/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/buffer-mult.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:50:29,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:50:29,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:50:29,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:50:29,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 19:50:29,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 19:50:29,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 19:50:29,121 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 19:50:29,150 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:50:29,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:50:29,151 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:50:29,151 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:50:29,152 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:50:29,152 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:50:29,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:50:29,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:50:29,152 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:50:29,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:50:29,153 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:50:29,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:50:29,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:50:29,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:50:29,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:50:29,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:50:29,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:50:29,154 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:50:29,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:50:29,154 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:50:29,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:50:29,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:50:29,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:50:29,154 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:50:29,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:50:29,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:50:29,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:50:29,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:50:29,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:50:29,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:50:29,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:50:29,155 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:50:29,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:50:29,156 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:50:29,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:50:29,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:50:29,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:50:29,348 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:50:29,349 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:50:29,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-mult.wvr.bpl [2022-03-03 19:50:29,350 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-mult.wvr.bpl' [2022-03-03 19:50:29,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:50:29,371 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:50:29,372 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:50:29,372 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:50:29,372 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:50:29,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:29" (1/1) ... [2022-03-03 19:50:29,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:29" (1/1) ... [2022-03-03 19:50:29,394 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:50:29,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:50:29,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:50:29,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:50:29,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:50:29,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:29" (1/1) ... [2022-03-03 19:50:29,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:29" (1/1) ... [2022-03-03 19:50:29,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:29" (1/1) ... [2022-03-03 19:50:29,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:29" (1/1) ... [2022-03-03 19:50:29,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:29" (1/1) ... [2022-03-03 19:50:29,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:29" (1/1) ... [2022-03-03 19:50:29,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:29" (1/1) ... [2022-03-03 19:50:29,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:50:29,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:50:29,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:50:29,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:50:29,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:29" (1/1) ... [2022-03-03 19:50:29,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:50:29,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:29,432 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 19:50:29,454 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 19:50:29,471 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:50:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:50:29,471 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:50:29,471 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:50:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:50:29,471 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:50:29,471 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:50:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:50:29,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:50:29,472 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:50:29,472 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:50:29,472 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:50:29,472 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-03 19:50:29,472 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-03 19:50:29,472 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-03 19:50:29,473 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 19:50:29,509 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:50:29,510 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:50:29,595 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:50:29,613 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:50:29,614 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:50:29,625 INFO L202 PluginConnector]: Adding new model buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:50:29 BoogieIcfgContainer [2022-03-03 19:50:29,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:50:29,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:50:29,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:50:29,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:50:29,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:50:29" (1/2) ... [2022-03-03 19:50:29,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4173a9e9 and model type buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:50:29, skipping insertion in model container [2022-03-03 19:50:29,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:50:29" (2/2) ... [2022-03-03 19:50:29,642 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult.wvr.bpl [2022-03-03 19:50:29,646 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:50:29,646 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:50:29,646 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:50:29,646 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:50:29,731 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-03 19:50:29,771 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:50:29,776 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 19:50:29,776 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-03 19:50:29,793 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2022-03-03 19:50:29,887 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:29,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:50:29,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:29,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:29,912 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:29,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1445873811, now seen corresponding path program 1 times [2022-03-03 19:50:29,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:29,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844691898] [2022-03-03 19:50:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:29,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:30,044 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 19:50:30,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:30,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844691898] [2022-03-03 19:50:30,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844691898] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:50:30,046 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:50:30,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:50:30,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425442805] [2022-03-03 19:50:30,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:50:30,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:50:30,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:30,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:50:30,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:50:30,079 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:30,155 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2022-03-03 19:50:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:50:30,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 19:50:30,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:30,198 INFO L225 Difference]: With dead ends: 1236 [2022-03-03 19:50:30,198 INFO L226 Difference]: Without dead ends: 1109 [2022-03-03 19:50:30,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 19:50:30,205 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:30,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:50:30,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-03-03 19:50:30,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2022-03-03 19:50:30,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2022-03-03 19:50:30,355 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2022-03-03 19:50:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:30,356 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2022-03-03 19:50:30,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2022-03-03 19:50:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:50:30,362 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:30,362 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 19:50:30,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:50:30,362 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:30,363 INFO L85 PathProgramCache]: Analyzing trace with hash 925045909, now seen corresponding path program 1 times [2022-03-03 19:50:30,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:30,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236090210] [2022-03-03 19:50:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:30,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:30,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:30,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236090210] [2022-03-03 19:50:30,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236090210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:50:30,425 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:50:30,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:50:30,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8855801] [2022-03-03 19:50:30,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:50:30,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:50:30,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:30,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:50:30,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:50:30,427 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 19:50:30,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:30,514 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2022-03-03 19:50:30,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:50:30,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 19:50:30,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:30,524 INFO L225 Difference]: With dead ends: 1524 [2022-03-03 19:50:30,525 INFO L226 Difference]: Without dead ends: 1418 [2022-03-03 19:50:30,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:50:30,533 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:30,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2022-03-03 19:50:30,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2022-03-03 19:50:30,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2022-03-03 19:50:30,592 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2022-03-03 19:50:30,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:30,592 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2022-03-03 19:50:30,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 19:50:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2022-03-03 19:50:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:50:30,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:30,598 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 19:50:30,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 19:50:30,599 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:30,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1282496465, now seen corresponding path program 1 times [2022-03-03 19:50:30,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:30,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923559494] [2022-03-03 19:50:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:30,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:30,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:30,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923559494] [2022-03-03 19:50:30,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923559494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:50:30,705 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:50:30,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:50:30,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943553891] [2022-03-03 19:50:30,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:50:30,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:50:30,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:30,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:50:30,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:50:30,709 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 19:50:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:30,813 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2022-03-03 19:50:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:50:30,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 19:50:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:30,827 INFO L225 Difference]: With dead ends: 2017 [2022-03-03 19:50:30,827 INFO L226 Difference]: Without dead ends: 1875 [2022-03-03 19:50:30,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:50:30,833 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:30,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:30,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-03-03 19:50:30,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2022-03-03 19:50:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2022-03-03 19:50:30,900 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2022-03-03 19:50:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:30,900 INFO L470 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2022-03-03 19:50:30,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 19:50:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2022-03-03 19:50:30,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:50:30,906 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:30,906 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 19:50:30,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:50:30,907 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:30,908 INFO L85 PathProgramCache]: Analyzing trace with hash 770950601, now seen corresponding path program 1 times [2022-03-03 19:50:30,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:30,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221437598] [2022-03-03 19:50:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:30,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:30,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:30,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221437598] [2022-03-03 19:50:30,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221437598] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:30,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443565495] [2022-03-03 19:50:30,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:30,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:30,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:30,979 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 19:50:30,988 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 19:50:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:31,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:50:31,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:31,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:31,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443565495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:31,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:31,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-03-03 19:50:31,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789926534] [2022-03-03 19:50:31,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:31,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:50:31,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:31,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:50:31,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:50:31,266 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:31,447 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2022-03-03 19:50:31,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:50:31,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:50:31,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:31,460 INFO L225 Difference]: With dead ends: 2308 [2022-03-03 19:50:31,460 INFO L226 Difference]: Without dead ends: 2108 [2022-03-03 19:50:31,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:50:31,463 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:31,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 54 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:31,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2022-03-03 19:50:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2022-03-03 19:50:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:31,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2022-03-03 19:50:31,517 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2022-03-03 19:50:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:31,518 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2022-03-03 19:50:31,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2022-03-03 19:50:31,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:50:31,522 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:31,522 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 19:50:31,548 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 19:50:31,745 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 19:50:31,745 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:31,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:31,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1120776452, now seen corresponding path program 1 times [2022-03-03 19:50:31,747 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:31,747 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620535724] [2022-03-03 19:50:31,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:31,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:31,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:31,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620535724] [2022-03-03 19:50:31,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620535724] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:50:31,794 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:50:31,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:50:31,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667971354] [2022-03-03 19:50:31,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:50:31,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:50:31,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:31,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:50:31,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:50:31,795 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:31,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:31,891 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2022-03-03 19:50:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:50:31,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:50:31,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:31,903 INFO L225 Difference]: With dead ends: 1950 [2022-03-03 19:50:31,903 INFO L226 Difference]: Without dead ends: 1860 [2022-03-03 19:50:31,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 19:50:31,904 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 64 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:31,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 17 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:31,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-03-03 19:50:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2022-03-03 19:50:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2022-03-03 19:50:31,972 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2022-03-03 19:50:31,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:31,973 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2022-03-03 19:50:31,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:31,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2022-03-03 19:50:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:50:31,982 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:31,982 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 19:50:31,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-03 19:50:31,983 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:31,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:31,983 INFO L85 PathProgramCache]: Analyzing trace with hash 712551812, now seen corresponding path program 2 times [2022-03-03 19:50:31,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:31,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68786126] [2022-03-03 19:50:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:31,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:32,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:32,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68786126] [2022-03-03 19:50:32,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68786126] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:50:32,022 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:50:32,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:50:32,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108061690] [2022-03-03 19:50:32,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:50:32,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:50:32,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:32,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:50:32,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:50:32,025 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:32,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:32,098 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2022-03-03 19:50:32,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:50:32,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:50:32,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:32,106 INFO L225 Difference]: With dead ends: 1308 [2022-03-03 19:50:32,106 INFO L226 Difference]: Without dead ends: 1308 [2022-03-03 19:50:32,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 19:50:32,108 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:32,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:32,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-03-03 19:50:32,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2022-03-03 19:50:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2022-03-03 19:50:32,143 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2022-03-03 19:50:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:32,143 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2022-03-03 19:50:32,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2022-03-03 19:50:32,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:50:32,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:32,146 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 19:50:32,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-03 19:50:32,147 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:32,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:32,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1043177095, now seen corresponding path program 2 times [2022-03-03 19:50:32,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:32,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064772871] [2022-03-03 19:50:32,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:32,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:32,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:32,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064772871] [2022-03-03 19:50:32,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064772871] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:50:32,197 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:50:32,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:50:32,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931396771] [2022-03-03 19:50:32,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:50:32,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:50:32,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:32,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:50:32,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:50:32,199 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:32,264 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2022-03-03 19:50:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:50:32,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:50:32,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:32,271 INFO L225 Difference]: With dead ends: 1142 [2022-03-03 19:50:32,271 INFO L226 Difference]: Without dead ends: 1120 [2022-03-03 19:50:32,271 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 19:50:32,272 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:32,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:32,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-03-03 19:50:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2022-03-03 19:50:32,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2022-03-03 19:50:32,303 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2022-03-03 19:50:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:32,303 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2022-03-03 19:50:32,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2022-03-03 19:50:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:32,306 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:32,306 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 19:50:32,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-03 19:50:32,307 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:32,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:32,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2066683916, now seen corresponding path program 1 times [2022-03-03 19:50:32,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:32,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806698963] [2022-03-03 19:50:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:32,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:50:32,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:32,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806698963] [2022-03-03 19:50:32,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806698963] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:50:32,338 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:50:32,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:50:32,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238086996] [2022-03-03 19:50:32,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:50:32,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:50:32,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:32,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:50:32,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:50:32,340 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:32,385 INFO L93 Difference]: Finished difference Result 1334 states and 4929 transitions. [2022-03-03 19:50:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:50:32,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:32,393 INFO L225 Difference]: With dead ends: 1334 [2022-03-03 19:50:32,393 INFO L226 Difference]: Without dead ends: 1334 [2022-03-03 19:50:32,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:50:32,394 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:32,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:50:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2022-03-03 19:50:32,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 954. [2022-03-03 19:50:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.63903462749213) internal successors, (3468), 953 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3468 transitions. [2022-03-03 19:50:32,423 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3468 transitions. Word has length 27 [2022-03-03 19:50:32,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:32,425 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 3468 transitions. [2022-03-03 19:50:32,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:32,425 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3468 transitions. [2022-03-03 19:50:32,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:32,428 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:32,429 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 19:50:32,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-03 19:50:32,429 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:32,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:32,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1787495248, now seen corresponding path program 1 times [2022-03-03 19:50:32,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:32,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949247763] [2022-03-03 19:50:32,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:32,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:32,455 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 19:50:32,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:32,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949247763] [2022-03-03 19:50:32,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949247763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:32,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311469376] [2022-03-03 19:50:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:32,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:32,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:32,460 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 19:50:32,493 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 19:50:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:32,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 19:50:32,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:32,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 19:50:32,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311469376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:50:32,557 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 19:50:32,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-03-03 19:50:32,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516805170] [2022-03-03 19:50:32,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:50:32,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:50:32,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:32,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:50:32,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:50:32,559 INFO L87 Difference]: Start difference. First operand 954 states and 3468 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:32,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:32,594 INFO L93 Difference]: Finished difference Result 1658 states and 5999 transitions. [2022-03-03 19:50:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:50:32,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:32,612 INFO L225 Difference]: With dead ends: 1658 [2022-03-03 19:50:32,613 INFO L226 Difference]: Without dead ends: 1658 [2022-03-03 19:50:32,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 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 19:50:32,613 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:32,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:50:32,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2022-03-03 19:50:32,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1112. [2022-03-03 19:50:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.667866786678668) internal successors, (4075), 1111 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:32,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4075 transitions. [2022-03-03 19:50:32,667 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4075 transitions. Word has length 27 [2022-03-03 19:50:32,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:32,668 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 4075 transitions. [2022-03-03 19:50:32,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:32,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4075 transitions. [2022-03-03 19:50:32,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:50:32,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:32,671 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, 1, 1] [2022-03-03 19:50:32,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-03 19:50:32,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-03 19:50:32,884 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:32,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:32,885 INFO L85 PathProgramCache]: Analyzing trace with hash -383422002, now seen corresponding path program 1 times [2022-03-03 19:50:32,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:32,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781272749] [2022-03-03 19:50:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:32,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:33,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:33,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781272749] [2022-03-03 19:50:33,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781272749] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:33,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134751016] [2022-03-03 19:50:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:33,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:33,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:33,032 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 19:50:33,066 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 19:50:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:33,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:50:33,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:33,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-03 19:50:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:33,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:33,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:33,452 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 26 [2022-03-03 19:50:33,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:33,587 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 9 treesize of output 14 [2022-03-03 19:50:33,602 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 9 treesize of output 3 [2022-03-03 19:50:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:33,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134751016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:33,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:33,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-03 19:50:33,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164204085] [2022-03-03 19:50:33,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:33,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 19:50:33,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:33,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 19:50:33,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:50:33,623 INFO L87 Difference]: Start difference. First operand 1112 states and 4075 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:33,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:33,770 INFO L93 Difference]: Finished difference Result 2387 states and 8904 transitions. [2022-03-03 19:50:33,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:50:33,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:50:33,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:33,780 INFO L225 Difference]: With dead ends: 2387 [2022-03-03 19:50:33,780 INFO L226 Difference]: Without dead ends: 2308 [2022-03-03 19:50:33,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:50:33,780 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:33,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 193 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-03-03 19:50:33,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1550. [2022-03-03 19:50:33,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.7140090380890896) internal successors, (5753), 1549 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5753 transitions. [2022-03-03 19:50:33,840 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5753 transitions. Word has length 29 [2022-03-03 19:50:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:33,841 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5753 transitions. [2022-03-03 19:50:33,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5753 transitions. [2022-03-03 19:50:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:50:33,846 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:33,846 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, 1, 1] [2022-03-03 19:50:33,871 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 19:50:34,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:34,060 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:34,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:34,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1158240516, now seen corresponding path program 2 times [2022-03-03 19:50:34,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:34,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873651650] [2022-03-03 19:50:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:34,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:34,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:34,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873651650] [2022-03-03 19:50:34,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873651650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:34,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440719500] [2022-03-03 19:50:34,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:50:34,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:34,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:34,170 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 19:50:34,195 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 19:50:34,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:50:34,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:34,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:50:34,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:34,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2022-03-03 19:50:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:34,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:34,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:34,495 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 30 treesize of output 32 [2022-03-03 19:50:34,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:34,583 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 9 treesize of output 14 [2022-03-03 19:50:34,597 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 9 treesize of output 3 [2022-03-03 19:50:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:34,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440719500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:34,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:34,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-03-03 19:50:34,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113067004] [2022-03-03 19:50:34,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:34,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:50:34,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:34,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:50:34,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:50:34,628 INFO L87 Difference]: Start difference. First operand 1550 states and 5753 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:34,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:34,763 INFO L93 Difference]: Finished difference Result 2792 states and 10515 transitions. [2022-03-03 19:50:34,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:50:34,763 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:50:34,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:34,774 INFO L225 Difference]: With dead ends: 2792 [2022-03-03 19:50:34,774 INFO L226 Difference]: Without dead ends: 2713 [2022-03-03 19:50:34,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:50:34,775 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 93 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:34,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 172 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-03-03 19:50:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 1749. [2022-03-03 19:50:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.7299771167048057) internal successors, (6520), 1748 states have internal predecessors, (6520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6520 transitions. [2022-03-03 19:50:34,824 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6520 transitions. Word has length 29 [2022-03-03 19:50:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:34,825 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 6520 transitions. [2022-03-03 19:50:34,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:34,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6520 transitions. [2022-03-03 19:50:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:50:34,830 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:34,830 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, 1, 1] [2022-03-03 19:50:34,855 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 19:50:35,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:35,052 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:35,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:35,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1824203434, now seen corresponding path program 3 times [2022-03-03 19:50:35,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:35,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572193203] [2022-03-03 19:50:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:35,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:35,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:35,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572193203] [2022-03-03 19:50:35,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572193203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:35,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527177601] [2022-03-03 19:50:35,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:50:35,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:35,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:35,135 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 19:50:35,137 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 19:50:35,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:50:35,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:35,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:50:35,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:35,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-03 19:50:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:35,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:35,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:35,466 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 30 treesize of output 32 [2022-03-03 19:50:35,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:35,544 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 9 treesize of output 14 [2022-03-03 19:50:35,558 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 9 treesize of output 3 [2022-03-03 19:50:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:35,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527177601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:35,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:35,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-03-03 19:50:35,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520328262] [2022-03-03 19:50:35,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:35,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:50:35,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:35,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:50:35,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:50:35,579 INFO L87 Difference]: Start difference. First operand 1749 states and 6520 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 19:50:35,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:35,686 INFO L93 Difference]: Finished difference Result 2570 states and 9639 transitions. [2022-03-03 19:50:35,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:50:35,686 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 29 [2022-03-03 19:50:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:35,695 INFO L225 Difference]: With dead ends: 2570 [2022-03-03 19:50:35,695 INFO L226 Difference]: Without dead ends: 2491 [2022-03-03 19:50:35,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:50:35,696 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 94 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:35,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 160 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:35,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2022-03-03 19:50:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1887. [2022-03-03 19:50:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.7338282078472957) internal successors, (7042), 1886 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 7042 transitions. [2022-03-03 19:50:35,744 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 7042 transitions. Word has length 29 [2022-03-03 19:50:35,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:35,744 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 7042 transitions. [2022-03-03 19:50:35,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 19:50:35,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 7042 transitions. [2022-03-03 19:50:35,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:50:35,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:35,750 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, 1, 1] [2022-03-03 19:50:35,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:35,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-03 19:50:35,967 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:35,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:35,967 INFO L85 PathProgramCache]: Analyzing trace with hash -614164824, now seen corresponding path program 4 times [2022-03-03 19:50:35,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:35,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157083133] [2022-03-03 19:50:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:35,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:36,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:36,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157083133] [2022-03-03 19:50:36,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157083133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:36,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173872962] [2022-03-03 19:50:36,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:50:36,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:36,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:36,055 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 19:50:36,088 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 19:50:36,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:50:36,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:36,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:50:36,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:36,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-03 19:50:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:36,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:36,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:36,382 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 28 treesize of output 30 [2022-03-03 19:50:36,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:36,422 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 9 treesize of output 14 [2022-03-03 19:50:36,434 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 9 treesize of output 3 [2022-03-03 19:50:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:36,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173872962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:36,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:36,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-03-03 19:50:36,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661194615] [2022-03-03 19:50:36,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:36,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:50:36,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:36,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:50:36,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:50:36,484 INFO L87 Difference]: Start difference. First operand 1887 states and 7042 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:36,649 INFO L93 Difference]: Finished difference Result 2992 states and 11283 transitions. [2022-03-03 19:50:36,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:50:36,649 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:50:36,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:36,659 INFO L225 Difference]: With dead ends: 2992 [2022-03-03 19:50:36,659 INFO L226 Difference]: Without dead ends: 2913 [2022-03-03 19:50:36,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:50:36,660 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 59 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:36,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 219 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:36,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2022-03-03 19:50:36,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2081. [2022-03-03 19:50:36,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.751923076923077) internal successors, (7804), 2080 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7804 transitions. [2022-03-03 19:50:36,713 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7804 transitions. Word has length 29 [2022-03-03 19:50:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:36,714 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 7804 transitions. [2022-03-03 19:50:36,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7804 transitions. [2022-03-03 19:50:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:50:36,720 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:36,720 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, 1, 1] [2022-03-03 19:50:36,744 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 19:50:36,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:36,939 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:36,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:36,940 INFO L85 PathProgramCache]: Analyzing trace with hash -357509362, now seen corresponding path program 5 times [2022-03-03 19:50:36,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:36,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959492406] [2022-03-03 19:50:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:36,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:37,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:37,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959492406] [2022-03-03 19:50:37,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959492406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:37,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802681568] [2022-03-03 19:50:37,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:50:37,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:37,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:37,017 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 19:50:37,046 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 19:50:37,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:50:37,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:37,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:50:37,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:37,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-03-03 19:50:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:37,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:37,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:37,353 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 28 treesize of output 30 [2022-03-03 19:50:37,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:37,385 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 9 treesize of output 14 [2022-03-03 19:50:37,399 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 9 treesize of output 3 [2022-03-03 19:50:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:37,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802681568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:37,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:37,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-03-03 19:50:37,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752115345] [2022-03-03 19:50:37,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:37,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:50:37,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:37,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:50:37,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:50:37,447 INFO L87 Difference]: Start difference. First operand 2081 states and 7804 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:37,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:37,624 INFO L93 Difference]: Finished difference Result 2770 states and 10407 transitions. [2022-03-03 19:50:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:50:37,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:50:37,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:37,634 INFO L225 Difference]: With dead ends: 2770 [2022-03-03 19:50:37,634 INFO L226 Difference]: Without dead ends: 2691 [2022-03-03 19:50:37,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:50:37,635 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 57 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:37,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 207 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2022-03-03 19:50:37,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 1882. [2022-03-03 19:50:37,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.741095162147794) internal successors, (7037), 1881 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 7037 transitions. [2022-03-03 19:50:37,686 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 7037 transitions. Word has length 29 [2022-03-03 19:50:37,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:37,686 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 7037 transitions. [2022-03-03 19:50:37,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 7037 transitions. [2022-03-03 19:50:37,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:50:37,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:37,691 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, 1, 1] [2022-03-03 19:50:37,714 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 19:50:37,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:37,912 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:37,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:37,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1162136574, now seen corresponding path program 6 times [2022-03-03 19:50:37,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:37,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859780462] [2022-03-03 19:50:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:37,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:37,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:37,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859780462] [2022-03-03 19:50:37,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859780462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:37,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583970780] [2022-03-03 19:50:37,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:50:37,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:37,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:37,983 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 19:50:37,998 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 19:50:38,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:50:38,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:38,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:50:38,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:38,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-03 19:50:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:38,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:38,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:38,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-03-03 19:50:38,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:38,321 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 9 treesize of output 14 [2022-03-03 19:50:38,336 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 9 treesize of output 3 [2022-03-03 19:50:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:38,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583970780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:38,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:38,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-03 19:50:38,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411310223] [2022-03-03 19:50:38,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:38,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 19:50:38,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:38,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 19:50:38,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:50:38,386 INFO L87 Difference]: Start difference. First operand 1882 states and 7037 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:38,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:38,508 INFO L93 Difference]: Finished difference Result 2635 states and 9856 transitions. [2022-03-03 19:50:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:50:38,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:50:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:38,517 INFO L225 Difference]: With dead ends: 2635 [2022-03-03 19:50:38,517 INFO L226 Difference]: Without dead ends: 2556 [2022-03-03 19:50:38,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:50:38,518 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 53 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:38,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 184 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-03-03 19:50:38,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1926. [2022-03-03 19:50:38,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.7314285714285713) internal successors, (7183), 1925 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7183 transitions. [2022-03-03 19:50:38,564 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7183 transitions. Word has length 29 [2022-03-03 19:50:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:38,564 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 7183 transitions. [2022-03-03 19:50:38,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7183 transitions. [2022-03-03 19:50:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 19:50:38,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:38,569 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2022-03-03 19:50:38,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-03 19:50:38,782 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,SelfDestructingSolverStorable14 [2022-03-03 19:50:38,782 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:38,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:38,782 INFO L85 PathProgramCache]: Analyzing trace with hash 719206604, now seen corresponding path program 7 times [2022-03-03 19:50:38,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:38,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359370912] [2022-03-03 19:50:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:38,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:38,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:38,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359370912] [2022-03-03 19:50:38,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359370912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:38,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896733537] [2022-03-03 19:50:38,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:50:38,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:38,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:38,819 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 19:50:38,820 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 19:50:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:38,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:50:38,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:38,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:38,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896733537] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:38,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:38,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-03-03 19:50:38,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768670205] [2022-03-03 19:50:38,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:38,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:50:38,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:38,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:50:38,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:50:38,995 INFO L87 Difference]: Start difference. First operand 1926 states and 7183 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 19:50:39,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:39,112 INFO L93 Difference]: Finished difference Result 3472 states and 12599 transitions. [2022-03-03 19:50:39,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:50:39,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 31 [2022-03-03 19:50:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:39,124 INFO L225 Difference]: With dead ends: 3472 [2022-03-03 19:50:39,124 INFO L226 Difference]: Without dead ends: 3318 [2022-03-03 19:50:39,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:50:39,125 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 113 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:39,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 74 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:50:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2022-03-03 19:50:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2796. [2022-03-03 19:50:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 3.759212880143113) internal successors, (10507), 2795 states have internal predecessors, (10507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:39,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 10507 transitions. [2022-03-03 19:50:39,201 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 10507 transitions. Word has length 31 [2022-03-03 19:50:39,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:39,201 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 10507 transitions. [2022-03-03 19:50:39,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 19:50:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 10507 transitions. [2022-03-03 19:50:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 19:50:39,208 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:39,208 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2022-03-03 19:50:39,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-03 19:50:39,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-03 19:50:39,431 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:39,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:39,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1293130992, now seen corresponding path program 8 times [2022-03-03 19:50:39,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:39,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435972307] [2022-03-03 19:50:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:39,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:50:39,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:39,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435972307] [2022-03-03 19:50:39,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435972307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:50:39,471 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:50:39,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:50:39,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405267479] [2022-03-03 19:50:39,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:50:39,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:50:39,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:39,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:50:39,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:50:39,472 INFO L87 Difference]: Start difference. First operand 2796 states and 10507 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:39,539 INFO L93 Difference]: Finished difference Result 5761 states and 21881 transitions. [2022-03-03 19:50:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:50:39,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 19:50:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:39,555 INFO L225 Difference]: With dead ends: 5761 [2022-03-03 19:50:39,555 INFO L226 Difference]: Without dead ends: 5510 [2022-03-03 19:50:39,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:50:39,556 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:39,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 52 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:50:39,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2022-03-03 19:50:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 4894. [2022-03-03 19:50:39,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4894 states, 4893 states have (on average 3.8779889638258735) internal successors, (18975), 4893 states have internal predecessors, (18975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 18975 transitions. [2022-03-03 19:50:39,679 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 18975 transitions. Word has length 31 [2022-03-03 19:50:39,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:39,679 INFO L470 AbstractCegarLoop]: Abstraction has 4894 states and 18975 transitions. [2022-03-03 19:50:39,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 18975 transitions. [2022-03-03 19:50:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:50:39,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:39,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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 19:50:39,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-03 19:50:39,692 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:39,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1002043648, now seen corresponding path program 9 times [2022-03-03 19:50:39,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:39,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869859781] [2022-03-03 19:50:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:39,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-03 19:50:39,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:39,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869859781] [2022-03-03 19:50:39,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869859781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:39,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021546011] [2022-03-03 19:50:39,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:50:39,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:39,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:39,727 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 19:50:39,760 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 19:50:39,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:50:39,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:39,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:50:39,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-03 19:50:39,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-03 19:50:39,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021546011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:39,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:39,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:50:39,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908937082] [2022-03-03 19:50:39,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:39,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:50:39,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:39,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:50:39,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:50:39,971 INFO L87 Difference]: Start difference. First operand 4894 states and 18975 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:40,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:40,411 INFO L93 Difference]: Finished difference Result 17927 states and 66398 transitions. [2022-03-03 19:50:40,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:50:40,411 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:50:40,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:40,450 INFO L225 Difference]: With dead ends: 17927 [2022-03-03 19:50:40,450 INFO L226 Difference]: Without dead ends: 15301 [2022-03-03 19:50:40,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:50:40,451 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:40,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 160 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:50:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2022-03-03 19:50:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 8354. [2022-03-03 19:50:40,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 8353 states have (on average 3.950676403687298) internal successors, (33000), 8353 states have internal predecessors, (33000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:40,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 33000 transitions. [2022-03-03 19:50:40,748 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 33000 transitions. Word has length 34 [2022-03-03 19:50:40,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:40,748 INFO L470 AbstractCegarLoop]: Abstraction has 8354 states and 33000 transitions. [2022-03-03 19:50:40,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:40,748 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 33000 transitions. [2022-03-03 19:50:40,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:50:40,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:40,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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 19:50:40,792 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 19:50:40,985 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,SelfDestructingSolverStorable17 [2022-03-03 19:50:40,985 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:40,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash -129967119, now seen corresponding path program 10 times [2022-03-03 19:50:40,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:40,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098054166] [2022-03-03 19:50:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:40,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:50:41,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:41,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098054166] [2022-03-03 19:50:41,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098054166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:41,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163215185] [2022-03-03 19:50:41,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:50:41,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:41,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:41,088 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 19:50:41,120 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 19:50:41,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:50:41,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:41,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:50:41,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:50:41,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:50:41,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163215185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:41,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:41,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:50:41,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954862056] [2022-03-03 19:50:41,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:41,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:50:41,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:41,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:50:41,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:50:41,299 INFO L87 Difference]: Start difference. First operand 8354 states and 33000 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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 19:50:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:41,766 INFO L93 Difference]: Finished difference Result 21371 states and 81454 transitions. [2022-03-03 19:50:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:50:41,766 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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 34 [2022-03-03 19:50:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:41,827 INFO L225 Difference]: With dead ends: 21371 [2022-03-03 19:50:41,827 INFO L226 Difference]: Without dead ends: 20932 [2022-03-03 19:50:41,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:50:41,828 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 350 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:41,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 83 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:50:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20932 states. [2022-03-03 19:50:42,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20932 to 12631. [2022-03-03 19:50:42,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12631 states, 12630 states have (on average 4.037925574030087) internal successors, (50999), 12630 states have internal predecessors, (50999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 50999 transitions. [2022-03-03 19:50:42,360 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 50999 transitions. Word has length 34 [2022-03-03 19:50:42,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:42,360 INFO L470 AbstractCegarLoop]: Abstraction has 12631 states and 50999 transitions. [2022-03-03 19:50:42,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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 19:50:42,361 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 50999 transitions. [2022-03-03 19:50:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:50:42,395 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:42,395 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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 19:50:42,419 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 19:50:42,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:42,615 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1761367056, now seen corresponding path program 11 times [2022-03-03 19:50:42,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:42,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827639303] [2022-03-03 19:50:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:42,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:42,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:42,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827639303] [2022-03-03 19:50:42,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827639303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:42,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441591436] [2022-03-03 19:50:42,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:50:42,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:42,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:42,657 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 19:50:42,687 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 19:50:42,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:50:42,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:42,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:50:42,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:42,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:42,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441591436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:42,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:42,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-03 19:50:42,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520858634] [2022-03-03 19:50:42,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:42,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:50:42,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:42,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:50:42,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:50:42,891 INFO L87 Difference]: Start difference. First operand 12631 states and 50999 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 19:50:43,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:43,309 INFO L93 Difference]: Finished difference Result 20596 states and 79596 transitions. [2022-03-03 19:50:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:50:43,309 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 34 [2022-03-03 19:50:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:43,361 INFO L225 Difference]: With dead ends: 20596 [2022-03-03 19:50:43,361 INFO L226 Difference]: Without dead ends: 20518 [2022-03-03 19:50:43,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:50:43,362 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 183 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:43,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 61 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:50:43,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20518 states. [2022-03-03 19:50:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 12577. [2022-03-03 19:50:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12577 states, 12576 states have (on average 4.042064249363868) internal successors, (50833), 12576 states have internal predecessors, (50833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12577 states to 12577 states and 50833 transitions. [2022-03-03 19:50:43,872 INFO L78 Accepts]: Start accepts. Automaton has 12577 states and 50833 transitions. Word has length 34 [2022-03-03 19:50:43,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:43,872 INFO L470 AbstractCegarLoop]: Abstraction has 12577 states and 50833 transitions. [2022-03-03 19:50:43,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 19:50:43,872 INFO L276 IsEmpty]: Start isEmpty. Operand 12577 states and 50833 transitions. [2022-03-03 19:50:43,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:50:43,901 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:43,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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 19:50:43,917 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 19:50:44,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:44,102 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:44,103 INFO L85 PathProgramCache]: Analyzing trace with hash -447820591, now seen corresponding path program 12 times [2022-03-03 19:50:44,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:44,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070290018] [2022-03-03 19:50:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:44,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:44,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:44,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070290018] [2022-03-03 19:50:44,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070290018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:44,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790403034] [2022-03-03 19:50:44,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:50:44,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:44,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:44,134 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 19:50:44,166 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 19:50:44,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:50:44,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:44,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:50:44,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:44,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:44,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790403034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:44,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:44,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-03 19:50:44,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438732172] [2022-03-03 19:50:44,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:44,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:50:44,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:44,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:50:44,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:50:44,368 INFO L87 Difference]: Start difference. First operand 12577 states and 50833 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:44,885 INFO L93 Difference]: Finished difference Result 22733 states and 87606 transitions. [2022-03-03 19:50:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:50:44,886 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:50:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:45,035 INFO L225 Difference]: With dead ends: 22733 [2022-03-03 19:50:45,035 INFO L226 Difference]: Without dead ends: 21028 [2022-03-03 19:50:45,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:50:45,036 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 210 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:45,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 99 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:50:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2022-03-03 19:50:45,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 15386. [2022-03-03 19:50:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15386 states, 15385 states have (on average 4.0534936626584335) internal successors, (62363), 15385 states have internal predecessors, (62363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 62363 transitions. [2022-03-03 19:50:45,450 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 62363 transitions. Word has length 34 [2022-03-03 19:50:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:45,450 INFO L470 AbstractCegarLoop]: Abstraction has 15386 states and 62363 transitions. [2022-03-03 19:50:45,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:45,450 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 62363 transitions. [2022-03-03 19:50:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:50:45,479 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:45,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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 19:50:45,520 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 19:50:45,681 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,SelfDestructingSolverStorable20 [2022-03-03 19:50:45,681 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1932805376, now seen corresponding path program 13 times [2022-03-03 19:50:45,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:45,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317581526] [2022-03-03 19:50:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:45,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:45,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:45,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317581526] [2022-03-03 19:50:45,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317581526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:45,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746032240] [2022-03-03 19:50:45,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:50:45,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:45,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:45,712 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 19:50:45,740 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 19:50:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:45,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:50:45,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:45,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:45,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746032240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:45,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:45,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:50:45,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59226960] [2022-03-03 19:50:45,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:45,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:50:45,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:45,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:50:45,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:50:45,905 INFO L87 Difference]: Start difference. First operand 15386 states and 62363 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:46,756 INFO L93 Difference]: Finished difference Result 31402 states and 124083 transitions. [2022-03-03 19:50:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:50:46,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:50:46,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:46,868 INFO L225 Difference]: With dead ends: 31402 [2022-03-03 19:50:46,868 INFO L226 Difference]: Without dead ends: 31094 [2022-03-03 19:50:46,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:50:46,869 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 321 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:46,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 77 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:50:46,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31094 states. [2022-03-03 19:50:47,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31094 to 19812. [2022-03-03 19:50:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19812 states, 19811 states have (on average 4.119024784210792) internal successors, (81602), 19811 states have internal predecessors, (81602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19812 states to 19812 states and 81602 transitions. [2022-03-03 19:50:47,482 INFO L78 Accepts]: Start accepts. Automaton has 19812 states and 81602 transitions. Word has length 34 [2022-03-03 19:50:47,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:47,482 INFO L470 AbstractCegarLoop]: Abstraction has 19812 states and 81602 transitions. [2022-03-03 19:50:47,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:47,482 INFO L276 IsEmpty]: Start isEmpty. Operand 19812 states and 81602 transitions. [2022-03-03 19:50:47,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:50:47,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:47,677 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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 19:50:47,700 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 19:50:47,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:47,877 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:47,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:47,878 INFO L85 PathProgramCache]: Analyzing trace with hash 19813248, now seen corresponding path program 14 times [2022-03-03 19:50:47,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:47,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563295932] [2022-03-03 19:50:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:47,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:50:47,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:47,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563295932] [2022-03-03 19:50:47,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563295932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:47,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671709717] [2022-03-03 19:50:47,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:50:47,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:47,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:47,923 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 19:50:47,925 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 19:50:47,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:50:47,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:47,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:50:47,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:48,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:50:48,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671709717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:48,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:48,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-03 19:50:48,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226462022] [2022-03-03 19:50:48,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:48,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:50:48,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:48,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:50:48,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:50:48,170 INFO L87 Difference]: Start difference. First operand 19812 states and 81602 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 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 19:50:48,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:48,762 INFO L93 Difference]: Finished difference Result 33709 states and 133959 transitions. [2022-03-03 19:50:48,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:50:48,763 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 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 34 [2022-03-03 19:50:48,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:48,873 INFO L225 Difference]: With dead ends: 33709 [2022-03-03 19:50:48,873 INFO L226 Difference]: Without dead ends: 32656 [2022-03-03 19:50:48,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:50:48,874 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 175 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:48,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 102 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:50:48,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32656 states. [2022-03-03 19:50:49,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32656 to 23355. [2022-03-03 19:50:49,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23355 states, 23354 states have (on average 4.114370129314036) internal successors, (96087), 23354 states have internal predecessors, (96087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23355 states to 23355 states and 96087 transitions. [2022-03-03 19:50:49,578 INFO L78 Accepts]: Start accepts. Automaton has 23355 states and 96087 transitions. Word has length 34 [2022-03-03 19:50:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:49,578 INFO L470 AbstractCegarLoop]: Abstraction has 23355 states and 96087 transitions. [2022-03-03 19:50:49,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 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 19:50:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 23355 states and 96087 transitions. [2022-03-03 19:50:49,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:50:49,633 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:49,633 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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 19:50:49,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-03 19:50:49,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:49,847 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash -650007193, now seen corresponding path program 15 times [2022-03-03 19:50:49,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:49,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484641213] [2022-03-03 19:50:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:49,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:50:49,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:49,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484641213] [2022-03-03 19:50:49,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484641213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:49,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021854719] [2022-03-03 19:50:49,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:50:49,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:49,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:49,884 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 19:50:49,885 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 19:50:49,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:50:49,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:49,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:50:49,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:50,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:50:50,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021854719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:50,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:50,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-03 19:50:50,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079351125] [2022-03-03 19:50:50,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:50,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:50:50,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:50,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:50:50,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:50:50,079 INFO L87 Difference]: Start difference. First operand 23355 states and 96087 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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 19:50:50,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:50,674 INFO L93 Difference]: Finished difference Result 31214 states and 125510 transitions. [2022-03-03 19:50:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:50:50,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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 34 [2022-03-03 19:50:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:50,788 INFO L225 Difference]: With dead ends: 31214 [2022-03-03 19:50:50,788 INFO L226 Difference]: Without dead ends: 31106 [2022-03-03 19:50:50,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:50:50,789 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 164 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:50,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 73 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:50:50,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31106 states. [2022-03-03 19:50:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31106 to 24543. [2022-03-03 19:50:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24543 states, 24542 states have (on average 4.135033819574606) internal successors, (101482), 24542 states have internal predecessors, (101482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24543 states to 24543 states and 101482 transitions. [2022-03-03 19:50:51,569 INFO L78 Accepts]: Start accepts. Automaton has 24543 states and 101482 transitions. Word has length 34 [2022-03-03 19:50:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:51,569 INFO L470 AbstractCegarLoop]: Abstraction has 24543 states and 101482 transitions. [2022-03-03 19:50:51,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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 19:50:51,569 INFO L276 IsEmpty]: Start isEmpty. Operand 24543 states and 101482 transitions. [2022-03-03 19:50:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:50:51,788 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:51,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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 19:50:51,805 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 19:50:51,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-03 19:50:51,991 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:51,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:51,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2144646697, now seen corresponding path program 16 times [2022-03-03 19:50:51,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:51,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163343001] [2022-03-03 19:50:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:51,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-03 19:50:52,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:52,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163343001] [2022-03-03 19:50:52,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163343001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:52,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678652807] [2022-03-03 19:50:52,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:50:52,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:52,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:52,029 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 19:50:52,030 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 19:50:52,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:50:52,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:52,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:50:52,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-03 19:50:52,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 19:50:52,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678652807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:50:52,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 19:50:52,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-03-03 19:50:52,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952126907] [2022-03-03 19:50:52,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:50:52,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:50:52,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:52,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:50:52,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:50:52,117 INFO L87 Difference]: Start difference. First operand 24543 states and 101482 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:52,291 INFO L93 Difference]: Finished difference Result 29524 states and 121533 transitions. [2022-03-03 19:50:52,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:50:52,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:50:52,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:52,587 INFO L225 Difference]: With dead ends: 29524 [2022-03-03 19:50:52,587 INFO L226 Difference]: Without dead ends: 29524 [2022-03-03 19:50:52,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 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 19:50:52,591 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:52,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:50:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29524 states. [2022-03-03 19:50:53,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29524 to 22120. [2022-03-03 19:50:53,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22120 states, 22119 states have (on average 4.096252090962521) internal successors, (90605), 22119 states have internal predecessors, (90605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22120 states to 22120 states and 90605 transitions. [2022-03-03 19:50:53,195 INFO L78 Accepts]: Start accepts. Automaton has 22120 states and 90605 transitions. Word has length 37 [2022-03-03 19:50:53,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:53,195 INFO L470 AbstractCegarLoop]: Abstraction has 22120 states and 90605 transitions. [2022-03-03 19:50:53,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:53,196 INFO L276 IsEmpty]: Start isEmpty. Operand 22120 states and 90605 transitions. [2022-03-03 19:50:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:50:53,237 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:53,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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 19:50:53,253 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 19:50:53,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:53,437 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:53,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:53,438 INFO L85 PathProgramCache]: Analyzing trace with hash -461619199, now seen corresponding path program 17 times [2022-03-03 19:50:53,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:53,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741408735] [2022-03-03 19:50:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:53,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-03 19:50:53,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:53,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741408735] [2022-03-03 19:50:53,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741408735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:53,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078929689] [2022-03-03 19:50:53,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:50:53,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:53,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:53,476 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 19:50:53,477 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 19:50:53,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:50:53,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:53,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:50:53,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-03 19:50:53,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 19:50:53,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078929689] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:50:53,570 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 19:50:53,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-03-03 19:50:53,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594907958] [2022-03-03 19:50:53,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:50:53,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:50:53,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:53,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:50:53,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:50:53,571 INFO L87 Difference]: Start difference. First operand 22120 states and 90605 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:53,958 INFO L93 Difference]: Finished difference Result 30000 states and 123549 transitions. [2022-03-03 19:50:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:50:53,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:50:53,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:54,051 INFO L225 Difference]: With dead ends: 30000 [2022-03-03 19:50:54,051 INFO L226 Difference]: Without dead ends: 30000 [2022-03-03 19:50:54,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:50:54,052 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:54,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 57 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:50:54,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30000 states. [2022-03-03 19:50:54,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30000 to 24376. [2022-03-03 19:50:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24376 states, 24375 states have (on average 4.091979487179487) internal successors, (99742), 24375 states have internal predecessors, (99742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24376 states to 24376 states and 99742 transitions. [2022-03-03 19:50:54,851 INFO L78 Accepts]: Start accepts. Automaton has 24376 states and 99742 transitions. Word has length 37 [2022-03-03 19:50:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:54,852 INFO L470 AbstractCegarLoop]: Abstraction has 24376 states and 99742 transitions. [2022-03-03 19:50:54,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 24376 states and 99742 transitions. [2022-03-03 19:50:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:50:54,903 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:54,903 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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 19:50:54,919 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 19:50:55,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:55,104 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:55,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:55,105 INFO L85 PathProgramCache]: Analyzing trace with hash -857424067, now seen corresponding path program 18 times [2022-03-03 19:50:55,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:55,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180069290] [2022-03-03 19:50:55,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:55,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-03 19:50:55,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:55,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180069290] [2022-03-03 19:50:55,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180069290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:55,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871075764] [2022-03-03 19:50:55,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:50:55,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:55,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:55,132 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 19:50:55,133 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 19:50:55,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:50:55,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:55,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:50:55,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-03 19:50:55,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-03 19:50:55,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871075764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:55,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:55,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-03-03 19:50:55,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621651490] [2022-03-03 19:50:55,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:55,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:50:55,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:55,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:50:55,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:50:55,278 INFO L87 Difference]: Start difference. First operand 24376 states and 99742 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:55,552 INFO L93 Difference]: Finished difference Result 37294 states and 154370 transitions. [2022-03-03 19:50:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:50:55,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:50:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:55,912 INFO L225 Difference]: With dead ends: 37294 [2022-03-03 19:50:55,912 INFO L226 Difference]: Without dead ends: 37294 [2022-03-03 19:50:55,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:50:55,913 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 91 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:55,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 81 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:50:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37294 states. [2022-03-03 19:50:56,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37294 to 34517. [2022-03-03 19:50:56,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34517 states, 34516 states have (on average 4.136226677482907) internal successors, (142766), 34516 states have internal predecessors, (142766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34517 states to 34517 states and 142766 transitions. [2022-03-03 19:50:56,897 INFO L78 Accepts]: Start accepts. Automaton has 34517 states and 142766 transitions. Word has length 37 [2022-03-03 19:50:56,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:56,897 INFO L470 AbstractCegarLoop]: Abstraction has 34517 states and 142766 transitions. [2022-03-03 19:50:56,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:56,897 INFO L276 IsEmpty]: Start isEmpty. Operand 34517 states and 142766 transitions. [2022-03-03 19:50:57,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:50:57,024 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:57,024 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:57,039 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 19:50:57,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:57,224 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:50:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:57,225 INFO L85 PathProgramCache]: Analyzing trace with hash -709164033, now seen corresponding path program 19 times [2022-03-03 19:50:57,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:57,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169562266] [2022-03-03 19:50:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:57,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:57,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:57,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169562266] [2022-03-03 19:50:57,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169562266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:57,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278972309] [2022-03-03 19:50:57,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:50:57,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:57,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:57,492 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 19:50:57,492 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 19:50:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:57,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:50:57,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:57,751 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:50:57,751 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 35 treesize of output 17 [2022-03-03 19:50:57,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:57,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:57,949 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 37 treesize of output 17 [2022-03-03 19:50:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:57,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:58,171 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:50:58,171 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 61 [2022-03-03 19:50:58,442 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:50:58,442 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 47 treesize of output 61 [2022-03-03 19:50:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:58,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278972309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:58,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:58,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-03 19:50:58,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376553680] [2022-03-03 19:50:58,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:58,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:50:58,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:58,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:50:58,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:50:58,579 INFO L87 Difference]: Start difference. First operand 34517 states and 142766 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 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 19:50:59,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:59,739 INFO L93 Difference]: Finished difference Result 57979 states and 239704 transitions. [2022-03-03 19:50:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:50:59,740 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 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 39 [2022-03-03 19:50:59,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:00,188 INFO L225 Difference]: With dead ends: 57979 [2022-03-03 19:51:00,188 INFO L226 Difference]: Without dead ends: 57787 [2022-03-03 19:51:00,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:51:00,195 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 186 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:00,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 911 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 963 Invalid, 0 Unknown, 126 Unchecked, 0.6s Time] [2022-03-03 19:51:00,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57787 states. [2022-03-03 19:51:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57787 to 35063. [2022-03-03 19:51:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35063 states, 35062 states have (on average 4.133534881067822) internal successors, (144930), 35062 states have internal predecessors, (144930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35063 states to 35063 states and 144930 transitions. [2022-03-03 19:51:01,499 INFO L78 Accepts]: Start accepts. Automaton has 35063 states and 144930 transitions. Word has length 39 [2022-03-03 19:51:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:01,499 INFO L470 AbstractCegarLoop]: Abstraction has 35063 states and 144930 transitions. [2022-03-03 19:51:01,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 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 19:51:01,500 INFO L276 IsEmpty]: Start isEmpty. Operand 35063 states and 144930 transitions. [2022-03-03 19:51:01,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:51:01,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:01,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:01,602 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 19:51:01,786 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,SelfDestructingSolverStorable27 [2022-03-03 19:51:01,787 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:01,787 INFO L85 PathProgramCache]: Analyzing trace with hash 868774019, now seen corresponding path program 20 times [2022-03-03 19:51:01,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:01,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520846072] [2022-03-03 19:51:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:01,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:01,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:01,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520846072] [2022-03-03 19:51:01,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520846072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:01,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440725128] [2022-03-03 19:51:01,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:51:01,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:01,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:01,977 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 19:51:01,978 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 19:51:02,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:51:02,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:02,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:51:02,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:02,242 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:51:02,242 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 35 treesize of output 17 [2022-03-03 19:51:02,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:02,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:02,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-03-03 19:51:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:02,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:02,650 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:02,651 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 61 [2022-03-03 19:51:02,913 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:02,913 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 47 treesize of output 61 [2022-03-03 19:51:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:03,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440725128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:03,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:03,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 19:51:03,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351063456] [2022-03-03 19:51:03,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:03,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:51:03,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:03,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:51:03,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:51:03,048 INFO L87 Difference]: Start difference. First operand 35063 states and 144930 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 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 19:51:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:03,917 INFO L93 Difference]: Finished difference Result 51473 states and 213928 transitions. [2022-03-03 19:51:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:51:03,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 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 39 [2022-03-03 19:51:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:04,149 INFO L225 Difference]: With dead ends: 51473 [2022-03-03 19:51:04,150 INFO L226 Difference]: Without dead ends: 51418 [2022-03-03 19:51:04,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:51:04,150 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 152 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:04,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 738 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 611 Invalid, 0 Unknown, 257 Unchecked, 0.5s Time] [2022-03-03 19:51:04,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51418 states. [2022-03-03 19:51:05,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51418 to 35819. [2022-03-03 19:51:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35819 states, 35818 states have (on average 4.1391479144564185) internal successors, (148256), 35818 states have internal predecessors, (148256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35819 states to 35819 states and 148256 transitions. [2022-03-03 19:51:05,491 INFO L78 Accepts]: Start accepts. Automaton has 35819 states and 148256 transitions. Word has length 39 [2022-03-03 19:51:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:05,491 INFO L470 AbstractCegarLoop]: Abstraction has 35819 states and 148256 transitions. [2022-03-03 19:51:05,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 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 19:51:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 35819 states and 148256 transitions. [2022-03-03 19:51:05,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:51:05,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:05,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:05,619 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 19:51:05,811 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,SelfDestructingSolverStorable28 [2022-03-03 19:51:05,811 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:05,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash -564546565, now seen corresponding path program 21 times [2022-03-03 19:51:05,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:05,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688406100] [2022-03-03 19:51:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:05,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:05,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:05,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688406100] [2022-03-03 19:51:05,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688406100] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:05,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940612282] [2022-03-03 19:51:05,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:51:05,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:05,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:05,994 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 19:51:05,995 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 19:51:06,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:51:06,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:06,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:51:06,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:06,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:06,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:06,319 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 35 [2022-03-03 19:51:06,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:06,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:06,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:06,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-03 19:51:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:06,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:06,860 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:06,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:51:07,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:07,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:07,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:07,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:07,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-03-03 19:51:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:07,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940612282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:07,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:07,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 21 [2022-03-03 19:51:07,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448245998] [2022-03-03 19:51:07,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:07,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:51:07,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:07,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:51:07,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:51:07,512 INFO L87 Difference]: Start difference. First operand 35819 states and 148256 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:08,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:08,527 INFO L93 Difference]: Finished difference Result 48198 states and 199508 transitions. [2022-03-03 19:51:08,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:51:08,527 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:51:08,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:08,684 INFO L225 Difference]: With dead ends: 48198 [2022-03-03 19:51:08,684 INFO L226 Difference]: Without dead ends: 48195 [2022-03-03 19:51:08,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:51:08,685 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 249 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:08,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 730 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 469 Invalid, 0 Unknown, 472 Unchecked, 0.2s Time] [2022-03-03 19:51:08,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48195 states. [2022-03-03 19:51:09,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48195 to 36489. [2022-03-03 19:51:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36489 states, 36488 states have (on average 4.132317474238105) internal successors, (150780), 36488 states have internal predecessors, (150780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36489 states to 36489 states and 150780 transitions. [2022-03-03 19:51:09,809 INFO L78 Accepts]: Start accepts. Automaton has 36489 states and 150780 transitions. Word has length 39 [2022-03-03 19:51:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:09,809 INFO L470 AbstractCegarLoop]: Abstraction has 36489 states and 150780 transitions. [2022-03-03 19:51:09,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 36489 states and 150780 transitions. [2022-03-03 19:51:09,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:51:09,886 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:09,886 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:09,901 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 19:51:10,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:10,086 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:10,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash -898797257, now seen corresponding path program 22 times [2022-03-03 19:51:10,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:10,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042344262] [2022-03-03 19:51:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:10,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:10,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:10,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042344262] [2022-03-03 19:51:10,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042344262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:10,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45639153] [2022-03-03 19:51:10,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:51:10,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:10,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:10,263 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 19:51:10,264 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 19:51:10,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:51:10,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:10,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:51:10,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:10,750 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:51:10,750 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 35 treesize of output 17 [2022-03-03 19:51:11,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:11,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:11,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-03-03 19:51:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:11,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:11,217 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:11,218 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 61 [2022-03-03 19:51:11,448 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:11,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-03-03 19:51:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:11,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45639153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:11,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:11,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 19:51:11,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102435874] [2022-03-03 19:51:11,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:11,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:51:11,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:11,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:51:11,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:51:11,558 INFO L87 Difference]: Start difference. First operand 36489 states and 150780 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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 19:51:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:12,338 INFO L93 Difference]: Finished difference Result 55125 states and 228658 transitions. [2022-03-03 19:51:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:51:12,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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 39 [2022-03-03 19:51:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:12,560 INFO L225 Difference]: With dead ends: 55125 [2022-03-03 19:51:12,560 INFO L226 Difference]: Without dead ends: 55122 [2022-03-03 19:51:12,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:51:12,561 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 169 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:12,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 664 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 545 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-03-03 19:51:12,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55122 states. [2022-03-03 19:51:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55122 to 36526. [2022-03-03 19:51:13,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36526 states, 36525 states have (on average 4.131170431211499) internal successors, (150891), 36525 states have internal predecessors, (150891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:13,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36526 states to 36526 states and 150891 transitions. [2022-03-03 19:51:13,751 INFO L78 Accepts]: Start accepts. Automaton has 36526 states and 150891 transitions. Word has length 39 [2022-03-03 19:51:13,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:13,751 INFO L470 AbstractCegarLoop]: Abstraction has 36526 states and 150891 transitions. [2022-03-03 19:51:13,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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 19:51:13,751 INFO L276 IsEmpty]: Start isEmpty. Operand 36526 states and 150891 transitions. [2022-03-03 19:51:13,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:51:13,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:13,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:13,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-03 19:51:14,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:14,027 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:14,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:14,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1852048495, now seen corresponding path program 23 times [2022-03-03 19:51:14,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:14,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397060432] [2022-03-03 19:51:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:14,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:14,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:14,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397060432] [2022-03-03 19:51:14,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397060432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:14,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627251467] [2022-03-03 19:51:14,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:51:14,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:14,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:14,194 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 19:51:14,195 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 19:51:14,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:51:14,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:14,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:51:14,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:14,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:14,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:14,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:14,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:14,398 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 44 [2022-03-03 19:51:14,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:14,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:14,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:14,930 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 17 [2022-03-03 19:51:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:14,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:15,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:15,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:15,391 INFO L353 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-03-03 19:51:15,391 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 37 treesize of output 49 [2022-03-03 19:51:16,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:16,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:16,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:16,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:16,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 20 [2022-03-03 19:51:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:16,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627251467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:16,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:16,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-03-03 19:51:16,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180881351] [2022-03-03 19:51:16,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:16,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:51:16,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:16,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:51:16,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:51:16,124 INFO L87 Difference]: Start difference. First operand 36526 states and 150891 transitions. Second operand has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:17,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:17,820 INFO L93 Difference]: Finished difference Result 51278 states and 207096 transitions. [2022-03-03 19:51:17,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 19:51:17,820 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:51:17,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:17,999 INFO L225 Difference]: With dead ends: 51278 [2022-03-03 19:51:17,999 INFO L226 Difference]: Without dead ends: 51275 [2022-03-03 19:51:18,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=417, Invalid=2339, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 19:51:18,000 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 469 mSDsluCounter, 2524 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1880 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1064 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:18,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 1880 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 794 Invalid, 0 Unknown, 1064 Unchecked, 0.4s Time] [2022-03-03 19:51:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51275 states. [2022-03-03 19:51:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51275 to 37103. [2022-03-03 19:51:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37103 states, 37102 states have (on average 4.124656352757264) internal successors, (153033), 37102 states have internal predecessors, (153033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37103 states to 37103 states and 153033 transitions. [2022-03-03 19:51:19,120 INFO L78 Accepts]: Start accepts. Automaton has 37103 states and 153033 transitions. Word has length 39 [2022-03-03 19:51:19,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:19,120 INFO L470 AbstractCegarLoop]: Abstraction has 37103 states and 153033 transitions. [2022-03-03 19:51:19,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 37103 states and 153033 transitions. [2022-03-03 19:51:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:51:19,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:19,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:19,212 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 19:51:19,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:19,398 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash -2088011479, now seen corresponding path program 24 times [2022-03-03 19:51:19,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:19,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798556639] [2022-03-03 19:51:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:19,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:19,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:19,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798556639] [2022-03-03 19:51:19,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798556639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:19,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764984528] [2022-03-03 19:51:19,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:51:19,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:19,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:19,580 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 19:51:19,605 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 19:51:19,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:51:19,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:19,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-03 19:51:19,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:20,110 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:51:20,111 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 35 [2022-03-03 19:51:20,340 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:51:20,340 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 35 [2022-03-03 19:51:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:20,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:21,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:21,179 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:51:21,179 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 41 [2022-03-03 19:51:21,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:21,904 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:51:21,905 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 41 [2022-03-03 19:51:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:21,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764984528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:21,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:21,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-03-03 19:51:21,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863923469] [2022-03-03 19:51:21,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:21,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:51:21,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:21,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:51:21,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:51:21,943 INFO L87 Difference]: Start difference. First operand 37103 states and 153033 transitions. Second operand has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:23,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:23,036 INFO L93 Difference]: Finished difference Result 57932 states and 238518 transitions. [2022-03-03 19:51:23,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:51:23,036 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:51:23,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:23,240 INFO L225 Difference]: With dead ends: 57932 [2022-03-03 19:51:23,240 INFO L226 Difference]: Without dead ends: 57927 [2022-03-03 19:51:23,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:51:23,241 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 379 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 620 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:23,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 1174 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 641 Invalid, 0 Unknown, 620 Unchecked, 0.3s Time] [2022-03-03 19:51:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57927 states. [2022-03-03 19:51:24,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57927 to 37958. [2022-03-03 19:51:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37958 states, 37957 states have (on average 4.125694865242248) internal successors, (156599), 37957 states have internal predecessors, (156599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37958 states to 37958 states and 156599 transitions. [2022-03-03 19:51:24,724 INFO L78 Accepts]: Start accepts. Automaton has 37958 states and 156599 transitions. Word has length 39 [2022-03-03 19:51:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:24,724 INFO L470 AbstractCegarLoop]: Abstraction has 37958 states and 156599 transitions. [2022-03-03 19:51:24,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 37958 states and 156599 transitions. [2022-03-03 19:51:24,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:51:24,868 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:24,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:24,884 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 19:51:25,071 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,SelfDestructingSolverStorable32 [2022-03-03 19:51:25,071 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:25,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:25,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1038211985, now seen corresponding path program 25 times [2022-03-03 19:51:25,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:25,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316133247] [2022-03-03 19:51:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:25,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:25,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:25,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316133247] [2022-03-03 19:51:25,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316133247] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:25,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61977316] [2022-03-03 19:51:25,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:51:25,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:25,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:25,265 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 19:51:25,265 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 19:51:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:25,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:51:25,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:25,507 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:51:25,507 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 35 treesize of output 17 [2022-03-03 19:51:25,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:25,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:25,651 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 37 treesize of output 17 [2022-03-03 19:51:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:25,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:25,912 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:25,912 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 49 treesize of output 67 [2022-03-03 19:51:26,148 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:26,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-03-03 19:51:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:26,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61977316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:26,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:26,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:51:26,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829801026] [2022-03-03 19:51:26,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:26,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:51:26,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:26,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:51:26,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:51:26,251 INFO L87 Difference]: Start difference. First operand 37958 states and 156599 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 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 19:51:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:27,348 INFO L93 Difference]: Finished difference Result 63080 states and 260703 transitions. [2022-03-03 19:51:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:51:27,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 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 39 [2022-03-03 19:51:27,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:27,577 INFO L225 Difference]: With dead ends: 63080 [2022-03-03 19:51:27,577 INFO L226 Difference]: Without dead ends: 62888 [2022-03-03 19:51:27,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:51:27,578 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 244 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:27,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 809 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 776 Invalid, 0 Unknown, 203 Unchecked, 0.4s Time] [2022-03-03 19:51:27,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62888 states. [2022-03-03 19:51:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62888 to 38305. [2022-03-03 19:51:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38305 states, 38304 states have (on average 4.1239818295739346) internal successors, (157965), 38304 states have internal predecessors, (157965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38305 states to 38305 states and 157965 transitions. [2022-03-03 19:51:28,927 INFO L78 Accepts]: Start accepts. Automaton has 38305 states and 157965 transitions. Word has length 39 [2022-03-03 19:51:28,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:28,928 INFO L470 AbstractCegarLoop]: Abstraction has 38305 states and 157965 transitions. [2022-03-03 19:51:28,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 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 19:51:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 38305 states and 157965 transitions. [2022-03-03 19:51:29,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:51:29,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:29,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:29,303 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 19:51:29,502 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,SelfDestructingSolverStorable33 [2022-03-03 19:51:29,503 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:29,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:29,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1678817259, now seen corresponding path program 26 times [2022-03-03 19:51:29,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:29,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049483177] [2022-03-03 19:51:29,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:29,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:29,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:29,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049483177] [2022-03-03 19:51:29,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049483177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:29,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079853222] [2022-03-03 19:51:29,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:51:29,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:29,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:29,690 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 19:51:29,691 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 19:51:29,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:51:29,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:29,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:51:29,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:29,932 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:51:29,932 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 35 treesize of output 17 [2022-03-03 19:51:30,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:30,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:30,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:30,080 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 37 treesize of output 17 [2022-03-03 19:51:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:30,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:30,286 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:30,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 67 [2022-03-03 19:51:30,534 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:30,535 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 47 treesize of output 61 [2022-03-03 19:51:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:30,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079853222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:30,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:30,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 19:51:30,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811935576] [2022-03-03 19:51:30,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:30,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:51:30,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:30,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:51:30,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:51:30,656 INFO L87 Difference]: Start difference. First operand 38305 states and 157965 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 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 19:51:31,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:31,555 INFO L93 Difference]: Finished difference Result 56963 states and 236485 transitions. [2022-03-03 19:51:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:51:31,555 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 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 39 [2022-03-03 19:51:31,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:31,768 INFO L225 Difference]: With dead ends: 56963 [2022-03-03 19:51:31,768 INFO L226 Difference]: Without dead ends: 56908 [2022-03-03 19:51:31,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:51:31,769 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 180 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:31,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 829 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 788 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-03-03 19:51:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56908 states. [2022-03-03 19:51:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56908 to 39165. [2022-03-03 19:51:32,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39165 states, 39164 states have (on average 4.132264324379532) internal successors, (161836), 39164 states have internal predecessors, (161836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39165 states to 39165 states and 161836 transitions. [2022-03-03 19:51:33,002 INFO L78 Accepts]: Start accepts. Automaton has 39165 states and 161836 transitions. Word has length 39 [2022-03-03 19:51:33,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:33,002 INFO L470 AbstractCegarLoop]: Abstraction has 39165 states and 161836 transitions. [2022-03-03 19:51:33,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 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 19:51:33,002 INFO L276 IsEmpty]: Start isEmpty. Operand 39165 states and 161836 transitions. [2022-03-03 19:51:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:51:33,084 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:33,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:33,102 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 19:51:33,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-03 19:51:33,293 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:33,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1182829453, now seen corresponding path program 27 times [2022-03-03 19:51:33,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:33,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099340671] [2022-03-03 19:51:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:33,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:33,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:33,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099340671] [2022-03-03 19:51:33,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099340671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:33,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185347619] [2022-03-03 19:51:33,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:51:33,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:33,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:33,450 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 19:51:33,450 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 19:51:33,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:51:33,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:33,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:51:33,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:33,683 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:51:33,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 17 [2022-03-03 19:51:34,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:34,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:34,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:34,122 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 35 treesize of output 17 [2022-03-03 19:51:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:34,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:34,325 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:34,325 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 49 treesize of output 67 [2022-03-03 19:51:34,541 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:34,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-03-03 19:51:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:34,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185347619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:34,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:34,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 19:51:34,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465568921] [2022-03-03 19:51:34,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:34,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:51:34,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:34,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:51:34,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:51:34,621 INFO L87 Difference]: Start difference. First operand 39165 states and 161836 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 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 19:51:35,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:35,548 INFO L93 Difference]: Finished difference Result 59031 states and 245063 transitions. [2022-03-03 19:51:35,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:51:35,549 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 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 39 [2022-03-03 19:51:35,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:35,960 INFO L225 Difference]: With dead ends: 59031 [2022-03-03 19:51:35,960 INFO L226 Difference]: Without dead ends: 58976 [2022-03-03 19:51:35,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:51:35,961 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 212 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:35,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 631 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 677 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-03-03 19:51:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58976 states. [2022-03-03 19:51:37,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58976 to 39342. [2022-03-03 19:51:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39342 states, 39341 states have (on average 4.132457232912229) internal successors, (162575), 39341 states have internal predecessors, (162575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39342 states to 39342 states and 162575 transitions. [2022-03-03 19:51:37,269 INFO L78 Accepts]: Start accepts. Automaton has 39342 states and 162575 transitions. Word has length 39 [2022-03-03 19:51:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:37,269 INFO L470 AbstractCegarLoop]: Abstraction has 39342 states and 162575 transitions. [2022-03-03 19:51:37,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 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 19:51:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 39342 states and 162575 transitions. [2022-03-03 19:51:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:51:37,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:37,352 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:37,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:37,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:37,553 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:37,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:37,553 INFO L85 PathProgramCache]: Analyzing trace with hash 848578761, now seen corresponding path program 28 times [2022-03-03 19:51:37,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:37,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845437785] [2022-03-03 19:51:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:37,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:37,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:37,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845437785] [2022-03-03 19:51:37,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845437785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:37,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528074484] [2022-03-03 19:51:37,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:51:37,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:37,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:37,740 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 19:51:37,767 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 19:51:37,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:51:37,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:37,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:51:37,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:38,045 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:51:38,045 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 35 treesize of output 17 [2022-03-03 19:51:38,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:38,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:38,286 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 37 treesize of output 17 [2022-03-03 19:51:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:38,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:38,749 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:38,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 67 [2022-03-03 19:51:38,966 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:38,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-03-03 19:51:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:39,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528074484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:39,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:39,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 19:51:39,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895889826] [2022-03-03 19:51:39,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:39,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:51:39,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:51:39,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:51:39,060 INFO L87 Difference]: Start difference. First operand 39342 states and 162575 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 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 19:51:40,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:40,016 INFO L93 Difference]: Finished difference Result 63278 states and 263252 transitions. [2022-03-03 19:51:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:51:40,023 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 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 39 [2022-03-03 19:51:40,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:40,323 INFO L225 Difference]: With dead ends: 63278 [2022-03-03 19:51:40,323 INFO L226 Difference]: Without dead ends: 63223 [2022-03-03 19:51:40,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:51:40,324 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 219 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:40,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 769 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 810 Invalid, 0 Unknown, 316 Unchecked, 0.3s Time] [2022-03-03 19:51:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63223 states. [2022-03-03 19:51:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63223 to 38860. [2022-03-03 19:51:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38860 states, 38859 states have (on average 4.133868601868293) internal successors, (160638), 38859 states have internal predecessors, (160638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38860 states to 38860 states and 160638 transitions. [2022-03-03 19:51:41,748 INFO L78 Accepts]: Start accepts. Automaton has 38860 states and 160638 transitions. Word has length 39 [2022-03-03 19:51:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:41,749 INFO L470 AbstractCegarLoop]: Abstraction has 38860 states and 160638 transitions. [2022-03-03 19:51:41,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 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 19:51:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 38860 states and 160638 transitions. [2022-03-03 19:51:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:51:41,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:41,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:41,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:42,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-03 19:51:42,032 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:42,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:42,033 INFO L85 PathProgramCache]: Analyzing trace with hash 630820215, now seen corresponding path program 29 times [2022-03-03 19:51:42,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:42,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570105722] [2022-03-03 19:51:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:42,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:42,219 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:42,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570105722] [2022-03-03 19:51:42,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570105722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:42,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349378668] [2022-03-03 19:51:42,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:51:42,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:42,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:42,220 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 19:51:42,221 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 19:51:42,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:51:42,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:42,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:51:42,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:42,483 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:51:42,483 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 34 treesize of output 42 [2022-03-03 19:51:42,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:42,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:42,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:42,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:42,638 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 31 treesize of output 45 [2022-03-03 19:51:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:42,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:43,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:43,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:43,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:43,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:43,599 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 31 [2022-03-03 19:51:44,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:44,090 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:51:44,091 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 39 [2022-03-03 19:51:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:44,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349378668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:44,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:44,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-03-03 19:51:44,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544694577] [2022-03-03 19:51:44,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:44,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:51:44,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:44,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:51:44,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:51:44,125 INFO L87 Difference]: Start difference. First operand 38860 states and 160638 transitions. Second operand has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:46,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:46,507 INFO L93 Difference]: Finished difference Result 88850 states and 370487 transitions. [2022-03-03 19:51:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:51:46,508 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:51:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:47,094 INFO L225 Difference]: With dead ends: 88850 [2022-03-03 19:51:47,095 INFO L226 Difference]: Without dead ends: 88510 [2022-03-03 19:51:47,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=479, Invalid=3061, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 19:51:47,096 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 758 mSDsluCounter, 2474 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1795 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:47,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 1726 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1032 Invalid, 0 Unknown, 1795 Unchecked, 0.5s Time] [2022-03-03 19:51:47,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88510 states. [2022-03-03 19:51:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88510 to 39284. [2022-03-03 19:51:48,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39284 states, 39283 states have (on average 4.129165287783519) internal successors, (162206), 39283 states have internal predecessors, (162206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39284 states to 39284 states and 162206 transitions. [2022-03-03 19:51:48,719 INFO L78 Accepts]: Start accepts. Automaton has 39284 states and 162206 transitions. Word has length 39 [2022-03-03 19:51:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:48,719 INFO L470 AbstractCegarLoop]: Abstraction has 39284 states and 162206 transitions. [2022-03-03 19:51:48,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 39284 states and 162206 transitions. [2022-03-03 19:51:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:51:48,800 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:48,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:48,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:49,001 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,SelfDestructingSolverStorable37 [2022-03-03 19:51:49,001 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:49,002 INFO L85 PathProgramCache]: Analyzing trace with hash -156228847, now seen corresponding path program 30 times [2022-03-03 19:51:49,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:49,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394190169] [2022-03-03 19:51:49,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:49,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:49,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:49,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394190169] [2022-03-03 19:51:49,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394190169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:49,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453639299] [2022-03-03 19:51:49,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:51:49,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:49,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:49,161 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 19:51:49,162 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 19:51:49,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 19:51:49,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:49,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:51:49,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:49,816 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:51:49,816 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 70 treesize of output 38 [2022-03-03 19:51:49,849 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:51:49,850 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 35 treesize of output 17 [2022-03-03 19:51:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:49,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:50,053 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:50,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-03-03 19:51:50,250 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:50,250 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 47 treesize of output 61 [2022-03-03 19:51:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:50,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453639299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:50,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:50,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:51:50,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823801352] [2022-03-03 19:51:50,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:50,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:51:50,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:50,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:51:50,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:51:50,324 INFO L87 Difference]: Start difference. First operand 39284 states and 162206 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 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 19:51:51,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:51,342 INFO L93 Difference]: Finished difference Result 67397 states and 278775 transitions. [2022-03-03 19:51:51,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:51:51,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 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 39 [2022-03-03 19:51:51,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:51,618 INFO L225 Difference]: With dead ends: 67397 [2022-03-03 19:51:51,618 INFO L226 Difference]: Without dead ends: 67237 [2022-03-03 19:51:51,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:51:51,619 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 221 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:51,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 672 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:51:51,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67237 states. [2022-03-03 19:51:52,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67237 to 39564. [2022-03-03 19:51:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39564 states, 39563 states have (on average 4.127846725475823) internal successors, (163310), 39563 states have internal predecessors, (163310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39564 states to 39564 states and 163310 transitions. [2022-03-03 19:51:52,973 INFO L78 Accepts]: Start accepts. Automaton has 39564 states and 163310 transitions. Word has length 39 [2022-03-03 19:51:52,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:52,974 INFO L470 AbstractCegarLoop]: Abstraction has 39564 states and 163310 transitions. [2022-03-03 19:51:52,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 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 19:51:52,974 INFO L276 IsEmpty]: Start isEmpty. Operand 39564 states and 163310 transitions. [2022-03-03 19:51:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:51:53,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:53,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:53,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:53,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 19:51:53,259 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:53,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:53,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1634145011, now seen corresponding path program 31 times [2022-03-03 19:51:53,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:53,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608960338] [2022-03-03 19:51:53,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:53,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:53,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:53,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608960338] [2022-03-03 19:51:53,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608960338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:53,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221382902] [2022-03-03 19:51:53,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:51:53,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:53,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:53,457 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 19:51:53,458 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 19:51:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:53,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:51:53,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:53,897 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:51:53,897 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 51 treesize of output 33 [2022-03-03 19:51:53,919 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:51:53,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-03-03 19:51:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:54,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:54,359 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:54,359 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 49 treesize of output 67 [2022-03-03 19:51:54,579 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:54,579 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 47 treesize of output 61 [2022-03-03 19:51:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:54,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221382902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:54,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:54,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:51:54,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298313352] [2022-03-03 19:51:54,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:54,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:51:54,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:51:54,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:51:54,658 INFO L87 Difference]: Start difference. First operand 39564 states and 163310 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 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 19:51:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:55,731 INFO L93 Difference]: Finished difference Result 67175 states and 277414 transitions. [2022-03-03 19:51:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:51:55,732 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 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 39 [2022-03-03 19:51:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:56,013 INFO L225 Difference]: With dead ends: 67175 [2022-03-03 19:51:56,013 INFO L226 Difference]: Without dead ends: 67085 [2022-03-03 19:51:56,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:51:56,014 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 249 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:56,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 763 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:51:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67085 states. [2022-03-03 19:51:57,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67085 to 39570. [2022-03-03 19:51:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39570 states, 39569 states have (on average 4.1304051151153685) internal successors, (163436), 39569 states have internal predecessors, (163436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39570 states to 39570 states and 163436 transitions. [2022-03-03 19:51:57,390 INFO L78 Accepts]: Start accepts. Automaton has 39570 states and 163436 transitions. Word has length 39 [2022-03-03 19:51:57,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:57,390 INFO L470 AbstractCegarLoop]: Abstraction has 39570 states and 163436 transitions. [2022-03-03 19:51:57,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 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 19:51:57,390 INFO L276 IsEmpty]: Start isEmpty. Operand 39570 states and 163436 transitions. [2022-03-03 19:51:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:51:57,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:57,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:57,493 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 19:51:57,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 19:51:57,677 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:57,677 INFO L85 PathProgramCache]: Analyzing trace with hash -249818799, now seen corresponding path program 32 times [2022-03-03 19:51:57,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:57,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286215522] [2022-03-03 19:51:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:57,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:57,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:57,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286215522] [2022-03-03 19:51:57,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286215522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:57,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806299173] [2022-03-03 19:51:57,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:51:57,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:57,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:57,835 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 19:51:57,836 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 19:51:57,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:51:57,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:57,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:51:57,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:58,154 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:51:58,155 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 50 treesize of output 28 [2022-03-03 19:51:58,210 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:51:58,210 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 35 treesize of output 17 [2022-03-03 19:51:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:58,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:58,389 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:58,390 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 49 treesize of output 67 [2022-03-03 19:51:58,800 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:51:58,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-03-03 19:51:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:58,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806299173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:58,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:58,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 19:51:58,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777096154] [2022-03-03 19:51:58,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:58,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:51:58,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:58,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:51:58,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:51:58,893 INFO L87 Difference]: Start difference. First operand 39570 states and 163436 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 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 19:51:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:59,608 INFO L93 Difference]: Finished difference Result 55429 states and 230154 transitions. [2022-03-03 19:51:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:51:59,608 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 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 39 [2022-03-03 19:51:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:00,027 INFO L225 Difference]: With dead ends: 55429 [2022-03-03 19:52:00,027 INFO L226 Difference]: Without dead ends: 55374 [2022-03-03 19:52:00,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:52:00,028 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 162 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:00,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 658 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:52:00,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55374 states. [2022-03-03 19:52:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55374 to 39590. [2022-03-03 19:52:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39590 states, 39589 states have (on average 4.127106014296901) internal successors, (163388), 39589 states have internal predecessors, (163388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39590 states to 39590 states and 163388 transitions. [2022-03-03 19:52:01,334 INFO L78 Accepts]: Start accepts. Automaton has 39590 states and 163388 transitions. Word has length 39 [2022-03-03 19:52:01,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:01,334 INFO L470 AbstractCegarLoop]: Abstraction has 39590 states and 163388 transitions. [2022-03-03 19:52:01,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 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 19:52:01,335 INFO L276 IsEmpty]: Start isEmpty. Operand 39590 states and 163388 transitions. [2022-03-03 19:52:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:01,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:01,449 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:01,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:01,663 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,SelfDestructingSolverStorable40 [2022-03-03 19:52:01,663 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:01,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1106922573, now seen corresponding path program 33 times [2022-03-03 19:52:01,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:01,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954015398] [2022-03-03 19:52:01,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:01,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:01,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:01,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954015398] [2022-03-03 19:52:01,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954015398] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:01,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141798818] [2022-03-03 19:52:01,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:52:01,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:01,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:01,856 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 19:52:01,884 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 19:52:01,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:52:01,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:01,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:52:01,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:02,259 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:52:02,259 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 66 treesize of output 34 [2022-03-03 19:52:02,313 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:52:02,313 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 35 [2022-03-03 19:52:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:02,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:03,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:03,123 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:52:03,123 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 47 [2022-03-03 19:52:03,307 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:03,308 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 48 treesize of output 62 [2022-03-03 19:52:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:03,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141798818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:03,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:03,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-03 19:52:03,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668434296] [2022-03-03 19:52:03,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:03,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:52:03,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:03,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:52:03,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:52:03,369 INFO L87 Difference]: Start difference. First operand 39590 states and 163388 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:04,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:04,500 INFO L93 Difference]: Finished difference Result 68005 states and 281081 transitions. [2022-03-03 19:52:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:52:04,500 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:52:04,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:04,744 INFO L225 Difference]: With dead ends: 68005 [2022-03-03 19:52:04,744 INFO L226 Difference]: Without dead ends: 67950 [2022-03-03 19:52:04,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 60 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:52:04,744 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 338 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:04,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 903 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 549 Invalid, 0 Unknown, 433 Unchecked, 0.4s Time] [2022-03-03 19:52:05,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67950 states. [2022-03-03 19:52:06,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67950 to 40559. [2022-03-03 19:52:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40559 states, 40558 states have (on average 4.133315252231372) internal successors, (167639), 40558 states have internal predecessors, (167639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40559 states to 40559 states and 167639 transitions. [2022-03-03 19:52:06,463 INFO L78 Accepts]: Start accepts. Automaton has 40559 states and 167639 transitions. Word has length 39 [2022-03-03 19:52:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:06,463 INFO L470 AbstractCegarLoop]: Abstraction has 40559 states and 167639 transitions. [2022-03-03 19:52:06,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:06,463 INFO L276 IsEmpty]: Start isEmpty. Operand 40559 states and 167639 transitions. [2022-03-03 19:52:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:06,588 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:06,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:06,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:06,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:06,811 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:06,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:06,811 INFO L85 PathProgramCache]: Analyzing trace with hash -326398011, now seen corresponding path program 34 times [2022-03-03 19:52:06,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:06,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325833240] [2022-03-03 19:52:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:06,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:06,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:06,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325833240] [2022-03-03 19:52:06,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325833240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:06,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579048035] [2022-03-03 19:52:06,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:52:06,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:06,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:06,983 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 19:52:06,983 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 19:52:07,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:52:07,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:07,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:52:07,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:07,334 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:52:07,334 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 60 treesize of output 38 [2022-03-03 19:52:07,402 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:52:07,402 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 35 treesize of output 17 [2022-03-03 19:52:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:07,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:07,571 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:07,571 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 49 treesize of output 67 [2022-03-03 19:52:07,771 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:07,772 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 47 treesize of output 61 [2022-03-03 19:52:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:07,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579048035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:07,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:07,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 19:52:07,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103050891] [2022-03-03 19:52:07,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:07,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:52:07,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:07,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:52:07,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:52:07,850 INFO L87 Difference]: Start difference. First operand 40559 states and 167639 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 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 19:52:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:08,957 INFO L93 Difference]: Finished difference Result 68421 states and 284264 transitions. [2022-03-03 19:52:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:52:08,958 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 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 39 [2022-03-03 19:52:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:09,215 INFO L225 Difference]: With dead ends: 68421 [2022-03-03 19:52:09,215 INFO L226 Difference]: Without dead ends: 68366 [2022-03-03 19:52:09,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:52:09,215 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 191 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:09,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 698 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:52:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68366 states. [2022-03-03 19:52:10,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68366 to 39838. [2022-03-03 19:52:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39838 states, 39837 states have (on average 4.128724552551648) internal successors, (164476), 39837 states have internal predecessors, (164476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39838 states to 39838 states and 164476 transitions. [2022-03-03 19:52:10,597 INFO L78 Accepts]: Start accepts. Automaton has 39838 states and 164476 transitions. Word has length 39 [2022-03-03 19:52:10,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:10,597 INFO L470 AbstractCegarLoop]: Abstraction has 39838 states and 164476 transitions. [2022-03-03 19:52:10,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 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 19:52:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 39838 states and 164476 transitions. [2022-03-03 19:52:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:10,993 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:10,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:11,016 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 19:52:11,215 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,SelfDestructingSolverStorable42 [2022-03-03 19:52:11,215 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:11,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:11,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1698692599, now seen corresponding path program 35 times [2022-03-03 19:52:11,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:11,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289905182] [2022-03-03 19:52:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:11,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:11,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:11,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289905182] [2022-03-03 19:52:11,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289905182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:11,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616350051] [2022-03-03 19:52:11,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:52:11,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:11,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:11,389 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 19:52:11,392 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 19:52:11,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:52:11,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:11,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-03 19:52:11,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:11,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:11,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:11,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:11,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:11,822 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2022-03-03 19:52:11,868 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:52:11,868 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 35 treesize of output 35 [2022-03-03 19:52:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:11,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:12,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:12,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:12,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:12,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:12,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 61 [2022-03-03 19:52:13,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:13,033 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:52:13,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-03-03 19:52:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:13,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616350051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:13,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:13,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-03-03 19:52:13,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193845295] [2022-03-03 19:52:13,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:13,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:52:13,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:52:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:52:13,107 INFO L87 Difference]: Start difference. First operand 39838 states and 164476 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:14,328 INFO L93 Difference]: Finished difference Result 51641 states and 212244 transitions. [2022-03-03 19:52:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:52:14,329 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:52:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:14,506 INFO L225 Difference]: With dead ends: 51641 [2022-03-03 19:52:14,506 INFO L226 Difference]: Without dead ends: 51586 [2022-03-03 19:52:14,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=250, Invalid=1556, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:52:14,507 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 345 mSDsluCounter, 2008 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 741 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:14,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1731 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 357 Invalid, 0 Unknown, 741 Unchecked, 0.1s Time] [2022-03-03 19:52:14,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51586 states. [2022-03-03 19:52:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51586 to 40560. [2022-03-03 19:52:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40560 states, 40559 states have (on average 4.132596957518676) internal successors, (167614), 40559 states have internal predecessors, (167614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40560 states to 40560 states and 167614 transitions. [2022-03-03 19:52:15,721 INFO L78 Accepts]: Start accepts. Automaton has 40560 states and 167614 transitions. Word has length 39 [2022-03-03 19:52:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:15,721 INFO L470 AbstractCegarLoop]: Abstraction has 40560 states and 167614 transitions. [2022-03-03 19:52:15,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:15,721 INFO L276 IsEmpty]: Start isEmpty. Operand 40560 states and 167614 transitions. [2022-03-03 19:52:15,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:15,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:15,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:15,856 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 19:52:16,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:16,011 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:16,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:16,011 INFO L85 PathProgramCache]: Analyzing trace with hash 421713277, now seen corresponding path program 36 times [2022-03-03 19:52:16,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:16,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575788015] [2022-03-03 19:52:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:16,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:16,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:16,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575788015] [2022-03-03 19:52:16,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575788015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:16,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295812600] [2022-03-03 19:52:16,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:52:16,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:16,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:16,193 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 19:52:16,194 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 19:52:16,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:52:16,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-03 19:52:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:17,145 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:52:17,146 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 61 treesize of output 39 [2022-03-03 19:52:17,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:17,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:17,219 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 44 treesize of output 14 [2022-03-03 19:52:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:17,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:17,502 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:17,502 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 49 treesize of output 67 [2022-03-03 19:52:17,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:17,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:17,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:17,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:17,928 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 44 treesize of output 52 [2022-03-03 19:52:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:18,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295812600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:18,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:18,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:52:18,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536060861] [2022-03-03 19:52:18,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:18,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:52:18,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:18,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:52:18,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:52:18,063 INFO L87 Difference]: Start difference. First operand 40560 states and 167614 transitions. Second operand has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:19,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:19,503 INFO L93 Difference]: Finished difference Result 79721 states and 325587 transitions. [2022-03-03 19:52:19,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:52:19,504 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:52:19,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:19,989 INFO L225 Difference]: With dead ends: 79721 [2022-03-03 19:52:19,989 INFO L226 Difference]: Without dead ends: 79692 [2022-03-03 19:52:19,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:52:19,990 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 433 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 850 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:19,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1498 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 714 Invalid, 0 Unknown, 850 Unchecked, 0.3s Time] [2022-03-03 19:52:20,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79692 states. [2022-03-03 19:52:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79692 to 46375. [2022-03-03 19:52:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46375 states, 46374 states have (on average 4.153167723293224) internal successors, (192599), 46374 states have internal predecessors, (192599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46375 states to 46375 states and 192599 transitions. [2022-03-03 19:52:21,604 INFO L78 Accepts]: Start accepts. Automaton has 46375 states and 192599 transitions. Word has length 39 [2022-03-03 19:52:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:21,604 INFO L470 AbstractCegarLoop]: Abstraction has 46375 states and 192599 transitions. [2022-03-03 19:52:21,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 46375 states and 192599 transitions. [2022-03-03 19:52:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:21,708 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:21,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:21,723 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 19:52:21,908 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,SelfDestructingSolverStorable44 [2022-03-03 19:52:21,908 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:21,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:21,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1911684639, now seen corresponding path program 37 times [2022-03-03 19:52:21,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:21,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880878625] [2022-03-03 19:52:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:21,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:22,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:22,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880878625] [2022-03-03 19:52:22,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880878625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:22,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680704347] [2022-03-03 19:52:22,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:52:22,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:22,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:22,060 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 19:52:22,319 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 19:52:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:22,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:52:22,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:22,699 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:52:22,700 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 51 treesize of output 33 [2022-03-03 19:52:22,745 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:52:22,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-03-03 19:52:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:22,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:22,926 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:22,926 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 49 treesize of output 67 [2022-03-03 19:52:23,135 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:23,136 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 47 treesize of output 61 [2022-03-03 19:52:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:23,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680704347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:23,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:23,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 19:52:23,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693039356] [2022-03-03 19:52:23,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:23,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:52:23,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:23,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:52:23,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:52:23,205 INFO L87 Difference]: Start difference. First operand 46375 states and 192599 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 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 19:52:24,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:24,248 INFO L93 Difference]: Finished difference Result 72287 states and 301044 transitions. [2022-03-03 19:52:24,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:52:24,249 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 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 39 [2022-03-03 19:52:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:24,527 INFO L225 Difference]: With dead ends: 72287 [2022-03-03 19:52:24,528 INFO L226 Difference]: Without dead ends: 72232 [2022-03-03 19:52:24,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:52:24,528 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 151 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:24,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 800 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:52:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72232 states. [2022-03-03 19:52:25,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72232 to 44169. [2022-03-03 19:52:25,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44169 states, 44168 states have (on average 4.1557009599710195) internal successors, (183549), 44168 states have internal predecessors, (183549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44169 states to 44169 states and 183549 transitions. [2022-03-03 19:52:25,981 INFO L78 Accepts]: Start accepts. Automaton has 44169 states and 183549 transitions. Word has length 39 [2022-03-03 19:52:25,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:25,982 INFO L470 AbstractCegarLoop]: Abstraction has 44169 states and 183549 transitions. [2022-03-03 19:52:25,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 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 19:52:25,982 INFO L276 IsEmpty]: Start isEmpty. Operand 44169 states and 183549 transitions. [2022-03-03 19:52:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:26,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:26,412 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:26,435 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 19:52:26,634 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,SelfDestructingSolverStorable45 [2022-03-03 19:52:26,634 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:26,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:26,635 INFO L85 PathProgramCache]: Analyzing trace with hash -150753277, now seen corresponding path program 38 times [2022-03-03 19:52:26,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:26,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912128095] [2022-03-03 19:52:26,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:26,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:26,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:26,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912128095] [2022-03-03 19:52:26,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912128095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:26,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996294226] [2022-03-03 19:52:26,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:52:26,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:26,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:26,830 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 19:52:26,831 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 19:52:26,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:52:26,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:26,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:52:26,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:27,124 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:52:27,124 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 45 treesize of output 27 [2022-03-03 19:52:27,207 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:52:27,207 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 35 treesize of output 17 [2022-03-03 19:52:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:27,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:27,410 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:27,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 67 [2022-03-03 19:52:27,634 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:27,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-03-03 19:52:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:27,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996294226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:27,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:27,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 19:52:27,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792266195] [2022-03-03 19:52:27,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:27,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:52:27,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:52:27,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:52:27,736 INFO L87 Difference]: Start difference. First operand 44169 states and 183549 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 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 19:52:29,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:29,099 INFO L93 Difference]: Finished difference Result 78189 states and 324845 transitions. [2022-03-03 19:52:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:52:29,100 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 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 39 [2022-03-03 19:52:29,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:29,458 INFO L225 Difference]: With dead ends: 78189 [2022-03-03 19:52:29,458 INFO L226 Difference]: Without dead ends: 77973 [2022-03-03 19:52:29,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:52:29,459 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 218 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:29,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 916 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:52:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77973 states. [2022-03-03 19:52:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77973 to 43817. [2022-03-03 19:52:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43817 states, 43816 states have (on average 4.159325360598868) internal successors, (182245), 43816 states have internal predecessors, (182245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43817 states to 43817 states and 182245 transitions. [2022-03-03 19:52:31,259 INFO L78 Accepts]: Start accepts. Automaton has 43817 states and 182245 transitions. Word has length 39 [2022-03-03 19:52:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:31,259 INFO L470 AbstractCegarLoop]: Abstraction has 43817 states and 182245 transitions. [2022-03-03 19:52:31,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 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 19:52:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 43817 states and 182245 transitions. [2022-03-03 19:52:31,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:31,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:31,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:31,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:31,586 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,SelfDestructingSolverStorable46 [2022-03-03 19:52:31,586 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:31,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:31,587 INFO L85 PathProgramCache]: Analyzing trace with hash -320883415, now seen corresponding path program 39 times [2022-03-03 19:52:31,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:31,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842754850] [2022-03-03 19:52:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:31,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:31,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:31,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842754850] [2022-03-03 19:52:31,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842754850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:31,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426532879] [2022-03-03 19:52:31,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:52:31,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:31,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:31,734 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 19:52:31,735 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 19:52:31,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:52:31,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:31,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:52:31,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:31,952 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:52:31,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 17 [2022-03-03 19:52:32,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:32,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:32,135 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 35 treesize of output 17 [2022-03-03 19:52:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:32,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:32,283 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:32,283 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 42 treesize of output 60 [2022-03-03 19:52:32,514 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:32,515 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 47 treesize of output 61 [2022-03-03 19:52:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:32,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426532879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:32,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:32,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 19:52:32,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559929912] [2022-03-03 19:52:32,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:32,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:52:32,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:32,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:52:32,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:52:32,576 INFO L87 Difference]: Start difference. First operand 43817 states and 182245 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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 19:52:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:33,439 INFO L93 Difference]: Finished difference Result 59210 states and 246913 transitions. [2022-03-03 19:52:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:52:33,443 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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 39 [2022-03-03 19:52:33,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:33,659 INFO L225 Difference]: With dead ends: 59210 [2022-03-03 19:52:33,659 INFO L226 Difference]: Without dead ends: 59207 [2022-03-03 19:52:33,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:52:33,660 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 138 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:33,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 755 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 650 Invalid, 0 Unknown, 250 Unchecked, 0.3s Time] [2022-03-03 19:52:33,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59207 states. [2022-03-03 19:52:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59207 to 42815. [2022-03-03 19:52:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42815 states, 42814 states have (on average 4.16889335264166) internal successors, (178487), 42814 states have internal predecessors, (178487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42815 states to 42815 states and 178487 transitions. [2022-03-03 19:52:34,989 INFO L78 Accepts]: Start accepts. Automaton has 42815 states and 178487 transitions. Word has length 39 [2022-03-03 19:52:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:34,989 INFO L470 AbstractCegarLoop]: Abstraction has 42815 states and 178487 transitions. [2022-03-03 19:52:34,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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 19:52:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 42815 states and 178487 transitions. [2022-03-03 19:52:35,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:35,084 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:35,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:35,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:35,284 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,SelfDestructingSolverStorable47 [2022-03-03 19:52:35,285 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash 2139636749, now seen corresponding path program 40 times [2022-03-03 19:52:35,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:35,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859106124] [2022-03-03 19:52:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:35,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:35,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:35,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859106124] [2022-03-03 19:52:35,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859106124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:35,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18946505] [2022-03-03 19:52:35,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:52:35,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:35,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:35,847 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 19:52:35,848 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 19:52:35,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:52:35,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:35,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:52:35,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:36,110 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:52:36,110 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 39 treesize of output 21 [2022-03-03 19:52:36,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:36,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:36,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:36,266 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 37 treesize of output 17 [2022-03-03 19:52:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:36,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:36,558 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:36,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 77 [2022-03-03 19:52:36,743 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:36,743 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 47 treesize of output 61 [2022-03-03 19:52:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:36,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18946505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:36,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:36,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 19:52:36,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714612642] [2022-03-03 19:52:36,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:36,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:52:36,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:36,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:52:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:52:36,826 INFO L87 Difference]: Start difference. First operand 42815 states and 178487 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 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 19:52:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:38,041 INFO L93 Difference]: Finished difference Result 74101 states and 308133 transitions. [2022-03-03 19:52:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:52:38,042 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 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 39 [2022-03-03 19:52:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:38,326 INFO L225 Difference]: With dead ends: 74101 [2022-03-03 19:52:38,327 INFO L226 Difference]: Without dead ends: 73909 [2022-03-03 19:52:38,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:52:38,327 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 240 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:38,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 1013 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1044 Invalid, 0 Unknown, 219 Unchecked, 0.5s Time] [2022-03-03 19:52:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73909 states. [2022-03-03 19:52:39,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73909 to 43364. [2022-03-03 19:52:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43364 states, 43363 states have (on average 4.1659709890920835) internal successors, (180649), 43363 states have internal predecessors, (180649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:40,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43364 states to 43364 states and 180649 transitions. [2022-03-03 19:52:40,040 INFO L78 Accepts]: Start accepts. Automaton has 43364 states and 180649 transitions. Word has length 39 [2022-03-03 19:52:40,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:40,040 INFO L470 AbstractCegarLoop]: Abstraction has 43364 states and 180649 transitions. [2022-03-03 19:52:40,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 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 19:52:40,041 INFO L276 IsEmpty]: Start isEmpty. Operand 43364 states and 180649 transitions. [2022-03-03 19:52:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:40,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:40,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:40,181 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 19:52:40,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-03 19:52:40,366 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:40,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:40,366 INFO L85 PathProgramCache]: Analyzing trace with hash -577392495, now seen corresponding path program 41 times [2022-03-03 19:52:40,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:40,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118998415] [2022-03-03 19:52:40,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:40,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:40,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:40,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118998415] [2022-03-03 19:52:40,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118998415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:40,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173643249] [2022-03-03 19:52:40,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:52:40,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:40,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:40,548 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 19:52:40,549 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 19:52:40,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:52:40,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:40,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:52:40,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:40,809 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:52:40,809 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 35 [2022-03-03 19:52:41,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:41,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:41,051 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 29 treesize of output 17 [2022-03-03 19:52:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:41,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:41,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:41,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:41,768 INFO L353 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-03-03 19:52:41,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 61 [2022-03-03 19:52:42,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:42,570 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:52:42,570 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-03-03 19:52:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:42,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173643249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:42,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:42,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-03-03 19:52:42,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151515669] [2022-03-03 19:52:42,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:42,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:52:42,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:42,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:52:42,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:52:42,633 INFO L87 Difference]: Start difference. First operand 43364 states and 180649 transitions. Second operand has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:43,364 INFO L93 Difference]: Finished difference Result 55937 states and 230855 transitions. [2022-03-03 19:52:43,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:52:43,369 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:52:43,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:43,764 INFO L225 Difference]: With dead ends: 55937 [2022-03-03 19:52:43,765 INFO L226 Difference]: Without dead ends: 55882 [2022-03-03 19:52:43,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:52:43,765 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 422 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 640 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:43,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 1039 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 360 Invalid, 0 Unknown, 640 Unchecked, 0.2s Time] [2022-03-03 19:52:43,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55882 states. [2022-03-03 19:52:44,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55882 to 44079. [2022-03-03 19:52:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44079 states, 44078 states have (on average 4.159240437406416) internal successors, (183331), 44078 states have internal predecessors, (183331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44079 states to 44079 states and 183331 transitions. [2022-03-03 19:52:45,203 INFO L78 Accepts]: Start accepts. Automaton has 44079 states and 183331 transitions. Word has length 39 [2022-03-03 19:52:45,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:45,203 INFO L470 AbstractCegarLoop]: Abstraction has 44079 states and 183331 transitions. [2022-03-03 19:52:45,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:45,203 INFO L276 IsEmpty]: Start isEmpty. Operand 44079 states and 183331 transitions. [2022-03-03 19:52:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:45,298 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:45,298 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:45,314 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 19:52:45,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-03 19:52:45,498 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:45,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:45,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2010713079, now seen corresponding path program 42 times [2022-03-03 19:52:45,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:45,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474167168] [2022-03-03 19:52:45,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:45,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:45,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:45,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474167168] [2022-03-03 19:52:45,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474167168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:45,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026237207] [2022-03-03 19:52:45,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:52:45,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:45,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:45,682 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 19:52:45,683 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 19:52:45,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:52:45,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:45,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:52:45,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:45,928 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:52:45,928 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 35 [2022-03-03 19:52:46,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:46,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:46,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:46,113 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 27 [2022-03-03 19:52:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:46,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:46,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:46,862 INFO L353 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-03-03 19:52:46,862 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 45 [2022-03-03 19:52:47,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:47,381 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:52:47,382 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 36 [2022-03-03 19:52:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:47,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026237207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:47,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:47,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-03-03 19:52:47,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079215845] [2022-03-03 19:52:47,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:47,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:52:47,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:47,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:52:47,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:52:47,422 INFO L87 Difference]: Start difference. First operand 44079 states and 183331 transitions. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:48,494 INFO L93 Difference]: Finished difference Result 63896 states and 263859 transitions. [2022-03-03 19:52:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:52:48,494 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:52:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:48,725 INFO L225 Difference]: With dead ends: 63896 [2022-03-03 19:52:48,725 INFO L226 Difference]: Without dead ends: 63893 [2022-03-03 19:52:48,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:52:48,725 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 391 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:48,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 1161 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 496 Invalid, 0 Unknown, 385 Unchecked, 0.3s Time] [2022-03-03 19:52:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63893 states. [2022-03-03 19:52:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63893 to 51359. [2022-03-03 19:52:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51359 states, 51358 states have (on average 4.154815218661163) internal successors, (213383), 51358 states have internal predecessors, (213383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51359 states to 51359 states and 213383 transitions. [2022-03-03 19:52:50,219 INFO L78 Accepts]: Start accepts. Automaton has 51359 states and 213383 transitions. Word has length 39 [2022-03-03 19:52:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:50,220 INFO L470 AbstractCegarLoop]: Abstraction has 51359 states and 213383 transitions. [2022-03-03 19:52:50,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 51359 states and 213383 transitions. [2022-03-03 19:52:50,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:50,664 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:50,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:50,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:50,886 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,SelfDestructingSolverStorable50 [2022-03-03 19:52:50,887 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:50,887 INFO L85 PathProgramCache]: Analyzing trace with hash 567694449, now seen corresponding path program 43 times [2022-03-03 19:52:50,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:50,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888575777] [2022-03-03 19:52:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:50,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:51,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:51,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888575777] [2022-03-03 19:52:51,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888575777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:51,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280145351] [2022-03-03 19:52:51,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:52:51,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:51,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:51,080 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 19:52:51,082 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 19:52:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:51,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:52:51,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:51,343 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:52:51,344 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 39 treesize of output 21 [2022-03-03 19:52:51,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:51,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:51,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-03-03 19:52:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:51,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:51,747 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:51,747 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 77 [2022-03-03 19:52:51,937 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:51,938 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 47 treesize of output 61 [2022-03-03 19:52:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:52,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280145351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:52,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:52,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-03 19:52:52,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608516233] [2022-03-03 19:52:52,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:52,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:52:52,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:52:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:52:52,005 INFO L87 Difference]: Start difference. First operand 51359 states and 213383 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 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 19:52:53,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:53,003 INFO L93 Difference]: Finished difference Result 81215 states and 338205 transitions. [2022-03-03 19:52:53,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:52:53,004 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 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 39 [2022-03-03 19:52:53,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:53,582 INFO L225 Difference]: With dead ends: 81215 [2022-03-03 19:52:53,582 INFO L226 Difference]: Without dead ends: 81160 [2022-03-03 19:52:53,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:52:53,583 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 214 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:53,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 713 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 534 Invalid, 0 Unknown, 225 Unchecked, 0.2s Time] [2022-03-03 19:52:53,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81160 states. [2022-03-03 19:52:55,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81160 to 55887. [2022-03-03 19:52:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55887 states, 55886 states have (on average 4.162956733350034) internal successors, (232651), 55886 states have internal predecessors, (232651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:55,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55887 states to 55887 states and 232651 transitions. [2022-03-03 19:52:55,325 INFO L78 Accepts]: Start accepts. Automaton has 55887 states and 232651 transitions. Word has length 39 [2022-03-03 19:52:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:55,325 INFO L470 AbstractCegarLoop]: Abstraction has 55887 states and 232651 transitions. [2022-03-03 19:52:55,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 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 19:52:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 55887 states and 232651 transitions. [2022-03-03 19:52:55,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:55,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:55,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:55,846 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 19:52:56,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:56,039 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:56,040 INFO L85 PathProgramCache]: Analyzing trace with hash 797557105, now seen corresponding path program 44 times [2022-03-03 19:52:56,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:56,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937879823] [2022-03-03 19:52:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:56,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:56,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:56,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937879823] [2022-03-03 19:52:56,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937879823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:56,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446540500] [2022-03-03 19:52:56,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:52:56,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:56,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:56,236 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 19:52:56,264 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 19:52:56,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:52:56,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:56,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:52:56,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:56,500 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:52:56,501 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 35 treesize of output 17 [2022-03-03 19:52:56,650 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:52:56,651 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 35 [2022-03-03 19:52:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:56,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:57,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:57,807 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:52:57,807 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 57 [2022-03-03 19:52:58,026 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:58,026 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 48 treesize of output 62 [2022-03-03 19:52:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:58,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446540500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:58,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:58,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-03 19:52:58,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91790362] [2022-03-03 19:52:58,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:58,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:52:58,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:58,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:52:58,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:52:58,123 INFO L87 Difference]: Start difference. First operand 55887 states and 232651 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:59,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:59,719 INFO L93 Difference]: Finished difference Result 98559 states and 411337 transitions. [2022-03-03 19:52:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:52:59,719 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:52:59,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:00,209 INFO L225 Difference]: With dead ends: 98559 [2022-03-03 19:53:00,209 INFO L226 Difference]: Without dead ends: 98504 [2022-03-03 19:53:00,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:53:00,210 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 527 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 588 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:00,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 889 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 778 Invalid, 0 Unknown, 588 Unchecked, 0.4s Time] [2022-03-03 19:53:00,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98504 states. [2022-03-03 19:53:02,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98504 to 57690. [2022-03-03 19:53:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57690 states, 57689 states have (on average 4.167033576591725) internal successors, (240392), 57689 states have internal predecessors, (240392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:02,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57690 states to 57690 states and 240392 transitions. [2022-03-03 19:53:02,551 INFO L78 Accepts]: Start accepts. Automaton has 57690 states and 240392 transitions. Word has length 39 [2022-03-03 19:53:02,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:02,551 INFO L470 AbstractCegarLoop]: Abstraction has 57690 states and 240392 transitions. [2022-03-03 19:53:02,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:02,551 INFO L276 IsEmpty]: Start isEmpty. Operand 57690 states and 240392 transitions. [2022-03-03 19:53:02,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:02,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:02,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:02,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:02,892 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,SelfDestructingSolverStorable52 [2022-03-03 19:53:02,892 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:02,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:02,893 INFO L85 PathProgramCache]: Analyzing trace with hash -385556789, now seen corresponding path program 45 times [2022-03-03 19:53:02,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:02,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918434272] [2022-03-03 19:53:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:02,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:03,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:03,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918434272] [2022-03-03 19:53:03,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918434272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:03,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272745210] [2022-03-03 19:53:03,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:53:03,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:03,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:03,062 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 19:53:03,063 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 19:53:03,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:53:03,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:03,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:53:03,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:03,303 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:53:03,303 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 21 [2022-03-03 19:53:03,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:03,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:03,767 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 35 treesize of output 17 [2022-03-03 19:53:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:03,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:03,984 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:03,984 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 77 [2022-03-03 19:53:04,151 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:04,151 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 47 treesize of output 61 [2022-03-03 19:53:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:04,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272745210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:04,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:04,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-03 19:53:04,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948474275] [2022-03-03 19:53:04,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:04,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:53:04,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:04,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:53:04,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:53:04,247 INFO L87 Difference]: Start difference. First operand 57690 states and 240392 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 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 19:53:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:05,216 INFO L93 Difference]: Finished difference Result 85443 states and 356471 transitions. [2022-03-03 19:53:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:53:05,216 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 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 39 [2022-03-03 19:53:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:05,611 INFO L225 Difference]: With dead ends: 85443 [2022-03-03 19:53:05,611 INFO L226 Difference]: Without dead ends: 85388 [2022-03-03 19:53:05,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:53:05,612 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 269 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:05,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 493 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 445 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-03-03 19:53:05,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85388 states. [2022-03-03 19:53:07,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85388 to 59136. [2022-03-03 19:53:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59136 states, 59135 states have (on average 4.169256785321721) internal successors, (246549), 59135 states have internal predecessors, (246549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59136 states to 59136 states and 246549 transitions. [2022-03-03 19:53:07,907 INFO L78 Accepts]: Start accepts. Automaton has 59136 states and 246549 transitions. Word has length 39 [2022-03-03 19:53:07,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:07,907 INFO L470 AbstractCegarLoop]: Abstraction has 59136 states and 246549 transitions. [2022-03-03 19:53:07,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 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 19:53:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand 59136 states and 246549 transitions. [2022-03-03 19:53:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:08,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:08,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:08,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-03 19:53:08,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:08,263 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:08,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:08,263 INFO L85 PathProgramCache]: Analyzing trace with hash -441787771, now seen corresponding path program 46 times [2022-03-03 19:53:08,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:08,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096242600] [2022-03-03 19:53:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:08,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:08,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:08,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096242600] [2022-03-03 19:53:08,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096242600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:08,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963645421] [2022-03-03 19:53:08,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:53:08,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:08,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:08,455 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 19:53:08,456 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 19:53:08,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:53:08,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:08,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:53:08,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:08,694 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:53:08,694 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 39 treesize of output 21 [2022-03-03 19:53:09,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:09,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:09,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:09,173 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 37 treesize of output 17 [2022-03-03 19:53:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:09,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:09,393 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:09,393 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 77 [2022-03-03 19:53:09,586 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:09,586 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 47 treesize of output 61 [2022-03-03 19:53:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:09,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963645421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:09,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:09,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-03 19:53:09,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682399430] [2022-03-03 19:53:09,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:09,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:53:09,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:09,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:53:09,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:53:09,667 INFO L87 Difference]: Start difference. First operand 59136 states and 246549 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 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 19:53:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:10,614 INFO L93 Difference]: Finished difference Result 83836 states and 349646 transitions. [2022-03-03 19:53:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:53:10,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 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 39 [2022-03-03 19:53:10,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:10,978 INFO L225 Difference]: With dead ends: 83836 [2022-03-03 19:53:10,978 INFO L226 Difference]: Without dead ends: 83781 [2022-03-03 19:53:10,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:53:10,979 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 291 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:10,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 556 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 506 Invalid, 0 Unknown, 127 Unchecked, 0.2s Time] [2022-03-03 19:53:11,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83781 states. [2022-03-03 19:53:13,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83781 to 57260. [2022-03-03 19:53:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57260 states, 57259 states have (on average 4.1683403482421975) internal successors, (238675), 57259 states have internal predecessors, (238675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:13,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57260 states to 57260 states and 238675 transitions. [2022-03-03 19:53:13,615 INFO L78 Accepts]: Start accepts. Automaton has 57260 states and 238675 transitions. Word has length 39 [2022-03-03 19:53:13,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:13,615 INFO L470 AbstractCegarLoop]: Abstraction has 57260 states and 238675 transitions. [2022-03-03 19:53:13,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 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 19:53:13,616 INFO L276 IsEmpty]: Start isEmpty. Operand 57260 states and 238675 transitions. [2022-03-03 19:53:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:13,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:13,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:13,770 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 19:53:13,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:13,956 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:13,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:13,957 INFO L85 PathProgramCache]: Analyzing trace with hash -822556209, now seen corresponding path program 47 times [2022-03-03 19:53:13,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:13,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583248201] [2022-03-03 19:53:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:13,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:14,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:14,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583248201] [2022-03-03 19:53:14,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583248201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:14,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322000086] [2022-03-03 19:53:14,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:53:14,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:14,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:14,162 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 19:53:14,187 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 19:53:14,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:53:14,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:14,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:53:14,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:14,512 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:53:14,512 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 35 [2022-03-03 19:53:15,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:15,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:15,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:15,101 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 35 treesize of output 17 [2022-03-03 19:53:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:15,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:15,446 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:15,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 72 [2022-03-03 19:53:16,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:16,080 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:53:16,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 41 [2022-03-03 19:53:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:16,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322000086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:16,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:16,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2022-03-03 19:53:16,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025804036] [2022-03-03 19:53:16,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:16,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:53:16,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:16,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:53:16,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:53:16,118 INFO L87 Difference]: Start difference. First operand 57260 states and 238675 transitions. Second operand has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:17,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:17,197 INFO L93 Difference]: Finished difference Result 80807 states and 336182 transitions. [2022-03-03 19:53:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:53:17,197 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:53:17,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:17,514 INFO L225 Difference]: With dead ends: 80807 [2022-03-03 19:53:17,514 INFO L226 Difference]: Without dead ends: 80804 [2022-03-03 19:53:17,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:53:17,514 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 380 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:17,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 841 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 492 Invalid, 0 Unknown, 376 Unchecked, 0.2s Time] [2022-03-03 19:53:17,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80804 states. [2022-03-03 19:53:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80804 to 57809. [2022-03-03 19:53:19,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57809 states, 57808 states have (on average 4.17341890395793) internal successors, (241257), 57808 states have internal predecessors, (241257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57809 states to 57809 states and 241257 transitions. [2022-03-03 19:53:19,470 INFO L78 Accepts]: Start accepts. Automaton has 57809 states and 241257 transitions. Word has length 39 [2022-03-03 19:53:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:19,470 INFO L470 AbstractCegarLoop]: Abstraction has 57809 states and 241257 transitions. [2022-03-03 19:53:19,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 57809 states and 241257 transitions. [2022-03-03 19:53:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:19,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:19,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:20,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:20,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-03 19:53:20,203 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:20,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:20,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1095061371, now seen corresponding path program 48 times [2022-03-03 19:53:20,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:20,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968866279] [2022-03-03 19:53:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:20,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:20,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:20,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968866279] [2022-03-03 19:53:20,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968866279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:20,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589797042] [2022-03-03 19:53:20,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:53:20,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:20,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:20,381 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 19:53:20,381 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 19:53:20,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:53:20,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:20,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:53:20,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:20,634 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:53:20,634 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 35 treesize of output 17 [2022-03-03 19:53:20,769 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:53:20,770 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 35 [2022-03-03 19:53:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:20,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:21,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:21,862 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:53:21,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 57 [2022-03-03 19:53:22,020 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:22,020 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 48 treesize of output 62 [2022-03-03 19:53:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:22,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589797042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:22,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:22,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-03 19:53:22,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069170328] [2022-03-03 19:53:22,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:22,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:53:22,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:22,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:53:22,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:53:22,089 INFO L87 Difference]: Start difference. First operand 57809 states and 241257 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:23,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:23,631 INFO L93 Difference]: Finished difference Result 99004 states and 413752 transitions. [2022-03-03 19:53:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:53:23,632 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:53:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:24,124 INFO L225 Difference]: With dead ends: 99004 [2022-03-03 19:53:24,124 INFO L226 Difference]: Without dead ends: 98997 [2022-03-03 19:53:24,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:53:24,125 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 484 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:24,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 829 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 616 Invalid, 0 Unknown, 503 Unchecked, 0.3s Time] [2022-03-03 19:53:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98997 states. [2022-03-03 19:53:25,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98997 to 53377. [2022-03-03 19:53:25,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53377 states, 53376 states have (on average 4.171987410071942) internal successors, (222684), 53376 states have internal predecessors, (222684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53377 states to 53377 states and 222684 transitions. [2022-03-03 19:53:26,398 INFO L78 Accepts]: Start accepts. Automaton has 53377 states and 222684 transitions. Word has length 39 [2022-03-03 19:53:26,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:26,398 INFO L470 AbstractCegarLoop]: Abstraction has 53377 states and 222684 transitions. [2022-03-03 19:53:26,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 53377 states and 222684 transitions. [2022-03-03 19:53:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:26,526 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:26,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:26,542 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 19:53:26,727 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,SelfDestructingSolverStorable56 [2022-03-03 19:53:26,727 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:26,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1732244979, now seen corresponding path program 49 times [2022-03-03 19:53:26,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:26,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375093897] [2022-03-03 19:53:26,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:26,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:26,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:26,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375093897] [2022-03-03 19:53:26,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375093897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:26,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027524936] [2022-03-03 19:53:26,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:53:26,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:26,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:26,928 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 19:53:26,929 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 19:53:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:26,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:53:26,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:27,247 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:53:27,247 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 49 treesize of output 31 [2022-03-03 19:53:27,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:27,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:27,351 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 37 treesize of output 17 [2022-03-03 19:53:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:27,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:27,607 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:27,607 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 77 [2022-03-03 19:53:28,048 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:28,049 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 47 treesize of output 61 [2022-03-03 19:53:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:28,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027524936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:28,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:28,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:53:28,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483668668] [2022-03-03 19:53:28,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:28,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:53:28,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:28,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:53:28,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:53:28,124 INFO L87 Difference]: Start difference. First operand 53377 states and 222684 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 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 19:53:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:29,331 INFO L93 Difference]: Finished difference Result 93731 states and 390231 transitions. [2022-03-03 19:53:29,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:53:29,332 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 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 39 [2022-03-03 19:53:29,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:29,744 INFO L225 Difference]: With dead ends: 93731 [2022-03-03 19:53:29,745 INFO L226 Difference]: Without dead ends: 93499 [2022-03-03 19:53:29,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:53:29,745 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 268 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:29,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 799 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 842 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2022-03-03 19:53:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93499 states. [2022-03-03 19:53:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93499 to 53489. [2022-03-03 19:53:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53489 states, 53488 states have (on average 4.170729883338319) internal successors, (223084), 53488 states have internal predecessors, (223084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53489 states to 53489 states and 223084 transitions. [2022-03-03 19:53:31,920 INFO L78 Accepts]: Start accepts. Automaton has 53489 states and 223084 transitions. Word has length 39 [2022-03-03 19:53:31,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:31,920 INFO L470 AbstractCegarLoop]: Abstraction has 53489 states and 223084 transitions. [2022-03-03 19:53:31,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 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 19:53:31,921 INFO L276 IsEmpty]: Start isEmpty. Operand 53489 states and 223084 transitions. [2022-03-03 19:53:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:32,060 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:32,060 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:32,075 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 19:53:32,260 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,SelfDestructingSolverStorable57 [2022-03-03 19:53:32,260 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:32,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:32,261 INFO L85 PathProgramCache]: Analyzing trace with hash 945195917, now seen corresponding path program 50 times [2022-03-03 19:53:32,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:32,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795782764] [2022-03-03 19:53:32,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:32,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:32,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:32,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795782764] [2022-03-03 19:53:32,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795782764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:32,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301095694] [2022-03-03 19:53:32,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:53:32,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:32,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:32,457 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 19:53:32,458 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 19:53:32,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:53:32,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:32,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:53:32,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:33,183 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:53:33,183 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 67 treesize of output 45 [2022-03-03 19:53:33,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:33,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:33,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:33,233 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 37 treesize of output 17 [2022-03-03 19:53:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:33,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:33,464 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:33,464 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 77 [2022-03-03 19:53:33,635 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:33,635 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 47 treesize of output 61 [2022-03-03 19:53:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:33,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301095694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:33,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:33,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 19:53:33,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051991902] [2022-03-03 19:53:33,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:33,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:53:33,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:53:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:53:33,736 INFO L87 Difference]: Start difference. First operand 53489 states and 223084 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 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 19:53:34,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:34,812 INFO L93 Difference]: Finished difference Result 83041 states and 345707 transitions. [2022-03-03 19:53:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:53:34,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 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 39 [2022-03-03 19:53:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:35,203 INFO L225 Difference]: With dead ends: 83041 [2022-03-03 19:53:35,203 INFO L226 Difference]: Without dead ends: 82837 [2022-03-03 19:53:35,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:53:35,204 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 218 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:35,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 778 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 736 Invalid, 0 Unknown, 206 Unchecked, 0.3s Time] [2022-03-03 19:53:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82837 states. [2022-03-03 19:53:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82837 to 53657. [2022-03-03 19:53:37,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53657 states, 53656 states have (on average 4.170791710153571) internal successors, (223788), 53656 states have internal predecessors, (223788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53657 states to 53657 states and 223788 transitions. [2022-03-03 19:53:37,276 INFO L78 Accepts]: Start accepts. Automaton has 53657 states and 223788 transitions. Word has length 39 [2022-03-03 19:53:37,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:37,276 INFO L470 AbstractCegarLoop]: Abstraction has 53657 states and 223788 transitions. [2022-03-03 19:53:37,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 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 19:53:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 53657 states and 223788 transitions. [2022-03-03 19:53:37,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:37,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:37,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:37,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:37,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-03 19:53:37,605 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:37,605 INFO L85 PathProgramCache]: Analyzing trace with hash -532720247, now seen corresponding path program 51 times [2022-03-03 19:53:37,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:37,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403353613] [2022-03-03 19:53:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:37,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:37,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:37,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403353613] [2022-03-03 19:53:37,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403353613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:37,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166583075] [2022-03-03 19:53:37,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:53:37,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:37,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:37,799 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 19:53:37,799 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 19:53:37,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:53:37,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:37,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:53:37,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:38,163 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:53:38,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 51 [2022-03-03 19:53:38,222 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:53:38,222 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 48 treesize of output 24 [2022-03-03 19:53:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:38,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:39,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:39,491 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:53:39,492 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 57 [2022-03-03 19:53:39,664 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:39,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 62 [2022-03-03 19:53:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:39,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166583075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:39,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:39,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-03 19:53:39,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973072156] [2022-03-03 19:53:39,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:39,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:53:39,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:39,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:53:39,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:53:39,739 INFO L87 Difference]: Start difference. First operand 53657 states and 223788 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:41,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:41,502 INFO L93 Difference]: Finished difference Result 103103 states and 430059 transitions. [2022-03-03 19:53:41,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:53:41,503 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:53:41,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:42,243 INFO L225 Difference]: With dead ends: 103103 [2022-03-03 19:53:42,244 INFO L226 Difference]: Without dead ends: 103013 [2022-03-03 19:53:42,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:53:42,244 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 541 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1043 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:42,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 1240 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 735 Invalid, 0 Unknown, 1043 Unchecked, 0.3s Time] [2022-03-03 19:53:42,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103013 states. [2022-03-03 19:53:44,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103013 to 54613. [2022-03-03 19:53:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54613 states, 54612 states have (on average 4.16919358382773) internal successors, (227688), 54612 states have internal predecessors, (227688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:44,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54613 states to 54613 states and 227688 transitions. [2022-03-03 19:53:44,557 INFO L78 Accepts]: Start accepts. Automaton has 54613 states and 227688 transitions. Word has length 39 [2022-03-03 19:53:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:44,557 INFO L470 AbstractCegarLoop]: Abstraction has 54613 states and 227688 transitions. [2022-03-03 19:53:44,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:44,558 INFO L276 IsEmpty]: Start isEmpty. Operand 54613 states and 227688 transitions. [2022-03-03 19:53:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:44,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:44,706 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:44,724 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 19:53:44,906 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,SelfDestructingSolverStorable59 [2022-03-03 19:53:44,907 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:44,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:44,907 INFO L85 PathProgramCache]: Analyzing trace with hash -320951507, now seen corresponding path program 52 times [2022-03-03 19:53:44,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:44,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337857557] [2022-03-03 19:53:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:44,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:45,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:45,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337857557] [2022-03-03 19:53:45,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337857557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:45,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442543176] [2022-03-03 19:53:45,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:53:45,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:45,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:45,085 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 19:53:45,086 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 19:53:45,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:53:45,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:45,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:53:45,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:45,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:45,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:45,501 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 54 treesize of output 34 [2022-03-03 19:53:45,558 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:53:45,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 18 [2022-03-03 19:53:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:45,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:45,782 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:45,783 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 77 [2022-03-03 19:53:45,974 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:45,974 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 47 treesize of output 61 [2022-03-03 19:53:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:46,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442543176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:46,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:46,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 19:53:46,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441429824] [2022-03-03 19:53:46,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:46,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:53:46,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:46,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:53:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:53:46,032 INFO L87 Difference]: Start difference. First operand 54613 states and 227688 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 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 19:53:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:47,644 INFO L93 Difference]: Finished difference Result 84470 states and 350765 transitions. [2022-03-03 19:53:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:53:47,645 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 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 39 [2022-03-03 19:53:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:48,028 INFO L225 Difference]: With dead ends: 84470 [2022-03-03 19:53:48,028 INFO L226 Difference]: Without dead ends: 84380 [2022-03-03 19:53:48,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:53:48,029 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 218 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:48,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 779 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 901 Invalid, 0 Unknown, 47 Unchecked, 0.7s Time] [2022-03-03 19:53:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84380 states. [2022-03-03 19:53:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84380 to 53377. [2022-03-03 19:53:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53377 states, 53376 states have (on average 4.171987410071942) internal successors, (222684), 53376 states have internal predecessors, (222684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53377 states to 53377 states and 222684 transitions. [2022-03-03 19:53:50,100 INFO L78 Accepts]: Start accepts. Automaton has 53377 states and 222684 transitions. Word has length 39 [2022-03-03 19:53:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:50,101 INFO L470 AbstractCegarLoop]: Abstraction has 53377 states and 222684 transitions. [2022-03-03 19:53:50,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 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 19:53:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 53377 states and 222684 transitions. [2022-03-03 19:53:50,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:50,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:50,480 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:50,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:50,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:50,699 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:50,700 INFO L85 PathProgramCache]: Analyzing trace with hash 851605965, now seen corresponding path program 53 times [2022-03-03 19:53:50,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:50,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808784471] [2022-03-03 19:53:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:50,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:50,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:50,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808784471] [2022-03-03 19:53:50,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808784471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:50,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24840778] [2022-03-03 19:53:50,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:53:50,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:50,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:50,976 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 19:53:50,977 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 19:53:51,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:53:51,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:51,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:53:51,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:51,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:51,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:51,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:51,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:51,330 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 52 treesize of output 62 [2022-03-03 19:53:51,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:51,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:51,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:51,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:51,454 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 30 treesize of output 11 [2022-03-03 19:53:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:51,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:51,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:51,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:51,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:51,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:51,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 71 [2022-03-03 19:53:52,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:52,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:52,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:52,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:52,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 20 [2022-03-03 19:53:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:52,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24840778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:52,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:52,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-03-03 19:53:52,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714164759] [2022-03-03 19:53:52,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:52,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:53:52,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:52,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:53:52,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:53:52,334 INFO L87 Difference]: Start difference. First operand 53377 states and 222684 transitions. Second operand has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 28 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:55,376 INFO L93 Difference]: Finished difference Result 111731 states and 456915 transitions. [2022-03-03 19:53:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:53:55,377 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 28 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:53:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:55,888 INFO L225 Difference]: With dead ends: 111731 [2022-03-03 19:53:55,888 INFO L226 Difference]: Without dead ends: 111302 [2022-03-03 19:53:55,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=634, Invalid=3148, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:53:55,889 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 871 mSDsluCounter, 2537 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 670 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:55,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 1710 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1670 Invalid, 0 Unknown, 670 Unchecked, 1.0s Time] [2022-03-03 19:53:56,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111302 states. [2022-03-03 19:53:58,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111302 to 60406. [2022-03-03 19:53:58,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60406 states, 60405 states have (on average 4.185713103219932) internal successors, (252838), 60405 states have internal predecessors, (252838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60406 states to 60406 states and 252838 transitions. [2022-03-03 19:53:58,689 INFO L78 Accepts]: Start accepts. Automaton has 60406 states and 252838 transitions. Word has length 39 [2022-03-03 19:53:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:58,689 INFO L470 AbstractCegarLoop]: Abstraction has 60406 states and 252838 transitions. [2022-03-03 19:53:58,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 28 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 60406 states and 252838 transitions. [2022-03-03 19:53:58,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:58,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:58,833 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:58,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:59,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:59,033 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2086619959, now seen corresponding path program 54 times [2022-03-03 19:53:59,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:59,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983229166] [2022-03-03 19:53:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:59,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:59,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:59,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:59,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983229166] [2022-03-03 19:53:59,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983229166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:59,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208911803] [2022-03-03 19:53:59,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:53:59,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:59,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:59,201 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 19:53:59,202 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 19:53:59,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:53:59,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:59,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-03 19:53:59,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:00,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:00,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:00,187 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 47 treesize of output 35 [2022-03-03 19:54:00,228 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:54:00,229 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 35 treesize of output 17 [2022-03-03 19:54:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:00,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:00,528 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:00,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 73 [2022-03-03 19:54:00,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:00,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:00,920 INFO L353 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-03-03 19:54:00,920 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 41 treesize of output 49 [2022-03-03 19:54:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:01,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208911803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:01,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:01,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:54:01,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691222889] [2022-03-03 19:54:01,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:01,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:54:01,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:01,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:54:01,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:54:01,011 INFO L87 Difference]: Start difference. First operand 60406 states and 252838 transitions. Second operand has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:02,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:02,268 INFO L93 Difference]: Finished difference Result 80253 states and 332973 transitions. [2022-03-03 19:54:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:54:02,269 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:54:02,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:02,803 INFO L225 Difference]: With dead ends: 80253 [2022-03-03 19:54:02,803 INFO L226 Difference]: Without dead ends: 80231 [2022-03-03 19:54:02,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:54:02,803 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 332 mSDsluCounter, 1465 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 686 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:02,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 1225 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 479 Invalid, 0 Unknown, 686 Unchecked, 0.2s Time] [2022-03-03 19:54:02,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80231 states. [2022-03-03 19:54:04,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80231 to 64804. [2022-03-03 19:54:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 4.201873370060028) internal successors, (272294), 64803 states have internal predecessors, (272294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 272294 transitions. [2022-03-03 19:54:05,135 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 272294 transitions. Word has length 39 [2022-03-03 19:54:05,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:05,136 INFO L470 AbstractCegarLoop]: Abstraction has 64804 states and 272294 transitions. [2022-03-03 19:54:05,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:05,136 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 272294 transitions. [2022-03-03 19:54:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:05,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:05,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:05,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:05,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:05,503 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:05,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash 520101065, now seen corresponding path program 55 times [2022-03-03 19:54:05,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:05,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841553630] [2022-03-03 19:54:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:05,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:05,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:05,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841553630] [2022-03-03 19:54:05,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841553630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:05,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80521142] [2022-03-03 19:54:05,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:54:05,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:05,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:05,674 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 19:54:05,675 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 19:54:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:05,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:54:05,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:06,074 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:54:06,074 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 43 [2022-03-03 19:54:06,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:06,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:06,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:06,430 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 37 treesize of output 17 [2022-03-03 19:54:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:06,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:06,648 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:06,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2022-03-03 19:54:06,853 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:06,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-03-03 19:54:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:06,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80521142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:06,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:06,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-03 19:54:06,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979967456] [2022-03-03 19:54:06,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:06,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:54:06,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:06,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:54:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:54:06,928 INFO L87 Difference]: Start difference. First operand 64804 states and 272294 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 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 19:54:08,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:08,042 INFO L93 Difference]: Finished difference Result 100140 states and 420081 transitions. [2022-03-03 19:54:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:54:08,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 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 39 [2022-03-03 19:54:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:08,491 INFO L225 Difference]: With dead ends: 100140 [2022-03-03 19:54:08,491 INFO L226 Difference]: Without dead ends: 100085 [2022-03-03 19:54:08,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:54:08,492 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 203 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:08,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 772 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 681 Invalid, 0 Unknown, 268 Unchecked, 0.3s Time] [2022-03-03 19:54:08,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100085 states. [2022-03-03 19:54:10,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100085 to 63754. [2022-03-03 19:54:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63754 states, 63753 states have (on average 4.206107947861277) internal successors, (268152), 63753 states have internal predecessors, (268152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63754 states to 63754 states and 268152 transitions. [2022-03-03 19:54:11,140 INFO L78 Accepts]: Start accepts. Automaton has 63754 states and 268152 transitions. Word has length 39 [2022-03-03 19:54:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:11,140 INFO L470 AbstractCegarLoop]: Abstraction has 63754 states and 268152 transitions. [2022-03-03 19:54:11,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 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 19:54:11,140 INFO L276 IsEmpty]: Start isEmpty. Operand 63754 states and 268152 transitions. [2022-03-03 19:54:11,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:11,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:11,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:11,329 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 19:54:11,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:11,514 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:11,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:11,514 INFO L85 PathProgramCache]: Analyzing trace with hash -597267835, now seen corresponding path program 56 times [2022-03-03 19:54:11,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:11,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314287141] [2022-03-03 19:54:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:11,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:11,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:11,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314287141] [2022-03-03 19:54:11,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314287141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:11,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073829286] [2022-03-03 19:54:11,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:54:11,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:11,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:11,691 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 19:54:11,692 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 19:54:11,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:54:11,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:11,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:54:11,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:12,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:12,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:12,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:12,105 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 75 treesize of output 47 [2022-03-03 19:54:12,129 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:54:12,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 18 [2022-03-03 19:54:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:12,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:12,354 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:12,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 77 [2022-03-03 19:54:12,533 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:12,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-03-03 19:54:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:12,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073829286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:12,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:12,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-03 19:54:12,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563895399] [2022-03-03 19:54:12,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:12,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:54:12,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:12,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:54:12,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:54:12,609 INFO L87 Difference]: Start difference. First operand 63754 states and 268152 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 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 19:54:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:14,008 INFO L93 Difference]: Finished difference Result 95660 states and 401542 transitions. [2022-03-03 19:54:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:54:14,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 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 39 [2022-03-03 19:54:14,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:14,463 INFO L225 Difference]: With dead ends: 95660 [2022-03-03 19:54:14,463 INFO L226 Difference]: Without dead ends: 95605 [2022-03-03 19:54:14,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:54:14,463 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 219 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:14,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 769 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 634 Invalid, 0 Unknown, 162 Unchecked, 0.3s Time] [2022-03-03 19:54:14,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95605 states. [2022-03-03 19:54:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95605 to 64286. [2022-03-03 19:54:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64286 states, 64285 states have (on average 4.207684529828109) internal successors, (270491), 64285 states have internal predecessors, (270491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64286 states to 64286 states and 270491 transitions. [2022-03-03 19:54:16,926 INFO L78 Accepts]: Start accepts. Automaton has 64286 states and 270491 transitions. Word has length 39 [2022-03-03 19:54:16,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:16,926 INFO L470 AbstractCegarLoop]: Abstraction has 64286 states and 270491 transitions. [2022-03-03 19:54:16,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 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 19:54:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 64286 states and 270491 transitions. [2022-03-03 19:54:17,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:17,092 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:17,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:17,111 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 19:54:17,301 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,SelfDestructingSolverStorable64 [2022-03-03 19:54:17,302 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:17,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1638516667, now seen corresponding path program 57 times [2022-03-03 19:54:17,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:17,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970230380] [2022-03-03 19:54:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:17,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:17,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:17,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970230380] [2022-03-03 19:54:17,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970230380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:17,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579151839] [2022-03-03 19:54:17,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:54:17,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:17,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:17,860 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 19:54:17,861 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 19:54:17,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:54:17,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:17,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:54:17,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:18,343 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:54:18,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 51 [2022-03-03 19:54:18,407 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:54:18,407 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 48 treesize of output 24 [2022-03-03 19:54:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:18,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:19,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:19,411 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:54:19,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 57 [2022-03-03 19:54:19,579 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:19,579 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 48 treesize of output 62 [2022-03-03 19:54:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:19,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579151839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:19,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:19,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-03 19:54:19,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469757423] [2022-03-03 19:54:19,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:19,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:54:19,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:19,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:54:19,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:54:19,678 INFO L87 Difference]: Start difference. First operand 64286 states and 270491 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:22,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:22,177 INFO L93 Difference]: Finished difference Result 138317 states and 580141 transitions. [2022-03-03 19:54:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:54:22,177 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:54:22,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:23,219 INFO L225 Difference]: With dead ends: 138317 [2022-03-03 19:54:23,219 INFO L226 Difference]: Without dead ends: 138255 [2022-03-03 19:54:23,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 58 SyntacticMatches, 10 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:54:23,219 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 576 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 686 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:23,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 1248 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1102 Invalid, 0 Unknown, 686 Unchecked, 0.5s Time] [2022-03-03 19:54:23,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138255 states. [2022-03-03 19:54:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138255 to 64280. [2022-03-03 19:54:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64280 states, 64279 states have (on average 4.20775058728356) internal successors, (270470), 64279 states have internal predecessors, (270470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64280 states to 64280 states and 270470 transitions. [2022-03-03 19:54:26,498 INFO L78 Accepts]: Start accepts. Automaton has 64280 states and 270470 transitions. Word has length 39 [2022-03-03 19:54:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:26,498 INFO L470 AbstractCegarLoop]: Abstraction has 64280 states and 270470 transitions. [2022-03-03 19:54:26,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:26,499 INFO L276 IsEmpty]: Start isEmpty. Operand 64280 states and 270470 transitions. [2022-03-03 19:54:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:26,673 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:26,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:26,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:26,873 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,SelfDestructingSolverStorable65 [2022-03-03 19:54:26,873 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:26,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1012065451, now seen corresponding path program 58 times [2022-03-03 19:54:26,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:26,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506153323] [2022-03-03 19:54:26,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:26,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:27,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:27,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506153323] [2022-03-03 19:54:27,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506153323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:27,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495392098] [2022-03-03 19:54:27,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:54:27,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:27,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:27,064 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 19:54:27,065 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 19:54:27,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:54:27,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:27,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:54:27,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:27,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:27,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:27,558 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 75 treesize of output 47 [2022-03-03 19:54:27,582 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:54:27,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 18 [2022-03-03 19:54:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:27,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:27,791 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:27,791 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 77 [2022-03-03 19:54:28,293 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:28,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-03-03 19:54:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:28,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495392098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:28,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:28,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-03 19:54:28,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945217674] [2022-03-03 19:54:28,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:28,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:54:28,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:28,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:54:28,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:54:28,367 INFO L87 Difference]: Start difference. First operand 64280 states and 270470 transitions. Second operand has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 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 19:54:29,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:29,583 INFO L93 Difference]: Finished difference Result 97472 states and 410047 transitions. [2022-03-03 19:54:29,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:54:29,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 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 39 [2022-03-03 19:54:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:30,016 INFO L225 Difference]: With dead ends: 97472 [2022-03-03 19:54:30,016 INFO L226 Difference]: Without dead ends: 97465 [2022-03-03 19:54:30,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:54:30,017 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 210 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:30,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 768 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 843 Invalid, 0 Unknown, 215 Unchecked, 0.4s Time] [2022-03-03 19:54:30,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97465 states. [2022-03-03 19:54:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97465 to 64014. [2022-03-03 19:54:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64014 states, 64013 states have (on average 4.20677049974224) internal successors, (269288), 64013 states have internal predecessors, (269288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64014 states to 64014 states and 269288 transitions. [2022-03-03 19:54:32,627 INFO L78 Accepts]: Start accepts. Automaton has 64014 states and 269288 transitions. Word has length 39 [2022-03-03 19:54:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:32,627 INFO L470 AbstractCegarLoop]: Abstraction has 64014 states and 269288 transitions. [2022-03-03 19:54:32,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 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 19:54:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 64014 states and 269288 transitions. [2022-03-03 19:54:33,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:33,084 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:33,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:33,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:33,306 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,SelfDestructingSolverStorable66 [2022-03-03 19:54:33,307 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:33,307 INFO L85 PathProgramCache]: Analyzing trace with hash -277661645, now seen corresponding path program 59 times [2022-03-03 19:54:33,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:33,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629506266] [2022-03-03 19:54:33,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:33,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:33,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:33,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629506266] [2022-03-03 19:54:33,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629506266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:33,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694562434] [2022-03-03 19:54:33,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:54:33,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:33,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:33,728 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 19:54:33,795 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 19:54:33,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:54:33,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:33,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-03 19:54:33,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:34,184 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:54:34,184 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 37 treesize of output 41 [2022-03-03 19:54:34,350 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:54:34,351 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 35 [2022-03-03 19:54:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:34,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:36,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:36,190 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:54:36,191 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 53 [2022-03-03 19:54:36,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:36,759 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:54:36,759 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-03-03 19:54:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:36,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694562434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:36,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:36,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-03-03 19:54:36,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754534189] [2022-03-03 19:54:36,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:36,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:54:36,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:36,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:54:36,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:54:36,801 INFO L87 Difference]: Start difference. First operand 64014 states and 269288 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:37,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:37,937 INFO L93 Difference]: Finished difference Result 81112 states and 338143 transitions. [2022-03-03 19:54:37,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:54:37,938 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:54:37,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:38,263 INFO L225 Difference]: With dead ends: 81112 [2022-03-03 19:54:38,263 INFO L226 Difference]: Without dead ends: 80792 [2022-03-03 19:54:38,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:54:38,264 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 347 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:38,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 1285 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 338 Invalid, 0 Unknown, 441 Unchecked, 0.2s Time] [2022-03-03 19:54:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80792 states. [2022-03-03 19:54:40,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80792 to 65453. [2022-03-03 19:54:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65453 states, 65452 states have (on average 4.196540976593534) internal successors, (274672), 65452 states have internal predecessors, (274672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65453 states to 65453 states and 274672 transitions. [2022-03-03 19:54:40,479 INFO L78 Accepts]: Start accepts. Automaton has 65453 states and 274672 transitions. Word has length 39 [2022-03-03 19:54:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:40,480 INFO L470 AbstractCegarLoop]: Abstraction has 65453 states and 274672 transitions. [2022-03-03 19:54:40,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 65453 states and 274672 transitions. [2022-03-03 19:54:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:40,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:40,642 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:40,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:40,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:40,843 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:40,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:40,843 INFO L85 PathProgramCache]: Analyzing trace with hash 242274295, now seen corresponding path program 60 times [2022-03-03 19:54:40,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:40,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220762825] [2022-03-03 19:54:40,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:40,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:41,428 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:41,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220762825] [2022-03-03 19:54:41,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220762825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:41,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795091284] [2022-03-03 19:54:41,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:54:41,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:41,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:41,430 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 19:54:41,431 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 19:54:41,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 19:54:41,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:41,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-03 19:54:41,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:41,797 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:54:41,797 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 37 treesize of output 41 [2022-03-03 19:54:42,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:42,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:42,098 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 39 treesize of output 43 [2022-03-03 19:54:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:42,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:43,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:43,787 INFO L353 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-03-03 19:54:43,787 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 49 treesize of output 45 [2022-03-03 19:54:44,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:44,330 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:54:44,330 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-03-03 19:54:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:44,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795091284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:44,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:44,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-03-03 19:54:44,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522889887] [2022-03-03 19:54:44,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:44,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:54:44,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:44,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:54:44,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:54:44,385 INFO L87 Difference]: Start difference. First operand 65453 states and 274672 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:47,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:47,518 INFO L93 Difference]: Finished difference Result 155510 states and 648621 transitions. [2022-03-03 19:54:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 19:54:47,519 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:54:47,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:48,656 INFO L225 Difference]: With dead ends: 155510 [2022-03-03 19:54:48,656 INFO L226 Difference]: Without dead ends: 155420 [2022-03-03 19:54:48,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 64 SyntacticMatches, 15 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=544, Invalid=2648, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:54:48,657 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 599 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 2138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1348 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:48,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 1611 Invalid, 2138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 735 Invalid, 0 Unknown, 1348 Unchecked, 0.4s Time] [2022-03-03 19:54:48,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155420 states. [2022-03-03 19:54:51,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155420 to 66053. [2022-03-03 19:54:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66053 states, 66052 states have (on average 4.19469508871798) internal successors, (277068), 66052 states have internal predecessors, (277068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66053 states to 66053 states and 277068 transitions. [2022-03-03 19:54:52,008 INFO L78 Accepts]: Start accepts. Automaton has 66053 states and 277068 transitions. Word has length 39 [2022-03-03 19:54:52,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:52,008 INFO L470 AbstractCegarLoop]: Abstraction has 66053 states and 277068 transitions. [2022-03-03 19:54:52,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 66053 states and 277068 transitions. [2022-03-03 19:54:52,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:52,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:52,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:52,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:52,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:52,392 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:52,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:52,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1404980109, now seen corresponding path program 61 times [2022-03-03 19:54:52,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:52,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21879514] [2022-03-03 19:54:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:52,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:52,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:52,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21879514] [2022-03-03 19:54:52,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21879514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:52,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622281508] [2022-03-03 19:54:52,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:54:52,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:52,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:52,585 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 19:54:52,586 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 19:54:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:52,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:54:52,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:52,960 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:54:52,961 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 49 treesize of output 31 [2022-03-03 19:54:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:53,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:53,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:53,057 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 37 treesize of output 17 [2022-03-03 19:54:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:53,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:53,327 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:53,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 77 [2022-03-03 19:54:53,835 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:53,835 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 47 treesize of output 61 [2022-03-03 19:54:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:53,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622281508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:53,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:53,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:54:53,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282765141] [2022-03-03 19:54:53,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:53,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:54:53,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:53,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:54:53,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:54:53,919 INFO L87 Difference]: Start difference. First operand 66053 states and 277068 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 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 19:54:55,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:55,235 INFO L93 Difference]: Finished difference Result 104374 states and 435873 transitions. [2022-03-03 19:54:55,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:54:55,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 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 39 [2022-03-03 19:54:55,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:55,719 INFO L225 Difference]: With dead ends: 104374 [2022-03-03 19:54:55,719 INFO L226 Difference]: Without dead ends: 104086 [2022-03-03 19:54:55,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:54:55,720 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 241 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:55,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 843 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 942 Invalid, 0 Unknown, 114 Unchecked, 0.4s Time] [2022-03-03 19:54:56,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104086 states. [2022-03-03 19:54:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104086 to 64250. [2022-03-03 19:54:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64250 states, 64249 states have (on average 4.204423415150431) internal successors, (270130), 64249 states have internal predecessors, (270130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:58,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64250 states to 64250 states and 270130 transitions. [2022-03-03 19:54:58,441 INFO L78 Accepts]: Start accepts. Automaton has 64250 states and 270130 transitions. Word has length 39 [2022-03-03 19:54:58,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:58,441 INFO L470 AbstractCegarLoop]: Abstraction has 64250 states and 270130 transitions. [2022-03-03 19:54:58,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 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 19:54:58,441 INFO L276 IsEmpty]: Start isEmpty. Operand 64250 states and 270130 transitions. [2022-03-03 19:54:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:58,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:58,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:58,622 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 19:54:58,807 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,SelfDestructingSolverStorable69 [2022-03-03 19:54:58,807 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:58,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:58,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1064710707, now seen corresponding path program 62 times [2022-03-03 19:54:58,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:58,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210533567] [2022-03-03 19:54:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:58,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:59,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:59,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210533567] [2022-03-03 19:54:59,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210533567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:59,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919911387] [2022-03-03 19:54:59,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:54:59,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:59,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:59,029 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 19:54:59,031 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 19:54:59,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:54:59,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:59,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:54:59,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:59,559 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:54:59,559 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 67 treesize of output 45 [2022-03-03 19:54:59,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:59,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:59,613 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 54 treesize of output 18 [2022-03-03 19:54:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:59,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:59,860 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:59,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 77 [2022-03-03 19:55:00,372 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:00,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-03-03 19:55:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:00,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919911387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:00,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:00,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 19:55:00,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353292637] [2022-03-03 19:55:00,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:00,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:55:00,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:00,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:55:00,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:55:00,438 INFO L87 Difference]: Start difference. First operand 64250 states and 270130 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 19 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 19:55:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:01,644 INFO L93 Difference]: Finished difference Result 98473 states and 412117 transitions. [2022-03-03 19:55:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:55:01,645 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 19 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 39 [2022-03-03 19:55:01,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:02,096 INFO L225 Difference]: With dead ends: 98473 [2022-03-03 19:55:02,096 INFO L226 Difference]: Without dead ends: 98243 [2022-03-03 19:55:02,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:55:02,096 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 252 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:02,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 802 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 710 Invalid, 0 Unknown, 307 Unchecked, 0.3s Time] [2022-03-03 19:55:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98243 states. [2022-03-03 19:55:04,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98243 to 64516. [2022-03-03 19:55:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64516 states, 64515 states have (on average 4.2048980857165) internal successors, (271279), 64515 states have internal predecessors, (271279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64516 states to 64516 states and 271279 transitions. [2022-03-03 19:55:04,735 INFO L78 Accepts]: Start accepts. Automaton has 64516 states and 271279 transitions. Word has length 39 [2022-03-03 19:55:04,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:04,735 INFO L470 AbstractCegarLoop]: Abstraction has 64516 states and 271279 transitions. [2022-03-03 19:55:04,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 19 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 19:55:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 64516 states and 271279 transitions. [2022-03-03 19:55:04,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:04,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:04,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:04,937 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 19:55:05,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:05,121 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:05,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:05,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1752340425, now seen corresponding path program 63 times [2022-03-03 19:55:05,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:05,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169767522] [2022-03-03 19:55:05,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:05,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:05,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:05,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169767522] [2022-03-03 19:55:05,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169767522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:05,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875208108] [2022-03-03 19:55:05,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:55:05,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:05,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:05,352 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 19:55:05,353 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 19:55:05,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:55:05,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:05,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 19:55:05,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:05,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:05,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:05,778 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 65 treesize of output 65 [2022-03-03 19:55:05,872 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:55:05,872 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 50 treesize of output 26 [2022-03-03 19:55:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:05,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:06,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:06,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:06,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:06,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:06,379 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 57 [2022-03-03 19:55:06,883 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:06,883 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 74 [2022-03-03 19:55:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:07,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875208108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:07,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:07,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-03 19:55:07,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559854305] [2022-03-03 19:55:07,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:07,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:55:07,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:07,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:55:07,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:55:07,012 INFO L87 Difference]: Start difference. First operand 64516 states and 271279 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:08,343 INFO L93 Difference]: Finished difference Result 95807 states and 400697 transitions. [2022-03-03 19:55:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:55:08,343 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:55:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:08,739 INFO L225 Difference]: With dead ends: 95807 [2022-03-03 19:55:08,740 INFO L226 Difference]: Without dead ends: 95717 [2022-03-03 19:55:08,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:55:08,740 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 371 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 834 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:08,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 1154 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 551 Invalid, 0 Unknown, 834 Unchecked, 0.3s Time] [2022-03-03 19:55:08,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95717 states. [2022-03-03 19:55:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95717 to 65089. [2022-03-03 19:55:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65089 states, 65088 states have (on average 4.203463003933137) internal successors, (273595), 65088 states have internal predecessors, (273595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:11,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65089 states to 65089 states and 273595 transitions. [2022-03-03 19:55:11,568 INFO L78 Accepts]: Start accepts. Automaton has 65089 states and 273595 transitions. Word has length 39 [2022-03-03 19:55:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:11,568 INFO L470 AbstractCegarLoop]: Abstraction has 65089 states and 273595 transitions. [2022-03-03 19:55:11,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:11,569 INFO L276 IsEmpty]: Start isEmpty. Operand 65089 states and 273595 transitions. [2022-03-03 19:55:11,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:11,812 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:11,812 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:11,829 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 19:55:12,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:12,013 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1964109165, now seen corresponding path program 64 times [2022-03-03 19:55:12,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:12,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180680998] [2022-03-03 19:55:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:12,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:12,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:12,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180680998] [2022-03-03 19:55:12,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180680998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:12,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800300579] [2022-03-03 19:55:12,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:55:12,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:12,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:12,208 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 19:55:12,209 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 19:55:12,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:55:12,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:12,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:55:12,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:12,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:12,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:12,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:12,630 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 54 treesize of output 34 [2022-03-03 19:55:12,687 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:55:12,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 18 [2022-03-03 19:55:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:12,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:12,916 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:12,916 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 77 [2022-03-03 19:55:13,091 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:13,091 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 47 treesize of output 61 [2022-03-03 19:55:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:13,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800300579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:13,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:13,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 19:55:13,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386904656] [2022-03-03 19:55:13,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:13,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:55:13,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:13,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:55:13,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:55:13,172 INFO L87 Difference]: Start difference. First operand 65089 states and 273595 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 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 19:55:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:14,988 INFO L93 Difference]: Finished difference Result 99143 states and 414605 transitions. [2022-03-03 19:55:14,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:55:14,989 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 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 39 [2022-03-03 19:55:14,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:15,479 INFO L225 Difference]: With dead ends: 99143 [2022-03-03 19:55:15,480 INFO L226 Difference]: Without dead ends: 99113 [2022-03-03 19:55:15,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:55:15,480 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 294 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:15,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 791 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 886 Invalid, 0 Unknown, 108 Unchecked, 0.4s Time] [2022-03-03 19:55:15,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99113 states. [2022-03-03 19:55:17,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99113 to 65353. [2022-03-03 19:55:17,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65353 states, 65352 states have (on average 4.204813930713674) internal successors, (274793), 65352 states have internal predecessors, (274793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65353 states to 65353 states and 274793 transitions. [2022-03-03 19:55:18,383 INFO L78 Accepts]: Start accepts. Automaton has 65353 states and 274793 transitions. Word has length 39 [2022-03-03 19:55:18,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:18,383 INFO L470 AbstractCegarLoop]: Abstraction has 65353 states and 274793 transitions. [2022-03-03 19:55:18,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 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 19:55:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 65353 states and 274793 transitions. [2022-03-03 19:55:18,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:18,938 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:18,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:19,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-03 19:55:19,138 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,SelfDestructingSolverStorable72 [2022-03-03 19:55:19,139 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:19,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:19,141 INFO L85 PathProgramCache]: Analyzing trace with hash 918841893, now seen corresponding path program 65 times [2022-03-03 19:55:19,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:19,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837594208] [2022-03-03 19:55:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:19,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:19,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:19,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837594208] [2022-03-03 19:55:19,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837594208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:19,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183833663] [2022-03-03 19:55:19,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:55:19,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:19,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:19,448 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 19:55:19,496 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 19:55:19,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:55:19,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:19,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-03 19:55:19,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:20,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:20,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:20,345 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 51 treesize of output 39 [2022-03-03 19:55:20,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:20,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:20,405 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 35 treesize of output 17 [2022-03-03 19:55:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:20,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:20,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:20,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:20,787 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-03-03 19:55:20,788 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 52 treesize of output 64 [2022-03-03 19:55:21,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:21,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:21,394 INFO L353 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-03-03 19:55:21,394 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 41 treesize of output 49 [2022-03-03 19:55:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:21,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183833663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:21,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:21,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:55:21,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573566621] [2022-03-03 19:55:21,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:21,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:55:21,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:55:21,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:55:21,512 INFO L87 Difference]: Start difference. First operand 65353 states and 274793 transitions. Second operand has 25 states, 25 states have (on average 4.0) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:22,808 INFO L93 Difference]: Finished difference Result 89839 states and 372023 transitions. [2022-03-03 19:55:22,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:55:22,809 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:55:22,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:23,204 INFO L225 Difference]: With dead ends: 89839 [2022-03-03 19:55:23,204 INFO L226 Difference]: Without dead ends: 89751 [2022-03-03 19:55:23,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:55:23,204 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 339 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 569 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:23,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 976 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 259 Invalid, 0 Unknown, 569 Unchecked, 0.1s Time] [2022-03-03 19:55:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89751 states. [2022-03-03 19:55:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89751 to 66346. [2022-03-03 19:55:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66346 states, 66345 states have (on average 4.199804054563268) internal successors, (278636), 66345 states have internal predecessors, (278636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66346 states to 66346 states and 278636 transitions. [2022-03-03 19:55:25,867 INFO L78 Accepts]: Start accepts. Automaton has 66346 states and 278636 transitions. Word has length 39 [2022-03-03 19:55:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:25,867 INFO L470 AbstractCegarLoop]: Abstraction has 66346 states and 278636 transitions. [2022-03-03 19:55:25,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 66346 states and 278636 transitions. [2022-03-03 19:55:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:26,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:26,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:26,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:26,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:26,274 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:26,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1883093389, now seen corresponding path program 66 times [2022-03-03 19:55:26,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:26,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728655697] [2022-03-03 19:55:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:26,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:26,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:26,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728655697] [2022-03-03 19:55:26,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728655697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:26,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121441768] [2022-03-03 19:55:26,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:55:26,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:26,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:26,468 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 19:55:26,469 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 19:55:26,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:55:26,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:26,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-03 19:55:26,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:26,908 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:55:26,909 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 65 treesize of output 39 [2022-03-03 19:55:26,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:26,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:26,979 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 35 treesize of output 17 [2022-03-03 19:55:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:27,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:27,201 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:27,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 76 [2022-03-03 19:55:27,388 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:27,388 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 47 treesize of output 61 [2022-03-03 19:55:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:27,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121441768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:27,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:27,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-03 19:55:27,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942001787] [2022-03-03 19:55:27,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:27,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:55:27,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:27,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:55:27,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:55:27,453 INFO L87 Difference]: Start difference. First operand 66346 states and 278636 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 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 19:55:28,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:28,881 INFO L93 Difference]: Finished difference Result 97863 states and 409606 transitions. [2022-03-03 19:55:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:55:28,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 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 39 [2022-03-03 19:55:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:29,336 INFO L225 Difference]: With dead ends: 97863 [2022-03-03 19:55:29,336 INFO L226 Difference]: Without dead ends: 97703 [2022-03-03 19:55:29,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:55:29,336 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 209 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:29,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 751 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 586 Invalid, 0 Unknown, 426 Unchecked, 0.3s Time] [2022-03-03 19:55:29,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97703 states. [2022-03-03 19:55:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97703 to 66339. [2022-03-03 19:55:31,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66339 states, 66338 states have (on average 4.1999005095118935) internal successors, (278613), 66338 states have internal predecessors, (278613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66339 states to 66339 states and 278613 transitions. [2022-03-03 19:55:31,856 INFO L78 Accepts]: Start accepts. Automaton has 66339 states and 278613 transitions. Word has length 39 [2022-03-03 19:55:31,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:31,856 INFO L470 AbstractCegarLoop]: Abstraction has 66339 states and 278613 transitions. [2022-03-03 19:55:31,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 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 19:55:31,856 INFO L276 IsEmpty]: Start isEmpty. Operand 66339 states and 278613 transitions. [2022-03-03 19:55:32,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:32,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:32,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:32,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:32,611 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,SelfDestructingSolverStorable74 [2022-03-03 19:55:32,612 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:32,612 INFO L85 PathProgramCache]: Analyzing trace with hash 116528589, now seen corresponding path program 67 times [2022-03-03 19:55:32,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:32,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264389767] [2022-03-03 19:55:32,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:32,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:32,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:32,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264389767] [2022-03-03 19:55:32,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264389767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:32,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745473564] [2022-03-03 19:55:32,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:55:32,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:32,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:32,812 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 19:55:32,813 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 19:55:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:32,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:55:32,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:33,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:33,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:33,196 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 44 treesize of output 24 [2022-03-03 19:55:33,243 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:55:33,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-03-03 19:55:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:33,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:33,476 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:33,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 77 [2022-03-03 19:55:33,667 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:33,668 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 47 treesize of output 61 [2022-03-03 19:55:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:33,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745473564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:33,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:33,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-03 19:55:33,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343585041] [2022-03-03 19:55:33,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:33,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:55:33,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:33,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:55:33,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:55:33,726 INFO L87 Difference]: Start difference. First operand 66339 states and 278613 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 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 19:55:34,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:34,844 INFO L93 Difference]: Finished difference Result 85694 states and 358259 transitions. [2022-03-03 19:55:34,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:55:34,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 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 39 [2022-03-03 19:55:34,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:35,418 INFO L225 Difference]: With dead ends: 85694 [2022-03-03 19:55:35,418 INFO L226 Difference]: Without dead ends: 85604 [2022-03-03 19:55:35,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:55:35,419 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 247 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:35,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 671 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 768 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2022-03-03 19:55:35,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85604 states. [2022-03-03 19:55:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85604 to 66523. [2022-03-03 19:55:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66523 states, 66522 states have (on average 4.198746279426355) internal successors, (279309), 66522 states have internal predecessors, (279309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66523 states to 66523 states and 279309 transitions. [2022-03-03 19:55:37,682 INFO L78 Accepts]: Start accepts. Automaton has 66523 states and 279309 transitions. Word has length 39 [2022-03-03 19:55:37,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:37,683 INFO L470 AbstractCegarLoop]: Abstraction has 66523 states and 279309 transitions. [2022-03-03 19:55:37,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 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 19:55:37,683 INFO L276 IsEmpty]: Start isEmpty. Operand 66523 states and 279309 transitions. [2022-03-03 19:55:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:37,861 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:37,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:37,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:38,061 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,SelfDestructingSolverStorable75 [2022-03-03 19:55:38,061 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:38,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:38,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1778485043, now seen corresponding path program 68 times [2022-03-03 19:55:38,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:38,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244561567] [2022-03-03 19:55:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:38,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:38,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:38,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244561567] [2022-03-03 19:55:38,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244561567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:38,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969432358] [2022-03-03 19:55:38,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:55:38,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:38,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:38,230 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 19:55:38,231 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 19:55:38,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:55:38,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:38,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:55:38,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:38,578 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:55:38,578 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 47 treesize of output 29 [2022-03-03 19:55:38,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:38,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:38,666 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 37 treesize of output 17 [2022-03-03 19:55:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:38,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:38,863 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:38,863 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 77 [2022-03-03 19:55:39,043 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:39,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-03-03 19:55:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:39,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969432358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:39,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:39,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 19:55:39,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757800768] [2022-03-03 19:55:39,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:39,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:55:39,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:39,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:55:39,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:55:39,120 INFO L87 Difference]: Start difference. First operand 66523 states and 279309 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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 19:55:40,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:40,306 INFO L93 Difference]: Finished difference Result 85839 states and 360917 transitions. [2022-03-03 19:55:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:55:40,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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 39 [2022-03-03 19:55:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:40,717 INFO L225 Difference]: With dead ends: 85839 [2022-03-03 19:55:40,717 INFO L226 Difference]: Without dead ends: 85784 [2022-03-03 19:55:40,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:55:40,718 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 174 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:40,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 482 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 347 Invalid, 0 Unknown, 177 Unchecked, 0.2s Time] [2022-03-03 19:55:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85784 states. [2022-03-03 19:55:42,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85784 to 67600. [2022-03-03 19:55:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67600 states, 67599 states have (on average 4.199396440775751) internal successors, (283875), 67599 states have internal predecessors, (283875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67600 states to 67600 states and 283875 transitions. [2022-03-03 19:55:43,105 INFO L78 Accepts]: Start accepts. Automaton has 67600 states and 283875 transitions. Word has length 39 [2022-03-03 19:55:43,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:43,106 INFO L470 AbstractCegarLoop]: Abstraction has 67600 states and 283875 transitions. [2022-03-03 19:55:43,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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 19:55:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 67600 states and 283875 transitions. [2022-03-03 19:55:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:43,271 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:43,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:43,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:43,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:43,493 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:43,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1083161669, now seen corresponding path program 69 times [2022-03-03 19:55:43,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:43,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208617220] [2022-03-03 19:55:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:43,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:43,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:43,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208617220] [2022-03-03 19:55:43,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208617220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:43,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704000789] [2022-03-03 19:55:43,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:55:43,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:43,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:43,667 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 19:55:43,669 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 19:55:44,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:55:44,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:44,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:55:44,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:44,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:44,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:44,474 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 46 treesize of output 46 [2022-03-03 19:55:44,650 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:55:44,651 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 44 treesize of output 40 [2022-03-03 19:55:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:44,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:46,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:46,762 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:55:46,763 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 53 [2022-03-03 19:55:47,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:47,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:47,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:47,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:47,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 42 [2022-03-03 19:55:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:47,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704000789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:47,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:47,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-03-03 19:55:47,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504866027] [2022-03-03 19:55:47,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:47,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:55:47,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:47,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:55:47,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:55:47,230 INFO L87 Difference]: Start difference. First operand 67600 states and 283875 transitions. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:49,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:49,041 INFO L93 Difference]: Finished difference Result 80420 states and 335614 transitions. [2022-03-03 19:55:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:55:49,041 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:55:49,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:49,339 INFO L225 Difference]: With dead ends: 80420 [2022-03-03 19:55:49,340 INFO L226 Difference]: Without dead ends: 80413 [2022-03-03 19:55:49,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:55:49,340 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 469 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:49,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 1394 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 535 Invalid, 0 Unknown, 472 Unchecked, 0.2s Time] [2022-03-03 19:55:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80413 states. [2022-03-03 19:55:51,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80413 to 68397. [2022-03-03 19:55:51,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68397 states, 68396 states have (on average 4.197189894145857) internal successors, (287071), 68396 states have internal predecessors, (287071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68397 states to 68397 states and 287071 transitions. [2022-03-03 19:55:51,941 INFO L78 Accepts]: Start accepts. Automaton has 68397 states and 287071 transitions. Word has length 39 [2022-03-03 19:55:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:51,941 INFO L470 AbstractCegarLoop]: Abstraction has 68397 states and 287071 transitions. [2022-03-03 19:55:51,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:51,941 INFO L276 IsEmpty]: Start isEmpty. Operand 68397 states and 287071 transitions. [2022-03-03 19:55:52,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:52,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:52,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:52,161 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 19:55:52,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:52,346 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:52,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:52,346 INFO L85 PathProgramCache]: Analyzing trace with hash -421743671, now seen corresponding path program 70 times [2022-03-03 19:55:52,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:52,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143408580] [2022-03-03 19:55:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:52,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:52,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:52,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143408580] [2022-03-03 19:55:52,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143408580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:52,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341646997] [2022-03-03 19:55:52,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:55:52,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:52,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:52,496 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 19:55:52,496 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 19:55:52,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:55:52,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:52,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:55:52,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:52,895 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:55:52,895 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 61 treesize of output 43 [2022-03-03 19:55:52,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:52,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:52,956 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 37 treesize of output 17 [2022-03-03 19:55:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:52,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:53,150 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:53,150 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 77 [2022-03-03 19:55:53,335 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:53,335 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 47 treesize of output 61 [2022-03-03 19:55:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:53,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341646997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:53,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:53,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 19:55:53,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107200245] [2022-03-03 19:55:53,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:53,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:55:53,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:53,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:55:53,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:55:53,412 INFO L87 Difference]: Start difference. First operand 68397 states and 287071 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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 19:55:54,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:54,708 INFO L93 Difference]: Finished difference Result 96032 states and 402939 transitions. [2022-03-03 19:55:54,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:55:54,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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 39 [2022-03-03 19:55:54,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:55,467 INFO L225 Difference]: With dead ends: 96032 [2022-03-03 19:55:55,467 INFO L226 Difference]: Without dead ends: 95977 [2022-03-03 19:55:55,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:55:55,468 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 176 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:55,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 596 Invalid, 597 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [9 Valid, 471 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2022-03-03 19:55:55,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95977 states. [2022-03-03 19:55:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95977 to 68665. [2022-03-03 19:55:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68665 states, 68664 states have (on average 4.197993125946638) internal successors, (288251), 68664 states have internal predecessors, (288251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68665 states to 68665 states and 288251 transitions. [2022-03-03 19:55:57,850 INFO L78 Accepts]: Start accepts. Automaton has 68665 states and 288251 transitions. Word has length 39 [2022-03-03 19:55:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:57,850 INFO L470 AbstractCegarLoop]: Abstraction has 68665 states and 288251 transitions. [2022-03-03 19:55:57,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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 19:55:57,850 INFO L276 IsEmpty]: Start isEmpty. Operand 68665 states and 288251 transitions. [2022-03-03 19:55:58,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:58,041 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:58,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:58,057 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 19:55:58,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-03 19:55:58,242 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:58,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:58,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1855064255, now seen corresponding path program 71 times [2022-03-03 19:55:58,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:58,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167022077] [2022-03-03 19:55:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:58,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:58,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:58,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167022077] [2022-03-03 19:55:58,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167022077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:58,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387970969] [2022-03-03 19:55:58,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:55:58,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:58,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:58,383 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 19:55:58,384 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 19:55:58,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:55:58,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:58,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:55:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:58,867 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:55:58,868 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 50 treesize of output 50 [2022-03-03 19:55:59,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:59,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:59,647 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 17 [2022-03-03 19:55:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:59,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:00,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:00,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:00,774 INFO L353 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-03-03 19:56:00,774 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 49 treesize of output 61 [2022-03-03 19:56:01,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:01,466 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:56:01,466 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-03-03 19:56:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:01,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387970969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:01,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:01,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-03-03 19:56:01,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629493294] [2022-03-03 19:56:01,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:01,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:56:01,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:01,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:56:01,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:56:01,531 INFO L87 Difference]: Start difference. First operand 68665 states and 288251 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:03,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:03,289 INFO L93 Difference]: Finished difference Result 96066 states and 398976 transitions. [2022-03-03 19:56:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:56:03,289 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:56:03,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:03,708 INFO L225 Difference]: With dead ends: 96066 [2022-03-03 19:56:03,708 INFO L226 Difference]: Without dead ends: 96053 [2022-03-03 19:56:03,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=432, Invalid=2018, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:56:03,709 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 498 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1428 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:03,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 1341 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 339 Invalid, 0 Unknown, 1428 Unchecked, 0.2s Time] [2022-03-03 19:56:03,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96053 states. [2022-03-03 19:56:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96053 to 72023. [2022-03-03 19:56:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72023 states, 72022 states have (on average 4.203493377023687) internal successors, (302744), 72022 states have internal predecessors, (302744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:06,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72023 states to 72023 states and 302744 transitions. [2022-03-03 19:56:06,552 INFO L78 Accepts]: Start accepts. Automaton has 72023 states and 302744 transitions. Word has length 39 [2022-03-03 19:56:06,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:06,553 INFO L470 AbstractCegarLoop]: Abstraction has 72023 states and 302744 transitions. [2022-03-03 19:56:06,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:06,553 INFO L276 IsEmpty]: Start isEmpty. Operand 72023 states and 302744 transitions. [2022-03-03 19:56:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:56:06,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:06,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:06,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:06,949 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,SelfDestructingSolverStorable79 [2022-03-03 19:56:06,949 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:56:06,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:06,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1067608453, now seen corresponding path program 72 times [2022-03-03 19:56:06,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:06,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655771831] [2022-03-03 19:56:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:06,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:07,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:07,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655771831] [2022-03-03 19:56:07,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655771831] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:07,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682436498] [2022-03-03 19:56:07,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:56:07,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:07,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:07,115 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 19:56:07,116 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 19:56:07,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:56:07,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:07,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-03 19:56:07,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:07,629 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:56:07,629 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 47 treesize of output 29 [2022-03-03 19:56:07,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:07,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:07,665 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 28 treesize of output 14 [2022-03-03 19:56:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:07,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:08,433 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:08,434 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 55 treesize of output 73 [2022-03-03 19:56:08,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:08,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:08,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:08,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:08,825 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 44 treesize of output 52 [2022-03-03 19:56:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:08,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682436498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:08,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:08,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:56:08,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718917091] [2022-03-03 19:56:08,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:08,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:56:08,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:08,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:56:08,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:56:08,937 INFO L87 Difference]: Start difference. First operand 72023 states and 302744 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:10,978 INFO L93 Difference]: Finished difference Result 114310 states and 476438 transitions. [2022-03-03 19:56:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:56:10,979 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:56:10,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:11,571 INFO L225 Difference]: With dead ends: 114310 [2022-03-03 19:56:11,571 INFO L226 Difference]: Without dead ends: 114255 [2022-03-03 19:56:11,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=295, Invalid=1775, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:56:11,571 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 625 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1015 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:11,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 1200 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 685 Invalid, 0 Unknown, 1015 Unchecked, 0.5s Time] [2022-03-03 19:56:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114255 states. [2022-03-03 19:56:14,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114255 to 82307. [2022-03-03 19:56:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82307 states, 82306 states have (on average 4.227358880276043) internal successors, (347937), 82306 states have internal predecessors, (347937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82307 states to 82307 states and 347937 transitions. [2022-03-03 19:56:15,203 INFO L78 Accepts]: Start accepts. Automaton has 82307 states and 347937 transitions. Word has length 39 [2022-03-03 19:56:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:15,203 INFO L470 AbstractCegarLoop]: Abstraction has 82307 states and 347937 transitions. [2022-03-03 19:56:15,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 82307 states and 347937 transitions. [2022-03-03 19:56:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:56:15,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:15,444 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:15,459 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 19:56:15,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:15,644 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:56:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash 234109921, now seen corresponding path program 73 times [2022-03-03 19:56:15,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:15,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683008959] [2022-03-03 19:56:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:15,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:15,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:15,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683008959] [2022-03-03 19:56:15,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683008959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:15,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006588866] [2022-03-03 19:56:15,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:56:15,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:15,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:15,813 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 19:56:15,814 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 19:56:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:15,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:56:15,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:16,354 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:56:16,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 43 [2022-03-03 19:56:16,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:16,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:16,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:16,415 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 37 treesize of output 17 [2022-03-03 19:56:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:16,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:16,598 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:16,599 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 77 [2022-03-03 19:56:16,787 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:16,788 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 47 treesize of output 61 [2022-03-03 19:56:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:16,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006588866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:16,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:16,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 19:56:16,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107082716] [2022-03-03 19:56:16,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:16,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:56:16,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:16,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:56:16,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:56:16,860 INFO L87 Difference]: Start difference. First operand 82307 states and 347937 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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 19:56:18,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:18,219 INFO L93 Difference]: Finished difference Result 113471 states and 479211 transitions. [2022-03-03 19:56:18,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:56:18,220 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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 39 [2022-03-03 19:56:18,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:18,766 INFO L225 Difference]: With dead ends: 113471 [2022-03-03 19:56:18,766 INFO L226 Difference]: Without dead ends: 113464 [2022-03-03 19:56:18,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:56:18,766 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 177 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:18,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 616 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 392 Invalid, 0 Unknown, 405 Unchecked, 0.4s Time] [2022-03-03 19:56:18,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113464 states. [2022-03-03 19:56:21,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113464 to 82645. [2022-03-03 19:56:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82645 states, 82644 states have (on average 4.226066018101737) internal successors, (349259), 82644 states have internal predecessors, (349259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82645 states to 82645 states and 349259 transitions. [2022-03-03 19:56:21,879 INFO L78 Accepts]: Start accepts. Automaton has 82645 states and 349259 transitions. Word has length 39 [2022-03-03 19:56:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:21,879 INFO L470 AbstractCegarLoop]: Abstraction has 82645 states and 349259 transitions. [2022-03-03 19:56:21,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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 19:56:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 82645 states and 349259 transitions. [2022-03-03 19:56:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:56:22,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:22,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:22,570 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 19:56:22,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:22,754 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:56:22,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:22,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1634155451, now seen corresponding path program 74 times [2022-03-03 19:56:22,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:22,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942033804] [2022-03-03 19:56:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:22,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:22,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:22,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942033804] [2022-03-03 19:56:22,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942033804] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:22,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631902344] [2022-03-03 19:56:22,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:56:22,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:22,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:22,920 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 19:56:22,920 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 19:56:22,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:56:22,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:22,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:56:22,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:23,329 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:56:23,330 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 51 treesize of output 55 [2022-03-03 19:56:23,385 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:56:23,386 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 48 treesize of output 24 [2022-03-03 19:56:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:23,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:24,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:24,305 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:56:24,305 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 57 [2022-03-03 19:56:24,673 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:24,673 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 48 treesize of output 62 [2022-03-03 19:56:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:24,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631902344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:24,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:24,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-03 19:56:24,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123577094] [2022-03-03 19:56:24,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:24,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:56:24,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:24,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:56:24,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:56:24,737 INFO L87 Difference]: Start difference. First operand 82645 states and 349259 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:27,122 INFO L93 Difference]: Finished difference Result 146170 states and 616686 transitions. [2022-03-03 19:56:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:56:27,123 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:56:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:27,895 INFO L225 Difference]: With dead ends: 146170 [2022-03-03 19:56:27,895 INFO L226 Difference]: Without dead ends: 146060 [2022-03-03 19:56:27,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:56:27,895 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 495 mSDsluCounter, 1684 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 1837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 742 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:27,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 1245 Invalid, 1837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1051 Invalid, 0 Unknown, 742 Unchecked, 0.5s Time] [2022-03-03 19:56:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146060 states. [2022-03-03 19:56:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146060 to 76870. [2022-03-03 19:56:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76870 states, 76869 states have (on average 4.228414575446539) internal successors, (325034), 76869 states have internal predecessors, (325034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76870 states to 76870 states and 325034 transitions. [2022-03-03 19:56:31,717 INFO L78 Accepts]: Start accepts. Automaton has 76870 states and 325034 transitions. Word has length 39 [2022-03-03 19:56:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:31,717 INFO L470 AbstractCegarLoop]: Abstraction has 76870 states and 325034 transitions. [2022-03-03 19:56:31,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:31,717 INFO L276 IsEmpty]: Start isEmpty. Operand 76870 states and 325034 transitions. [2022-03-03 19:56:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:56:31,936 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:31,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:31,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:32,136 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,SelfDestructingSolverStorable82 [2022-03-03 19:56:32,136 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:56:32,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:32,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1392633403, now seen corresponding path program 75 times [2022-03-03 19:56:32,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:32,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556468716] [2022-03-03 19:56:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:32,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:32,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:32,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556468716] [2022-03-03 19:56:32,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556468716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:32,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944608699] [2022-03-03 19:56:32,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:56:32,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:32,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:32,312 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 19:56:32,313 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 19:56:32,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:56:32,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:32,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 19:56:32,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:32,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:32,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:32,901 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 56 treesize of output 56 [2022-03-03 19:56:33,018 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:56:33,019 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 38 treesize of output 14 [2022-03-03 19:56:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:33,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:33,732 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:33,732 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 55 treesize of output 73 [2022-03-03 19:56:34,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:34,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:34,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:34,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:34,123 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 43 treesize of output 41 [2022-03-03 19:56:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:34,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944608699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:34,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:34,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-03-03 19:56:34,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087109332] [2022-03-03 19:56:34,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:34,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:56:34,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:34,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:56:34,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:56:34,219 INFO L87 Difference]: Start difference. First operand 76870 states and 325034 transitions. Second operand has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:35,607 INFO L93 Difference]: Finished difference Result 102332 states and 429727 transitions. [2022-03-03 19:56:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:56:35,607 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:56:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:36,480 INFO L225 Difference]: With dead ends: 102332 [2022-03-03 19:56:36,480 INFO L226 Difference]: Without dead ends: 102313 [2022-03-03 19:56:36,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:56:36,480 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 324 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 544 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:36,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 1086 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 464 Invalid, 0 Unknown, 544 Unchecked, 0.2s Time] [2022-03-03 19:56:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102313 states. [2022-03-03 19:56:38,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102313 to 78635. [2022-03-03 19:56:38,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78635 states, 78634 states have (on average 4.228107434443117) internal successors, (332473), 78634 states have internal predecessors, (332473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:39,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78635 states to 78635 states and 332473 transitions. [2022-03-03 19:56:39,481 INFO L78 Accepts]: Start accepts. Automaton has 78635 states and 332473 transitions. Word has length 39 [2022-03-03 19:56:39,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:39,482 INFO L470 AbstractCegarLoop]: Abstraction has 78635 states and 332473 transitions. [2022-03-03 19:56:39,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:39,482 INFO L276 IsEmpty]: Start isEmpty. Operand 78635 states and 332473 transitions. [2022-03-03 19:56:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:56:39,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:39,724 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:39,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:39,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:39,925 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:56:39,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:39,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1894624993, now seen corresponding path program 76 times [2022-03-03 19:56:39,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:39,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927052292] [2022-03-03 19:56:39,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:39,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:40,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:40,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927052292] [2022-03-03 19:56:40,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927052292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:40,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550411478] [2022-03-03 19:56:40,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:56:40,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:40,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:40,100 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 19:56:40,101 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 19:56:40,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:56:40,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:40,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:56:40,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:40,611 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:56:40,611 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 61 treesize of output 43 [2022-03-03 19:56:40,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:40,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:40,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:40,672 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 37 treesize of output 17 [2022-03-03 19:56:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:40,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:40,857 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:40,858 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 77 [2022-03-03 19:56:41,050 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:41,050 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 47 treesize of output 61 [2022-03-03 19:56:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:41,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550411478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:41,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:41,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 19:56:41,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656639774] [2022-03-03 19:56:41,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:41,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:56:41,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:41,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:56:41,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:56:41,123 INFO L87 Difference]: Start difference. First operand 78635 states and 332473 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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 19:56:42,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:42,664 INFO L93 Difference]: Finished difference Result 126534 states and 535227 transitions. [2022-03-03 19:56:42,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:56:42,664 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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 39 [2022-03-03 19:56:42,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:43,290 INFO L225 Difference]: With dead ends: 126534 [2022-03-03 19:56:43,290 INFO L226 Difference]: Without dead ends: 126527 [2022-03-03 19:56:43,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:56:43,291 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 183 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:43,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 719 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 475 Invalid, 0 Unknown, 288 Unchecked, 0.2s Time] [2022-03-03 19:56:43,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126527 states. [2022-03-03 19:56:45,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126527 to 84909. [2022-03-03 19:56:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84909 states, 84908 states have (on average 4.2318391670985065) internal successors, (359317), 84908 states have internal predecessors, (359317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84909 states to 84909 states and 359317 transitions. [2022-03-03 19:56:46,872 INFO L78 Accepts]: Start accepts. Automaton has 84909 states and 359317 transitions. Word has length 39 [2022-03-03 19:56:46,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:46,872 INFO L470 AbstractCegarLoop]: Abstraction has 84909 states and 359317 transitions. [2022-03-03 19:56:46,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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 19:56:46,872 INFO L276 IsEmpty]: Start isEmpty. Operand 84909 states and 359317 transitions. [2022-03-03 19:56:47,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:56:47,108 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:47,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:47,124 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 19:56:47,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:47,308 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:56:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:47,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1359791373, now seen corresponding path program 77 times [2022-03-03 19:56:47,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:47,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711527362] [2022-03-03 19:56:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:47,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:47,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:47,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711527362] [2022-03-03 19:56:47,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711527362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:47,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469367093] [2022-03-03 19:56:47,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:56:47,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:47,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:47,448 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 19:56:47,449 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 19:56:47,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:56:47,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:47,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 19:56:47,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:47,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:47,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:47,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:47,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:47,788 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 70 treesize of output 74 [2022-03-03 19:56:47,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:47,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:47,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:47,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:47,911 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 55 treesize of output 59 [2022-03-03 19:56:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:48,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:49,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:49,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:49,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:49,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:49,301 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 59 treesize of output 41 [2022-03-03 19:56:49,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:49,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:49,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:49,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:49,585 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 45 treesize of output 17 [2022-03-03 19:56:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:49,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469367093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:49,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:49,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-03-03 19:56:49,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904550841] [2022-03-03 19:56:49,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:49,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:56:49,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:49,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:56:49,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:56:49,599 INFO L87 Difference]: Start difference. First operand 84909 states and 359317 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:54,248 INFO L93 Difference]: Finished difference Result 198242 states and 829651 transitions. [2022-03-03 19:56:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 19:56:54,248 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:56:54,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:55,663 INFO L225 Difference]: With dead ends: 198242 [2022-03-03 19:56:55,664 INFO L226 Difference]: Without dead ends: 198082 [2022-03-03 19:56:55,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 77 SyntacticMatches, 13 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=782, Invalid=4188, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 19:56:55,664 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 838 mSDsluCounter, 2943 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 2113 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 765 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:55,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 2113 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1697 Invalid, 0 Unknown, 765 Unchecked, 1.0s Time] [2022-03-03 19:56:55,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198082 states. [2022-03-03 19:57:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198082 to 121726. [2022-03-03 19:57:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121726 states, 121725 states have (on average 4.289669336619429) internal successors, (522160), 121725 states have internal predecessors, (522160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121726 states to 121726 states and 522160 transitions. [2022-03-03 19:57:01,682 INFO L78 Accepts]: Start accepts. Automaton has 121726 states and 522160 transitions. Word has length 39 [2022-03-03 19:57:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:01,682 INFO L470 AbstractCegarLoop]: Abstraction has 121726 states and 522160 transitions. [2022-03-03 19:57:01,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:01,682 INFO L276 IsEmpty]: Start isEmpty. Operand 121726 states and 522160 transitions. [2022-03-03 19:57:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:57:02,065 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:02,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:02,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:02,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:02,266 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:57:02,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:02,266 INFO L85 PathProgramCache]: Analyzing trace with hash -958641139, now seen corresponding path program 78 times [2022-03-03 19:57:02,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:02,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751821332] [2022-03-03 19:57:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:02,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:02,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:02,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751821332] [2022-03-03 19:57:02,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751821332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:02,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951740440] [2022-03-03 19:57:02,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:57:02,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:02,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:02,424 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 19:57:02,425 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 19:57:02,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:57:02,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:02,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:57:02,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:03,117 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:57:03,117 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 56 treesize of output 56 [2022-03-03 19:57:03,188 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:57:03,188 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 45 treesize of output 27 [2022-03-03 19:57:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:03,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:03,686 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:03,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 73 [2022-03-03 19:57:04,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:04,302 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:57:04,302 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-03-03 19:57:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:04,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951740440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:04,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:04,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-03-03 19:57:04,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216348835] [2022-03-03 19:57:04,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:04,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:57:04,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:04,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:57:04,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:57:04,341 INFO L87 Difference]: Start difference. First operand 121726 states and 522160 transitions. Second operand has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:08,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:08,182 INFO L93 Difference]: Finished difference Result 215833 states and 923727 transitions. [2022-03-03 19:57:08,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 19:57:08,183 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:57:08,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:09,806 INFO L225 Difference]: With dead ends: 215833 [2022-03-03 19:57:09,806 INFO L226 Difference]: Without dead ends: 215723 [2022-03-03 19:57:09,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=390, Invalid=2472, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:57:09,807 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 508 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 786 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:09,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 1724 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1237 Invalid, 0 Unknown, 786 Unchecked, 0.6s Time] [2022-03-03 19:57:10,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215723 states. [2022-03-03 19:57:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215723 to 128651. [2022-03-03 19:57:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128651 states, 128650 states have (on average 4.291371939370385) internal successors, (552085), 128650 states have internal predecessors, (552085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128651 states to 128651 states and 552085 transitions. [2022-03-03 19:57:17,537 INFO L78 Accepts]: Start accepts. Automaton has 128651 states and 552085 transitions. Word has length 39 [2022-03-03 19:57:17,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:17,537 INFO L470 AbstractCegarLoop]: Abstraction has 128651 states and 552085 transitions. [2022-03-03 19:57:17,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:17,537 INFO L276 IsEmpty]: Start isEmpty. Operand 128651 states and 552085 transitions. [2022-03-03 19:57:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:57:18,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:18,615 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:18,675 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 19:57:18,816 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,SelfDestructingSolverStorable86 [2022-03-03 19:57:18,816 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:57:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1227387567, now seen corresponding path program 79 times [2022-03-03 19:57:18,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:18,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115305834] [2022-03-03 19:57:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:18,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:19,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:19,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115305834] [2022-03-03 19:57:19,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115305834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:19,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091407769] [2022-03-03 19:57:19,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:57:19,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:19,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:19,107 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 19:57:19,163 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 19:57:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:19,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:57:19,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:19,646 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:57:19,647 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 61 treesize of output 43 [2022-03-03 19:57:19,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:19,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:19,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:19,686 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 37 treesize of output 17 [2022-03-03 19:57:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:19,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:19,934 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:19,935 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 77 [2022-03-03 19:57:20,158 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:20,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-03-03 19:57:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:20,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091407769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:20,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:20,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 19:57:20,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687490059] [2022-03-03 19:57:20,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:20,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:57:20,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:57:20,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:57:20,250 INFO L87 Difference]: Start difference. First operand 128651 states and 552085 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 19:57:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:22,014 INFO L93 Difference]: Finished difference Result 159957 states and 684255 transitions. [2022-03-03 19:57:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:57:22,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 39 [2022-03-03 19:57:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:23,192 INFO L225 Difference]: With dead ends: 159957 [2022-03-03 19:57:23,192 INFO L226 Difference]: Without dead ends: 159902 [2022-03-03 19:57:23,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:57:23,193 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 165 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 479 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:23,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 748 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 456 Invalid, 0 Unknown, 479 Unchecked, 0.2s Time] [2022-03-03 19:57:23,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159902 states. [2022-03-03 19:57:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159902 to 129197. [2022-03-03 19:57:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129197 states, 129196 states have (on average 4.29087587851017) internal successors, (554364), 129196 states have internal predecessors, (554364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129197 states to 129197 states and 554364 transitions. [2022-03-03 19:57:28,239 INFO L78 Accepts]: Start accepts. Automaton has 129197 states and 554364 transitions. Word has length 39 [2022-03-03 19:57:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:28,239 INFO L470 AbstractCegarLoop]: Abstraction has 129197 states and 554364 transitions. [2022-03-03 19:57:28,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 19:57:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 129197 states and 554364 transitions. [2022-03-03 19:57:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:57:28,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:28,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:28,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:29,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-03 19:57:29,149 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:57:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:29,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1251937383, now seen corresponding path program 80 times [2022-03-03 19:57:29,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:29,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040360453] [2022-03-03 19:57:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:29,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:29,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:29,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040360453] [2022-03-03 19:57:29,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040360453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:29,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588758897] [2022-03-03 19:57:29,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:57:29,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:29,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:29,319 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 19:57:29,320 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 19:57:29,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:57:29,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:29,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:57:29,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:29,759 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:57:29,759 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 61 treesize of output 43 [2022-03-03 19:57:29,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:29,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:29,830 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 17 [2022-03-03 19:57:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:29,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:30,021 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:30,021 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 77 [2022-03-03 19:57:30,196 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:30,196 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 47 treesize of output 61 [2022-03-03 19:57:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:30,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588758897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:30,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:30,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 19:57:30,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114889238] [2022-03-03 19:57:30,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:30,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:57:30,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:30,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:57:30,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:57:30,284 INFO L87 Difference]: Start difference. First operand 129197 states and 554364 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 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 19:57:32,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:32,147 INFO L93 Difference]: Finished difference Result 169687 states and 728226 transitions. [2022-03-03 19:57:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:57:32,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 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 39 [2022-03-03 19:57:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:33,413 INFO L225 Difference]: With dead ends: 169687 [2022-03-03 19:57:33,414 INFO L226 Difference]: Without dead ends: 169680 [2022-03-03 19:57:33,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:57:33,414 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 147 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 383 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:33,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 898 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 592 Invalid, 0 Unknown, 383 Unchecked, 0.2s Time] [2022-03-03 19:57:33,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169680 states. [2022-03-03 19:57:37,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169680 to 129935. [2022-03-03 19:57:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129935 states, 129934 states have (on average 4.291394092385365) internal successors, (557598), 129934 states have internal predecessors, (557598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129935 states to 129935 states and 557598 transitions. [2022-03-03 19:57:38,657 INFO L78 Accepts]: Start accepts. Automaton has 129935 states and 557598 transitions. Word has length 39 [2022-03-03 19:57:38,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:38,658 INFO L470 AbstractCegarLoop]: Abstraction has 129935 states and 557598 transitions. [2022-03-03 19:57:38,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 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 19:57:38,658 INFO L276 IsEmpty]: Start isEmpty. Operand 129935 states and 557598 transitions. [2022-03-03 19:57:39,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:57:39,423 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:39,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:39,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:39,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-03 19:57:39,639 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:57:39,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:39,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1445823799, now seen corresponding path program 81 times [2022-03-03 19:57:39,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:39,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955420901] [2022-03-03 19:57:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:39,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:39,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:39,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955420901] [2022-03-03 19:57:39,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955420901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:39,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148511086] [2022-03-03 19:57:39,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:57:39,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:39,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:39,792 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 19:57:39,793 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 19:57:39,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:57:39,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:39,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:57:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:40,155 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:57:40,156 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 51 treesize of output 55 [2022-03-03 19:57:40,210 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:57:40,210 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 48 treesize of output 24 [2022-03-03 19:57:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:40,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:41,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:41,070 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:57:41,070 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 57 [2022-03-03 19:57:41,234 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:41,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 62 [2022-03-03 19:57:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:41,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148511086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:41,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:41,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-03 19:57:41,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314368403] [2022-03-03 19:57:41,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:41,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:57:41,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:41,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:57:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:57:41,315 INFO L87 Difference]: Start difference. First operand 129935 states and 557598 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:44,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:44,148 INFO L93 Difference]: Finished difference Result 186394 states and 796321 transitions. [2022-03-03 19:57:44,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:57:44,148 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:57:44,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:45,580 INFO L225 Difference]: With dead ends: 186394 [2022-03-03 19:57:45,580 INFO L226 Difference]: Without dead ends: 186339 [2022-03-03 19:57:45,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:57:45,580 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 400 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 778 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:45,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 1530 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1104 Invalid, 0 Unknown, 778 Unchecked, 0.5s Time] [2022-03-03 19:57:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186339 states. [2022-03-03 19:57:49,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186339 to 130308. [2022-03-03 19:57:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130308 states, 130307 states have (on average 4.290176276025079) internal successors, (559040), 130307 states have internal predecessors, (559040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130308 states to 130308 states and 559040 transitions. [2022-03-03 19:57:51,692 INFO L78 Accepts]: Start accepts. Automaton has 130308 states and 559040 transitions. Word has length 39 [2022-03-03 19:57:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:51,692 INFO L470 AbstractCegarLoop]: Abstraction has 130308 states and 559040 transitions. [2022-03-03 19:57:51,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 130308 states and 559040 transitions. [2022-03-03 19:57:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:57:52,133 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:52,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:52,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:52,333 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,SelfDestructingSolverStorable89 [2022-03-03 19:57:52,333 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:57:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1517581753, now seen corresponding path program 82 times [2022-03-03 19:57:52,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:52,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397914916] [2022-03-03 19:57:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:52,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:52,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:52,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397914916] [2022-03-03 19:57:52,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397914916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:52,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443215086] [2022-03-03 19:57:52,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:57:52,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:52,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:52,476 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 19:57:52,477 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 19:57:52,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:57:52,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:52,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:57:52,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:52,946 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:57:52,947 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 61 treesize of output 43 [2022-03-03 19:57:52,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:52,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:52,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:52,978 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 37 treesize of output 17 [2022-03-03 19:57:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:53,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:53,169 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:53,169 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 77 [2022-03-03 19:57:53,582 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:53,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 61 [2022-03-03 19:57:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:53,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443215086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:53,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:53,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 19:57:53,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976608876] [2022-03-03 19:57:53,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:53,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:57:53,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:53,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:57:53,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:57:53,662 INFO L87 Difference]: Start difference. First operand 130308 states and 559040 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 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)