 [2022-03-03 20:00:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:00:30,213 INFO L470 AbstractCegarLoop]: Abstraction has 7278 states and 25175 transitions. [2022-03-03 20:00:30,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:30,214 INFO L276 IsEmpty]: Start isEmpty. Operand 7278 states and 25175 transitions. [2022-03-03 20:00:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 20:00:30,225 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:00:30,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:00:30,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-03 20:00:30,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:30,425 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:00:30,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:00:30,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1876694929, now seen corresponding path program 45 times [2022-03-03 20:00:30,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:00:30,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389480875] [2022-03-03 20:00:30,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:00:30,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:00:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:00:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:30,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:00:30,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389480875] [2022-03-03 20:00:30,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389480875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:00:30,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86455649] [2022-03-03 20:00:30,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:00:30,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:30,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:00:30,797 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:00:30,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-03 20:00:30,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:00:30,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:00:30,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:00:30,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:00:31,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:31,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:31,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 61 [2022-03-03 20:00:31,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:31,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:31,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 87 treesize of output 103 [2022-03-03 20:00:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:31,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:00:32,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:32,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:32,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:32,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:32,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 44 [2022-03-03 20:00:32,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:32,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:32,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:32,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:32,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-03-03 20:00:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:32,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86455649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:00:32,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:00:32,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 37 [2022-03-03 20:00:32,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85929443] [2022-03-03 20:00:32,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:00:32,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 20:00:32,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:00:32,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 20:00:32,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 20:00:32,118 INFO L87 Difference]: Start difference. First operand 7278 states and 25175 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:36,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:00:36,943 INFO L93 Difference]: Finished difference Result 10861 states and 36289 transitions. [2022-03-03 20:00:36,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 20:00:36,943 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:00:36,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:00:36,964 INFO L225 Difference]: With dead ends: 10861 [2022-03-03 20:00:36,964 INFO L226 Difference]: Without dead ends: 10816 [2022-03-03 20:00:36,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3219 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1387, Invalid=9533, Unknown=0, NotChecked=0, Total=10920 [2022-03-03 20:00:36,965 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 550 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 2974 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 3723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:00:36,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 1018 Invalid, 3723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2974 Invalid, 0 Unknown, 584 Unchecked, 1.4s Time] [2022-03-03 20:00:36,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10816 states. [2022-03-03 20:00:37,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10816 to 7318. [2022-03-03 20:00:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7318 states, 7317 states have (on average 3.4601612682793497) internal successors, (25318), 7317 states have internal predecessors, (25318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7318 states to 7318 states and 25318 transitions. [2022-03-03 20:00:37,112 INFO L78 Accepts]: Start accepts. Automaton has 7318 states and 25318 transitions. Word has length 30 [2022-03-03 20:00:37,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:00:37,113 INFO L470 AbstractCegarLoop]: Abstraction has 7318 states and 25318 transitions. [2022-03-03 20:00:37,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:37,113 INFO L276 IsEmpty]: Start isEmpty. Operand 7318 states and 25318 transitions. [2022-03-03 20:00:37,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 20:00:37,124 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:00:37,124 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:00:37,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-03 20:00:37,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:37,325 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:00:37,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:00:37,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2016344273, now seen corresponding path program 46 times [2022-03-03 20:00:37,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:00:37,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324107114] [2022-03-03 20:00:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:00:37,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:00:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:00:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:37,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:00:37,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324107114] [2022-03-03 20:00:37,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324107114] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:00:37,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505796349] [2022-03-03 20:00:37,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:00:37,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:37,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:00:37,714 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:00:37,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-03 20:00:37,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:00:37,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:00:37,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:00:37,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:00:38,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:38,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:38,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:38,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2022-03-03 20:00:38,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:38,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:38,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:38,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 79 [2022-03-03 20:00:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:38,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:00:38,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:38,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:38,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:38,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:38,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2022-03-03 20:00:38,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:38,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:38,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:38,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:38,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 45 [2022-03-03 20:00:38,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:38,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:38,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:38,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 20:00:38,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:38,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:38,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:00:38,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 20:00:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:38,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505796349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:00:38,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:00:38,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 33 [2022-03-03 20:00:38,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808192180] [2022-03-03 20:00:38,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:00:38,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 20:00:38,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:00:38,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 20:00:38,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 20:00:38,668 INFO L87 Difference]: Start difference. First operand 7318 states and 25318 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:43,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:00:43,935 INFO L93 Difference]: Finished difference Result 12931 states and 42701 transitions. [2022-03-03 20:00:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-03 20:00:43,936 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 20:00:43,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:00:43,964 INFO L225 Difference]: With dead ends: 12931 [2022-03-03 20:00:43,964 INFO L226 Difference]: Without dead ends: 12831 [2022-03-03 20:00:43,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4112 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1835, Invalid=10821, Unknown=0, NotChecked=0, Total=12656 [2022-03-03 20:00:43,965 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 681 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 3761 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 3998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 3761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:00:43,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 1309 Invalid, 3998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 3761 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-03 20:00:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12831 states. [2022-03-03 20:00:44,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12831 to 7438. [2022-03-03 20:00:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7438 states, 7437 states have (on average 3.4599973107435793) internal successors, (25732), 7437 states have internal predecessors, (25732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7438 states to 7438 states and 25732 transitions. [2022-03-03 20:00:44,186 INFO L78 Accepts]: Start accepts. Automaton has 7438 states and 25732 transitions. Word has length 30 [2022-03-03 20:00:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:00:44,186 INFO L470 AbstractCegarLoop]: Abstraction has 7438 states and 25732 transitions. [2022-03-03 20:00:44,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:00:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 7438 states and 25732 transitions. [2022-03-03 20:00:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 20:00:44,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:00:44,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:00:44,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-03 20:00:44,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:44,398 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:00:44,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:00:44,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1105977056, now seen corresponding path program 48 times [2022-03-03 20:00:44,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:00:44,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055038598] [2022-03-03 20:00:44,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:00:44,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:00:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:00:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:44,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:00:44,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055038598] [2022-03-03 20:00:44,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055038598] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:00:44,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48896766] [2022-03-03 20:00:44,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:00:44,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:00:44,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:00:44,722 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:00:44,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-03 20:00:44,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:00:44,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:00:44,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:00:44,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:00:45,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:45,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2022-03-03 20:00:45,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:45,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-03-03 20:00:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:45,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:00:45,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:45,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:45,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:45,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 61 [2022-03-03 20:00:45,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:45,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:45,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:00:45,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 51 [2022-03-03 20:00:45,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:45,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-03-03 20:00:45,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:00:45,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-03-03 20:00:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:00:46,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48896766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:00:46,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:00:46,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-03-03 20:00:46,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770150293] [2022-03-03 20:00:46,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:00:46,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 20:00:46,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:00:46,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 20:00:46,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 20:00:46,001 INFO L87 Difference]: Start difference. First operand 7438 states and 25732 transitions. Second operand has 36 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) [2022-03-03 20:01:09,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:01:09,503 INFO L93 Difference]: Finished difference Result 16526 states and 54365 transitions. [2022-03-03 20:01:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2022-03-03 20:01:09,503 INFO L78 Accepts]: Start accepts. Automaton has has 36 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) Word has length 30 [2022-03-03 20:01:09,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:01:09,588 INFO L225 Difference]: With dead ends: 16526 [2022-03-03 20:01:09,588 INFO L226 Difference]: Without dead ends: 16473 [2022-03-03 20:01:09,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31631 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=9136, Invalid=63494, Unknown=0, NotChecked=0, Total=72630 [2022-03-03 20:01:09,591 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1211 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 3656 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 5362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 3656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1240 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:01:09,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 1079 Invalid, 5362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 3656 Invalid, 0 Unknown, 1240 Unchecked, 2.4s Time] [2022-03-03 20:01:09,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16473 states. [2022-03-03 20:01:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16473 to 7514. [2022-03-03 20:01:09,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7514 states, 7513 states have (on average 3.4654598695594303) internal successors, (26036), 7513 states have internal predecessors, (26036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:09,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7514 states to 7514 states and 26036 transitions. [2022-03-03 20:01:09,809 INFO L78 Accepts]: Start accepts. Automaton has 7514 states and 26036 transitions. Word has length 30 [2022-03-03 20:01:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:01:09,809 INFO L470 AbstractCegarLoop]: Abstraction has 7514 states and 26036 transitions. [2022-03-03 20:01:09,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 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) [2022-03-03 20:01:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 7514 states and 26036 transitions. [2022-03-03 20:01:09,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 20:01:09,822 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:01:09,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:01:09,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-03 20:01:10,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-03 20:01:10,022 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:01:10,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:01:10,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1637830820, now seen corresponding path program 49 times [2022-03-03 20:01:10,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:01:10,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120211658] [2022-03-03 20:01:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:01:10,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:01:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:01:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:10,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:01:10,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120211658] [2022-03-03 20:01:10,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120211658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:01:10,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853620501] [2022-03-03 20:01:10,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:01:10,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:01:10,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:01:10,363 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:01:10,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-03 20:01:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:01:10,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:01:10,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:01:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:01:10,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:10,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-03 20:01:10,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:01:10,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:10,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-03 20:01:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:10,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:01:11,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:11,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:11,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-03 20:01:11,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:11,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:11,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 20:01:11,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:11,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:11,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:11,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-03 20:01:11,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:11,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:11,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:11,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-03 20:01:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:11,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853620501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:01:11,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:01:11,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-03 20:01:11,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879283329] [2022-03-03 20:01:11,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:01:11,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 20:01:11,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:01:11,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 20:01:11,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 20:01:11,788 INFO L87 Difference]: Start difference. First operand 7514 states and 26036 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:01:17,124 INFO L93 Difference]: Finished difference Result 12709 states and 41187 transitions. [2022-03-03 20:01:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-03 20:01:17,124 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:01:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:01:17,154 INFO L225 Difference]: With dead ends: 12709 [2022-03-03 20:01:17,154 INFO L226 Difference]: Without dead ends: 12679 [2022-03-03 20:01:17,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4444 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1978, Invalid=10012, Unknown=0, NotChecked=0, Total=11990 [2022-03-03 20:01:17,155 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 489 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 2760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 593 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:01:17,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 502 Invalid, 2760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1962 Invalid, 0 Unknown, 593 Unchecked, 1.1s Time] [2022-03-03 20:01:17,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12679 states. [2022-03-03 20:01:17,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12679 to 7518. [2022-03-03 20:01:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7518 states, 7517 states have (on average 3.4661434082745775) internal successors, (26055), 7517 states have internal predecessors, (26055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7518 states to 7518 states and 26055 transitions. [2022-03-03 20:01:17,339 INFO L78 Accepts]: Start accepts. Automaton has 7518 states and 26055 transitions. Word has length 30 [2022-03-03 20:01:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:01:17,339 INFO L470 AbstractCegarLoop]: Abstraction has 7518 states and 26055 transitions. [2022-03-03 20:01:17,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:17,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7518 states and 26055 transitions. [2022-03-03 20:01:17,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 20:01:17,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:01:17,352 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:01:17,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-03 20:01:17,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-03 20:01:17,553 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:01:17,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:01:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash 505670412, now seen corresponding path program 50 times [2022-03-03 20:01:17,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:01:17,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553332339] [2022-03-03 20:01:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:01:17,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:01:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:01:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:17,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:01:17,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553332339] [2022-03-03 20:01:17,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553332339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:01:17,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460995744] [2022-03-03 20:01:17,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:01:17,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:01:17,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:01:17,889 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:01:17,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-03 20:01:17,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:01:17,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:01:17,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:01:17,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:01:18,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:18,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2022-03-03 20:01:18,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:18,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 61 [2022-03-03 20:01:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:18,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:01:18,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:18,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:19,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:19,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 61 [2022-03-03 20:01:19,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:19,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:19,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:19,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 51 [2022-03-03 20:01:19,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:19,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-03-03 20:01:19,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:01:19,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-03-03 20:01:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:19,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460995744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:01:19,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:01:19,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-03-03 20:01:19,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702620863] [2022-03-03 20:01:19,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:01:19,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 20:01:19,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:01:19,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 20:01:19,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 20:01:19,218 INFO L87 Difference]: Start difference. First operand 7518 states and 26055 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:48,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:01:48,684 INFO L93 Difference]: Finished difference Result 16334 states and 53312 transitions. [2022-03-03 20:01:48,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2022-03-03 20:01:48,685 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:01:48,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:01:48,724 INFO L225 Difference]: With dead ends: 16334 [2022-03-03 20:01:48,725 INFO L226 Difference]: Without dead ends: 16220 [2022-03-03 20:01:48,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44116 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=11557, Invalid=89249, Unknown=0, NotChecked=0, Total=100806 [2022-03-03 20:01:48,728 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1104 mSDsluCounter, 2543 mSDsCounter, 0 mSdLazyCounter, 5135 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 8335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 5135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2683 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:01:48,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1104 Valid, 1456 Invalid, 8335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 5135 Invalid, 0 Unknown, 2683 Unchecked, 3.3s Time] [2022-03-03 20:01:48,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16220 states. [2022-03-03 20:01:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16220 to 7505. [2022-03-03 20:01:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7505 states, 7504 states have (on average 3.463219616204691) internal successors, (25988), 7504 states have internal predecessors, (25988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7505 states to 7505 states and 25988 transitions. [2022-03-03 20:01:48,956 INFO L78 Accepts]: Start accepts. Automaton has 7505 states and 25988 transitions. Word has length 30 [2022-03-03 20:01:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:01:48,956 INFO L470 AbstractCegarLoop]: Abstraction has 7505 states and 25988 transitions. [2022-03-03 20:01:48,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 7505 states and 25988 transitions. [2022-03-03 20:01:48,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 20:01:48,969 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:01:48,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:01:48,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-03 20:01:49,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:01:49,171 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:01:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:01:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1362135974, now seen corresponding path program 51 times [2022-03-03 20:01:49,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:01:49,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769417859] [2022-03-03 20:01:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:01:49,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:01:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:01:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:49,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:01:49,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769417859] [2022-03-03 20:01:49,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769417859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:01:49,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230835052] [2022-03-03 20:01:49,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:01:49,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:01:49,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:01:49,517 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:01:49,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-03 20:01:49,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:01:49,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:01:49,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:01:49,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:01:49,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:49,873 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 31 treesize of output 47 [2022-03-03 20:01:49,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:49,891 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 79 treesize of output 87 [2022-03-03 20:01:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:50,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:01:50,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:50,786 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 60 treesize of output 93 [2022-03-03 20:01:50,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:50,813 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 77 [2022-03-03 20:01:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:51,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230835052] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:01:51,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:01:51,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-03 20:01:51,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649442161] [2022-03-03 20:01:51,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:01:51,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 20:01:51,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:01:51,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 20:01:51,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:01:51,890 INFO L87 Difference]: Start difference. First operand 7505 states and 25988 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:58,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:01:58,524 INFO L93 Difference]: Finished difference Result 16709 states and 56534 transitions. [2022-03-03 20:01:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-03 20:01:58,525 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 20:01:58,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:01:58,566 INFO L225 Difference]: With dead ends: 16709 [2022-03-03 20:01:58,566 INFO L226 Difference]: Without dead ends: 16630 [2022-03-03 20:01:58,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7115 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2654, Invalid=14902, Unknown=0, NotChecked=0, Total=17556 [2022-03-03 20:01:58,567 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 622 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1159 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:01:58,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 404 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1642 Invalid, 0 Unknown, 1159 Unchecked, 1.1s Time] [2022-03-03 20:01:58,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16630 states. [2022-03-03 20:01:58,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16630 to 7559. [2022-03-03 20:01:58,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7559 states, 7558 states have (on average 3.463614712887007) internal successors, (26178), 7558 states have internal predecessors, (26178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:58,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7559 states to 7559 states and 26178 transitions. [2022-03-03 20:01:58,791 INFO L78 Accepts]: Start accepts. Automaton has 7559 states and 26178 transitions. Word has length 30 [2022-03-03 20:01:58,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:01:58,791 INFO L470 AbstractCegarLoop]: Abstraction has 7559 states and 26178 transitions. [2022-03-03 20:01:58,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:01:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand 7559 states and 26178 transitions. [2022-03-03 20:01:58,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 20:01:58,804 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:01:58,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:01:58,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-03 20:01:59,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:01:59,005 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:01:59,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:01:59,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1538721804, now seen corresponding path program 52 times [2022-03-03 20:01:59,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:01:59,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255847960] [2022-03-03 20:01:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:01:59,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:01:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:01:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:59,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:01:59,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255847960] [2022-03-03 20:01:59,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255847960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:01:59,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626189201] [2022-03-03 20:01:59,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:01:59,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:01:59,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:01:59,329 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:01:59,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-03 20:01:59,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:01:59,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:01:59,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:01:59,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:01:59,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:01:59,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:59,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2022-03-03 20:01:59,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:01:59,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:01:59,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 26 [2022-03-03 20:01:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:01:59,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:00,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:00,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:00,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 68 [2022-03-03 20:02:00,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:00,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:00,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-03 20:02:00,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:00,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:00,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:00,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 61 [2022-03-03 20:02:00,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:00,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:00,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:00,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 51 [2022-03-03 20:02:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:00,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626189201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:00,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:00,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-03 20:02:00,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32021758] [2022-03-03 20:02:00,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:00,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 20:02:00,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:00,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 20:02:00,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:02:00,673 INFO L87 Difference]: Start difference. First operand 7559 states and 26178 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:06,934 INFO L93 Difference]: Finished difference Result 13585 states and 43889 transitions. [2022-03-03 20:02:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-03 20:02:06,934 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 20:02:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:06,975 INFO L225 Difference]: With dead ends: 13585 [2022-03-03 20:02:06,976 INFO L226 Difference]: Without dead ends: 13507 [2022-03-03 20:02:06,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5084 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2156, Invalid=11416, Unknown=0, NotChecked=0, Total=13572 [2022-03-03 20:02:06,977 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 506 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 2824 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 3553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 2824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:06,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 687 Invalid, 3553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 2824 Invalid, 0 Unknown, 506 Unchecked, 1.5s Time] [2022-03-03 20:02:06,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13507 states. [2022-03-03 20:02:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13507 to 7582. [2022-03-03 20:02:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7581 states have (on average 3.4618124258013454) internal successors, (26244), 7581 states have internal predecessors, (26244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 26244 transitions. [2022-03-03 20:02:07,180 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 26244 transitions. Word has length 30 [2022-03-03 20:02:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:07,180 INFO L470 AbstractCegarLoop]: Abstraction has 7582 states and 26244 transitions. [2022-03-03 20:02:07,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 26244 transitions. [2022-03-03 20:02:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 20:02:07,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:07,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:07,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-03 20:02:07,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-03 20:02:07,393 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:07,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:07,394 INFO L85 PathProgramCache]: Analyzing trace with hash 983099671, now seen corresponding path program 47 times [2022-03-03 20:02:07,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:07,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642669761] [2022-03-03 20:02:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:07,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:07,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:07,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642669761] [2022-03-03 20:02:07,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642669761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:07,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478856353] [2022-03-03 20:02:07,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:02:07,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:07,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:07,830 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:02:07,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-03 20:02:07,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:02:07,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:07,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:02:07,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:08,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:08,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:08,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:08,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2022-03-03 20:02:08,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:08,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:08,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:08,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2022-03-03 20:02:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:08,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:08,514 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:02:08,515 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 38 treesize of output 63 [2022-03-03 20:02:08,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:08,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:08,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:08,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-03 20:02:08,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:08,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:08,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:08,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 20:02:08,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:08,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:08,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:08,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 20:02:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:08,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478856353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:08,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:08,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-03-03 20:02:08,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106345728] [2022-03-03 20:02:08,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:08,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 20:02:08,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:08,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 20:02:08,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:02:08,733 INFO L87 Difference]: Start difference. First operand 7582 states and 26244 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:17,313 INFO L93 Difference]: Finished difference Result 11688 states and 38988 transitions. [2022-03-03 20:02:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-03 20:02:17,314 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:02:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:17,339 INFO L225 Difference]: With dead ends: 11688 [2022-03-03 20:02:17,340 INFO L226 Difference]: Without dead ends: 11594 [2022-03-03 20:02:17,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8229 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2731, Invalid=19025, Unknown=0, NotChecked=0, Total=21756 [2022-03-03 20:02:17,341 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 472 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 3832 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 4231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 3832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:17,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 740 Invalid, 4231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 3832 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-03 20:02:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11594 states. [2022-03-03 20:02:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11594 to 7602. [2022-03-03 20:02:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7602 states, 7601 states have (on average 3.4592816734640177) internal successors, (26294), 7601 states have internal predecessors, (26294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:17,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7602 states to 7602 states and 26294 transitions. [2022-03-03 20:02:17,507 INFO L78 Accepts]: Start accepts. Automaton has 7602 states and 26294 transitions. Word has length 30 [2022-03-03 20:02:17,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:17,508 INFO L470 AbstractCegarLoop]: Abstraction has 7602 states and 26294 transitions. [2022-03-03 20:02:17,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:17,508 INFO L276 IsEmpty]: Start isEmpty. Operand 7602 states and 26294 transitions. [2022-03-03 20:02:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 20:02:17,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:17,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:17,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-03 20:02:17,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:17,721 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:17,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:17,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2041248553, now seen corresponding path program 48 times [2022-03-03 20:02:17,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:17,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166305078] [2022-03-03 20:02:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:17,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:18,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:18,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166305078] [2022-03-03 20:02:18,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166305078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:18,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604308046] [2022-03-03 20:02:18,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:02:18,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:18,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:18,094 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:02:18,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-03 20:02:18,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:02:18,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:02:18,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:02:18,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:18,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:18,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:18,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:18,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:18,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 66 [2022-03-03 20:02:18,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:18,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:18,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:18,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:18,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 117 [2022-03-03 20:02:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:18,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:18,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:18,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:18,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:18,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:18,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2022-03-03 20:02:18,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:18,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:18,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:18,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:18,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 45 [2022-03-03 20:02:19,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:19,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:19,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:19,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 20:02:19,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:19,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:19,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 20:02:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:19,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604308046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:19,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:19,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-03-03 20:02:19,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597788350] [2022-03-03 20:02:19,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:19,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 20:02:19,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:19,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 20:02:19,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 20:02:19,116 INFO L87 Difference]: Start difference. First operand 7602 states and 26294 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:28,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:02:28,019 INFO L93 Difference]: Finished difference Result 13282 states and 44055 transitions. [2022-03-03 20:02:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-03 20:02:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 20:02:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:02:28,051 INFO L225 Difference]: With dead ends: 13282 [2022-03-03 20:02:28,051 INFO L226 Difference]: Without dead ends: 13167 [2022-03-03 20:02:28,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9094 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3232, Invalid=22850, Unknown=0, NotChecked=0, Total=26082 [2022-03-03 20:02:28,053 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 773 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 4961 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 5692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 4961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:28,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1173 Invalid, 5692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 4961 Invalid, 0 Unknown, 433 Unchecked, 2.5s Time] [2022-03-03 20:02:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13167 states. [2022-03-03 20:02:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13167 to 7713. [2022-03-03 20:02:28,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7713 states, 7712 states have (on average 3.454616182572614) internal successors, (26642), 7712 states have internal predecessors, (26642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:28,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7713 states to 7713 states and 26642 transitions. [2022-03-03 20:02:28,292 INFO L78 Accepts]: Start accepts. Automaton has 7713 states and 26642 transitions. Word has length 30 [2022-03-03 20:02:28,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:02:28,292 INFO L470 AbstractCegarLoop]: Abstraction has 7713 states and 26642 transitions. [2022-03-03 20:02:28,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:02:28,292 INFO L276 IsEmpty]: Start isEmpty. Operand 7713 states and 26642 transitions. [2022-03-03 20:02:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 20:02:28,305 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:02:28,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:02:28,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-03 20:02:28,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-03 20:02:28,507 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:02:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:02:28,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2118966875, now seen corresponding path program 49 times [2022-03-03 20:02:28,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:02:28,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579132338] [2022-03-03 20:02:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:02:28,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:02:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:28,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:02:28,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579132338] [2022-03-03 20:02:28,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579132338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:02:28,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483841031] [2022-03-03 20:02:28,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:02:28,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:02:28,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:02:28,945 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:02:28,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-03 20:02:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:02:28,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:02:28,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:02:29,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:29,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:29,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:29,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-03 20:02:29,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:29,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:29,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:29,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2022-03-03 20:02:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:29,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:02:29,709 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:02:29,709 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 38 treesize of output 63 [2022-03-03 20:02:29,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:29,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:29,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:02:29,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-03 20:02:29,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:29,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:29,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:29,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 20:02:29,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:29,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:02:29,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:02:29,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 20:02:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:02:29,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483841031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:02:29,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:02:29,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-03-03 20:02:29,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188293769] [2022-03-03 20:02:29,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:02:29,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 20:02:29,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:02:29,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 20:02:29,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:02:29,929 INFO L87 Difference]: Start difference. First operand 7713 states and 26642 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-03 20:02:34,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 20:02:34,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2569 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1353, Invalid=7019, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 20:02:34,188 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 260 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:02:34,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 135 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1768 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:02:34,189 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-03 20:02:34,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-03 20:02:34,208 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 20:02:34,208 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 [2022-03-03 20:02:34,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-03 20:02:34,390 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (7713states) and FLOYD_HOARE automaton (currently 69 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 92 known predicates. [2022-03-03 20:02:34,391 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-03 20:02:34,392 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-03 20:02:34,392 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-03 20:02:34,394 INFO L732 BasicCegarLoop]: Path program histogram: [52, 49, 1, 1, 1] [2022-03-03 20:02:34,396 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 20:02:34,396 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 20:02:34,398 INFO L202 PluginConnector]: Adding new model array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 08:02:34 BasicIcfg [2022-03-03 20:02:34,398 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 20:02:34,398 INFO L158 Benchmark]: Toolchain (without parser) took 725633.76ms. Allocated memory was 188.7MB in the beginning and 901.8MB in the end (delta: 713.0MB). Free memory was 144.9MB in the beginning and 174.4MB in the end (delta: -29.4MB). Peak memory consumption was 684.1MB. Max. memory is 8.0GB. [2022-03-03 20:02:34,398 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 188.7MB. Free memory was 146.1MB in the beginning and 145.9MB in the end (delta: 153.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:02:34,398 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.23ms. Allocated memory is still 188.7MB. Free memory was 144.8MB in the beginning and 143.2MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-03 20:02:34,398 INFO L158 Benchmark]: Boogie Preprocessor took 13.63ms. Allocated memory is still 188.7MB. Free memory was 143.2MB in the beginning and 142.3MB in the end (delta: 893.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:02:34,398 INFO L158 Benchmark]: RCFGBuilder took 208.31ms. Allocated memory is still 188.7MB. Free memory was 142.2MB in the beginning and 133.1MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-03 20:02:34,398 INFO L158 Benchmark]: TraceAbstraction took 725356.76ms. Allocated memory was 188.7MB in the beginning and 901.8MB in the end (delta: 713.0MB). Free memory was 132.6MB in the beginning and 174.4MB in the end (delta: -41.8MB). Peak memory consumption was 670.5MB. Max. memory is 8.0GB. [2022-03-03 20:02:34,399 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 0.14ms. Allocated memory is still 188.7MB. Free memory was 146.1MB in the beginning and 145.9MB in the end (delta: 153.3kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.23ms. Allocated memory is still 188.7MB. Free memory was 144.8MB in the beginning and 143.2MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.63ms. Allocated memory is still 188.7MB. Free memory was 143.2MB in the beginning and 142.3MB in the end (delta: 893.4kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 208.31ms. Allocated memory is still 188.7MB. Free memory was 142.2MB in the beginning and 133.1MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 725356.76ms. Allocated memory was 188.7MB in the beginning and 901.8MB in the end (delta: 713.0MB). Free memory was 132.6MB in the beginning and 174.4MB in the end (delta: -41.8MB). Peak memory consumption was 670.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (7713states) and FLOYD_HOARE automaton (currently 69 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 92 known predicates. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (7713states) and FLOYD_HOARE automaton (currently 69 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 92 known predicates. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (7713states) and FLOYD_HOARE automaton (currently 69 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 92 known predicates. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (7713states) and FLOYD_HOARE automaton (currently 69 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 92 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 725.2s, OverallIterations: 104, TraceHistogramMax: 2, PathProgramHistogramMax: 52, EmptinessCheckTime: 0.7s, AutomataDifference: 567.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 55336 SdHoareTripleChecker+Valid, 116.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 55336 mSDsluCounter, 50494 SdHoareTripleChecker+Invalid, 99.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 31772 IncrementalHoareTripleChecker+Unchecked, 89581 mSDsCounter, 20652 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 213409 IncrementalHoareTripleChecker+Invalid, 265833 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20652 mSolverCounterUnsat, 3457 mSDtfsCounter, 213409 mSolverCounterSat, 0.7s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14904 GetRequests, 4342 SyntacticMatches, 389 SemanticMatches, 10172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665814 ImplicationChecksByTransitivity, 475.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7713occurred in iteration=103, InterpolantAutomatonStates: 8467, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 11.2s AutomataMinimizationTime, 103 MinimizatonAttempts, 450803 StatesRemovedByMinimization, 103 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 121.8s InterpolantComputationTime, 5868 NumberOfCodeBlocks, 5853 NumberOfCodeBlocksAsserted, 321 NumberOfCheckSat, 8466 ConstructedInterpolants, 228 QuantifiedInterpolants, 166326 SizeOfPredicates, 1396 NumberOfNonLiveVariables, 6426 ConjunctsInSsa, 1987 ConjunctsInUnsatCore, 306 InterpolantComputations, 3 PerfectInterpolantSequences, 216/2060 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