/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-series-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:21:31,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:21:31,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:21:31,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 18:21:31,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 18:21:31,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 18:21:31,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 18:21:31,378 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 [2022-03-01 18:21:31,391 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:21:31,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:21:31,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:21:31,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:21:31,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:21:31,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:21:31,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:21:31,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:21:31,393 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:21:31,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:21:31,393 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:21:31,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:21:31,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:21:31,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:21:31,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:21:31,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:21:31,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:21:31,394 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:21:31,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:21:31,394 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:21:31,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:21:31,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:21:31,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:21:31,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:21:31,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:21:31,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:21:31,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:21:31,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:21:31,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:21:31,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:21:31,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:21:31,396 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:21:31,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:21:31,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:21:31,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:21:31,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:21:31,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:21:31,606 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:21:31,607 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:21:31,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl [2022-03-01 18:21:31,608 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl' [2022-03-01 18:21:31,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:21:31,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:21:31,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:21:31,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:21:31,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:21:31,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:21:31" (1/1) ... [2022-03-01 18:21:31,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:21:31" (1/1) ... [2022-03-01 18:21:31,654 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:21:31,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:21:31,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:21:31,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:21:31,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:21:31,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:21:31" (1/1) ... [2022-03-01 18:21:31,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:21:31" (1/1) ... [2022-03-01 18:21:31,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:21:31" (1/1) ... [2022-03-01 18:21:31,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:21:31" (1/1) ... [2022-03-01 18:21:31,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:21:31" (1/1) ... [2022-03-01 18:21:31,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:21:31" (1/1) ... [2022-03-01 18:21:31,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:21:31" (1/1) ... [2022-03-01 18:21:31,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:21:31,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:21:31,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:21:31,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:21:31,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:21:31" (1/1) ... [2022-03-01 18:21:31,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:21:31,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:31,701 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) [2022-03-01 18:21:31,705 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 [2022-03-01 18:21:31,726 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:21:31,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:21:31,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:21:31,727 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:21:31,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:21:31,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:21:31,727 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:21:31,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:21:31,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:21:31,727 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 18:21:31,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 18:21:31,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 18:21:31,729 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-01 18:21:31,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-01 18:21:31,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-01 18:21:31,730 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 18:21:31,766 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:21:31,767 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:21:31,854 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:21:31,884 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:21:31,884 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:21:31,886 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:21:31 BoogieIcfgContainer [2022-03-01 18:21:31,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:21:31,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:21:31,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:21:31,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:21:31,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:21:31" (1/2) ... [2022-03-01 18:21:31,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5f8f75 and model type buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:21:31, skipping insertion in model container [2022-03-01 18:21:31,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:21:31" (2/2) ... [2022-03-01 18:21:31,891 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series-array.wvr.bpl [2022-03-01 18:21:31,894 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:21:31,894 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:21:31,894 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:21:31,894 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:21:31,946 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-01 18:21:31,982 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:21:31,994 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 [2022-03-01 18:21:31,994 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-01 18:21:32,001 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2022-03-01 18:21:32,084 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) [2022-03-01 18:21:32,089 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) [2022-03-01 18:21:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 18:21:32,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:32,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:32,113 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:32,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:32,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1445873811, now seen corresponding path program 1 times [2022-03-01 18:21:32,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:32,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479772732] [2022-03-01 18:21:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:32,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:32,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:32,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479772732] [2022-03-01 18:21:32,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479772732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:21:32,300 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:21:32,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 18:21:32,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681068315] [2022-03-01 18:21:32,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:21:32,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:21:32,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:32,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:21:32,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:21:32,334 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) [2022-03-01 18:21:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:32,396 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2022-03-01 18:21:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:21:32,400 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 [2022-03-01 18:21:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:32,448 INFO L225 Difference]: With dead ends: 1236 [2022-03-01 18:21:32,449 INFO L226 Difference]: Without dead ends: 1109 [2022-03-01 18:21:32,450 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 [2022-03-01 18:21:32,466 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 [2022-03-01 18:21:32,467 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] [2022-03-01 18:21:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-03-01 18:21:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2022-03-01 18:21:32,543 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) [2022-03-01 18:21:32,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2022-03-01 18:21:32,548 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2022-03-01 18:21:32,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:32,549 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2022-03-01 18:21:32,549 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) [2022-03-01 18:21:32,549 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2022-03-01 18:21:32,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:21:32,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:32,553 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] [2022-03-01 18:21:32,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:21:32,554 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:32,557 INFO L85 PathProgramCache]: Analyzing trace with hash 925045909, now seen corresponding path program 1 times [2022-03-01 18:21:32,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:32,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200359169] [2022-03-01 18:21:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:32,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:32,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:32,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200359169] [2022-03-01 18:21:32,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200359169] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:21:32,614 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:21:32,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:21:32,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445420192] [2022-03-01 18:21:32,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:21:32,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:21:32,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:32,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:21:32,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:21:32,616 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) [2022-03-01 18:21:32,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:32,720 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2022-03-01 18:21:32,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:21:32,720 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 [2022-03-01 18:21:32,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:32,732 INFO L225 Difference]: With dead ends: 1524 [2022-03-01 18:21:32,732 INFO L226 Difference]: Without dead ends: 1418 [2022-03-01 18:21:32,733 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 [2022-03-01 18:21:32,734 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-01 18:21:32,734 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] [2022-03-01 18:21:32,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2022-03-01 18:21:32,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2022-03-01 18:21:32,778 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) [2022-03-01 18:21:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2022-03-01 18:21:32,783 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2022-03-01 18:21:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:32,783 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2022-03-01 18:21:32,783 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) [2022-03-01 18:21:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2022-03-01 18:21:32,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:21:32,786 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:32,786 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] [2022-03-01 18:21:32,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 18:21:32,787 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:32,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1282496465, now seen corresponding path program 1 times [2022-03-01 18:21:32,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:32,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351639656] [2022-03-01 18:21:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:32,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:32,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:32,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351639656] [2022-03-01 18:21:32,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351639656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:21:32,827 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:21:32,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:21:32,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670559701] [2022-03-01 18:21:32,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:21:32,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:21:32,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:32,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:21:32,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:21:32,829 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) [2022-03-01 18:21:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:32,901 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2022-03-01 18:21:32,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:21:32,901 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 [2022-03-01 18:21:32,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:32,911 INFO L225 Difference]: With dead ends: 2017 [2022-03-01 18:21:32,911 INFO L226 Difference]: Without dead ends: 1875 [2022-03-01 18:21:32,912 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 [2022-03-01 18:21:32,913 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:32,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:21:32,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-03-01 18:21:32,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2022-03-01 18:21:32,957 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) [2022-03-01 18:21:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2022-03-01 18:21:32,964 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2022-03-01 18:21:32,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:32,965 INFO L470 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2022-03-01 18:21:32,965 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) [2022-03-01 18:21:32,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2022-03-01 18:21:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:21:32,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:32,971 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] [2022-03-01 18:21:32,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 18:21:32,972 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:32,973 INFO L85 PathProgramCache]: Analyzing trace with hash 770950601, now seen corresponding path program 1 times [2022-03-01 18:21:32,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:32,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216522473] [2022-03-01 18:21:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:32,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:33,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:33,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216522473] [2022-03-01 18:21:33,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216522473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:33,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931472446] [2022-03-01 18:21:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:33,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:33,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:33,025 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) [2022-03-01 18:21:33,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 18:21:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:33,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 18:21:33,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:33,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:33,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931472446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:33,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:33,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-03-01 18:21:33,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593997134] [2022-03-01 18:21:33,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:33,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:21:33,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:33,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:21:33,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:21:33,246 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) [2022-03-01 18:21:33,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:33,389 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2022-03-01 18:21:33,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:21:33,390 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 [2022-03-01 18:21:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:33,400 INFO L225 Difference]: With dead ends: 2308 [2022-03-01 18:21:33,400 INFO L226 Difference]: Without dead ends: 2108 [2022-03-01 18:21:33,400 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 [2022-03-01 18:21:33,403 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 99 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 [2022-03-01 18:21:33,404 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] [2022-03-01 18:21:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2022-03-01 18:21:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2022-03-01 18:21:33,452 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) [2022-03-01 18:21:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2022-03-01 18:21:33,457 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2022-03-01 18:21:33,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:33,457 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2022-03-01 18:21:33,457 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) [2022-03-01 18:21:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2022-03-01 18:21:33,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:21:33,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:33,461 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] [2022-03-01 18:21:33,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-01 18:21:33,677 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 [2022-03-01 18:21:33,677 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:33,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:33,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1120776452, now seen corresponding path program 1 times [2022-03-01 18:21:33,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:33,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31080298] [2022-03-01 18:21:33,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:33,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:33,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:33,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31080298] [2022-03-01 18:21:33,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31080298] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:21:33,710 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:21:33,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:21:33,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041149322] [2022-03-01 18:21:33,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:21:33,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:21:33,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:21:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:21:33,712 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) [2022-03-01 18:21:33,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:33,803 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2022-03-01 18:21:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:21:33,804 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 [2022-03-01 18:21:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:33,812 INFO L225 Difference]: With dead ends: 1950 [2022-03-01 18:21:33,812 INFO L226 Difference]: Without dead ends: 1860 [2022-03-01 18:21:33,814 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 [2022-03-01 18:21:33,816 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 64 mSDsluCounter, 31 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 [2022-03-01 18:21:33,817 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] [2022-03-01 18:21:33,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-03-01 18:21:33,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2022-03-01 18:21:33,848 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) [2022-03-01 18:21:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2022-03-01 18:21:33,853 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2022-03-01 18:21:33,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:33,853 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2022-03-01 18:21:33,854 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) [2022-03-01 18:21:33,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2022-03-01 18:21:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:21:33,864 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:33,864 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] [2022-03-01 18:21:33,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-01 18:21:33,864 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:33,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:33,865 INFO L85 PathProgramCache]: Analyzing trace with hash 712551812, now seen corresponding path program 2 times [2022-03-01 18:21:33,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:33,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449214701] [2022-03-01 18:21:33,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:33,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:33,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:33,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449214701] [2022-03-01 18:21:33,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449214701] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:21:33,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:21:33,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:21:33,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56476223] [2022-03-01 18:21:33,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:21:33,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:21:33,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:33,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:21:33,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:21:33,902 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) [2022-03-01 18:21:33,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:33,966 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2022-03-01 18:21:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:21:33,967 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 [2022-03-01 18:21:33,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:33,973 INFO L225 Difference]: With dead ends: 1308 [2022-03-01 18:21:33,973 INFO L226 Difference]: Without dead ends: 1308 [2022-03-01 18:21:33,973 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 [2022-03-01 18:21:33,974 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 41 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:33,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:21:33,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-03-01 18:21:33,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2022-03-01 18:21:33,996 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) [2022-03-01 18:21:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2022-03-01 18:21:33,999 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2022-03-01 18:21:34,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:34,000 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2022-03-01 18:21:34,000 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) [2022-03-01 18:21:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2022-03-01 18:21:34,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:21:34,003 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:34,003 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] [2022-03-01 18:21:34,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-01 18:21:34,003 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:34,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:34,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1043177095, now seen corresponding path program 2 times [2022-03-01 18:21:34,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:34,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447407864] [2022-03-01 18:21:34,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:34,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:34,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:34,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447407864] [2022-03-01 18:21:34,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447407864] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:21:34,050 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:21:34,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:21:34,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209224489] [2022-03-01 18:21:34,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:21:34,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:21:34,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:34,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:21:34,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:21:34,051 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) [2022-03-01 18:21:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:34,105 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2022-03-01 18:21:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:21:34,105 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 [2022-03-01 18:21:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:34,110 INFO L225 Difference]: With dead ends: 1142 [2022-03-01 18:21:34,110 INFO L226 Difference]: Without dead ends: 1120 [2022-03-01 18:21:34,110 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 [2022-03-01 18:21:34,111 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 29 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:34,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:21:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-03-01 18:21:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2022-03-01 18:21:34,129 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) [2022-03-01 18:21:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2022-03-01 18:21:34,133 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2022-03-01 18:21:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:34,133 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2022-03-01 18:21:34,133 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) [2022-03-01 18:21:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2022-03-01 18:21:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:21:34,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:34,136 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] [2022-03-01 18:21:34,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-01 18:21:34,136 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:34,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2066683916, now seen corresponding path program 1 times [2022-03-01 18:21:34,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:34,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128617512] [2022-03-01 18:21:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:34,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:21:34,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:34,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128617512] [2022-03-01 18:21:34,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128617512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:21:34,184 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:21:34,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:21:34,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738952863] [2022-03-01 18:21:34,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:21:34,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:21:34,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:34,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:21:34,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:21:34,186 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) [2022-03-01 18:21:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:34,217 INFO L93 Difference]: Finished difference Result 1334 states and 4929 transitions. [2022-03-01 18:21:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:21:34,218 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 [2022-03-01 18:21:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:34,224 INFO L225 Difference]: With dead ends: 1334 [2022-03-01 18:21:34,224 INFO L226 Difference]: Without dead ends: 1334 [2022-03-01 18:21:34,225 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 [2022-03-01 18:21:34,225 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 [2022-03-01 18:21:34,225 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] [2022-03-01 18:21:34,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2022-03-01 18:21:34,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 954. [2022-03-01 18:21:34,274 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) [2022-03-01 18:21:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3468 transitions. [2022-03-01 18:21:34,279 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3468 transitions. Word has length 27 [2022-03-01 18:21:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:34,281 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 3468 transitions. [2022-03-01 18:21:34,281 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) [2022-03-01 18:21:34,281 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3468 transitions. [2022-03-01 18:21:34,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:21:34,284 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:34,284 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] [2022-03-01 18:21:34,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-01 18:21:34,284 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:34,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:34,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1787495248, now seen corresponding path program 1 times [2022-03-01 18:21:34,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:34,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469194235] [2022-03-01 18:21:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:34,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:34,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:34,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469194235] [2022-03-01 18:21:34,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469194235] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:34,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074677010] [2022-03-01 18:21:34,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:34,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:34,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:34,327 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) [2022-03-01 18:21:34,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 18:21:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:34,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-01 18:21:34,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:34,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-01 18:21:34,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074677010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:21:34,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-01 18:21:34,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-03-01 18:21:34,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895228293] [2022-03-01 18:21:34,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:21:34,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:21:34,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:34,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:21:34,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:21:34,403 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) [2022-03-01 18:21:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:34,432 INFO L93 Difference]: Finished difference Result 1658 states and 5999 transitions. [2022-03-01 18:21:34,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:21:34,432 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 [2022-03-01 18:21:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:34,450 INFO L225 Difference]: With dead ends: 1658 [2022-03-01 18:21:34,450 INFO L226 Difference]: Without dead ends: 1658 [2022-03-01 18:21:34,451 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 [2022-03-01 18:21:34,452 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 [2022-03-01 18:21:34,452 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] [2022-03-01 18:21:34,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2022-03-01 18:21:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1112. [2022-03-01 18:21:34,474 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) [2022-03-01 18:21:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4075 transitions. [2022-03-01 18:21:34,477 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4075 transitions. Word has length 27 [2022-03-01 18:21:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:34,477 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 4075 transitions. [2022-03-01 18:21:34,478 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) [2022-03-01 18:21:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4075 transitions. [2022-03-01 18:21:34,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:21:34,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:34,480 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] [2022-03-01 18:21:34,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:34,696 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 [2022-03-01 18:21:34,697 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:34,697 INFO L85 PathProgramCache]: Analyzing trace with hash -383422002, now seen corresponding path program 1 times [2022-03-01 18:21:34,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:34,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795867158] [2022-03-01 18:21:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:34,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:34,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:34,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795867158] [2022-03-01 18:21:34,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795867158] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:34,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950762700] [2022-03-01 18:21:34,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:34,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:34,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:34,812 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) [2022-03-01 18:21:34,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 18:21:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:34,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 18:21:34,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:34,976 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 17 treesize of output 13 [2022-03-01 18:21:35,009 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 14 treesize of output 10 [2022-03-01 18:21:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:35,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:35,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:35,146 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 26 treesize of output 28 [2022-03-01 18:21:35,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:35,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 18:21:35,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:35,243 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 29 treesize of output 31 [2022-03-01 18:21:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:35,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950762700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:35,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:35,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-01 18:21:35,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887940263] [2022-03-01 18:21:35,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:35,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:21:35,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:35,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:21:35,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:21:35,310 INFO L87 Difference]: Start difference. First operand 1112 states and 4075 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:35,445 INFO L93 Difference]: Finished difference Result 2387 states and 8904 transitions. [2022-03-01 18:21:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:21:35,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:21:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:35,453 INFO L225 Difference]: With dead ends: 2387 [2022-03-01 18:21:35,453 INFO L226 Difference]: Without dead ends: 2308 [2022-03-01 18:21:35,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:21:35,454 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 80 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:35,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 144 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:21:35,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-03-01 18:21:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1550. [2022-03-01 18:21:35,511 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) [2022-03-01 18:21:35,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5753 transitions. [2022-03-01 18:21:35,518 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5753 transitions. Word has length 29 [2022-03-01 18:21:35,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:35,518 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5753 transitions. [2022-03-01 18:21:35,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:35,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5753 transitions. [2022-03-01 18:21:35,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:21:35,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:35,523 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] [2022-03-01 18:21:35,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:35,739 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 [2022-03-01 18:21:35,739 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:35,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1158240516, now seen corresponding path program 2 times [2022-03-01 18:21:35,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:35,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455187093] [2022-03-01 18:21:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:35,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:35,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:35,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455187093] [2022-03-01 18:21:35,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455187093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:35,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448937822] [2022-03-01 18:21:35,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:21:35,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:35,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:35,854 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) [2022-03-01 18:21:35,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 18:21:35,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:21:35,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:35,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 18:21:35,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:36,002 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 16 treesize of output 12 [2022-03-01 18:21:36,021 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 14 treesize of output 10 [2022-03-01 18:21:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:36,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:36,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:36,167 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 34 [2022-03-01 18:21:36,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:36,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 18:21:36,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:36,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 18:21:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:36,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448937822] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:36,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:36,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-01 18:21:36,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309998798] [2022-03-01 18:21:36,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:36,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:21:36,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:36,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:21:36,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:21:36,318 INFO L87 Difference]: Start difference. First operand 1550 states and 5753 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2022-03-01 18:21:36,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:36,471 INFO L93 Difference]: Finished difference Result 2792 states and 10515 transitions. [2022-03-01 18:21:36,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:21:36,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 29 [2022-03-01 18:21:36,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:36,480 INFO L225 Difference]: With dead ends: 2792 [2022-03-01 18:21:36,480 INFO L226 Difference]: Without dead ends: 2713 [2022-03-01 18:21:36,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:21:36,481 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 90 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:36,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 152 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:21:36,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-03-01 18:21:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 1749. [2022-03-01 18:21:36,515 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) [2022-03-01 18:21:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6520 transitions. [2022-03-01 18:21:36,521 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6520 transitions. Word has length 29 [2022-03-01 18:21:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:36,521 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 6520 transitions. [2022-03-01 18:21:36,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2022-03-01 18:21:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6520 transitions. [2022-03-01 18:21:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:21:36,525 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:36,525 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] [2022-03-01 18:21:36,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:36,739 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 [2022-03-01 18:21:36,740 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:36,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:36,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1824203434, now seen corresponding path program 3 times [2022-03-01 18:21:36,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:36,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798321558] [2022-03-01 18:21:36,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:36,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:36,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:36,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798321558] [2022-03-01 18:21:36,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798321558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:36,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800188312] [2022-03-01 18:21:36,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:21:36,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:36,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:36,830 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) [2022-03-01 18:21:36,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 18:21:36,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:21:36,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:36,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 18:21:36,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:36,955 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 16 treesize of output 12 [2022-03-01 18:21:36,985 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 15 [2022-03-01 18:21:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:37,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:37,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:37,109 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 34 [2022-03-01 18:21:37,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:37,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 18:21:37,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:37,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 18:21:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:37,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800188312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:37,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:37,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-01 18:21:37,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216054445] [2022-03-01 18:21:37,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:37,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:21:37,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:37,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:21:37,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:21:37,241 INFO L87 Difference]: Start difference. First operand 1749 states and 6520 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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) [2022-03-01 18:21:37,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:37,364 INFO L93 Difference]: Finished difference Result 2570 states and 9639 transitions. [2022-03-01 18:21:37,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:21:37,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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 29 [2022-03-01 18:21:37,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:37,371 INFO L225 Difference]: With dead ends: 2570 [2022-03-01 18:21:37,371 INFO L226 Difference]: Without dead ends: 2491 [2022-03-01 18:21:37,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:21:37,372 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 99 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:37,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 135 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:21:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2022-03-01 18:21:37,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1887. [2022-03-01 18:21:37,405 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) [2022-03-01 18:21:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 7042 transitions. [2022-03-01 18:21:37,411 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 7042 transitions. Word has length 29 [2022-03-01 18:21:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:37,411 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 7042 transitions. [2022-03-01 18:21:37,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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) [2022-03-01 18:21:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 7042 transitions. [2022-03-01 18:21:37,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:21:37,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:37,415 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] [2022-03-01 18:21:37,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:37,631 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 [2022-03-01 18:21:37,632 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:37,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:37,632 INFO L85 PathProgramCache]: Analyzing trace with hash -614164824, now seen corresponding path program 4 times [2022-03-01 18:21:37,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:37,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657435033] [2022-03-01 18:21:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:37,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:37,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:37,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657435033] [2022-03-01 18:21:37,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657435033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:37,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542413172] [2022-03-01 18:21:37,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:21:37,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:37,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:37,731 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) [2022-03-01 18:21:37,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 18:21:37,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:21:37,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:37,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 18:21:37,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:37,842 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 17 treesize of output 13 [2022-03-01 18:21:37,857 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 15 [2022-03-01 18:21:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:37,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:38,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:38,011 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 [2022-03-01 18:21:38,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:38,043 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 37 [2022-03-01 18:21:38,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:38,050 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 33 treesize of output 35 [2022-03-01 18:21:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:38,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542413172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:38,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:38,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-01 18:21:38,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049470598] [2022-03-01 18:21:38,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:38,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:21:38,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:38,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:21:38,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:21:38,151 INFO L87 Difference]: Start difference. First operand 1887 states and 7042 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:38,333 INFO L93 Difference]: Finished difference Result 3006 states and 11331 transitions. [2022-03-01 18:21:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 18:21:38,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:21:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:38,342 INFO L225 Difference]: With dead ends: 3006 [2022-03-01 18:21:38,342 INFO L226 Difference]: Without dead ends: 2927 [2022-03-01 18:21:38,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:21:38,342 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 73 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:38,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 154 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:21:38,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2022-03-01 18:21:38,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2081. [2022-03-01 18:21:38,378 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) [2022-03-01 18:21:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7804 transitions. [2022-03-01 18:21:38,384 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7804 transitions. Word has length 29 [2022-03-01 18:21:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:38,384 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 7804 transitions. [2022-03-01 18:21:38,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7804 transitions. [2022-03-01 18:21:38,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:21:38,389 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:38,389 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] [2022-03-01 18:21:38,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-01 18:21:38,591 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 [2022-03-01 18:21:38,592 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash -357509362, now seen corresponding path program 5 times [2022-03-01 18:21:38,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:38,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199322379] [2022-03-01 18:21:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:38,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:38,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:38,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199322379] [2022-03-01 18:21:38,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199322379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:38,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739551308] [2022-03-01 18:21:38,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:21:38,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:38,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:38,680 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) [2022-03-01 18:21:38,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 18:21:38,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:21:38,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:38,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:21:38,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:38,800 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 16 treesize of output 12 [2022-03-01 18:21:38,840 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 14 [2022-03-01 18:21:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:38,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:38,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:38,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:21:38,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:38,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 18:21:38,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:38,991 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 34 [2022-03-01 18:21:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:39,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739551308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:39,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:39,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-01 18:21:39,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578893228] [2022-03-01 18:21:39,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:39,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:21:39,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:39,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:21:39,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:21:39,093 INFO L87 Difference]: Start difference. First operand 2081 states and 7804 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:39,265 INFO L93 Difference]: Finished difference Result 2784 states and 10455 transitions. [2022-03-01 18:21:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 18:21:39,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 18:21:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:39,273 INFO L225 Difference]: With dead ends: 2784 [2022-03-01 18:21:39,273 INFO L226 Difference]: Without dead ends: 2705 [2022-03-01 18:21:39,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:21:39,274 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 79 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:39,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 156 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:21:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2022-03-01 18:21:39,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1882. [2022-03-01 18:21:39,305 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) [2022-03-01 18:21:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 7037 transitions. [2022-03-01 18:21:39,310 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 7037 transitions. Word has length 29 [2022-03-01 18:21:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:39,310 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 7037 transitions. [2022-03-01 18:21:39,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 7037 transitions. [2022-03-01 18:21:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:21:39,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:39,314 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] [2022-03-01 18:21:39,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:39,533 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 [2022-03-01 18:21:39,533 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:39,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:39,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1162136574, now seen corresponding path program 6 times [2022-03-01 18:21:39,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:39,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156673101] [2022-03-01 18:21:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:39,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:39,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:39,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156673101] [2022-03-01 18:21:39,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156673101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:39,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882619442] [2022-03-01 18:21:39,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:21:39,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:39,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:39,648 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) [2022-03-01 18:21:39,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 18:21:39,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:21:39,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:39,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:21:39,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:39,778 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 15 treesize of output 11 [2022-03-01 18:21:39,802 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 15 treesize of output 11 [2022-03-01 18:21:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:39,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:39,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:39,946 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 [2022-03-01 18:21:40,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:40,011 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 37 [2022-03-01 18:21:40,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:40,019 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 33 treesize of output 35 [2022-03-01 18:21:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:40,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882619442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:40,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:40,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-01 18:21:40,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460700285] [2022-03-01 18:21:40,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:40,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:21:40,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:40,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:21:40,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:21:40,134 INFO L87 Difference]: Start difference. First operand 1882 states and 7037 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:40,312 INFO L93 Difference]: Finished difference Result 2657 states and 9932 transitions. [2022-03-01 18:21:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:21:40,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 18:21:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:40,354 INFO L225 Difference]: With dead ends: 2657 [2022-03-01 18:21:40,354 INFO L226 Difference]: Without dead ends: 2578 [2022-03-01 18:21:40,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:21:40,354 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 89 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:40,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 124 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:21:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-03-01 18:21:40,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1926. [2022-03-01 18:21:40,384 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) [2022-03-01 18:21:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7183 transitions. [2022-03-01 18:21:40,389 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7183 transitions. Word has length 29 [2022-03-01 18:21:40,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:40,390 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 7183 transitions. [2022-03-01 18:21:40,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:40,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7183 transitions. [2022-03-01 18:21:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:21:40,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:40,403 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] [2022-03-01 18:21:40,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:40,619 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 [2022-03-01 18:21:40,620 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:40,620 INFO L85 PathProgramCache]: Analyzing trace with hash 719206604, now seen corresponding path program 7 times [2022-03-01 18:21:40,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:40,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694442938] [2022-03-01 18:21:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:40,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:40,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:40,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694442938] [2022-03-01 18:21:40,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694442938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:40,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476916543] [2022-03-01 18:21:40,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:21:40,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:40,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:40,648 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) [2022-03-01 18:21:40,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 18:21:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:40,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 18:21:40,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:40,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:40,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476916543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:40,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:40,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-03-01 18:21:40,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903626752] [2022-03-01 18:21:40,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:40,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:21:40,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:40,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:21:40,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:21:40,767 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) [2022-03-01 18:21:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:40,867 INFO L93 Difference]: Finished difference Result 3472 states and 12599 transitions. [2022-03-01 18:21:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:21:40,867 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 [2022-03-01 18:21:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:40,876 INFO L225 Difference]: With dead ends: 3472 [2022-03-01 18:21:40,876 INFO L226 Difference]: Without dead ends: 3318 [2022-03-01 18:21:40,877 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 [2022-03-01 18:21:40,877 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:40,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 67 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:21:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2022-03-01 18:21:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2796. [2022-03-01 18:21:40,923 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) [2022-03-01 18:21:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 10507 transitions. [2022-03-01 18:21:40,932 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 10507 transitions. Word has length 31 [2022-03-01 18:21:40,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:40,932 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 10507 transitions. [2022-03-01 18:21:40,932 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) [2022-03-01 18:21:40,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 10507 transitions. [2022-03-01 18:21:40,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:21:40,938 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:40,938 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] [2022-03-01 18:21:40,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:41,151 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 [2022-03-01 18:21:41,152 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1293130992, now seen corresponding path program 8 times [2022-03-01 18:21:41,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:41,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996422542] [2022-03-01 18:21:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:41,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:21:41,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:41,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996422542] [2022-03-01 18:21:41,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996422542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:21:41,169 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:21:41,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:21:41,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505882516] [2022-03-01 18:21:41,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:21:41,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:21:41,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:41,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:21:41,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:21:41,170 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) [2022-03-01 18:21:41,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:41,222 INFO L93 Difference]: Finished difference Result 5761 states and 21881 transitions. [2022-03-01 18:21:41,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:21:41,223 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 [2022-03-01 18:21:41,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:41,237 INFO L225 Difference]: With dead ends: 5761 [2022-03-01 18:21:41,237 INFO L226 Difference]: Without dead ends: 5510 [2022-03-01 18:21:41,237 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 [2022-03-01 18:21:41,238 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 95 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:41,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:21:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2022-03-01 18:21:41,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 4894. [2022-03-01 18:21:41,364 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) [2022-03-01 18:21:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 18975 transitions. [2022-03-01 18:21:41,380 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 18975 transitions. Word has length 31 [2022-03-01 18:21:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:41,380 INFO L470 AbstractCegarLoop]: Abstraction has 4894 states and 18975 transitions. [2022-03-01 18:21:41,380 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) [2022-03-01 18:21:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 18975 transitions. [2022-03-01 18:21:41,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:21:41,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:41,391 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] [2022-03-01 18:21:41,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-01 18:21:41,391 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:41,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:41,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1002043648, now seen corresponding path program 9 times [2022-03-01 18:21:41,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:41,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966467336] [2022-03-01 18:21:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:41,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:21:41,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:41,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966467336] [2022-03-01 18:21:41,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966467336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:41,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089328140] [2022-03-01 18:21:41,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:21:41,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:41,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:41,417 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) [2022-03-01 18:21:41,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 18:21:41,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:21:41,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:41,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:21:41,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:21:41,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:21:41,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089328140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:41,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:41,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-01 18:21:41,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129484819] [2022-03-01 18:21:41,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:41,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:21:41,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:41,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:21:41,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:21:41,636 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) [2022-03-01 18:21:41,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:41,977 INFO L93 Difference]: Finished difference Result 17927 states and 66398 transitions. [2022-03-01 18:21:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 18:21:41,978 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 [2022-03-01 18:21:41,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:42,019 INFO L225 Difference]: With dead ends: 17927 [2022-03-01 18:21:42,019 INFO L226 Difference]: Without dead ends: 15301 [2022-03-01 18:21:42,020 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 [2022-03-01 18:21:42,020 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 168 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:42,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 126 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:21:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2022-03-01 18:21:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 8354. [2022-03-01 18:21:42,250 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) [2022-03-01 18:21:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 33000 transitions. [2022-03-01 18:21:42,280 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 33000 transitions. Word has length 34 [2022-03-01 18:21:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:42,280 INFO L470 AbstractCegarLoop]: Abstraction has 8354 states and 33000 transitions. [2022-03-01 18:21:42,281 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) [2022-03-01 18:21:42,281 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 33000 transitions. [2022-03-01 18:21:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:21:42,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:42,301 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] [2022-03-01 18:21:42,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:42,512 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 [2022-03-01 18:21:42,512 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:42,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:42,512 INFO L85 PathProgramCache]: Analyzing trace with hash -129967119, now seen corresponding path program 10 times [2022-03-01 18:21:42,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:42,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198928240] [2022-03-01 18:21:42,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:42,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:21:42,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:42,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198928240] [2022-03-01 18:21:42,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198928240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:42,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447809025] [2022-03-01 18:21:42,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:21:42,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:42,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:42,543 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) [2022-03-01 18:21:42,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 18:21:42,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:21:42,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:42,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:21:42,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:21:42,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:21:42,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447809025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:42,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:42,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-01 18:21:42,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508224923] [2022-03-01 18:21:42,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:42,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:21:42,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:42,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:21:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:21:42,704 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) [2022-03-01 18:21:43,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:43,187 INFO L93 Difference]: Finished difference Result 21371 states and 81454 transitions. [2022-03-01 18:21:43,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:21:43,187 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 [2022-03-01 18:21:43,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:43,245 INFO L225 Difference]: With dead ends: 21371 [2022-03-01 18:21:43,246 INFO L226 Difference]: Without dead ends: 20932 [2022-03-01 18:21:43,246 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 [2022-03-01 18:21:43,248 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 331 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:43,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 81 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:21:43,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20932 states. [2022-03-01 18:21:43,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20932 to 12631. [2022-03-01 18:21:43,626 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) [2022-03-01 18:21:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 50999 transitions. [2022-03-01 18:21:43,776 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 50999 transitions. Word has length 34 [2022-03-01 18:21:43,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:43,776 INFO L470 AbstractCegarLoop]: Abstraction has 12631 states and 50999 transitions. [2022-03-01 18:21:43,776 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) [2022-03-01 18:21:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 50999 transitions. [2022-03-01 18:21:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:21:43,805 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:43,806 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] [2022-03-01 18:21:43,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:44,022 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 [2022-03-01 18:21:44,022 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:44,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:44,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1761367056, now seen corresponding path program 11 times [2022-03-01 18:21:44,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:44,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262446510] [2022-03-01 18:21:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:44,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:44,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:44,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262446510] [2022-03-01 18:21:44,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262446510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:44,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212958903] [2022-03-01 18:21:44,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:21:44,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:44,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:44,096 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) [2022-03-01 18:21:44,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 18:21:44,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:21:44,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:44,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:21:44,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:44,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:44,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212958903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:44,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:44,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-01 18:21:44,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941207157] [2022-03-01 18:21:44,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:44,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:21:44,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:44,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:21:44,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:21:44,260 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) [2022-03-01 18:21:44,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:44,585 INFO L93 Difference]: Finished difference Result 20596 states and 79596 transitions. [2022-03-01 18:21:44,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 18:21:44,586 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 [2022-03-01 18:21:44,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:44,640 INFO L225 Difference]: With dead ends: 20596 [2022-03-01 18:21:44,640 INFO L226 Difference]: Without dead ends: 20518 [2022-03-01 18:21:44,641 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 [2022-03-01 18:21:44,641 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 169 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:44,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 67 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:21:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20518 states. [2022-03-01 18:21:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 12577. [2022-03-01 18:21:45,056 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) [2022-03-01 18:21:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12577 states to 12577 states and 50833 transitions. [2022-03-01 18:21:45,101 INFO L78 Accepts]: Start accepts. Automaton has 12577 states and 50833 transitions. Word has length 34 [2022-03-01 18:21:45,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:45,101 INFO L470 AbstractCegarLoop]: Abstraction has 12577 states and 50833 transitions. [2022-03-01 18:21:45,101 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) [2022-03-01 18:21:45,101 INFO L276 IsEmpty]: Start isEmpty. Operand 12577 states and 50833 transitions. [2022-03-01 18:21:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:21:45,133 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:45,133 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] [2022-03-01 18:21:45,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:45,333 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 [2022-03-01 18:21:45,333 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:45,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:45,334 INFO L85 PathProgramCache]: Analyzing trace with hash -447820591, now seen corresponding path program 12 times [2022-03-01 18:21:45,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:45,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434748825] [2022-03-01 18:21:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:45,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:45,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:45,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434748825] [2022-03-01 18:21:45,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434748825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:45,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199986791] [2022-03-01 18:21:45,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:21:45,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:45,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:45,366 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) [2022-03-01 18:21:45,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 18:21:45,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:21:45,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:45,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:21:45,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:45,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:45,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199986791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:45,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:45,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-01 18:21:45,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126240096] [2022-03-01 18:21:45,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:45,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:21:45,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:45,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:21:45,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:21:45,546 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) [2022-03-01 18:21:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:45,977 INFO L93 Difference]: Finished difference Result 22733 states and 87606 transitions. [2022-03-01 18:21:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:21:45,977 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 [2022-03-01 18:21:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:46,039 INFO L225 Difference]: With dead ends: 22733 [2022-03-01 18:21:46,039 INFO L226 Difference]: Without dead ends: 21028 [2022-03-01 18:21:46,039 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 [2022-03-01 18:21:46,040 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 243 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:46,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 88 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:21:46,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2022-03-01 18:21:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 15386. [2022-03-01 18:21:46,418 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) [2022-03-01 18:21:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 62363 transitions. [2022-03-01 18:21:46,468 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 62363 transitions. Word has length 34 [2022-03-01 18:21:46,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:46,468 INFO L470 AbstractCegarLoop]: Abstraction has 15386 states and 62363 transitions. [2022-03-01 18:21:46,468 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) [2022-03-01 18:21:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 62363 transitions. [2022-03-01 18:21:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:21:46,498 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:46,498 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] [2022-03-01 18:21:46,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-01 18:21:46,699 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 [2022-03-01 18:21:46,700 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:46,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:46,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1932805376, now seen corresponding path program 13 times [2022-03-01 18:21:46,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:46,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406306219] [2022-03-01 18:21:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:46,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:46,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:46,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406306219] [2022-03-01 18:21:46,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406306219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:46,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174026972] [2022-03-01 18:21:46,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:21:46,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:46,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:46,726 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) [2022-03-01 18:21:46,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:21:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:46,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:21:46,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:46,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:46,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174026972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:46,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:46,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-01 18:21:46,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641098262] [2022-03-01 18:21:46,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:46,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:21:46,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:46,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:21:46,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:21:46,884 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) [2022-03-01 18:21:47,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:47,520 INFO L93 Difference]: Finished difference Result 31402 states and 124083 transitions. [2022-03-01 18:21:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:21:47,521 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 [2022-03-01 18:21:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:47,633 INFO L225 Difference]: With dead ends: 31402 [2022-03-01 18:21:47,633 INFO L226 Difference]: Without dead ends: 31094 [2022-03-01 18:21:47,633 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 [2022-03-01 18:21:47,634 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 349 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:47,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 79 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:21:47,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31094 states. [2022-03-01 18:21:48,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31094 to 19812. [2022-03-01 18:21:48,137 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) [2022-03-01 18:21:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19812 states to 19812 states and 81602 transitions. [2022-03-01 18:21:48,204 INFO L78 Accepts]: Start accepts. Automaton has 19812 states and 81602 transitions. Word has length 34 [2022-03-01 18:21:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:48,204 INFO L470 AbstractCegarLoop]: Abstraction has 19812 states and 81602 transitions. [2022-03-01 18:21:48,204 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) [2022-03-01 18:21:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 19812 states and 81602 transitions. [2022-03-01 18:21:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:21:48,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:48,244 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] [2022-03-01 18:21:48,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:48,444 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 [2022-03-01 18:21:48,445 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:48,445 INFO L85 PathProgramCache]: Analyzing trace with hash 19813248, now seen corresponding path program 14 times [2022-03-01 18:21:48,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:48,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821455713] [2022-03-01 18:21:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:48,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:21:48,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:48,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821455713] [2022-03-01 18:21:48,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821455713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:48,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978580150] [2022-03-01 18:21:48,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:21:48,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:48,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:48,490 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) [2022-03-01 18:21:48,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 18:21:48,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:21:48,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:48,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:21:48,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:48,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:21:48,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978580150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:48,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:48,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-01 18:21:48,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756275668] [2022-03-01 18:21:48,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:48,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:21:48,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:48,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:21:48,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:21:48,811 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) [2022-03-01 18:21:49,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:49,300 INFO L93 Difference]: Finished difference Result 33709 states and 133959 transitions. [2022-03-01 18:21:49,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:21:49,301 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 [2022-03-01 18:21:49,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:49,406 INFO L225 Difference]: With dead ends: 33709 [2022-03-01 18:21:49,406 INFO L226 Difference]: Without dead ends: 32656 [2022-03-01 18:21:49,406 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 [2022-03-01 18:21:49,407 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 170 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:49,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 112 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:21:49,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32656 states. [2022-03-01 18:21:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32656 to 23355. [2022-03-01 18:21:50,142 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) [2022-03-01 18:21:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23355 states to 23355 states and 96087 transitions. [2022-03-01 18:21:50,227 INFO L78 Accepts]: Start accepts. Automaton has 23355 states and 96087 transitions. Word has length 34 [2022-03-01 18:21:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:50,227 INFO L470 AbstractCegarLoop]: Abstraction has 23355 states and 96087 transitions. [2022-03-01 18:21:50,227 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) [2022-03-01 18:21:50,228 INFO L276 IsEmpty]: Start isEmpty. Operand 23355 states and 96087 transitions. [2022-03-01 18:21:50,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:21:50,276 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:50,276 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] [2022-03-01 18:21:50,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-01 18:21:50,476 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 [2022-03-01 18:21:50,477 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:50,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash -650007193, now seen corresponding path program 15 times [2022-03-01 18:21:50,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:50,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80650720] [2022-03-01 18:21:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:50,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:21:50,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:50,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80650720] [2022-03-01 18:21:50,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80650720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:50,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67709466] [2022-03-01 18:21:50,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:21:50,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:50,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:50,510 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) [2022-03-01 18:21:50,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 18:21:50,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:21:50,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:50,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:21:50,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:50,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 18:21:50,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67709466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:50,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:50,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-01 18:21:50,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188977648] [2022-03-01 18:21:50,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:50,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:21:50,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:50,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:21:50,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:21:50,679 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) [2022-03-01 18:21:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:51,245 INFO L93 Difference]: Finished difference Result 31214 states and 125510 transitions. [2022-03-01 18:21:51,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 18:21:51,245 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 [2022-03-01 18:21:51,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:51,381 INFO L225 Difference]: With dead ends: 31214 [2022-03-01 18:21:51,381 INFO L226 Difference]: Without dead ends: 31106 [2022-03-01 18:21:51,382 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 [2022-03-01 18:21:51,382 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 149 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:51,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 81 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:21:51,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31106 states. [2022-03-01 18:21:51,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31106 to 24543. [2022-03-01 18:21:52,040 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) [2022-03-01 18:21:52,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24543 states to 24543 states and 101482 transitions. [2022-03-01 18:21:52,153 INFO L78 Accepts]: Start accepts. Automaton has 24543 states and 101482 transitions. Word has length 34 [2022-03-01 18:21:52,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:52,153 INFO L470 AbstractCegarLoop]: Abstraction has 24543 states and 101482 transitions. [2022-03-01 18:21:52,153 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) [2022-03-01 18:21:52,153 INFO L276 IsEmpty]: Start isEmpty. Operand 24543 states and 101482 transitions. [2022-03-01 18:21:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:21:52,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:52,212 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] [2022-03-01 18:21:52,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:52,413 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 [2022-03-01 18:21:52,413 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:52,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:52,413 INFO L85 PathProgramCache]: Analyzing trace with hash -2144646697, now seen corresponding path program 16 times [2022-03-01 18:21:52,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:52,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307855204] [2022-03-01 18:21:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:52,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-01 18:21:52,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:52,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307855204] [2022-03-01 18:21:52,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307855204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:52,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79941821] [2022-03-01 18:21:52,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:21:52,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:52,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:52,451 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) [2022-03-01 18:21:52,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 18:21:52,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:21:52,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:52,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:21:52,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-01 18:21:52,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-01 18:21:52,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79941821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:21:52,527 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-01 18:21:52,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-03-01 18:21:52,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307382222] [2022-03-01 18:21:52,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:21:52,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:21:52,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:52,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:21:52,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:21:52,528 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) [2022-03-01 18:21:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:52,742 INFO L93 Difference]: Finished difference Result 29524 states and 121533 transitions. [2022-03-01 18:21:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:21:52,743 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 [2022-03-01 18:21:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:53,004 INFO L225 Difference]: With dead ends: 29524 [2022-03-01 18:21:53,005 INFO L226 Difference]: Without dead ends: 29524 [2022-03-01 18:21:53,005 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 [2022-03-01 18:21:53,005 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 [2022-03-01 18:21:53,005 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] [2022-03-01 18:21:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29524 states. [2022-03-01 18:21:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29524 to 22120. [2022-03-01 18:21:53,512 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) [2022-03-01 18:21:53,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22120 states to 22120 states and 90605 transitions. [2022-03-01 18:21:53,587 INFO L78 Accepts]: Start accepts. Automaton has 22120 states and 90605 transitions. Word has length 37 [2022-03-01 18:21:53,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:53,587 INFO L470 AbstractCegarLoop]: Abstraction has 22120 states and 90605 transitions. [2022-03-01 18:21:53,587 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) [2022-03-01 18:21:53,587 INFO L276 IsEmpty]: Start isEmpty. Operand 22120 states and 90605 transitions. [2022-03-01 18:21:53,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:21:53,635 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:53,635 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] [2022-03-01 18:21:53,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:53,835 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 [2022-03-01 18:21:53,835 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:53,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:53,836 INFO L85 PathProgramCache]: Analyzing trace with hash -461619199, now seen corresponding path program 17 times [2022-03-01 18:21:53,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:53,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857973707] [2022-03-01 18:21:53,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:53,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-01 18:21:53,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:53,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857973707] [2022-03-01 18:21:53,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857973707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:53,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493862023] [2022-03-01 18:21:53,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:21:53,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:53,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:53,862 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) [2022-03-01 18:21:53,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 18:21:53,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:21:53,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:53,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:21:53,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-01 18:21:53,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-01 18:21:53,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493862023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:21:53,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-01 18:21:53,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-03-01 18:21:53,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659209539] [2022-03-01 18:21:53,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:21:53,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:21:53,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:53,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:21:53,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:21:53,951 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) [2022-03-01 18:21:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:54,153 INFO L93 Difference]: Finished difference Result 30000 states and 123549 transitions. [2022-03-01 18:21:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:21:54,154 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 [2022-03-01 18:21:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:54,448 INFO L225 Difference]: With dead ends: 30000 [2022-03-01 18:21:54,449 INFO L226 Difference]: Without dead ends: 30000 [2022-03-01 18:21:54,449 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 [2022-03-01 18:21:54,449 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:54,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 68 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:21:54,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30000 states. [2022-03-01 18:21:54,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30000 to 24376. [2022-03-01 18:21:55,035 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) [2022-03-01 18:21:55,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24376 states to 24376 states and 99742 transitions. [2022-03-01 18:21:55,142 INFO L78 Accepts]: Start accepts. Automaton has 24376 states and 99742 transitions. Word has length 37 [2022-03-01 18:21:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:55,142 INFO L470 AbstractCegarLoop]: Abstraction has 24376 states and 99742 transitions. [2022-03-01 18:21:55,142 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) [2022-03-01 18:21:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 24376 states and 99742 transitions. [2022-03-01 18:21:55,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:21:55,205 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:55,205 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] [2022-03-01 18:21:55,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:55,411 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 [2022-03-01 18:21:55,411 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:55,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:55,412 INFO L85 PathProgramCache]: Analyzing trace with hash -857424067, now seen corresponding path program 18 times [2022-03-01 18:21:55,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:55,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053406803] [2022-03-01 18:21:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:55,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 18:21:55,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:55,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053406803] [2022-03-01 18:21:55,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053406803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:55,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035376498] [2022-03-01 18:21:55,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:21:55,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:55,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:55,442 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) [2022-03-01 18:21:55,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 18:21:55,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:21:55,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:55,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:21:55,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 18:21:55,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 18:21:55,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035376498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:55,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:55,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-03-01 18:21:55,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330288221] [2022-03-01 18:21:55,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:55,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:21:55,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:21:55,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:21:55,586 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) [2022-03-01 18:21:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:55,978 INFO L93 Difference]: Finished difference Result 37294 states and 154370 transitions. [2022-03-01 18:21:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:21:55,978 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 [2022-03-01 18:21:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:56,112 INFO L225 Difference]: With dead ends: 37294 [2022-03-01 18:21:56,112 INFO L226 Difference]: Without dead ends: 37294 [2022-03-01 18:21:56,112 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 [2022-03-01 18:21:56,112 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 72 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 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 [2022-03-01 18:21:56,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 81 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:21:56,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37294 states. [2022-03-01 18:21:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37294 to 34517. [2022-03-01 18:21:56,868 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) [2022-03-01 18:21:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34517 states to 34517 states and 142766 transitions. [2022-03-01 18:21:57,149 INFO L78 Accepts]: Start accepts. Automaton has 34517 states and 142766 transitions. Word has length 37 [2022-03-01 18:21:57,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:57,149 INFO L470 AbstractCegarLoop]: Abstraction has 34517 states and 142766 transitions. [2022-03-01 18:21:57,149 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) [2022-03-01 18:21:57,150 INFO L276 IsEmpty]: Start isEmpty. Operand 34517 states and 142766 transitions. [2022-03-01 18:21:57,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:21:57,261 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:57,261 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] [2022-03-01 18:21:57,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:57,463 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 [2022-03-01 18:21:57,463 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:21:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash -709164033, now seen corresponding path program 19 times [2022-03-01 18:21:57,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:57,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318880898] [2022-03-01 18:21:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:57,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:57,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:57,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318880898] [2022-03-01 18:21:57,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318880898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:57,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355846819] [2022-03-01 18:21:57,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:21:57,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:57,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:57,877 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) [2022-03-01 18:21:57,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 18:21:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:57,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:21:57,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:58,176 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:21:58,176 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 18 [2022-03-01 18:21:58,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-01 18:21:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:58,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:58,604 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:58,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 60 [2022-03-01 18:21:58,889 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:58,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-03-01 18:21:58,917 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:58,917 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 67 treesize of output 85 [2022-03-01 18:21:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:59,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355846819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:59,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:59,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-01 18:21:59,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235771281] [2022-03-01 18:21:59,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:59,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:21:59,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:59,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:21:59,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:21:59,439 INFO L87 Difference]: Start difference. First operand 34517 states and 142766 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 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) [2022-03-01 18:22:01,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:01,654 INFO L93 Difference]: Finished difference Result 67293 states and 275148 transitions. [2022-03-01 18:22:01,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 18:22:01,654 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 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 [2022-03-01 18:22:01,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:02,107 INFO L225 Difference]: With dead ends: 67293 [2022-03-01 18:22:02,107 INFO L226 Difference]: Without dead ends: 67101 [2022-03-01 18:22:02,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=334, Invalid=2318, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:22:02,108 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 579 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:02,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 472 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 18:22:02,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67101 states. [2022-03-01 18:22:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67101 to 34913. [2022-03-01 18:22:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34913 states, 34912 states have (on average 4.134910632447296) internal successors, (144358), 34912 states have internal predecessors, (144358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34913 states to 34913 states and 144358 transitions. [2022-03-01 18:22:03,362 INFO L78 Accepts]: Start accepts. Automaton has 34913 states and 144358 transitions. Word has length 39 [2022-03-01 18:22:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:03,362 INFO L470 AbstractCegarLoop]: Abstraction has 34913 states and 144358 transitions. [2022-03-01 18:22:03,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 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) [2022-03-01 18:22:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 34913 states and 144358 transitions. [2022-03-01 18:22:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:22:03,454 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:03,454 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] [2022-03-01 18:22:03,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 18:22:03,655 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 [2022-03-01 18:22:03,655 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:22:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash -943081597, now seen corresponding path program 20 times [2022-03-01 18:22:03,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:03,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178410832] [2022-03-01 18:22:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:03,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:04,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:04,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178410832] [2022-03-01 18:22:04,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178410832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:04,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601150125] [2022-03-01 18:22:04,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:22:04,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:04,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:04,261 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) [2022-03-01 18:22:04,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 18:22:04,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:22:04,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:04,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:22:04,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:04,536 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:22:04,536 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 16 [2022-03-01 18:22:04,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-01 18:22:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:04,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:04,924 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:04,924 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 36 treesize of output 60 [2022-03-01 18:22:05,196 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:05,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-03-01 18:22:05,223 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:05,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 85 [2022-03-01 18:22:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:05,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601150125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:05,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:05,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-01 18:22:05,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999392045] [2022-03-01 18:22:05,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:05,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:22:05,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:05,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:22:05,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:22:05,705 INFO L87 Difference]: Start difference. First operand 34913 states and 144358 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 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) [2022-03-01 18:22:08,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:08,535 INFO L93 Difference]: Finished difference Result 73959 states and 303171 transitions. [2022-03-01 18:22:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:22:08,536 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 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 [2022-03-01 18:22:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:08,852 INFO L225 Difference]: With dead ends: 73959 [2022-03-01 18:22:08,852 INFO L226 Difference]: Without dead ends: 73743 [2022-03-01 18:22:08,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=435, Invalid=2987, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 18:22:08,853 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 629 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 3594 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 3688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:08,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 691 Invalid, 3688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3594 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 18:22:08,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73743 states. [2022-03-01 18:22:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73743 to 35063. [2022-03-01 18:22:10,116 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) [2022-03-01 18:22:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35063 states to 35063 states and 144930 transitions. [2022-03-01 18:22:10,255 INFO L78 Accepts]: Start accepts. Automaton has 35063 states and 144930 transitions. Word has length 39 [2022-03-01 18:22:10,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:10,255 INFO L470 AbstractCegarLoop]: Abstraction has 35063 states and 144930 transitions. [2022-03-01 18:22:10,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 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) [2022-03-01 18:22:10,255 INFO L276 IsEmpty]: Start isEmpty. Operand 35063 states and 144930 transitions. [2022-03-01 18:22:10,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:22:10,338 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:10,338 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] [2022-03-01 18:22:10,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 18:22:10,539 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 [2022-03-01 18:22:10,539 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:22:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash 868774019, now seen corresponding path program 21 times [2022-03-01 18:22:10,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:10,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717831443] [2022-03-01 18:22:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:10,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:10,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:10,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717831443] [2022-03-01 18:22:10,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717831443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:10,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235494741] [2022-03-01 18:22:10,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:22:10,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:10,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:10,897 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) [2022-03-01 18:22:10,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 18:22:10,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:22:10,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:10,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-01 18:22:10,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:11,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:11,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:11,409 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 30 treesize of output 36 [2022-03-01 18:22:11,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:11,623 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 28 treesize of output 36 [2022-03-01 18:22:11,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:11,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:11,725 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 41 treesize of output 47 [2022-03-01 18:22:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:11,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:12,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:12,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:12,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:12,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:12,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 47 [2022-03-01 18:22:17,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:17,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:17,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:17,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:17,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 102 [2022-03-01 18:22:17,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:17,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:17,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:17,590 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 110 treesize of output 112 [2022-03-01 18:22:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:18,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235494741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:18,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:18,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 45 [2022-03-01 18:22:18,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911641339] [2022-03-01 18:22:18,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:18,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:22:18,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:18,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:22:18,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:22:18,679 INFO L87 Difference]: Start difference. First operand 35063 states and 144930 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:15,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:15,033 INFO L93 Difference]: Finished difference Result 85082 states and 341640 transitions. [2022-03-01 18:23:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-03-01 18:23:15,033 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:23:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:15,392 INFO L225 Difference]: With dead ends: 85082 [2022-03-01 18:23:15,392 INFO L226 Difference]: Without dead ends: 85008 [2022-03-01 18:23:15,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 67 SyntacticMatches, 32 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18768 ImplicationChecksByTransitivity, 54.8s TimeCoverageRelationStatistics Valid=5360, Invalid=36033, Unknown=19, NotChecked=0, Total=41412 [2022-03-01 18:23:15,402 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1446 mSDsluCounter, 4879 mSDsCounter, 0 mSdLazyCounter, 2765 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 15426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12404 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:15,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1446 Valid, 1281 Invalid, 15426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2765 Invalid, 0 Unknown, 12404 Unchecked, 1.4s Time] [2022-03-01 18:23:15,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85008 states. [2022-03-01 18:23:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85008 to 36789. [2022-03-01 18:23:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36789 states, 36788 states have (on average 4.1157442644340545) internal successors, (151410), 36788 states have internal predecessors, (151410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36789 states to 36789 states and 151410 transitions. [2022-03-01 18:23:16,966 INFO L78 Accepts]: Start accepts. Automaton has 36789 states and 151410 transitions. Word has length 39 [2022-03-01 18:23:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:16,966 INFO L470 AbstractCegarLoop]: Abstraction has 36789 states and 151410 transitions. [2022-03-01 18:23:16,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 36789 states and 151410 transitions. [2022-03-01 18:23:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:23:17,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:17,051 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] [2022-03-01 18:23:17,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-01 18:23:17,251 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 [2022-03-01 18:23:17,251 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:23:17,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:17,252 INFO L85 PathProgramCache]: Analyzing trace with hash -813062891, now seen corresponding path program 22 times [2022-03-01 18:23:17,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:17,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667983404] [2022-03-01 18:23:17,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:17,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:17,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:17,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667983404] [2022-03-01 18:23:17,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667983404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:17,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907946557] [2022-03-01 18:23:17,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:23:17,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:17,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:17,609 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) [2022-03-01 18:23:17,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 18:23:17,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:23:17,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:17,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:23:17,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:17,878 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:23:17,878 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 18 [2022-03-01 18:23:17,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-01 18:23:18,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:23:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:18,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:18,222 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:18,222 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 36 treesize of output 60 [2022-03-01 18:23:18,492 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:18,492 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-03-01 18:23:18,517 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:18,517 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 67 treesize of output 85 [2022-03-01 18:23:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:18,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907946557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:18,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:18,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 33 [2022-03-01 18:23:18,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766971920] [2022-03-01 18:23:18,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:18,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:23:18,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:18,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:23:18,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:23:18,834 INFO L87 Difference]: Start difference. First operand 36789 states and 151410 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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) [2022-03-01 18:23:21,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:21,498 INFO L93 Difference]: Finished difference Result 83699 states and 340717 transitions. [2022-03-01 18:23:21,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:23:21,499 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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 [2022-03-01 18:23:21,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:21,832 INFO L225 Difference]: With dead ends: 83699 [2022-03-01 18:23:21,832 INFO L226 Difference]: Without dead ends: 83644 [2022-03-01 18:23:21,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=376, Invalid=2486, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 18:23:21,833 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 537 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 2904 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:21,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 511 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2904 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 18:23:21,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83644 states. [2022-03-01 18:23:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83644 to 36511. [2022-03-01 18:23:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36511 states, 36510 states have (on average 4.134155026020268) internal successors, (150938), 36510 states have internal predecessors, (150938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36511 states to 36511 states and 150938 transitions. [2022-03-01 18:23:23,676 INFO L78 Accepts]: Start accepts. Automaton has 36511 states and 150938 transitions. Word has length 39 [2022-03-01 18:23:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:23,676 INFO L470 AbstractCegarLoop]: Abstraction has 36511 states and 150938 transitions. [2022-03-01 18:23:23,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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) [2022-03-01 18:23:23,676 INFO L276 IsEmpty]: Start isEmpty. Operand 36511 states and 150938 transitions. [2022-03-01 18:23:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:23:23,758 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:23,759 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] [2022-03-01 18:23:23,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:23,959 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 [2022-03-01 18:23:23,960 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:23:23,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:23,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1038211985, now seen corresponding path program 23 times [2022-03-01 18:23:23,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:23,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893504639] [2022-03-01 18:23:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:23,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:24,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:24,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893504639] [2022-03-01 18:23:24,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893504639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:24,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933347869] [2022-03-01 18:23:24,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:23:24,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:24,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:24,504 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) [2022-03-01 18:23:24,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:23:24,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:23:24,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:24,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-01 18:23:24,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:24,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:24,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2022-03-01 18:23:25,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-03-01 18:23:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:25,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:25,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:25,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:25,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2022-03-01 18:23:25,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:25,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:25,900 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 63 treesize of output 45 [2022-03-01 18:23:25,925 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:25,925 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 20 treesize of output 45 [2022-03-01 18:23:25,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:25,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2022-03-01 18:23:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:26,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933347869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:26,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:26,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 40 [2022-03-01 18:23:26,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90733844] [2022-03-01 18:23:26,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:26,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:23:26,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:26,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:23:26,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:23:26,037 INFO L87 Difference]: Start difference. First operand 36511 states and 150938 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 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) [2022-03-01 18:23:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:39,002 INFO L93 Difference]: Finished difference Result 112883 states and 456658 transitions. [2022-03-01 18:23:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-03-01 18:23:39,002 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 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 [2022-03-01 18:23:39,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:39,695 INFO L225 Difference]: With dead ends: 112883 [2022-03-01 18:23:39,695 INFO L226 Difference]: Without dead ends: 112572 [2022-03-01 18:23:39,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12601 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=4044, Invalid=31488, Unknown=0, NotChecked=0, Total=35532 [2022-03-01 18:23:39,697 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1807 mSDsluCounter, 2863 mSDsCounter, 0 mSdLazyCounter, 4215 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 6914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 4215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2280 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:39,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1807 Valid, 1286 Invalid, 6914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 4215 Invalid, 0 Unknown, 2280 Unchecked, 2.2s Time] [2022-03-01 18:23:39,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112572 states. [2022-03-01 18:23:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112572 to 36899. [2022-03-01 18:23:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36899 states, 36898 states have (on average 4.128326738576616) internal successors, (152327), 36898 states have internal predecessors, (152327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36899 states to 36899 states and 152327 transitions. [2022-03-01 18:23:41,631 INFO L78 Accepts]: Start accepts. Automaton has 36899 states and 152327 transitions. Word has length 39 [2022-03-01 18:23:41,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:41,631 INFO L470 AbstractCegarLoop]: Abstraction has 36899 states and 152327 transitions. [2022-03-01 18:23:41,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 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) [2022-03-01 18:23:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand 36899 states and 152327 transitions. [2022-03-01 18:23:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:23:41,715 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:41,715 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] [2022-03-01 18:23:41,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-01 18:23:41,915 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 [2022-03-01 18:23:41,915 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:23:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:41,916 INFO L85 PathProgramCache]: Analyzing trace with hash 804294421, now seen corresponding path program 24 times [2022-03-01 18:23:41,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:41,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259216212] [2022-03-01 18:23:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:41,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:42,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:42,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259216212] [2022-03-01 18:23:42,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259216212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:42,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317881295] [2022-03-01 18:23:42,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:23:42,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:42,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:42,463 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) [2022-03-01 18:23:42,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:23:42,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:23:42,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:42,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-01 18:23:42,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:42,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:42,774 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 26 treesize of output 44 [2022-03-01 18:23:42,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-01 18:23:43,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:43,008 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 11 treesize of output 3 [2022-03-01 18:23:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:43,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:43,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:43,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:43,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:43,369 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 53 treesize of output 73 [2022-03-01 18:23:44,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:44,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:44,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 72 [2022-03-01 18:23:44,265 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:44,265 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 78 treesize of output 82 [2022-03-01 18:23:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:44,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317881295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:44,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:44,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 38 [2022-03-01 18:23:44,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877288830] [2022-03-01 18:23:44,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:44,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-01 18:23:44,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:44,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-01 18:23:44,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:23:44,674 INFO L87 Difference]: Start difference. First operand 36899 states and 152327 transitions. Second operand has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:48,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:48,366 INFO L93 Difference]: Finished difference Result 68964 states and 278866 transitions. [2022-03-01 18:23:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 18:23:48,367 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:23:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:48,643 INFO L225 Difference]: With dead ends: 68964 [2022-03-01 18:23:48,643 INFO L226 Difference]: Without dead ends: 68817 [2022-03-01 18:23:48,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2408 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1099, Invalid=6557, Unknown=0, NotChecked=0, Total=7656 [2022-03-01 18:23:48,644 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 647 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 3794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1533 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:48,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 821 Invalid, 3794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2165 Invalid, 0 Unknown, 1533 Unchecked, 1.1s Time] [2022-03-01 18:23:48,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68817 states. [2022-03-01 18:23:49,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68817 to 37697. [2022-03-01 18:23:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37697 states, 37696 states have (on average 4.120331069609508) internal successors, (155320), 37696 states have internal predecessors, (155320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37697 states to 37697 states and 155320 transitions. [2022-03-01 18:23:50,178 INFO L78 Accepts]: Start accepts. Automaton has 37697 states and 155320 transitions. Word has length 39 [2022-03-01 18:23:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:50,178 INFO L470 AbstractCegarLoop]: Abstraction has 37697 states and 155320 transitions. [2022-03-01 18:23:50,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:50,178 INFO L276 IsEmpty]: Start isEmpty. Operand 37697 states and 155320 transitions. [2022-03-01 18:23:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:23:50,284 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:50,284 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] [2022-03-01 18:23:50,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-01 18:23:50,485 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 [2022-03-01 18:23:50,485 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:23:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:50,486 INFO L85 PathProgramCache]: Analyzing trace with hash -305709141, now seen corresponding path program 25 times [2022-03-01 18:23:50,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:50,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326524364] [2022-03-01 18:23:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:50,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:50,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:50,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326524364] [2022-03-01 18:23:50,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326524364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:50,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880399845] [2022-03-01 18:23:50,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:23:50,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:50,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:50,864 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) [2022-03-01 18:23:50,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 18:23:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:50,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:23:50,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:51,160 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:23:51,160 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 18 [2022-03-01 18:23:51,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-01 18:23:51,313 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 17 treesize of output 9 [2022-03-01 18:23:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:51,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:51,552 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:51,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 63 [2022-03-01 18:23:51,791 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:51,791 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 45 treesize of output 69 [2022-03-01 18:23:51,815 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:51,816 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 67 treesize of output 85 [2022-03-01 18:23:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:52,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880399845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:52,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:52,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-01 18:23:52,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788156748] [2022-03-01 18:23:52,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:52,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:23:52,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:52,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:23:52,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:23:52,295 INFO L87 Difference]: Start difference. First operand 37697 states and 155320 transitions. Second operand has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 34 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) [2022-03-01 18:23:55,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:55,540 INFO L93 Difference]: Finished difference Result 91699 states and 372721 transitions. [2022-03-01 18:23:55,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:23:55,541 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 34 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 [2022-03-01 18:23:55,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:55,973 INFO L225 Difference]: With dead ends: 91699 [2022-03-01 18:23:55,973 INFO L226 Difference]: Without dead ends: 91443 [2022-03-01 18:23:55,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=543, Invalid=3747, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 18:23:55,974 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 645 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 3676 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 3773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:55,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 663 Invalid, 3773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3676 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 18:23:56,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91443 states. [2022-03-01 18:23:57,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91443 to 37049. [2022-03-01 18:23:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37049 states, 37048 states have (on average 4.127051392787735) internal successors, (152899), 37048 states have internal predecessors, (152899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37049 states to 37049 states and 152899 transitions. [2022-03-01 18:23:57,797 INFO L78 Accepts]: Start accepts. Automaton has 37049 states and 152899 transitions. Word has length 39 [2022-03-01 18:23:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:57,797 INFO L470 AbstractCegarLoop]: Abstraction has 37049 states and 152899 transitions. [2022-03-01 18:23:57,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 34 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) [2022-03-01 18:23:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 37049 states and 152899 transitions. [2022-03-01 18:23:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:23:57,879 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:57,879 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] [2022-03-01 18:23:57,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:58,080 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 [2022-03-01 18:23:58,080 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:23:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:58,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1678817259, now seen corresponding path program 26 times [2022-03-01 18:23:58,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:58,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558829215] [2022-03-01 18:23:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:58,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:58,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:58,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558829215] [2022-03-01 18:23:58,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558829215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:58,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805419248] [2022-03-01 18:23:58,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:23:58,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:58,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:58,429 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) [2022-03-01 18:23:58,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 18:23:58,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:23:58,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:58,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:23:58,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:58,876 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:23:58,876 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 16 [2022-03-01 18:23:58,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-01 18:23:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:59,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:59,240 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:59,241 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 39 treesize of output 63 [2022-03-01 18:23:59,479 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:59,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 70 [2022-03-01 18:23:59,506 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:59,506 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 68 treesize of output 86 [2022-03-01 18:23:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:59,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805419248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:59,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:59,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 33 [2022-03-01 18:23:59,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382286164] [2022-03-01 18:23:59,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:59,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:23:59,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:59,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:23:59,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:23:59,944 INFO L87 Difference]: Start difference. First operand 37049 states and 152899 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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) [2022-03-01 18:24:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:01,973 INFO L93 Difference]: Finished difference Result 69511 states and 285616 transitions. [2022-03-01 18:24:01,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:24:01,975 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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 [2022-03-01 18:24:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:02,432 INFO L225 Difference]: With dead ends: 69511 [2022-03-01 18:24:02,432 INFO L226 Difference]: Without dead ends: 69456 [2022-03-01 18:24:02,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=309, Invalid=1947, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:24:02,433 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 383 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 2846 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:02,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 534 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2846 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 18:24:02,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69456 states. [2022-03-01 18:24:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69456 to 36877. [2022-03-01 18:24:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36877 states, 36876 states have (on average 4.128864301985031) internal successors, (152256), 36876 states have internal predecessors, (152256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:03,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36877 states to 36877 states and 152256 transitions. [2022-03-01 18:24:03,885 INFO L78 Accepts]: Start accepts. Automaton has 36877 states and 152256 transitions. Word has length 39 [2022-03-01 18:24:03,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:03,885 INFO L470 AbstractCegarLoop]: Abstraction has 36877 states and 152256 transitions. [2022-03-01 18:24:03,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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) [2022-03-01 18:24:03,885 INFO L276 IsEmpty]: Start isEmpty. Operand 36877 states and 152256 transitions. [2022-03-01 18:24:03,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:24:03,980 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:03,980 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] [2022-03-01 18:24:03,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-01 18:24:04,181 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 [2022-03-01 18:24:04,181 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:24:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:04,181 INFO L85 PathProgramCache]: Analyzing trace with hash 847258595, now seen corresponding path program 27 times [2022-03-01 18:24:04,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:04,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128101093] [2022-03-01 18:24:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:04,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:04,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:04,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128101093] [2022-03-01 18:24:04,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128101093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:04,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344249964] [2022-03-01 18:24:04,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:24:04,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:04,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:04,577 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) [2022-03-01 18:24:04,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 18:24:04,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:24:04,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:04,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-01 18:24:04,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:05,173 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-01 18:24:05,174 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 34 treesize of output 18 [2022-03-01 18:24:05,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:05,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:05,457 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 37 treesize of output 45 [2022-03-01 18:24:05,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:05,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:05,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:05,764 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 59 treesize of output 49 [2022-03-01 18:24:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:05,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:06,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:06,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:06,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:06,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 70 [2022-03-01 18:24:07,234 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:24:07,235 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 66 treesize of output 84 [2022-03-01 18:24:07,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:07,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:07,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:07,256 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 80 treesize of output 96 [2022-03-01 18:24:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:08,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344249964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:08,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:08,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2022-03-01 18:24:08,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020275613] [2022-03-01 18:24:08,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:08,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:24:08,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:08,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:24:08,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:24:08,286 INFO L87 Difference]: Start difference. First operand 36877 states and 152256 transitions. Second operand has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 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) [2022-03-01 18:24:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:11,179 INFO L93 Difference]: Finished difference Result 58469 states and 237492 transitions. [2022-03-01 18:24:11,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-01 18:24:11,180 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 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 [2022-03-01 18:24:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:11,403 INFO L225 Difference]: With dead ends: 58469 [2022-03-01 18:24:11,404 INFO L226 Difference]: Without dead ends: 58410 [2022-03-01 18:24:11,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 67 SyntacticMatches, 11 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2379 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1104, Invalid=5376, Unknown=0, NotChecked=0, Total=6480 [2022-03-01 18:24:11,404 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 486 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2688 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:11,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 545 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 788 Invalid, 0 Unknown, 2688 Unchecked, 0.4s Time] [2022-03-01 18:24:11,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58410 states. [2022-03-01 18:24:12,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58410 to 37371. [2022-03-01 18:24:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37371 states, 37370 states have (on average 4.122076531977522) internal successors, (154042), 37370 states have internal predecessors, (154042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37371 states to 37371 states and 154042 transitions. [2022-03-01 18:24:12,698 INFO L78 Accepts]: Start accepts. Automaton has 37371 states and 154042 transitions. Word has length 39 [2022-03-01 18:24:12,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:12,699 INFO L470 AbstractCegarLoop]: Abstraction has 37371 states and 154042 transitions. [2022-03-01 18:24:12,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 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) [2022-03-01 18:24:12,699 INFO L276 IsEmpty]: Start isEmpty. Operand 37371 states and 154042 transitions. [2022-03-01 18:24:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:24:12,793 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:12,793 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] [2022-03-01 18:24:12,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:12,993 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 [2022-03-01 18:24:12,994 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:24:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:12,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1095774921, now seen corresponding path program 28 times [2022-03-01 18:24:12,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:12,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935709329] [2022-03-01 18:24:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:12,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:13,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:13,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935709329] [2022-03-01 18:24:13,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935709329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:13,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264064797] [2022-03-01 18:24:13,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:24:13,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:13,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:13,391 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) [2022-03-01 18:24:13,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 18:24:13,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:24:13,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:13,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:24:13,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:13,694 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:24:13,694 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 33 treesize of output 21 [2022-03-01 18:24:13,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-01 18:24:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:13,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:14,256 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:24:14,256 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 [2022-03-01 18:24:14,565 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:24:14,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 83 [2022-03-01 18:24:14,594 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:24:14,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 93 [2022-03-01 18:24:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:14,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264064797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:14,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:14,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 33 [2022-03-01 18:24:14,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874224562] [2022-03-01 18:24:14,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:14,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:24:14,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:14,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:24:14,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:24:14,980 INFO L87 Difference]: Start difference. First operand 37371 states and 154042 transitions. Second operand has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 33 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) [2022-03-01 18:24:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:17,208 INFO L93 Difference]: Finished difference Result 72319 states and 295080 transitions. [2022-03-01 18:24:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 18:24:17,209 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 33 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 [2022-03-01 18:24:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:17,678 INFO L225 Difference]: With dead ends: 72319 [2022-03-01 18:24:17,679 INFO L226 Difference]: Without dead ends: 72123 [2022-03-01 18:24:17,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=327, Invalid=2325, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:24:17,679 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 444 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 2650 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 2725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:17,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 462 Invalid, 2725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2650 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 18:24:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72123 states. [2022-03-01 18:24:18,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72123 to 36801. [2022-03-01 18:24:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36801 states, 36800 states have (on average 4.13133152173913) internal successors, (152033), 36800 states have internal predecessors, (152033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36801 states to 36801 states and 152033 transitions. [2022-03-01 18:24:19,114 INFO L78 Accepts]: Start accepts. Automaton has 36801 states and 152033 transitions. Word has length 39 [2022-03-01 18:24:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:19,114 INFO L470 AbstractCegarLoop]: Abstraction has 36801 states and 152033 transitions. [2022-03-01 18:24:19,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 33 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) [2022-03-01 18:24:19,114 INFO L276 IsEmpty]: Start isEmpty. Operand 36801 states and 152033 transitions. [2022-03-01 18:24:19,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:24:19,209 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:19,209 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] [2022-03-01 18:24:19,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-01 18:24:19,410 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 [2022-03-01 18:24:19,410 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:24:19,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:19,410 INFO L85 PathProgramCache]: Analyzing trace with hash 630820215, now seen corresponding path program 29 times [2022-03-01 18:24:19,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:19,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800495603] [2022-03-01 18:24:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:19,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:19,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:19,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800495603] [2022-03-01 18:24:19,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800495603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:19,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286443911] [2022-03-01 18:24:19,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:24:19,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:19,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:19,800 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) [2022-03-01 18:24:19,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 18:24:19,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:24:19,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:19,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-01 18:24:19,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:20,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:20,351 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 38 treesize of output 56 [2022-03-01 18:24:20,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-03-01 18:24:20,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:20,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:20,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:20,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:20,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 45 [2022-03-01 18:24:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:20,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:21,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:21,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:21,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:21,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:21,467 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 55 treesize of output 37 [2022-03-01 18:24:22,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:22,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:22,087 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 57 treesize of output 69 [2022-03-01 18:24:22,114 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:24:22,115 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 75 treesize of output 79 [2022-03-01 18:24:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:22,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286443911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:22,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:22,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 40 [2022-03-01 18:24:22,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364166211] [2022-03-01 18:24:22,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:22,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:24:22,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:22,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:24:22,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:24:22,421 INFO L87 Difference]: Start difference. First operand 36801 states and 152033 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 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) [2022-03-01 18:24:29,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:29,550 INFO L93 Difference]: Finished difference Result 80252 states and 327195 transitions. [2022-03-01 18:24:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-01 18:24:29,550 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 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 [2022-03-01 18:24:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:29,907 INFO L225 Difference]: With dead ends: 80252 [2022-03-01 18:24:29,907 INFO L226 Difference]: Without dead ends: 80059 [2022-03-01 18:24:29,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4120 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1816, Invalid=11990, Unknown=0, NotChecked=0, Total=13806 [2022-03-01 18:24:29,908 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 1351 mSDsluCounter, 2580 mSDsCounter, 0 mSdLazyCounter, 3555 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 7195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 3555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3375 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:29,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1351 Valid, 1005 Invalid, 7195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 3555 Invalid, 0 Unknown, 3375 Unchecked, 1.7s Time] [2022-03-01 18:24:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80059 states. [2022-03-01 18:24:31,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80059 to 37259. [2022-03-01 18:24:31,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37259 states, 37258 states have (on average 4.12480541091846) internal successors, (153682), 37258 states have internal predecessors, (153682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37259 states to 37259 states and 153682 transitions. [2022-03-01 18:24:31,623 INFO L78 Accepts]: Start accepts. Automaton has 37259 states and 153682 transitions. Word has length 39 [2022-03-01 18:24:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:31,623 INFO L470 AbstractCegarLoop]: Abstraction has 37259 states and 153682 transitions. [2022-03-01 18:24:31,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 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) [2022-03-01 18:24:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 37259 states and 153682 transitions. [2022-03-01 18:24:31,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:24:31,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:31,725 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] [2022-03-01 18:24:31,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:31,925 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 [2022-03-01 18:24:31,925 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:24:31,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:31,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1493840823, now seen corresponding path program 30 times [2022-03-01 18:24:31,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:31,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848593823] [2022-03-01 18:24:31,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:31,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:32,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:32,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848593823] [2022-03-01 18:24:32,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848593823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:32,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91043753] [2022-03-01 18:24:32,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:24:32,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:32,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:32,302 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) [2022-03-01 18:24:32,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 18:24:32,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:24:32,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:32,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:24:32,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:33,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:33,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:33,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:33,034 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 21 [2022-03-01 18:24:33,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:33,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:33,323 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 33 treesize of output 25 [2022-03-01 18:24:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:33,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:33,764 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:24:33,765 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 41 treesize of output 65 [2022-03-01 18:24:35,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:35,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:35,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:35,018 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 45 treesize of output 69 [2022-03-01 18:24:35,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:35,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:35,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:35,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:35,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 77 [2022-03-01 18:24:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:35,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91043753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:35,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:35,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 41 [2022-03-01 18:24:35,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021339057] [2022-03-01 18:24:35,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:35,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-01 18:24:35,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:35,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-01 18:24:35,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1491, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:24:35,496 INFO L87 Difference]: Start difference. First operand 37259 states and 153682 transitions. Second operand has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 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) [2022-03-01 18:24:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:39,514 INFO L93 Difference]: Finished difference Result 80782 states and 325196 transitions. [2022-03-01 18:24:39,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 18:24:39,514 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 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 [2022-03-01 18:24:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:40,020 INFO L225 Difference]: With dead ends: 80782 [2022-03-01 18:24:40,020 INFO L226 Difference]: Without dead ends: 80728 [2022-03-01 18:24:40,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2798 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1182, Invalid=8324, Unknown=0, NotChecked=0, Total=9506 [2022-03-01 18:24:40,021 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 527 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 4392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2594 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:40,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 842 Invalid, 4392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1721 Invalid, 0 Unknown, 2594 Unchecked, 0.8s Time] [2022-03-01 18:24:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80728 states. [2022-03-01 18:24:41,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80728 to 37763. [2022-03-01 18:24:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37763 states, 37762 states have (on average 4.117737407976272) internal successors, (155494), 37762 states have internal predecessors, (155494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37763 states to 37763 states and 155494 transitions. [2022-03-01 18:24:41,554 INFO L78 Accepts]: Start accepts. Automaton has 37763 states and 155494 transitions. Word has length 39 [2022-03-01 18:24:41,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:41,554 INFO L470 AbstractCegarLoop]: Abstraction has 37763 states and 155494 transitions. [2022-03-01 18:24:41,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 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) [2022-03-01 18:24:41,555 INFO L276 IsEmpty]: Start isEmpty. Operand 37763 states and 155494 transitions. [2022-03-01 18:24:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:24:41,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:41,650 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] [2022-03-01 18:24:41,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-01 18:24:41,851 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 [2022-03-01 18:24:41,851 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:24:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:41,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1514365043, now seen corresponding path program 31 times [2022-03-01 18:24:41,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:41,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993920955] [2022-03-01 18:24:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:41,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:42,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:42,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993920955] [2022-03-01 18:24:42,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993920955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:42,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980715096] [2022-03-01 18:24:42,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:24:42,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:42,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:42,438 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) [2022-03-01 18:24:42,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 18:24:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:42,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:24:42,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:42,869 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:24:42,870 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 33 treesize of output 21 [2022-03-01 18:24:42,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-01 18:24:42,945 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 17 treesize of output 9 [2022-03-01 18:24:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:42,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:43,188 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:24:43,189 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 39 treesize of output 63 [2022-03-01 18:24:43,424 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:24:43,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-03-01 18:24:43,452 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:24:43,452 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 67 treesize of output 85 [2022-03-01 18:24:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:43,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980715096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:43,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:43,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-01 18:24:43,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008000635] [2022-03-01 18:24:43,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:43,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:24:43,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:43,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:24:43,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:24:43,708 INFO L87 Difference]: Start difference. First operand 37763 states and 155494 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 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) [2022-03-01 18:24:46,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:46,326 INFO L93 Difference]: Finished difference Result 85303 states and 348821 transitions. [2022-03-01 18:24:46,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 18:24:46,326 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 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 [2022-03-01 18:24:46,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:46,720 INFO L225 Difference]: With dead ends: 85303 [2022-03-01 18:24:46,720 INFO L226 Difference]: Without dead ends: 85055 [2022-03-01 18:24:46,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=421, Invalid=2549, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:24:46,721 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 669 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 2840 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 2942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:46,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 502 Invalid, 2942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2840 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-01 18:24:46,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85055 states. [2022-03-01 18:24:48,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85055 to 37951. [2022-03-01 18:24:48,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37951 states, 37950 states have (on average 4.115889328063241) internal successors, (156198), 37950 states have internal predecessors, (156198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37951 states to 37951 states and 156198 transitions. [2022-03-01 18:24:48,510 INFO L78 Accepts]: Start accepts. Automaton has 37951 states and 156198 transitions. Word has length 39 [2022-03-01 18:24:48,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:48,511 INFO L470 AbstractCegarLoop]: Abstraction has 37951 states and 156198 transitions. [2022-03-01 18:24:48,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 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) [2022-03-01 18:24:48,511 INFO L276 IsEmpty]: Start isEmpty. Operand 37951 states and 156198 transitions. [2022-03-01 18:24:48,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:24:48,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:48,608 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] [2022-03-01 18:24:48,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-01 18:24:48,808 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 [2022-03-01 18:24:48,809 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:24:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:48,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1838065757, now seen corresponding path program 32 times [2022-03-01 18:24:48,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:48,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050930420] [2022-03-01 18:24:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:48,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:49,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:49,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050930420] [2022-03-01 18:24:49,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050930420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:49,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032513187] [2022-03-01 18:24:49,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:24:49,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:49,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:49,195 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) [2022-03-01 18:24:49,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 18:24:49,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:24:49,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:49,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:24:49,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:49,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 18:24:49,681 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:24:49,681 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 26 [2022-03-01 18:24:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:49,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:49,948 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:24:49,949 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 39 treesize of output 63 [2022-03-01 18:24:50,201 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:24:50,201 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 45 treesize of output 69 [2022-03-01 18:24:50,384 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:24:50,384 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 67 treesize of output 85 [2022-03-01 18:24:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:50,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032513187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:50,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:50,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-01 18:24:50,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460188195] [2022-03-01 18:24:50,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:50,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:24:50,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:50,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:24:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:24:50,694 INFO L87 Difference]: Start difference. First operand 37951 states and 156198 transitions. Second operand has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 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) [2022-03-01 18:24:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:52,858 INFO L93 Difference]: Finished difference Result 93729 states and 380985 transitions. [2022-03-01 18:24:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:24:52,859 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 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 [2022-03-01 18:24:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:53,483 INFO L225 Difference]: With dead ends: 93729 [2022-03-01 18:24:53,483 INFO L226 Difference]: Without dead ends: 93577 [2022-03-01 18:24:53,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=444, Invalid=2636, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 18:24:53,484 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 665 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:53,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 339 Invalid, 2147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2056 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:24:53,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93577 states. [2022-03-01 18:24:54,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93577 to 38039. [2022-03-01 18:24:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38039 states, 38038 states have (on average 4.116515063883485) internal successors, (156584), 38038 states have internal predecessors, (156584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38039 states to 38039 states and 156584 transitions. [2022-03-01 18:24:55,197 INFO L78 Accepts]: Start accepts. Automaton has 38039 states and 156584 transitions. Word has length 39 [2022-03-01 18:24:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:55,197 INFO L470 AbstractCegarLoop]: Abstraction has 38039 states and 156584 transitions. [2022-03-01 18:24:55,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 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) [2022-03-01 18:24:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 38039 states and 156584 transitions. [2022-03-01 18:24:55,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:24:55,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:55,497 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] [2022-03-01 18:24:55,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:55,713 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 [2022-03-01 18:24:55,714 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:24:55,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:55,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1634145011, now seen corresponding path program 33 times [2022-03-01 18:24:55,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:55,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888598667] [2022-03-01 18:24:55,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:55,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:56,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:56,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888598667] [2022-03-01 18:24:56,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888598667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:56,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445253669] [2022-03-01 18:24:56,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:24:56,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:56,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:56,088 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) [2022-03-01 18:24:56,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 18:24:56,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 18:24:56,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:56,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-01 18:24:56,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:56,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 18:24:56,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:56,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 60 [2022-03-01 18:24:56,621 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 16 treesize of output 8 [2022-03-01 18:24:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:56,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:57,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:57,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:57,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 61 [2022-03-01 18:24:58,004 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:24:58,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 84 [2022-03-01 18:24:58,030 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:24:58,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 94 [2022-03-01 18:24:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:58,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445253669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:58,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:58,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 37 [2022-03-01 18:24:58,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532223391] [2022-03-01 18:24:58,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:58,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-01 18:24:58,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:58,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-01 18:24:58,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:24:58,526 INFO L87 Difference]: Start difference. First operand 38039 states and 156584 transitions. Second operand has 38 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 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) [2022-03-01 18:25:01,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:01,264 INFO L93 Difference]: Finished difference Result 66286 states and 267095 transitions. [2022-03-01 18:25:01,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 18:25:01,264 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 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 [2022-03-01 18:25:01,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:01,678 INFO L225 Difference]: With dead ends: 66286 [2022-03-01 18:25:01,678 INFO L226 Difference]: Without dead ends: 66109 [2022-03-01 18:25:01,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=826, Invalid=4286, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:25:01,679 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 875 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 3507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1997 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:01,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 741 Invalid, 3507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1409 Invalid, 0 Unknown, 1997 Unchecked, 0.7s Time] [2022-03-01 18:25:01,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66109 states. [2022-03-01 18:25:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66109 to 39831. [2022-03-01 18:25:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39831 states, 39830 states have (on average 4.098217424052222) internal successors, (163232), 39830 states have internal predecessors, (163232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39831 states to 39831 states and 163232 transitions. [2022-03-01 18:25:03,112 INFO L78 Accepts]: Start accepts. Automaton has 39831 states and 163232 transitions. Word has length 39 [2022-03-01 18:25:03,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:03,113 INFO L470 AbstractCegarLoop]: Abstraction has 39831 states and 163232 transitions. [2022-03-01 18:25:03,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 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) [2022-03-01 18:25:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 39831 states and 163232 transitions. [2022-03-01 18:25:03,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 18:25:03,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:03,215 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] [2022-03-01 18:25:03,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-01 18:25:03,415 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 [2022-03-01 18:25:03,415 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:25:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:03,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1362875593, now seen corresponding path program 34 times [2022-03-01 18:25:03,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:03,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497331462] [2022-03-01 18:25:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:03,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:03,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:03,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497331462] [2022-03-01 18:25:03,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497331462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:03,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887270635] [2022-03-01 18:25:03,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:25:03,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:03,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:03,782 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) [2022-03-01 18:25:03,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 18:25:03,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:25:03,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:03,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:25:03,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:04,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 18:25:04,248 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:25:04,248 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 40 treesize of output 28 [2022-03-01 18:25:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:04,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:04,543 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:25:04,543 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 [2022-03-01 18:25:05,020 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:25:05,021 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 65 treesize of output 83 [2022-03-01 18:25:05,047 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:25:05,047 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 81 treesize of output 93