/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/max-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:45:48,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:45:48,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:45:48,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:45:49,024 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 [2022-03-15 16:45:49,047 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:45:49,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:45:49,048 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:45:49,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:45:49,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:45:49,048 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:45:49,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:45:49,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:45:49,049 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:45:49,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:45:49,049 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:45:49,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:45:49,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:45:49,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:45:49,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:45:49,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:45:49,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:45:49,050 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:45:49,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:45:49,050 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:45:49,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:45:49,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:45:49,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:45:49,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:45:49,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:45:49,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:45:49,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:45:49,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:45:49,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:45:49,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:45:49,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:45:49,051 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:45:49,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:45:49,052 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:45:49,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:45:49,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:45:49,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:45:49,270 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:45:49,271 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:45:49,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl [2022-03-15 16:45:49,272 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl' [2022-03-15 16:45:49,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:45:49,291 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:45:49,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:45:49,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:45:49,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:45:49,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:45:49" (1/1) ... [2022-03-15 16:45:49,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:45:49" (1/1) ... [2022-03-15 16:45:49,319 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:45:49,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:45:49,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:45:49,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:45:49,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:45:49,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:45:49" (1/1) ... [2022-03-15 16:45:49,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:45:49" (1/1) ... [2022-03-15 16:45:49,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:45:49" (1/1) ... [2022-03-15 16:45:49,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:45:49" (1/1) ... [2022-03-15 16:45:49,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:45:49" (1/1) ... [2022-03-15 16:45:49,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:45:49" (1/1) ... [2022-03-15 16:45:49,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:45:49" (1/1) ... [2022-03-15 16:45:49,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:45:49,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:45:49,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:45:49,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:45:49,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:45:49" (1/1) ... [2022-03-15 16:45:49,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:45:49,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:49,368 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 16:45:49,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 16:45:49,402 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:45:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:45:49,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:45:49,402 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:45:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:45:49,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:45:49,403 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:45:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:45:49,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:45:49,403 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 16:45:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 16:45:49,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 16:45:49,404 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:45:49,438 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:45:49,439 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:45:49,522 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:45:49,532 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:45:49,532 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:45:49,533 INFO L202 PluginConnector]: Adding new model max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:45:49 BoogieIcfgContainer [2022-03-15 16:45:49,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:45:49,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:45:49,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:45:49,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:45:49,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:45:49" (1/2) ... [2022-03-15 16:45:49,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2096dafc and model type max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:45:49, skipping insertion in model container [2022-03-15 16:45:49,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:45:49" (2/2) ... [2022-03-15 16:45:49,539 INFO L111 eAbstractionObserver]: Analyzing ICFG max-fun-alt.wvr.bpl [2022-03-15 16:45:49,542 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:45:49,543 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:45:49,543 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:45:49,543 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:45:49,591 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-15 16:45:49,637 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:45:49,642 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 [2022-03-15 16:45:49,642 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 16:45:49,660 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-03-15 16:45:49,689 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:45:49,711 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:49,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:49,712 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:49,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1562983410, now seen corresponding path program 1 times [2022-03-15 16:45:49,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:49,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102114477] [2022-03-15 16:45:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:49,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:49,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:49,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102114477] [2022-03-15 16:45:49,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102114477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:45:49,857 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:45:49,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:45:49,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995909233] [2022-03-15 16:45:49,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:45:49,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:45:49,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:45:49,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:45:49,900 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:49,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:49,947 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-03-15 16:45:49,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:45:49,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:45:49,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:49,957 INFO L225 Difference]: With dead ends: 217 [2022-03-15 16:45:49,957 INFO L226 Difference]: Without dead ends: 202 [2022-03-15 16:45:49,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:45:49,961 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:49,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:45:49,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-15 16:45:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-03-15 16:45:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-03-15 16:45:50,024 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-03-15 16:45:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:50,025 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-03-15 16:45:50,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-03-15 16:45:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:45:50,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:50,027 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] [2022-03-15 16:45:50,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:45:50,027 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:50,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1322843154, now seen corresponding path program 1 times [2022-03-15 16:45:50,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:50,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650646876] [2022-03-15 16:45:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:50,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:50,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:50,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650646876] [2022-03-15 16:45:50,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650646876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:45:50,070 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:45:50,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:45:50,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959264248] [2022-03-15 16:45:50,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:45:50,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:45:50,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:50,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:45:50,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:45:50,072 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:50,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:50,124 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-03-15 16:45:50,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:45:50,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:45:50,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:50,126 INFO L225 Difference]: With dead ends: 158 [2022-03-15 16:45:50,126 INFO L226 Difference]: Without dead ends: 158 [2022-03-15 16:45:50,126 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 [2022-03-15 16:45:50,127 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:50,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:45:50,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-15 16:45:50,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-03-15 16:45:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-03-15 16:45:50,146 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-03-15 16:45:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:50,146 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-03-15 16:45:50,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-03-15 16:45:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:45:50,148 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:50,148 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] [2022-03-15 16:45:50,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:45:50,148 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:50,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:50,149 INFO L85 PathProgramCache]: Analyzing trace with hash 286241452, now seen corresponding path program 1 times [2022-03-15 16:45:50,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:50,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538936957] [2022-03-15 16:45:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:50,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:50,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:50,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538936957] [2022-03-15 16:45:50,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538936957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:45:50,201 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:45:50,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:45:50,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114069533] [2022-03-15 16:45:50,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:45:50,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:45:50,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:50,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:45:50,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:45:50,202 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:50,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:50,262 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-03-15 16:45:50,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:45:50,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:45:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:50,267 INFO L225 Difference]: With dead ends: 183 [2022-03-15 16:45:50,267 INFO L226 Difference]: Without dead ends: 183 [2022-03-15 16:45:50,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:45:50,269 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 76 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:50,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:45:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-15 16:45:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-03-15 16:45:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-03-15 16:45:50,285 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-03-15 16:45:50,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:50,285 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-03-15 16:45:50,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-03-15 16:45:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:45:50,286 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:50,287 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] [2022-03-15 16:45:50,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 16:45:50,287 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:50,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:50,288 INFO L85 PathProgramCache]: Analyzing trace with hash -867206516, now seen corresponding path program 1 times [2022-03-15 16:45:50,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:50,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917985930] [2022-03-15 16:45:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:50,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:50,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:50,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917985930] [2022-03-15 16:45:50,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917985930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:50,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740013161] [2022-03-15 16:45:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:50,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:50,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:50,638 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:50,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:45:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:50,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:45:50,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:51,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:51,075 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 45 treesize of output 33 [2022-03-15 16:45:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:51,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:51,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:51,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-03-15 16:45:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:51,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740013161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:51,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:51,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:45:51,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995237819] [2022-03-15 16:45:51,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:51,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 16:45:51,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:51,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 16:45:51,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:45:51,474 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:51,765 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-03-15 16:45:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:45:51,765 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:45:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:51,768 INFO L225 Difference]: With dead ends: 366 [2022-03-15 16:45:51,768 INFO L226 Difference]: Without dead ends: 351 [2022-03-15 16:45:51,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:45:51,769 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 197 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:51,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 61 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:45:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-15 16:45:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-03-15 16:45:51,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:51,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-03-15 16:45:51,785 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-03-15 16:45:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:51,786 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-03-15 16:45:51,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:51,786 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-03-15 16:45:51,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:45:51,791 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:51,791 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] [2022-03-15 16:45:51,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:51,991 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 [2022-03-15 16:45:51,992 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:51,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:51,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1035015608, now seen corresponding path program 2 times [2022-03-15 16:45:51,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:51,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217278878] [2022-03-15 16:45:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:51,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:52,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:52,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217278878] [2022-03-15 16:45:52,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217278878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:52,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344133077] [2022-03-15 16:45:52,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:45:52,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:52,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:52,149 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:52,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:45:52,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:45:52,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:52,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:45:52,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:52,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:52,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-03-15 16:45:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:52,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:52,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:52,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-03-15 16:45:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:52,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344133077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:52,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:52,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-03-15 16:45:52,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938264944] [2022-03-15 16:45:52,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:52,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 16:45:52,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:52,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 16:45:52,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:45:52,976 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-03-15 16:45:53,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:53,886 INFO L93 Difference]: Finished difference Result 508 states and 1467 transitions. [2022-03-15 16:45:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:45:53,886 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 22 [2022-03-15 16:45:53,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:53,889 INFO L225 Difference]: With dead ends: 508 [2022-03-15 16:45:53,889 INFO L226 Difference]: Without dead ends: 493 [2022-03-15 16:45:53,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:45:53,890 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 296 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:53,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 129 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:45:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-03-15 16:45:53,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 229. [2022-03-15 16:45:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:53,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-03-15 16:45:53,898 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-03-15 16:45:53,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:53,899 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-03-15 16:45:53,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-03-15 16:45:53,899 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-03-15 16:45:53,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:45:53,900 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:53,900 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] [2022-03-15 16:45:53,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:54,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:54,100 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:54,101 INFO L85 PathProgramCache]: Analyzing trace with hash -736242160, now seen corresponding path program 3 times [2022-03-15 16:45:54,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:54,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808484104] [2022-03-15 16:45:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:54,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:54,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:54,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808484104] [2022-03-15 16:45:54,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808484104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:54,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545303452] [2022-03-15 16:45:54,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:45:54,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:54,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:54,237 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:54,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:45:54,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:45:54,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:54,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 16:45:54,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:54,414 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 43 treesize of output 31 [2022-03-15 16:45:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:54,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:54,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:54,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-03-15 16:45:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:54,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545303452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:54,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:54,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 16:45:54,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549834533] [2022-03-15 16:45:54,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:54,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:45:54,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:54,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:45:54,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:45:54,654 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:54,976 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-03-15 16:45:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:45:54,977 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:45:54,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:54,978 INFO L225 Difference]: With dead ends: 418 [2022-03-15 16:45:54,979 INFO L226 Difference]: Without dead ends: 403 [2022-03-15 16:45:54,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:45:54,979 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:54,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 115 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:45:54,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-15 16:45:54,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-03-15 16:45:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-03-15 16:45:54,986 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-03-15 16:45:54,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:54,986 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-03-15 16:45:54,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-03-15 16:45:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:45:54,987 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:54,987 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] [2022-03-15 16:45:55,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:55,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:55,216 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:55,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:55,216 INFO L85 PathProgramCache]: Analyzing trace with hash 834583440, now seen corresponding path program 4 times [2022-03-15 16:45:55,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:55,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325591627] [2022-03-15 16:45:55,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:55,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:55,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:55,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325591627] [2022-03-15 16:45:55,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325591627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:55,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287244177] [2022-03-15 16:45:55,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:45:55,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:55,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:55,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:55,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:45:55,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:45:55,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:55,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:45:55,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:55,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:55,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-03-15 16:45:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:55,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:55,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:55,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-03-15 16:45:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:55,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287244177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:55,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:55,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 16:45:55,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012303092] [2022-03-15 16:45:55,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:55,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:45:55,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:55,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:45:55,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:45:55,968 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:56,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:56,247 INFO L93 Difference]: Finished difference Result 381 states and 1109 transitions. [2022-03-15 16:45:56,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:45:56,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:45:56,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:56,249 INFO L225 Difference]: With dead ends: 381 [2022-03-15 16:45:56,249 INFO L226 Difference]: Without dead ends: 366 [2022-03-15 16:45:56,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:45:56,250 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:56,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 127 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 303 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-03-15 16:45:56,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-15 16:45:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 250. [2022-03-15 16:45:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9437751004016066) internal successors, (733), 249 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 733 transitions. [2022-03-15 16:45:56,255 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 733 transitions. Word has length 22 [2022-03-15 16:45:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:56,256 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 733 transitions. [2022-03-15 16:45:56,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 733 transitions. [2022-03-15 16:45:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:45:56,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:56,256 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] [2022-03-15 16:45:56,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:56,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:56,457 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:56,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:56,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1412835854, now seen corresponding path program 5 times [2022-03-15 16:45:56,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:56,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692737691] [2022-03-15 16:45:56,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:56,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:56,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:56,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692737691] [2022-03-15 16:45:56,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692737691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:56,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197852540] [2022-03-15 16:45:56,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:45:56,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:56,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:56,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:56,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:45:56,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:45:56,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:56,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:45:56,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:56,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:56,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-03-15 16:45:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:57,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:57,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:57,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-03-15 16:45:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:57,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197852540] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:57,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:57,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-03-15 16:45:57,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720388335] [2022-03-15 16:45:57,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:57,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:45:57,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:57,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:45:57,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:45:57,552 INFO L87 Difference]: Start difference. First operand 250 states and 733 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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) [2022-03-15 16:46:01,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:01,838 INFO L93 Difference]: Finished difference Result 1120 states and 3300 transitions. [2022-03-15 16:46:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 16:46:01,838 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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 22 [2022-03-15 16:46:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:01,843 INFO L225 Difference]: With dead ends: 1120 [2022-03-15 16:46:01,843 INFO L226 Difference]: Without dead ends: 1090 [2022-03-15 16:46:01,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2469 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1386, Invalid=5420, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 16:46:01,847 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 453 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:01,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 337 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1002 Invalid, 0 Unknown, 288 Unchecked, 0.6s Time] [2022-03-15 16:46:01,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-03-15 16:46:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 261. [2022-03-15 16:46:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.019230769230769) internal successors, (785), 260 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 785 transitions. [2022-03-15 16:46:01,858 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 785 transitions. Word has length 22 [2022-03-15 16:46:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:01,858 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 785 transitions. [2022-03-15 16:46:01,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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) [2022-03-15 16:46:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 785 transitions. [2022-03-15 16:46:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:46:01,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:01,860 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] [2022-03-15 16:46:01,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:02,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:02,076 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:02,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:02,076 INFO L85 PathProgramCache]: Analyzing trace with hash 151290546, now seen corresponding path program 6 times [2022-03-15 16:46:02,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:02,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451898975] [2022-03-15 16:46:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:02,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:02,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:02,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451898975] [2022-03-15 16:46:02,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451898975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:02,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542759813] [2022-03-15 16:46:02,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:46:02,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:02,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:02,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:02,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:46:02,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:46:02,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:02,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:46:02,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:02,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:02,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-03-15 16:46:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:02,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:02,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:02,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-03-15 16:46:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:02,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542759813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:02,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:02,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-03-15 16:46:02,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494461819] [2022-03-15 16:46:02,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:02,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 16:46:02,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:02,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 16:46:02,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:46:02,827 INFO L87 Difference]: Start difference. First operand 261 states and 785 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:03,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:03,648 INFO L93 Difference]: Finished difference Result 585 states and 1722 transitions. [2022-03-15 16:46:03,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:46:03,648 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:46:03,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:03,653 INFO L225 Difference]: With dead ends: 585 [2022-03-15 16:46:03,653 INFO L226 Difference]: Without dead ends: 570 [2022-03-15 16:46:03,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:46:03,654 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 170 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:03,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 132 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:46:03,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-03-15 16:46:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 258. [2022-03-15 16:46:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9961089494163424) internal successors, (770), 257 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 770 transitions. [2022-03-15 16:46:03,661 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 770 transitions. Word has length 22 [2022-03-15 16:46:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:03,662 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 770 transitions. [2022-03-15 16:46:03,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:03,662 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 770 transitions. [2022-03-15 16:46:03,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:03,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:03,663 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] [2022-03-15 16:46:03,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:03,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:03,871 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:03,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:03,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1176864790, now seen corresponding path program 7 times [2022-03-15 16:46:03,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:03,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875617387] [2022-03-15 16:46:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:03,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:03,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:03,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875617387] [2022-03-15 16:46:03,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875617387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:03,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531263417] [2022-03-15 16:46:03,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:46:03,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:03,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:03,915 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:03,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:46:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:03,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:03,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:04,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:04,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531263417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:04,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:04,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:46:04,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128518526] [2022-03-15 16:46:04,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:04,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:46:04,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:04,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:46:04,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:46:04,104 INFO L87 Difference]: Start difference. First operand 258 states and 770 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:04,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:04,826 INFO L93 Difference]: Finished difference Result 1123 states and 3194 transitions. [2022-03-15 16:46:04,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:46:04,826 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:04,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:04,830 INFO L225 Difference]: With dead ends: 1123 [2022-03-15 16:46:04,830 INFO L226 Difference]: Without dead ends: 1123 [2022-03-15 16:46:04,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:46:04,832 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 302 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:04,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 187 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:46:04,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-03-15 16:46:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 322. [2022-03-15 16:46:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.196261682242991) internal successors, (1026), 321 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1026 transitions. [2022-03-15 16:46:04,843 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1026 transitions. Word has length 24 [2022-03-15 16:46:04,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:04,843 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1026 transitions. [2022-03-15 16:46:04,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:04,844 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1026 transitions. [2022-03-15 16:46:04,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:04,844 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:04,845 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] [2022-03-15 16:46:04,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:05,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:05,059 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:05,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:05,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2141783662, now seen corresponding path program 8 times [2022-03-15 16:46:05,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:05,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026981889] [2022-03-15 16:46:05,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:05,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:05,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:05,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026981889] [2022-03-15 16:46:05,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026981889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:05,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379801826] [2022-03-15 16:46:05,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:46:05,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:05,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:05,113 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:05,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:46:05,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:46:05,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:05,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:05,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:05,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:05,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379801826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:05,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:05,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:46:05,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699446829] [2022-03-15 16:46:05,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:05,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:46:05,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:05,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:46:05,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:46:05,335 INFO L87 Difference]: Start difference. First operand 322 states and 1026 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-03-15 16:46:07,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:07,091 INFO L93 Difference]: Finished difference Result 1814 states and 5087 transitions. [2022-03-15 16:46:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-15 16:46:07,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 24 [2022-03-15 16:46:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:07,100 INFO L225 Difference]: With dead ends: 1814 [2022-03-15 16:46:07,100 INFO L226 Difference]: Without dead ends: 1814 [2022-03-15 16:46:07,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 16:46:07,104 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 435 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:07,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 342 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:46:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-03-15 16:46:07,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 315. [2022-03-15 16:46:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-03-15 16:46:07,135 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-03-15 16:46:07,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:07,135 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-03-15 16:46:07,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-03-15 16:46:07,135 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-03-15 16:46:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:07,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:07,137 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] [2022-03-15 16:46:07,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:07,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-15 16:46:07,352 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:07,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:07,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1586231554, now seen corresponding path program 9 times [2022-03-15 16:46:07,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:07,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565125704] [2022-03-15 16:46:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:07,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:07,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:07,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565125704] [2022-03-15 16:46:07,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565125704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:07,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514534781] [2022-03-15 16:46:07,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:46:07,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:07,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:07,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:07,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:46:07,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:46:07,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:07,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:07,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:07,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:07,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514534781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:07,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:07,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:46:07,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794868988] [2022-03-15 16:46:07,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:07,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:46:07,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:07,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:46:07,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:46:07,629 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-03-15 16:46:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:08,481 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-03-15 16:46:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:46:08,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 24 [2022-03-15 16:46:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:08,486 INFO L225 Difference]: With dead ends: 1470 [2022-03-15 16:46:08,486 INFO L226 Difference]: Without dead ends: 1470 [2022-03-15 16:46:08,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:46:08,488 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 426 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:08,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 233 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:46:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-15 16:46:08,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-03-15 16:46:08,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-03-15 16:46:08,499 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-03-15 16:46:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:08,499 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-03-15 16:46:08,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-03-15 16:46:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-03-15 16:46:08,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:08,500 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:08,500 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] [2022-03-15 16:46:08,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:08,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:08,727 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:08,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:08,728 INFO L85 PathProgramCache]: Analyzing trace with hash -650092882, now seen corresponding path program 1 times [2022-03-15 16:46:08,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:08,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643841631] [2022-03-15 16:46:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:08,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:08,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:08,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643841631] [2022-03-15 16:46:08,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643841631] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:08,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17267067] [2022-03-15 16:46:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:08,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:08,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:08,759 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:08,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:46:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:08,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:46:08,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:08,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:08,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17267067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:08,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:08,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-15 16:46:08,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229984157] [2022-03-15 16:46:08,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:08,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:46:08,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:08,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:46:08,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:46:08,899 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:09,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:09,045 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-03-15 16:46:09,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:46:09,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:09,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:09,057 INFO L225 Difference]: With dead ends: 685 [2022-03-15 16:46:09,057 INFO L226 Difference]: Without dead ends: 679 [2022-03-15 16:46:09,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:46:09,059 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:09,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 52 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:46:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-15 16:46:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-03-15 16:46:09,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:09,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-03-15 16:46:09,072 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-03-15 16:46:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:09,072 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-03-15 16:46:09,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:09,072 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-03-15 16:46:09,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:09,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:09,073 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] [2022-03-15 16:46:09,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:09,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 16:46:09,282 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:09,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1087061590, now seen corresponding path program 10 times [2022-03-15 16:46:09,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:09,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674056816] [2022-03-15 16:46:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:09,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:09,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:09,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674056816] [2022-03-15 16:46:09,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674056816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:09,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070088997] [2022-03-15 16:46:09,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:46:09,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:09,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:09,321 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:09,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:46:09,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:46:09,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:09,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:09,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:09,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:09,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070088997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:09,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:09,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 16:46:09,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750538956] [2022-03-15 16:46:09,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:09,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:46:09,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:09,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:46:09,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:46:09,502 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:09,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:09,781 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-03-15 16:46:09,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:46:09,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:09,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:09,786 INFO L225 Difference]: With dead ends: 1159 [2022-03-15 16:46:09,786 INFO L226 Difference]: Without dead ends: 1111 [2022-03-15 16:46:09,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:46:09,786 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 272 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:09,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 117 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:46:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-03-15 16:46:09,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-03-15 16:46:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-03-15 16:46:09,800 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-03-15 16:46:09,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:09,800 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-03-15 16:46:09,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:09,801 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-03-15 16:46:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:09,802 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:09,802 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] [2022-03-15 16:46:09,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:10,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 16:46:10,007 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:10,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:10,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1793018922, now seen corresponding path program 2 times [2022-03-15 16:46:10,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:10,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781140623] [2022-03-15 16:46:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:10,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:10,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:10,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781140623] [2022-03-15 16:46:10,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781140623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:10,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107539745] [2022-03-15 16:46:10,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:46:10,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:10,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:10,035 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:10,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:46:10,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:46:10,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:10,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:46:10,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:10,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:10,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107539745] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:10,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:10,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-15 16:46:10,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132987921] [2022-03-15 16:46:10,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:10,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:46:10,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:10,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:46:10,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:46:10,182 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:10,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:10,369 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-03-15 16:46:10,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:46:10,369 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:10,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:10,373 INFO L225 Difference]: With dead ends: 1267 [2022-03-15 16:46:10,373 INFO L226 Difference]: Without dead ends: 1267 [2022-03-15 16:46:10,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:46:10,374 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 195 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:10,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 69 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:46:10,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-15 16:46:10,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-03-15 16:46:10,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-03-15 16:46:10,388 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-03-15 16:46:10,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:10,388 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-03-15 16:46:10,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:10,388 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-03-15 16:46:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:10,389 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:10,390 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] [2022-03-15 16:46:10,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:10,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 16:46:10,606 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:10,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:10,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1155266808, now seen corresponding path program 11 times [2022-03-15 16:46:10,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:10,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689919147] [2022-03-15 16:46:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:10,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:10,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:10,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689919147] [2022-03-15 16:46:10,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689919147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:10,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629698117] [2022-03-15 16:46:10,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:46:10,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:10,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:10,644 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:10,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:46:10,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:46:10,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:10,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:10,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:10,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:10,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629698117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:10,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:10,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:46:10,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787398379] [2022-03-15 16:46:10,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:10,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:46:10,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:10,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:46:10,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:46:10,800 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:11,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:11,290 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-03-15 16:46:11,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:46:11,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:11,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:11,299 INFO L225 Difference]: With dead ends: 2268 [2022-03-15 16:46:11,299 INFO L226 Difference]: Without dead ends: 2268 [2022-03-15 16:46:11,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:46:11,300 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 237 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:11,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 194 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:46:11,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-03-15 16:46:11,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-03-15 16:46:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-03-15 16:46:11,324 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-03-15 16:46:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:11,324 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-03-15 16:46:11,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-03-15 16:46:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:11,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:11,326 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] [2022-03-15 16:46:11,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:11,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-15 16:46:11,527 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:11,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1940180902, now seen corresponding path program 12 times [2022-03-15 16:46:11,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:11,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479180239] [2022-03-15 16:46:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:11,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:11,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:11,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479180239] [2022-03-15 16:46:11,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479180239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:11,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883785687] [2022-03-15 16:46:11,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:46:11,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:11,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:11,561 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:11,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:46:11,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:46:11,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:11,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:11,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:11,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:11,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883785687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:11,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:11,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:46:11,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678503116] [2022-03-15 16:46:11,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:11,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:46:11,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:46:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:46:11,713 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:12,331 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-03-15 16:46:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:46:12,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:12,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:12,340 INFO L225 Difference]: With dead ends: 2256 [2022-03-15 16:46:12,340 INFO L226 Difference]: Without dead ends: 2256 [2022-03-15 16:46:12,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:46:12,344 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 218 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:12,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 218 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:46:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-03-15 16:46:12,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-03-15 16:46:12,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-03-15 16:46:12,367 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-03-15 16:46:12,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:12,368 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-03-15 16:46:12,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-03-15 16:46:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:12,370 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:12,370 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] [2022-03-15 16:46:12,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:12,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:12,583 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1966730932, now seen corresponding path program 13 times [2022-03-15 16:46:12,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:12,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409912172] [2022-03-15 16:46:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:12,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:12,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:12,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409912172] [2022-03-15 16:46:12,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409912172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:12,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521721703] [2022-03-15 16:46:12,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:46:12,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:12,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:12,649 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:12,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:46:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:12,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:12,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:12,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:12,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521721703] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:12,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:12,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-15 16:46:12,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819377824] [2022-03-15 16:46:12,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:12,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:46:12,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:12,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:46:12,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:46:12,792 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:13,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:13,060 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-03-15 16:46:13,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:46:13,061 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:13,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:13,070 INFO L225 Difference]: With dead ends: 1611 [2022-03-15 16:46:13,070 INFO L226 Difference]: Without dead ends: 1611 [2022-03-15 16:46:13,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:46:13,071 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 204 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:13,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 145 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:46:13,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-03-15 16:46:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-03-15 16:46:13,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-03-15 16:46:13,091 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-03-15 16:46:13,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:13,091 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-03-15 16:46:13,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:13,091 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-03-15 16:46:13,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:13,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:13,093 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] [2022-03-15 16:46:13,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:13,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 16:46:13,300 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:13,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:13,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1895359760, now seen corresponding path program 14 times [2022-03-15 16:46:13,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:13,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697331712] [2022-03-15 16:46:13,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:13,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:13,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:13,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697331712] [2022-03-15 16:46:13,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697331712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:13,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356946961] [2022-03-15 16:46:13,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:46:13,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:13,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:13,339 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:13,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:46:13,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:46:13,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:13,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:13,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:13,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:13,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356946961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:13,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:13,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:46:13,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102047673] [2022-03-15 16:46:13,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:13,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:46:13,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:13,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:46:13,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:46:13,498 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:13,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:13,968 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-03-15 16:46:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:46:13,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:13,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:13,973 INFO L225 Difference]: With dead ends: 2408 [2022-03-15 16:46:13,974 INFO L226 Difference]: Without dead ends: 2404 [2022-03-15 16:46:13,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:46:13,974 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 256 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:13,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 153 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:46:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-03-15 16:46:13,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-03-15 16:46:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-03-15 16:46:14,000 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-03-15 16:46:14,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:14,000 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-03-15 16:46:14,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-03-15 16:46:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:14,002 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:14,002 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] [2022-03-15 16:46:14,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:14,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:14,202 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:14,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:14,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2029990096, now seen corresponding path program 15 times [2022-03-15 16:46:14,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:14,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000862221] [2022-03-15 16:46:14,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:14,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:14,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:14,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000862221] [2022-03-15 16:46:14,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000862221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:14,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580636227] [2022-03-15 16:46:14,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:46:14,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:14,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:14,242 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:14,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:46:14,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:46:14,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:14,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:14,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:14,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:14,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580636227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:14,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:14,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:46:14,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743249401] [2022-03-15 16:46:14,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:14,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:46:14,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:14,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:46:14,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:46:14,446 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:15,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:15,345 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-03-15 16:46:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:46:15,345 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:15,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:15,354 INFO L225 Difference]: With dead ends: 3509 [2022-03-15 16:46:15,354 INFO L226 Difference]: Without dead ends: 3509 [2022-03-15 16:46:15,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:46:15,357 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 450 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:15,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 291 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:46:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-03-15 16:46:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-03-15 16:46:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:15,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-03-15 16:46:15,397 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-03-15 16:46:15,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:15,398 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-03-15 16:46:15,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:15,398 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-03-15 16:46:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:15,400 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:15,400 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] [2022-03-15 16:46:15,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:15,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:15,619 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:15,620 INFO L85 PathProgramCache]: Analyzing trace with hash -621938046, now seen corresponding path program 16 times [2022-03-15 16:46:15,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:15,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919764581] [2022-03-15 16:46:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:15,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:15,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:15,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919764581] [2022-03-15 16:46:15,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919764581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:15,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985185570] [2022-03-15 16:46:15,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:46:15,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:15,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:15,654 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:15,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:46:15,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:46:15,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:15,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:15,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:15,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:15,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985185570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:15,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:15,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:46:15,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296703418] [2022-03-15 16:46:15,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:15,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:46:15,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:15,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:46:15,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:46:15,842 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:16,950 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-03-15 16:46:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 16:46:16,950 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:16,958 INFO L225 Difference]: With dead ends: 3211 [2022-03-15 16:46:16,958 INFO L226 Difference]: Without dead ends: 3207 [2022-03-15 16:46:16,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 16:46:16,960 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 452 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:16,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 272 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:46:16,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-03-15 16:46:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-03-15 16:46:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-03-15 16:46:16,995 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-03-15 16:46:16,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:16,995 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-03-15 16:46:16,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-03-15 16:46:16,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:16,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:16,997 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] [2022-03-15 16:46:17,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:17,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:17,213 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:17,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:17,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1534223598, now seen corresponding path program 3 times [2022-03-15 16:46:17,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:17,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670649] [2022-03-15 16:46:17,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:17,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:17,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:17,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670649] [2022-03-15 16:46:17,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:17,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742251696] [2022-03-15 16:46:17,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:46:17,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:17,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:17,247 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:17,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:46:17,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:46:17,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:17,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:46:17,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:17,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:17,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742251696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:17,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:17,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-15 16:46:17,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563491228] [2022-03-15 16:46:17,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:17,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:46:17,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:17,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:46:17,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:46:17,379 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:17,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:17,548 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-03-15 16:46:17,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:46:17,548 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:17,551 INFO L225 Difference]: With dead ends: 1333 [2022-03-15 16:46:17,551 INFO L226 Difference]: Without dead ends: 1333 [2022-03-15 16:46:17,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:46:17,552 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:17,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 65 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:46:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-03-15 16:46:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-03-15 16:46:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-03-15 16:46:17,569 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-03-15 16:46:17,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:17,569 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-03-15 16:46:17,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:17,569 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-03-15 16:46:17,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:17,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:17,571 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] [2022-03-15 16:46:17,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:17,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:17,786 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:17,787 INFO L85 PathProgramCache]: Analyzing trace with hash -604023854, now seen corresponding path program 17 times [2022-03-15 16:46:17,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:17,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381251619] [2022-03-15 16:46:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:17,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:17,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:17,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381251619] [2022-03-15 16:46:17,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381251619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:17,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682243609] [2022-03-15 16:46:17,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:46:17,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:17,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:17,824 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:17,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:46:17,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:46:17,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:17,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:17,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:17,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:17,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682243609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:17,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:17,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-15 16:46:17,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68562315] [2022-03-15 16:46:17,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:17,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:46:17,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:17,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:46:17,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:46:17,947 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:18,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:18,270 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-03-15 16:46:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:46:18,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-03-15 16:46:18,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:18,275 INFO L225 Difference]: With dead ends: 2129 [2022-03-15 16:46:18,275 INFO L226 Difference]: Without dead ends: 2129 [2022-03-15 16:46:18,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:46:18,276 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 171 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:18,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 127 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:46:18,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-03-15 16:46:18,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-03-15 16:46:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:18,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-03-15 16:46:18,301 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-03-15 16:46:18,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:18,301 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-03-15 16:46:18,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:18,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-03-15 16:46:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:18,303 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:18,303 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] [2022-03-15 16:46:18,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:18,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-15 16:46:18,519 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:18,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:18,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1298655598, now seen corresponding path program 18 times [2022-03-15 16:46:18,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:18,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376319886] [2022-03-15 16:46:18,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:18,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:18,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:18,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376319886] [2022-03-15 16:46:18,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376319886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:18,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31408206] [2022-03-15 16:46:18,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:46:18,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:18,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:18,548 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:18,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:46:18,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:46:18,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:18,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:18,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:18,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:18,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31408206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:18,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:18,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:46:18,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921788555] [2022-03-15 16:46:18,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:18,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:46:18,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:18,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:46:18,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:46:18,673 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:19,017 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-03-15 16:46:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:46:19,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-03-15 16:46:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:19,022 INFO L225 Difference]: With dead ends: 2262 [2022-03-15 16:46:19,022 INFO L226 Difference]: Without dead ends: 2262 [2022-03-15 16:46:19,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:46:19,023 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 183 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:19,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 122 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:46:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-03-15 16:46:19,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-03-15 16:46:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-03-15 16:46:19,046 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-03-15 16:46:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:19,046 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-03-15 16:46:19,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:19,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-03-15 16:46:19,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:19,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:19,049 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] [2022-03-15 16:46:19,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:19,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-15 16:46:19,263 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:19,264 INFO L85 PathProgramCache]: Analyzing trace with hash 215632942, now seen corresponding path program 19 times [2022-03-15 16:46:19,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:19,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431169838] [2022-03-15 16:46:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:19,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:19,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:19,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431169838] [2022-03-15 16:46:19,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431169838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:19,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005275566] [2022-03-15 16:46:19,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:46:19,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:19,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:19,298 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:19,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:46:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:19,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:19,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:19,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:19,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005275566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:19,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:19,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-15 16:46:19,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656205890] [2022-03-15 16:46:19,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:19,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:46:19,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:19,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:46:19,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:46:19,445 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-03-15 16:46:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:19,691 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-03-15 16:46:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:46:19,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 24 [2022-03-15 16:46:19,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:19,694 INFO L225 Difference]: With dead ends: 1474 [2022-03-15 16:46:19,695 INFO L226 Difference]: Without dead ends: 1464 [2022-03-15 16:46:19,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:46:19,695 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 142 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:19,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 138 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:46:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-03-15 16:46:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-03-15 16:46:19,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-03-15 16:46:19,716 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-03-15 16:46:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:19,716 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-03-15 16:46:19,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-03-15 16:46:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-03-15 16:46:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:19,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:19,719 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] [2022-03-15 16:46:19,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:19,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:19,920 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:19,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:19,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1253834456, now seen corresponding path program 20 times [2022-03-15 16:46:19,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:19,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465861224] [2022-03-15 16:46:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:19,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:19,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:19,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465861224] [2022-03-15 16:46:19,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465861224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:19,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135634622] [2022-03-15 16:46:19,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:46:19,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:19,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:19,951 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:19,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:46:19,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:46:19,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:19,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:19,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:20,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:20,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135634622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:20,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:20,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:46:20,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026756651] [2022-03-15 16:46:20,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:20,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:46:20,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:20,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:46:20,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:46:20,082 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:20,332 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-03-15 16:46:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:46:20,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-03-15 16:46:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:20,337 INFO L225 Difference]: With dead ends: 2318 [2022-03-15 16:46:20,337 INFO L226 Difference]: Without dead ends: 2314 [2022-03-15 16:46:20,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:46:20,338 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 184 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:20,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 114 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:46:20,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-03-15 16:46:20,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-03-15 16:46:20,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-03-15 16:46:20,371 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-03-15 16:46:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:20,371 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-03-15 16:46:20,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:20,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-03-15 16:46:20,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:20,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:20,373 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] [2022-03-15 16:46:20,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:20,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:20,579 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:20,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1851171114, now seen corresponding path program 21 times [2022-03-15 16:46:20,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:20,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291046279] [2022-03-15 16:46:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:20,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:20,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:20,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291046279] [2022-03-15 16:46:20,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291046279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:20,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107904000] [2022-03-15 16:46:20,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:46:20,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:20,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:20,616 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:20,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:46:20,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:46:20,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:20,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:20,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:20,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:20,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107904000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:20,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:20,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-15 16:46:20,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401129734] [2022-03-15 16:46:20,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:20,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:46:20,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:20,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:46:20,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:46:20,762 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:21,062 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-03-15 16:46:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:46:21,062 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-03-15 16:46:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:21,066 INFO L225 Difference]: With dead ends: 2302 [2022-03-15 16:46:21,066 INFO L226 Difference]: Without dead ends: 2290 [2022-03-15 16:46:21,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:46:21,067 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:21,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 148 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:46:21,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-03-15 16:46:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-03-15 16:46:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-03-15 16:46:21,090 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-03-15 16:46:21,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:21,090 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-03-15 16:46:21,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-03-15 16:46:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:21,092 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:21,092 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] [2022-03-15 16:46:21,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:21,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-15 16:46:21,313 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:21,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:21,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1324750830, now seen corresponding path program 22 times [2022-03-15 16:46:21,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:21,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995990717] [2022-03-15 16:46:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:21,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:21,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:21,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995990717] [2022-03-15 16:46:21,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995990717] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:21,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512499584] [2022-03-15 16:46:21,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:46:21,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:21,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:21,350 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:21,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:46:21,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:46:21,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:21,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:21,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:21,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:21,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512499584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:21,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:21,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:46:21,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565930545] [2022-03-15 16:46:21,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:21,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:46:21,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:21,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:46:21,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:46:21,532 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-15 16:46:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:22,349 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-03-15 16:46:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:46:22,350 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 24 [2022-03-15 16:46:22,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:22,360 INFO L225 Difference]: With dead ends: 4760 [2022-03-15 16:46:22,360 INFO L226 Difference]: Without dead ends: 4760 [2022-03-15 16:46:22,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:46:22,361 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 470 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:22,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 222 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:46:22,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-03-15 16:46:22,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-03-15 16:46:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:22,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-03-15 16:46:22,412 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-03-15 16:46:22,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:22,412 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-03-15 16:46:22,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-15 16:46:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-03-15 16:46:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:22,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:22,415 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] [2022-03-15 16:46:22,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:22,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 16:46:22,631 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:22,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:22,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1891702910, now seen corresponding path program 23 times [2022-03-15 16:46:22,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:22,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955527623] [2022-03-15 16:46:22,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:22,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:22,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:22,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955527623] [2022-03-15 16:46:22,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955527623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:22,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390951538] [2022-03-15 16:46:22,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:46:22,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:22,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:22,669 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:22,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:46:22,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:46:22,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:22,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:22,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:22,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:22,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390951538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:22,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:22,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:46:22,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878979926] [2022-03-15 16:46:22,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:22,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:46:22,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:22,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:46:22,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:46:22,867 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-15 16:46:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:23,546 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-03-15 16:46:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:46:23,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 24 [2022-03-15 16:46:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:23,556 INFO L225 Difference]: With dead ends: 4260 [2022-03-15 16:46:23,556 INFO L226 Difference]: Without dead ends: 4260 [2022-03-15 16:46:23,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:46:23,560 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 359 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:23,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 205 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:46:23,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-03-15 16:46:23,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-03-15 16:46:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-03-15 16:46:23,608 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-03-15 16:46:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:23,608 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-03-15 16:46:23,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-15 16:46:23,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-03-15 16:46:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:23,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:23,611 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] [2022-03-15 16:46:23,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:23,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 16:46:23,830 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:23,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:23,830 INFO L85 PathProgramCache]: Analyzing trace with hash 719357052, now seen corresponding path program 24 times [2022-03-15 16:46:23,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:23,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891481420] [2022-03-15 16:46:23,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:23,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:23,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:23,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891481420] [2022-03-15 16:46:23,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891481420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:23,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453313389] [2022-03-15 16:46:23,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:46:23,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:23,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:23,870 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:23,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:46:23,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:46:23,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:23,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:23,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:23,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:24,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453313389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:24,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:24,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-15 16:46:24,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583082382] [2022-03-15 16:46:24,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:24,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:46:24,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:24,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:46:24,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:46:24,038 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:24,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:24,721 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-03-15 16:46:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:46:24,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:24,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:24,729 INFO L225 Difference]: With dead ends: 4602 [2022-03-15 16:46:24,729 INFO L226 Difference]: Without dead ends: 4602 [2022-03-15 16:46:24,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:46:24,730 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 306 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:24,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 202 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:46:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-03-15 16:46:24,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-03-15 16:46:24,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-03-15 16:46:24,765 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-03-15 16:46:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:24,765 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-03-15 16:46:24,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:24,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-03-15 16:46:24,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:24,768 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:24,768 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] [2022-03-15 16:46:24,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-15 16:46:24,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:24,995 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:24,996 INFO L85 PathProgramCache]: Analyzing trace with hash 800733140, now seen corresponding path program 25 times [2022-03-15 16:46:24,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:24,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623871526] [2022-03-15 16:46:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:24,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:25,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:25,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623871526] [2022-03-15 16:46:25,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623871526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:25,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258325860] [2022-03-15 16:46:25,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:46:25,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:25,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:25,028 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:25,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:46:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:25,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:25,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:25,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:25,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258325860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:25,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:25,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-15 16:46:25,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517437672] [2022-03-15 16:46:25,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:25,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:46:25,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:46:25,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:46:25,177 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:25,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:25,716 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-03-15 16:46:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:46:25,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:25,725 INFO L225 Difference]: With dead ends: 4348 [2022-03-15 16:46:25,725 INFO L226 Difference]: Without dead ends: 4344 [2022-03-15 16:46:25,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:46:25,726 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 402 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:25,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 166 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:46:25,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-03-15 16:46:25,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-03-15 16:46:25,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:25,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-15 16:46:25,778 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-15 16:46:25,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:25,778 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-15 16:46:25,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:25,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-15 16:46:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:25,780 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:25,780 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] [2022-03-15 16:46:25,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:25,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:25,996 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:25,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1731390356, now seen corresponding path program 26 times [2022-03-15 16:46:25,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:25,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603707508] [2022-03-15 16:46:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:25,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:26,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:26,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603707508] [2022-03-15 16:46:26,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603707508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:26,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883670906] [2022-03-15 16:46:26,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:46:26,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:26,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:26,031 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:26,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:46:26,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:46:26,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:26,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:26,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:26,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:26,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883670906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:26,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:26,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:46:26,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766161032] [2022-03-15 16:46:26,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:26,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:46:26,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:46:26,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:46:26,203 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:26,801 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-03-15 16:46:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:46:26,802 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:26,809 INFO L225 Difference]: With dead ends: 4035 [2022-03-15 16:46:26,809 INFO L226 Difference]: Without dead ends: 4035 [2022-03-15 16:46:26,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:46:26,810 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 437 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:26,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 239 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:46:26,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-03-15 16:46:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-03-15 16:46:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-03-15 16:46:26,850 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-03-15 16:46:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:26,850 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-03-15 16:46:26,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-03-15 16:46:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:26,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:26,853 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] [2022-03-15 16:46:26,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:27,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:27,075 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:27,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:27,076 INFO L85 PathProgramCache]: Analyzing trace with hash -920537786, now seen corresponding path program 27 times [2022-03-15 16:46:27,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:27,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527954194] [2022-03-15 16:46:27,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:27,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:27,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:27,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527954194] [2022-03-15 16:46:27,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527954194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:27,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273417795] [2022-03-15 16:46:27,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:46:27,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:27,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:27,112 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:27,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:46:27,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:46:27,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:27,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:27,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:27,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:46:27,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273417795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:27,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:27,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:46:27,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136065326] [2022-03-15 16:46:27,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:27,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:46:27,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:27,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:46:27,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:46:27,284 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:27,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:27,967 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-03-15 16:46:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:46:27,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:27,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:27,976 INFO L225 Difference]: With dead ends: 3794 [2022-03-15 16:46:27,976 INFO L226 Difference]: Without dead ends: 3790 [2022-03-15 16:46:27,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:46:27,977 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 433 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:27,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 168 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:46:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-03-15 16:46:28,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-03-15 16:46:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-15 16:46:28,020 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-15 16:46:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:28,020 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-15 16:46:28,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-15 16:46:28,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:28,022 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:28,023 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] [2022-03-15 16:46:28,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-15 16:46:28,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-15 16:46:28,223 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:28,223 INFO L85 PathProgramCache]: Analyzing trace with hash 82890198, now seen corresponding path program 28 times [2022-03-15 16:46:28,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:28,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146446462] [2022-03-15 16:46:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:28,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:28,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:28,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146446462] [2022-03-15 16:46:28,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146446462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:28,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344728635] [2022-03-15 16:46:28,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:46:28,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:28,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:28,259 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:28,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:46:28,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:46:28,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:28,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:28,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:28,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:28,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344728635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:28,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:28,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:46:28,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894733102] [2022-03-15 16:46:28,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:28,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:46:28,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:28,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:46:28,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:46:28,400 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-15 16:46:29,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:29,007 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-03-15 16:46:29,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:46:29,007 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-03-15 16:46:29,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:29,014 INFO L225 Difference]: With dead ends: 3978 [2022-03-15 16:46:29,014 INFO L226 Difference]: Without dead ends: 3978 [2022-03-15 16:46:29,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:46:29,015 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 285 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:29,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 162 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:46:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-03-15 16:46:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-03-15 16:46:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-03-15 16:46:29,052 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-03-15 16:46:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:29,053 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-03-15 16:46:29,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-15 16:46:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-03-15 16:46:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:29,056 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:29,056 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] [2022-03-15 16:46:29,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:29,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:29,272 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash 164266286, now seen corresponding path program 29 times [2022-03-15 16:46:29,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:29,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708202157] [2022-03-15 16:46:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:29,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:29,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:29,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708202157] [2022-03-15 16:46:29,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708202157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:29,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706512999] [2022-03-15 16:46:29,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:46:29,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:29,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:29,312 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:29,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:46:29,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:46:29,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:29,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:29,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:29,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:29,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706512999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:29,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:29,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:46:29,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344833246] [2022-03-15 16:46:29,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:29,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:46:29,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:29,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:46:29,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:46:29,448 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-15 16:46:29,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:29,936 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-03-15 16:46:29,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:46:29,937 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-03-15 16:46:29,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:29,943 INFO L225 Difference]: With dead ends: 3706 [2022-03-15 16:46:29,943 INFO L226 Difference]: Without dead ends: 3702 [2022-03-15 16:46:29,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:46:29,943 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 231 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:29,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 149 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:46:29,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-03-15 16:46:29,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-03-15 16:46:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-03-15 16:46:29,976 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-03-15 16:46:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:29,977 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-03-15 16:46:29,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-15 16:46:29,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-03-15 16:46:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:29,979 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:29,979 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] [2022-03-15 16:46:29,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:30,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:30,180 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:30,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:30,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1350825686, now seen corresponding path program 30 times [2022-03-15 16:46:30,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:30,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642872478] [2022-03-15 16:46:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:30,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:30,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:30,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642872478] [2022-03-15 16:46:30,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642872478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:30,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425800191] [2022-03-15 16:46:30,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:46:30,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:30,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:30,217 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:30,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:46:30,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:46:30,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:30,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:30,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:30,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:30,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425800191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:30,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:30,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:46:30,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554040796] [2022-03-15 16:46:30,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:30,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:46:30,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:30,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:46:30,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:46:30,347 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-15 16:46:30,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:30,863 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-03-15 16:46:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:46:30,863 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-03-15 16:46:30,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:30,870 INFO L225 Difference]: With dead ends: 4114 [2022-03-15 16:46:30,870 INFO L226 Difference]: Without dead ends: 4102 [2022-03-15 16:46:30,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:46:30,870 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 284 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:30,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 195 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:46:30,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-03-15 16:46:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-03-15 16:46:30,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-03-15 16:46:30,916 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-03-15 16:46:30,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:30,916 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-03-15 16:46:30,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-15 16:46:30,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-03-15 16:46:30,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:30,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:30,919 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] [2022-03-15 16:46:30,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:31,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-15 16:46:31,135 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:31,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:31,136 INFO L85 PathProgramCache]: Analyzing trace with hash 246301030, now seen corresponding path program 31 times [2022-03-15 16:46:31,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:31,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929734907] [2022-03-15 16:46:31,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:31,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:31,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:31,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929734907] [2022-03-15 16:46:31,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929734907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:31,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631613748] [2022-03-15 16:46:31,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:46:31,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:31,177 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:31,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:46:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:31,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:31,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:31,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:31,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631613748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:31,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:31,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:46:31,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940503761] [2022-03-15 16:46:31,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:31,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:46:31,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:31,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:46:31,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:46:31,348 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:31,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:31,962 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-03-15 16:46:31,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:46:31,962 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:31,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:31,969 INFO L225 Difference]: With dead ends: 3694 [2022-03-15 16:46:31,969 INFO L226 Difference]: Without dead ends: 3694 [2022-03-15 16:46:31,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:46:31,970 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 321 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:31,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 297 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:46:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-03-15 16:46:32,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-03-15 16:46:32,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-03-15 16:46:32,010 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-03-15 16:46:32,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:32,010 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-03-15 16:46:32,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:32,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-03-15 16:46:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:32,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:32,013 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] [2022-03-15 16:46:32,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:32,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 16:46:32,230 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:32,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:32,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1889340184, now seen corresponding path program 32 times [2022-03-15 16:46:32,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:32,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623397920] [2022-03-15 16:46:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:32,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:32,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:32,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623397920] [2022-03-15 16:46:32,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623397920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:32,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112898350] [2022-03-15 16:46:32,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:46:32,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:32,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:32,273 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:32,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:46:32,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:46:32,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:32,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:32,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:32,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:32,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112898350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:32,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:32,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:46:32,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047069463] [2022-03-15 16:46:32,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:32,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:46:32,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:32,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:46:32,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:46:32,442 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:33,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:33,200 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-03-15 16:46:33,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:46:33,200 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:33,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:33,207 INFO L225 Difference]: With dead ends: 3420 [2022-03-15 16:46:33,207 INFO L226 Difference]: Without dead ends: 3416 [2022-03-15 16:46:33,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:46:33,208 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 358 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:33,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 222 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:46:33,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-03-15 16:46:33,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-03-15 16:46:33,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-03-15 16:46:33,244 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-03-15 16:46:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:33,244 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-03-15 16:46:33,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-03-15 16:46:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:46:33,247 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:33,247 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] [2022-03-15 16:46:33,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:33,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-15 16:46:33,448 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:33,448 INFO L85 PathProgramCache]: Analyzing trace with hash 621883006, now seen corresponding path program 33 times [2022-03-15 16:46:33,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:33,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902853736] [2022-03-15 16:46:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:33,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:33,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902853736] [2022-03-15 16:46:33,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902853736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:33,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584595308] [2022-03-15 16:46:33,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:46:33,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:33,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:33,485 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:33,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:46:33,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:46:33,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:33,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:46:33,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:33,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:33,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584595308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:33,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:33,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:46:33,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925036812] [2022-03-15 16:46:33,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:33,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:46:33,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:33,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:46:33,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:46:33,661 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:34,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:34,253 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-03-15 16:46:34,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:46:34,253 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:46:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:34,259 INFO L225 Difference]: With dead ends: 3256 [2022-03-15 16:46:34,259 INFO L226 Difference]: Without dead ends: 3244 [2022-03-15 16:46:34,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:46:34,260 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 231 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:34,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 211 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:46:34,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-03-15 16:46:34,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-03-15 16:46:34,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-03-15 16:46:34,293 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-03-15 16:46:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:34,293 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-03-15 16:46:34,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-03-15 16:46:34,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:46:34,296 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:34,296 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] [2022-03-15 16:46:34,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-15 16:46:34,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 16:46:34,497 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:34,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:34,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1878950772, now seen corresponding path program 4 times [2022-03-15 16:46:34,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:34,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327012497] [2022-03-15 16:46:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:34,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:34,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:34,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327012497] [2022-03-15 16:46:34,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327012497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:34,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383694416] [2022-03-15 16:46:34,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:46:34,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:34,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:34,793 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:34,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:46:34,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:46:34,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:34,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:46:34,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:35,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:35,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:35,438 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 109 treesize of output 75 [2022-03-15 16:46:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:35,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:36,062 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:46:36,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 161 [2022-03-15 16:46:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:37,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383694416] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:37,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:37,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-15 16:46:37,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203348396] [2022-03-15 16:46:37,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:37,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:46:37,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:37,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:46:37,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:46:37,071 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:41,524 INFO L93 Difference]: Finished difference Result 3630 states and 11850 transitions. [2022-03-15 16:46:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:46:41,525 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:46:41,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:41,531 INFO L225 Difference]: With dead ends: 3630 [2022-03-15 16:46:41,531 INFO L226 Difference]: Without dead ends: 3585 [2022-03-15 16:46:41,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=712, Invalid=4258, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:46:41,532 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 337 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1912 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:41,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 355 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1912 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:46:41,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2022-03-15 16:46:41,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 1767. [2022-03-15 16:46:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 3.5781426953567386) internal successors, (6319), 1766 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:41,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 6319 transitions. [2022-03-15 16:46:41,566 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 6319 transitions. Word has length 26 [2022-03-15 16:46:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:41,566 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 6319 transitions. [2022-03-15 16:46:41,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 6319 transitions. [2022-03-15 16:46:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:46:41,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:41,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:46:41,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-15 16:46:41,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 16:46:41,776 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:41,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:41,777 INFO L85 PathProgramCache]: Analyzing trace with hash 387618508, now seen corresponding path program 5 times [2022-03-15 16:46:41,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:41,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426244584] [2022-03-15 16:46:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:41,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:42,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:42,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426244584] [2022-03-15 16:46:42,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426244584] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:42,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218338758] [2022-03-15 16:46:42,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:46:42,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:42,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:42,143 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:42,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:46:42,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:46:42,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:42,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:46:42,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:42,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:42,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:42,681 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 109 treesize of output 75 [2022-03-15 16:46:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:42,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:43,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:43,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:43,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-03-15 16:46:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:44,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218338758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:44,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:44,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:46:44,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518442482] [2022-03-15 16:46:44,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:44,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:46:44,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:44,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:46:44,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:46:44,441 INFO L87 Difference]: Start difference. First operand 1767 states and 6319 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:48,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:48,829 INFO L93 Difference]: Finished difference Result 4229 states and 13510 transitions. [2022-03-15 16:46:48,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:46:48,830 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:46:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:48,837 INFO L225 Difference]: With dead ends: 4229 [2022-03-15 16:46:48,837 INFO L226 Difference]: Without dead ends: 4199 [2022-03-15 16:46:48,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1006, Invalid=4396, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:46:48,838 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 526 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:48,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 419 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1469 Invalid, 0 Unknown, 189 Unchecked, 0.9s Time] [2022-03-15 16:46:48,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2022-03-15 16:46:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 1886. [2022-03-15 16:46:48,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.5782493368700266) internal successors, (6745), 1885 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6745 transitions. [2022-03-15 16:46:48,884 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6745 transitions. Word has length 26 [2022-03-15 16:46:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:48,884 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 6745 transitions. [2022-03-15 16:46:48,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6745 transitions. [2022-03-15 16:46:48,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:46:48,887 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:48,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:46:48,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-15 16:46:49,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-15 16:46:49,087 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:49,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:49,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1979047816, now seen corresponding path program 34 times [2022-03-15 16:46:49,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:49,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138454420] [2022-03-15 16:46:49,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:49,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:49,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:49,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138454420] [2022-03-15 16:46:49,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138454420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:49,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369514826] [2022-03-15 16:46:49,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:46:49,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:49,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:49,526 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:49,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:46:49,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:46:49,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:49,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:46:49,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:50,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:50,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:50,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:50,143 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 115 treesize of output 75 [2022-03-15 16:46:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:50,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:50,736 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:46:50,737 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 211 treesize of output 149 [2022-03-15 16:46:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:51,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369514826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:51,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:51,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-15 16:46:51,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199484396] [2022-03-15 16:46:51,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:51,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:46:51,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:46:51,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:46:51,370 INFO L87 Difference]: Start difference. First operand 1886 states and 6745 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:55,774 INFO L93 Difference]: Finished difference Result 3713 states and 12473 transitions. [2022-03-15 16:46:55,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:46:55,775 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:46:55,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:55,781 INFO L225 Difference]: With dead ends: 3713 [2022-03-15 16:46:55,781 INFO L226 Difference]: Without dead ends: 3683 [2022-03-15 16:46:55,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=944, Invalid=5062, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:46:55,783 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 368 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:55,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 303 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:46:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3683 states. [2022-03-15 16:46:55,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3683 to 1932. [2022-03-15 16:46:55,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.5680994303469706) internal successors, (6890), 1931 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:55,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6890 transitions. [2022-03-15 16:46:55,829 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6890 transitions. Word has length 26 [2022-03-15 16:46:55,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:55,829 INFO L470 AbstractCegarLoop]: Abstraction has 1932 states and 6890 transitions. [2022-03-15 16:46:55,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:55,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6890 transitions. [2022-03-15 16:46:55,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:46:55,832 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:55,832 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] [2022-03-15 16:46:55,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 16:46:56,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 16:46:56,033 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:56,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1510872304, now seen corresponding path program 6 times [2022-03-15 16:46:56,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:56,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376403656] [2022-03-15 16:46:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:56,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:56,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:56,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376403656] [2022-03-15 16:46:56,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376403656] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:56,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902910134] [2022-03-15 16:46:56,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:46:56,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:56,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:56,393 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:56,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:46:56,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:46:56,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:56,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:46:56,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:56,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:56,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:56,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:46:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:57,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:57,732 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:46:57,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-15 16:46:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:59,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902910134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:59,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:59,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-15 16:46:59,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944835544] [2022-03-15 16:46:59,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:59,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:46:59,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:59,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:46:59,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:46:59,267 INFO L87 Difference]: Start difference. First operand 1932 states and 6890 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:47:07,212 INFO L93 Difference]: Finished difference Result 4709 states and 15013 transitions. [2022-03-15 16:47:07,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-15 16:47:07,212 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:47:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:47:07,221 INFO L225 Difference]: With dead ends: 4709 [2022-03-15 16:47:07,221 INFO L226 Difference]: Without dead ends: 4649 [2022-03-15 16:47:07,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3594 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1405, Invalid=9101, Unknown=0, NotChecked=0, Total=10506 [2022-03-15 16:47:07,222 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 658 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:47:07,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 496 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 16:47:07,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2022-03-15 16:47:07,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 1975. [2022-03-15 16:47:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 3.563323201621074) internal successors, (7034), 1974 states have internal predecessors, (7034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 7034 transitions. [2022-03-15 16:47:07,267 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 7034 transitions. Word has length 26 [2022-03-15 16:47:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:47:07,267 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 7034 transitions. [2022-03-15 16:47:07,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 7034 transitions. [2022-03-15 16:47:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:47:07,271 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:47:07,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:47:07,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 16:47:07,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-15 16:47:07,489 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:47:07,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:47:07,489 INFO L85 PathProgramCache]: Analyzing trace with hash 39509260, now seen corresponding path program 35 times [2022-03-15 16:47:07,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:47:07,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945241143] [2022-03-15 16:47:07,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:47:07,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:47:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:47:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:07,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:47:07,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945241143] [2022-03-15 16:47:07,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945241143] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:47:07,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627442198] [2022-03-15 16:47:07,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:47:07,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:07,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:47:07,859 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:47:07,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:47:07,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:47:07,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:47:07,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:47:07,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:47:08,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:08,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:08,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:08,487 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 115 treesize of output 75 [2022-03-15 16:47:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:08,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:47:09,032 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:47:09,032 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 211 treesize of output 149 [2022-03-15 16:47:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:09,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627442198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:47:09,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:47:09,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-15 16:47:09,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463061070] [2022-03-15 16:47:09,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:47:09,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:47:09,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:47:09,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:47:09,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:47:09,527 INFO L87 Difference]: Start difference. First operand 1975 states and 7034 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:18,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:47:18,172 INFO L93 Difference]: Finished difference Result 4911 states and 16020 transitions. [2022-03-15 16:47:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-15 16:47:18,172 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:47:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:47:18,180 INFO L225 Difference]: With dead ends: 4911 [2022-03-15 16:47:18,180 INFO L226 Difference]: Without dead ends: 4849 [2022-03-15 16:47:18,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5425 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2212, Invalid=12068, Unknown=0, NotChecked=0, Total=14280 [2022-03-15 16:47:18,181 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 515 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 2259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:47:18,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 495 Invalid, 2259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:47:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4849 states. [2022-03-15 16:47:18,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4849 to 2029. [2022-03-15 16:47:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 3.5660749506903353) internal successors, (7232), 2028 states have internal predecessors, (7232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:18,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 7232 transitions. [2022-03-15 16:47:18,222 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 7232 transitions. Word has length 26 [2022-03-15 16:47:18,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:47:18,222 INFO L470 AbstractCegarLoop]: Abstraction has 2029 states and 7232 transitions. [2022-03-15 16:47:18,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 7232 transitions. [2022-03-15 16:47:18,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:47:18,226 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:47:18,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:47:18,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 16:47:18,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:18,435 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:47:18,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:47:18,435 INFO L85 PathProgramCache]: Analyzing trace with hash -936809584, now seen corresponding path program 36 times [2022-03-15 16:47:18,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:47:18,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684814059] [2022-03-15 16:47:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:47:18,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:47:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:47:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:18,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:47:18,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684814059] [2022-03-15 16:47:18,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684814059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:47:18,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595898140] [2022-03-15 16:47:18,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:47:18,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:18,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:47:18,732 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:47:18,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 16:47:18,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:47:18,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:47:18,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:47:18,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:47:19,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:19,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:19,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:19,228 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 115 treesize of output 101 [2022-03-15 16:47:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:20,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:47:20,751 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:47:20,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-15 16:47:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:21,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595898140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:47:21,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:47:21,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-03-15 16:47:21,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785515674] [2022-03-15 16:47:21,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:47:21,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:47:21,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:47:21,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:47:21,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:47:21,245 INFO L87 Difference]: Start difference. First operand 2029 states and 7232 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:42,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:47:42,340 INFO L93 Difference]: Finished difference Result 5780 states and 18428 transitions. [2022-03-15 16:47:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-03-15 16:47:42,340 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:47:42,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:47:42,350 INFO L225 Difference]: With dead ends: 5780 [2022-03-15 16:47:42,350 INFO L226 Difference]: Without dead ends: 5732 [2022-03-15 16:47:42,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18563 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=4659, Invalid=39651, Unknown=0, NotChecked=0, Total=44310 [2022-03-15 16:47:42,352 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 775 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 4598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:47:42,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 967 Invalid, 4598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 4473 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-15 16:47:42,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5732 states. [2022-03-15 16:47:42,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5732 to 2120. [2022-03-15 16:47:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.561113732892874) internal successors, (7546), 2119 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7546 transitions. [2022-03-15 16:47:42,410 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7546 transitions. Word has length 26 [2022-03-15 16:47:42,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:47:42,410 INFO L470 AbstractCegarLoop]: Abstraction has 2120 states and 7546 transitions. [2022-03-15 16:47:42,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:42,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7546 transitions. [2022-03-15 16:47:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:47:42,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:47:42,414 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] [2022-03-15 16:47:42,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-15 16:47:42,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:42,630 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:47:42,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:47:42,630 INFO L85 PathProgramCache]: Analyzing trace with hash -755307532, now seen corresponding path program 7 times [2022-03-15 16:47:42,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:47:42,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547854945] [2022-03-15 16:47:42,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:47:42,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:47:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:47:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:43,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:47:43,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547854945] [2022-03-15 16:47:43,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547854945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:47:43,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120798102] [2022-03-15 16:47:43,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:47:43,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:43,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:47:43,020 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:47:43,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 16:47:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:47:43,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:47:43,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:47:43,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:43,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:43,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-15 16:47:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:43,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:47:44,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:44,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:44,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-03-15 16:47:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:45,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120798102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:47:45,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:47:45,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:47:45,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625665048] [2022-03-15 16:47:45,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:47:45,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:47:45,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:47:45,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:47:45,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:47:45,319 INFO L87 Difference]: Start difference. First operand 2120 states and 7546 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:47:48,930 INFO L93 Difference]: Finished difference Result 4433 states and 14344 transitions. [2022-03-15 16:47:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 16:47:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:47:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:47:48,938 INFO L225 Difference]: With dead ends: 4433 [2022-03-15 16:47:48,938 INFO L226 Difference]: Without dead ends: 4403 [2022-03-15 16:47:48,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=825, Invalid=3465, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:47:48,939 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 528 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:47:48,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 365 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1243 Invalid, 0 Unknown, 109 Unchecked, 0.8s Time] [2022-03-15 16:47:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4403 states. [2022-03-15 16:47:48,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4403 to 2143. [2022-03-15 16:47:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.5597572362278243) internal successors, (7625), 2142 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7625 transitions. [2022-03-15 16:47:48,983 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7625 transitions. Word has length 26 [2022-03-15 16:47:48,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:47:48,983 INFO L470 AbstractCegarLoop]: Abstraction has 2143 states and 7625 transitions. [2022-03-15 16:47:48,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7625 transitions. [2022-03-15 16:47:48,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:47:48,987 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:47:48,987 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] [2022-03-15 16:47:49,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-15 16:47:49,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-15 16:47:49,187 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:47:49,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:47:49,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2045752042, now seen corresponding path program 8 times [2022-03-15 16:47:49,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:47:49,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058575024] [2022-03-15 16:47:49,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:47:49,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:47:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:47:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:49,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:47:49,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058575024] [2022-03-15 16:47:49,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058575024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:47:49,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106930453] [2022-03-15 16:47:49,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:47:49,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:49,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:47:49,549 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:47:49,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 16:47:49,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:47:49,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:47:49,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:47:49,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:47:50,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:50,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:50,172 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 109 treesize of output 75 [2022-03-15 16:47:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:50,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:47:50,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:50,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:50,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:50,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-03-15 16:47:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:51,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106930453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:47:51,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:47:51,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-15 16:47:51,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200083636] [2022-03-15 16:47:51,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:47:51,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:47:51,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:47:51,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:47:51,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:47:51,780 INFO L87 Difference]: Start difference. First operand 2143 states and 7625 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:47:57,476 INFO L93 Difference]: Finished difference Result 4236 states and 13996 transitions. [2022-03-15 16:47:57,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:47:57,476 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:47:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:47:57,484 INFO L225 Difference]: With dead ends: 4236 [2022-03-15 16:47:57,484 INFO L226 Difference]: Without dead ends: 4194 [2022-03-15 16:47:57,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=972, Invalid=4880, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:47:57,484 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 627 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:47:57,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 332 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1239 Invalid, 0 Unknown, 393 Unchecked, 0.7s Time] [2022-03-15 16:47:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2022-03-15 16:47:57,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 2189. [2022-03-15 16:47:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 3.5626142595978063) internal successors, (7795), 2188 states have internal predecessors, (7795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 7795 transitions. [2022-03-15 16:47:57,526 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 7795 transitions. Word has length 26 [2022-03-15 16:47:57,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:47:57,526 INFO L470 AbstractCegarLoop]: Abstraction has 2189 states and 7795 transitions. [2022-03-15 16:47:57,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:57,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 7795 transitions. [2022-03-15 16:47:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:47:57,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:47:57,530 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] [2022-03-15 16:47:57,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-15 16:47:57,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 16:47:57,741 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:47:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:47:57,741 INFO L85 PathProgramCache]: Analyzing trace with hash 625931212, now seen corresponding path program 9 times [2022-03-15 16:47:57,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:47:57,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119881215] [2022-03-15 16:47:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:47:57,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:47:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:47:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:57,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:47:57,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119881215] [2022-03-15 16:47:57,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119881215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:47:57,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214144317] [2022-03-15 16:47:57,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:47:57,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:57,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:47:57,975 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:47:57,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 16:47:57,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:47:57,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:47:57,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:47:57,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:47:58,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:58,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:58,826 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 109 treesize of output 75 [2022-03-15 16:47:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:58,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:47:59,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:59,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 165 [2022-03-15 16:48:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:03,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214144317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:48:03,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:48:03,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 16:48:03,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526969267] [2022-03-15 16:48:03,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:48:03,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:48:03,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:48:03,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:48:03,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:48:03,237 INFO L87 Difference]: Start difference. First operand 2189 states and 7795 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:48:06,811 INFO L93 Difference]: Finished difference Result 6394 states and 21490 transitions. [2022-03-15 16:48:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 16:48:06,812 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:48:06,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:48:06,837 INFO L225 Difference]: With dead ends: 6394 [2022-03-15 16:48:06,838 INFO L226 Difference]: Without dead ends: 6334 [2022-03-15 16:48:06,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=954, Invalid=4016, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:48:06,838 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 568 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 535 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:48:06,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 278 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 620 Invalid, 0 Unknown, 535 Unchecked, 0.4s Time] [2022-03-15 16:48:06,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2022-03-15 16:48:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 2293. [2022-03-15 16:48:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 3.5715532286212914) internal successors, (8186), 2292 states have internal predecessors, (8186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 8186 transitions. [2022-03-15 16:48:06,890 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 8186 transitions. Word has length 26 [2022-03-15 16:48:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:48:06,891 INFO L470 AbstractCegarLoop]: Abstraction has 2293 states and 8186 transitions. [2022-03-15 16:48:06,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 8186 transitions. [2022-03-15 16:48:06,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:48:06,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:48:06,894 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] [2022-03-15 16:48:06,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 16:48:07,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-15 16:48:07,095 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:48:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:48:07,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1828243580, now seen corresponding path program 10 times [2022-03-15 16:48:07,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:48:07,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771419627] [2022-03-15 16:48:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:48:07,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:48:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:48:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:07,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:48:07,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771419627] [2022-03-15 16:48:07,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771419627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:48:07,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194024993] [2022-03-15 16:48:07,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:48:07,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:48:07,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:48:07,326 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:48:07,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 16:48:07,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:48:07,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:48:07,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:48:07,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:48:07,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:48:07,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:07,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-15 16:48:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:07,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:48:08,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:08,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:08,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-03-15 16:48:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:09,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194024993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:48:09,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:48:09,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 16:48:09,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905579008] [2022-03-15 16:48:09,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:48:09,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:48:09,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:48:09,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:48:09,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:48:09,449 INFO L87 Difference]: Start difference. First operand 2293 states and 8186 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:13,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:48:13,649 INFO L93 Difference]: Finished difference Result 5104 states and 16501 transitions. [2022-03-15 16:48:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:48:13,649 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:48:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:48:13,659 INFO L225 Difference]: With dead ends: 5104 [2022-03-15 16:48:13,660 INFO L226 Difference]: Without dead ends: 5059 [2022-03-15 16:48:13,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=871, Invalid=3551, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:48:13,660 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 578 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:48:13,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 341 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:48:13,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5059 states. [2022-03-15 16:48:13,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5059 to 2237. [2022-03-15 16:48:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 3.57871198568873) internal successors, (8002), 2236 states have internal predecessors, (8002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 8002 transitions. [2022-03-15 16:48:13,720 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 8002 transitions. Word has length 26 [2022-03-15 16:48:13,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:48:13,720 INFO L470 AbstractCegarLoop]: Abstraction has 2237 states and 8002 transitions. [2022-03-15 16:48:13,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:13,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 8002 transitions. [2022-03-15 16:48:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:48:13,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:48:13,724 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] [2022-03-15 16:48:13,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 16:48:13,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:48:13,924 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:48:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:48:13,925 INFO L85 PathProgramCache]: Analyzing trace with hash -633075064, now seen corresponding path program 11 times [2022-03-15 16:48:13,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:48:13,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145052145] [2022-03-15 16:48:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:48:13,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:48:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:48:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:14,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:48:14,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145052145] [2022-03-15 16:48:14,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145052145] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:48:14,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451793160] [2022-03-15 16:48:14,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:48:14,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:48:14,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:48:14,138 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:48:14,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 16:48:14,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:48:14,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:48:14,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:48:14,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:48:14,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:48:14,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:14,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:48:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:14,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:48:15,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:15,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:15,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-03-15 16:48:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:16,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451793160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:48:16,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:48:16,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:48:16,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003958778] [2022-03-15 16:48:16,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:48:16,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:48:16,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:48:16,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:48:16,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:48:16,637 INFO L87 Difference]: Start difference. First operand 2237 states and 8002 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:48:30,072 INFO L93 Difference]: Finished difference Result 6858 states and 21900 transitions. [2022-03-15 16:48:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-15 16:48:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:48:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:48:30,087 INFO L225 Difference]: With dead ends: 6858 [2022-03-15 16:48:30,087 INFO L226 Difference]: Without dead ends: 6769 [2022-03-15 16:48:30,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6061 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=2770, Invalid=13742, Unknown=0, NotChecked=0, Total=16512 [2022-03-15 16:48:30,088 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 877 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 2748 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:48:30,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 675 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2748 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-15 16:48:30,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2022-03-15 16:48:30,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 2312. [2022-03-15 16:48:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2311 states have (on average 3.6057983556901774) internal successors, (8333), 2311 states have internal predecessors, (8333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:30,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 8333 transitions. [2022-03-15 16:48:30,173 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 8333 transitions. Word has length 26 [2022-03-15 16:48:30,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:48:30,173 INFO L470 AbstractCegarLoop]: Abstraction has 2312 states and 8333 transitions. [2022-03-15 16:48:30,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 8333 transitions. [2022-03-15 16:48:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:48:30,177 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:48:30,177 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] [2022-03-15 16:48:30,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 16:48:30,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 16:48:30,378 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:48:30,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:48:30,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1129796424, now seen corresponding path program 12 times [2022-03-15 16:48:30,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:48:30,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942263216] [2022-03-15 16:48:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:48:30,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:48:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:48:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:30,644 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:48:30,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942263216] [2022-03-15 16:48:30,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942263216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:48:30,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428516671] [2022-03-15 16:48:30,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:48:30,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:48:30,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:48:30,646 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:48:30,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 16:48:30,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:48:30,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:48:30,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:48:30,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:48:31,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:48:31,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:31,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:48:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:31,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:48:31,876 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:48:31,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-15 16:48:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:32,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428516671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:48:32,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:48:32,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-15 16:48:32,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816121839] [2022-03-15 16:48:32,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:48:32,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:48:32,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:48:32,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:48:32,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:48:32,766 INFO L87 Difference]: Start difference. First operand 2312 states and 8333 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:39,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:48:39,702 INFO L93 Difference]: Finished difference Result 4834 states and 15890 transitions. [2022-03-15 16:48:39,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 16:48:39,702 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:48:39,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:48:39,710 INFO L225 Difference]: With dead ends: 4834 [2022-03-15 16:48:39,710 INFO L226 Difference]: Without dead ends: 4789 [2022-03-15 16:48:39,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2737 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1242, Invalid=7314, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:48:39,711 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 406 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 2841 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:48:39,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 622 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2841 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 16:48:39,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4789 states. [2022-03-15 16:48:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4789 to 2314. [2022-03-15 16:48:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2313 states have (on average 3.610030263726762) internal successors, (8350), 2313 states have internal predecessors, (8350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:39,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 8350 transitions. [2022-03-15 16:48:39,754 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 8350 transitions. Word has length 26 [2022-03-15 16:48:39,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:48:39,754 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 8350 transitions. [2022-03-15 16:48:39,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 8350 transitions. [2022-03-15 16:48:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:48:39,758 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:48:39,758 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] [2022-03-15 16:48:39,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 16:48:39,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:48:39,959 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:48:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:48:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash 555566964, now seen corresponding path program 13 times [2022-03-15 16:48:39,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:48:39,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035637537] [2022-03-15 16:48:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:48:39,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:48:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:48:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:40,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:48:40,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035637537] [2022-03-15 16:48:40,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035637537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:48:40,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739905938] [2022-03-15 16:48:40,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:48:40,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:48:40,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:48:40,221 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:48:40,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 16:48:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:48:40,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:48:40,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:48:40,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:48:40,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:40,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:40,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 83 [2022-03-15 16:48:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:41,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:48:41,624 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:48:41,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-15 16:48:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:42,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739905938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:48:42,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:48:42,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-15 16:48:42,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293865199] [2022-03-15 16:48:42,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:48:42,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:48:42,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:48:42,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:48:42,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:48:42,761 INFO L87 Difference]: Start difference. First operand 2314 states and 8350 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:48,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:48:48,904 INFO L93 Difference]: Finished difference Result 4771 states and 15740 transitions. [2022-03-15 16:48:48,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 16:48:48,905 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:48:48,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:48:48,913 INFO L225 Difference]: With dead ends: 4771 [2022-03-15 16:48:48,913 INFO L226 Difference]: Without dead ends: 4711 [2022-03-15 16:48:48,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2745 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1116, Invalid=7440, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:48:48,914 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 378 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:48:48,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 409 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2118 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 16:48:48,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4711 states. [2022-03-15 16:48:48,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4711 to 2352. [2022-03-15 16:48:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.5997447894512975) internal successors, (8463), 2351 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 8463 transitions. [2022-03-15 16:48:48,960 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 8463 transitions. Word has length 26 [2022-03-15 16:48:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:48:48,960 INFO L470 AbstractCegarLoop]: Abstraction has 2352 states and 8463 transitions. [2022-03-15 16:48:48,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 8463 transitions. [2022-03-15 16:48:48,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:48:48,963 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:48:48,964 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] [2022-03-15 16:48:48,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 16:48:49,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-15 16:48:49,164 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:48:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:48:49,164 INFO L85 PathProgramCache]: Analyzing trace with hash -496512208, now seen corresponding path program 14 times [2022-03-15 16:48:49,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:48:49,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924662950] [2022-03-15 16:48:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:48:49,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:48:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:48:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:49,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:48:49,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924662950] [2022-03-15 16:48:49,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924662950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:48:49,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652649817] [2022-03-15 16:48:49,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:48:49,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:48:49,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:48:49,525 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:48:49,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 16:48:49,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:48:49,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:48:49,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:48:49,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:48:50,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:50,062 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 109 treesize of output 91 [2022-03-15 16:48:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:50,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:48:51,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:51,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:51,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:51,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-03-15 16:48:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:52,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652649817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:48:52,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:48:52,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-15 16:48:52,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260203370] [2022-03-15 16:48:52,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:48:52,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:48:52,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:48:52,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:48:52,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:48:52,141 INFO L87 Difference]: Start difference. First operand 2352 states and 8463 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:58,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:48:58,004 INFO L93 Difference]: Finished difference Result 4575 states and 15177 transitions. [2022-03-15 16:48:58,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:48:58,005 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:48:58,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:48:58,014 INFO L225 Difference]: With dead ends: 4575 [2022-03-15 16:48:58,014 INFO L226 Difference]: Without dead ends: 4539 [2022-03-15 16:48:58,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=979, Invalid=4721, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:48:58,015 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 542 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:48:58,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 374 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1428 Invalid, 0 Unknown, 282 Unchecked, 0.9s Time] [2022-03-15 16:48:58,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4539 states. [2022-03-15 16:48:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4539 to 2340. [2022-03-15 16:48:58,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 2339 states have (on average 3.6041043180846515) internal successors, (8430), 2339 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 8430 transitions. [2022-03-15 16:48:58,078 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 8430 transitions. Word has length 26 [2022-03-15 16:48:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:48:58,078 INFO L470 AbstractCegarLoop]: Abstraction has 2340 states and 8430 transitions. [2022-03-15 16:48:58,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 8430 transitions. [2022-03-15 16:48:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:48:58,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:48:58,082 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] [2022-03-15 16:48:58,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-15 16:48:58,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-15 16:48:58,283 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:48:58,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:48:58,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1636584436, now seen corresponding path program 15 times [2022-03-15 16:48:58,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:48:58,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165736182] [2022-03-15 16:48:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:48:58,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:48:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:48:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:58,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:48:58,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165736182] [2022-03-15 16:48:58,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165736182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:48:58,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481713582] [2022-03-15 16:48:58,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:48:58,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:48:58,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:48:58,632 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:48:58,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 16:48:58,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:48:58,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:48:58,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:48:58,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:48:59,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:59,210 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 109 treesize of output 91 [2022-03-15 16:48:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:59,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:49:00,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:00,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:00,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:00,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-03-15 16:49:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:01,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481713582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:49:01,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:49:01,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-15 16:49:01,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756370179] [2022-03-15 16:49:01,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:49:01,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:49:01,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:49:01,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:49:01,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:49:01,102 INFO L87 Difference]: Start difference. First operand 2340 states and 8430 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:49:06,441 INFO L93 Difference]: Finished difference Result 4881 states and 16181 transitions. [2022-03-15 16:49:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:49:06,441 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:49:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:49:06,451 INFO L225 Difference]: With dead ends: 4881 [2022-03-15 16:49:06,452 INFO L226 Difference]: Without dead ends: 4865 [2022-03-15 16:49:06,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2002 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=980, Invalid=5182, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 16:49:06,452 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 613 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:49:06,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 346 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1473 Invalid, 0 Unknown, 189 Unchecked, 0.9s Time] [2022-03-15 16:49:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4865 states. [2022-03-15 16:49:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4865 to 2322. [2022-03-15 16:49:06,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2321 states have (on average 3.6092201637225334) internal successors, (8377), 2321 states have internal predecessors, (8377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 8377 transitions. [2022-03-15 16:49:06,517 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 8377 transitions. Word has length 26 [2022-03-15 16:49:06,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:49:06,517 INFO L470 AbstractCegarLoop]: Abstraction has 2322 states and 8377 transitions. [2022-03-15 16:49:06,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 8377 transitions. [2022-03-15 16:49:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:49:06,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:49:06,521 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] [2022-03-15 16:49:06,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 16:49:06,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:06,723 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:49:06,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:49:06,724 INFO L85 PathProgramCache]: Analyzing trace with hash -871001100, now seen corresponding path program 16 times [2022-03-15 16:49:06,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:49:06,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531043540] [2022-03-15 16:49:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:49:06,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:49:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:49:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:07,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:49:07,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531043540] [2022-03-15 16:49:07,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531043540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:49:07,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137026886] [2022-03-15 16:49:07,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:49:07,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:07,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:49:07,004 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:49:07,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 16:49:07,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:49:07,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:49:07,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:49:07,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:49:07,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:49:07,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:07,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:49:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:07,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:49:08,405 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:49:08,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-03-15 16:49:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:09,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137026886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:49:09,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:49:09,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-15 16:49:09,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340585938] [2022-03-15 16:49:09,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:49:09,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:49:09,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:49:09,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:49:09,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:49:09,771 INFO L87 Difference]: Start difference. First operand 2322 states and 8377 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:15,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:49:15,315 INFO L93 Difference]: Finished difference Result 4731 states and 15686 transitions. [2022-03-15 16:49:15,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 16:49:15,315 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:49:15,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:49:15,326 INFO L225 Difference]: With dead ends: 4731 [2022-03-15 16:49:15,326 INFO L226 Difference]: Without dead ends: 4686 [2022-03-15 16:49:15,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=949, Invalid=5531, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:49:15,327 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 364 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:49:15,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 489 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 16:49:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2022-03-15 16:49:15,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 2324. [2022-03-15 16:49:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 3.610848041325872) internal successors, (8388), 2323 states have internal predecessors, (8388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 8388 transitions. [2022-03-15 16:49:15,385 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 8388 transitions. Word has length 26 [2022-03-15 16:49:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:49:15,385 INFO L470 AbstractCegarLoop]: Abstraction has 2324 states and 8388 transitions. [2022-03-15 16:49:15,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 8388 transitions. [2022-03-15 16:49:15,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:49:15,389 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:49:15,389 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] [2022-03-15 16:49:15,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 16:49:15,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-15 16:49:15,590 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:49:15,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:49:15,590 INFO L85 PathProgramCache]: Analyzing trace with hash 347233680, now seen corresponding path program 17 times [2022-03-15 16:49:15,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:49:15,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087313732] [2022-03-15 16:49:15,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:49:15,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:49:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:49:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:15,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:49:15,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087313732] [2022-03-15 16:49:15,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087313732] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:49:15,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780716666] [2022-03-15 16:49:15,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:49:15,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:15,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:49:15,797 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:49:15,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 16:49:15,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:49:15,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:49:15,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:49:15,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:49:16,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:49:16,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:16,315 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 115 treesize of output 75 [2022-03-15 16:49:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:16,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:49:16,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:16,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:16,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-15 16:49:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:18,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780716666] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:49:18,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:49:18,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 16:49:18,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351285154] [2022-03-15 16:49:18,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:49:18,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:49:18,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:49:18,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:49:18,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:49:18,027 INFO L87 Difference]: Start difference. First operand 2324 states and 8388 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:30,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:49:30,018 INFO L93 Difference]: Finished difference Result 6055 states and 18996 transitions. [2022-03-15 16:49:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-15 16:49:30,018 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:49:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:49:30,029 INFO L225 Difference]: With dead ends: 6055 [2022-03-15 16:49:30,029 INFO L226 Difference]: Without dead ends: 5869 [2022-03-15 16:49:30,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5847 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=2167, Invalid=14089, Unknown=0, NotChecked=0, Total=16256 [2022-03-15 16:49:30,030 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 652 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:49:30,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 553 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 16:49:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5869 states. [2022-03-15 16:49:30,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5869 to 2499. [2022-03-15 16:49:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 3.610888710968775) internal successors, (9020), 2498 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:30,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 9020 transitions. [2022-03-15 16:49:30,085 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 9020 transitions. Word has length 26 [2022-03-15 16:49:30,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:49:30,085 INFO L470 AbstractCegarLoop]: Abstraction has 2499 states and 9020 transitions. [2022-03-15 16:49:30,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:30,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 9020 transitions. [2022-03-15 16:49:30,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:49:30,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:49:30,089 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] [2022-03-15 16:49:30,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-15 16:49:30,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-15 16:49:30,289 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:49:30,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:49:30,290 INFO L85 PathProgramCache]: Analyzing trace with hash -911772596, now seen corresponding path program 18 times [2022-03-15 16:49:30,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:49:30,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350617074] [2022-03-15 16:49:30,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:49:30,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:49:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:49:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:30,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:49:30,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350617074] [2022-03-15 16:49:30,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350617074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:49:30,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042971361] [2022-03-15 16:49:30,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:49:30,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:30,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:49:30,474 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:49:30,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 16:49:30,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:49:30,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:49:30,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:49:30,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:49:30,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:49:30,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:30,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:49:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:31,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:49:31,699 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:49:31,699 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 191 treesize of output 157 [2022-03-15 16:49:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:33,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042971361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:49:33,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:49:33,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-15 16:49:33,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608210627] [2022-03-15 16:49:33,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:49:33,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:49:33,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:49:33,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:49:33,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:49:33,220 INFO L87 Difference]: Start difference. First operand 2499 states and 9020 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:49:41,226 INFO L93 Difference]: Finished difference Result 5599 states and 18252 transitions. [2022-03-15 16:49:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 16:49:41,226 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:49:41,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:49:41,237 INFO L225 Difference]: With dead ends: 5599 [2022-03-15 16:49:41,238 INFO L226 Difference]: Without dead ends: 5493 [2022-03-15 16:49:41,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2767 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1258, Invalid=7114, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 16:49:41,238 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 451 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:49:41,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 447 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2158 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 16:49:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5493 states. [2022-03-15 16:49:41,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5493 to 2534. [2022-03-15 16:49:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 3.603237268061587) internal successors, (9127), 2533 states have internal predecessors, (9127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:41,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 9127 transitions. [2022-03-15 16:49:41,301 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 9127 transitions. Word has length 26 [2022-03-15 16:49:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:49:41,301 INFO L470 AbstractCegarLoop]: Abstraction has 2534 states and 9127 transitions. [2022-03-15 16:49:41,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:41,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 9127 transitions. [2022-03-15 16:49:41,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:49:41,305 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:49:41,305 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] [2022-03-15 16:49:41,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 16:49:41,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:41,517 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:49:41,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:49:41,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1454516880, now seen corresponding path program 19 times [2022-03-15 16:49:41,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:49:41,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964666907] [2022-03-15 16:49:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:49:41,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:49:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:49:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:41,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:49:41,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964666907] [2022-03-15 16:49:41,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964666907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:49:41,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836592941] [2022-03-15 16:49:41,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:49:41,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:41,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:49:41,748 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:49:41,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 16:49:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:49:41,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:49:41,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:49:42,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:49:42,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:42,227 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 109 treesize of output 75 [2022-03-15 16:49:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:42,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:49:42,853 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:49:42,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 157 [2022-03-15 16:49:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:44,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836592941] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:49:44,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:49:44,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:49:44,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785626174] [2022-03-15 16:49:44,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:49:44,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:49:44,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:49:44,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:49:44,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:49:44,882 INFO L87 Difference]: Start difference. First operand 2534 states and 9127 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 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) [2022-03-15 16:49:46,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:49:46,582 INFO L93 Difference]: Finished difference Result 3814 states and 12781 transitions. [2022-03-15 16:49:46,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:49:46,582 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 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 26 [2022-03-15 16:49:46,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:49:46,590 INFO L225 Difference]: With dead ends: 3814 [2022-03-15 16:49:46,590 INFO L226 Difference]: Without dead ends: 3777 [2022-03-15 16:49:46,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=240, Invalid=1320, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:49:46,590 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 205 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:49:46,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 283 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1135 Invalid, 0 Unknown, 69 Unchecked, 0.6s Time] [2022-03-15 16:49:46,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2022-03-15 16:49:46,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 2550. [2022-03-15 16:49:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.6002353864260495) internal successors, (9177), 2549 states have internal predecessors, (9177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:46,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 9177 transitions. [2022-03-15 16:49:46,636 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 9177 transitions. Word has length 26 [2022-03-15 16:49:46,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:49:46,637 INFO L470 AbstractCegarLoop]: Abstraction has 2550 states and 9177 transitions. [2022-03-15 16:49:46,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 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) [2022-03-15 16:49:46,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 9177 transitions. [2022-03-15 16:49:46,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:49:46,640 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:49:46,641 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] [2022-03-15 16:49:46,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 16:49:46,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:46,841 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:49:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:49:46,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1269624816, now seen corresponding path program 20 times [2022-03-15 16:49:46,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:49:46,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928813410] [2022-03-15 16:49:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:49:46,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:49:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:49:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:47,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:49:47,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928813410] [2022-03-15 16:49:47,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928813410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:49:47,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194052708] [2022-03-15 16:49:47,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:49:47,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:47,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:49:47,028 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:49:47,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 16:49:47,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:49:47,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:49:47,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:49:47,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:49:47,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:49:47,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:47,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:49:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:47,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:49:48,275 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:49:48,275 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 195 treesize of output 157 [2022-03-15 16:49:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:50,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194052708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:49:50,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:49:50,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-15 16:49:50,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184180030] [2022-03-15 16:49:50,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:49:50,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:49:50,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:49:50,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:49:50,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:49:50,166 INFO L87 Difference]: Start difference. First operand 2550 states and 9177 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:49:56,400 INFO L93 Difference]: Finished difference Result 5343 states and 17520 transitions. [2022-03-15 16:49:56,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:49:56,400 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:49:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:49:56,425 INFO L225 Difference]: With dead ends: 5343 [2022-03-15 16:49:56,426 INFO L226 Difference]: Without dead ends: 5210 [2022-03-15 16:49:56,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2263 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1009, Invalid=5963, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 16:49:56,426 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 399 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 2310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:49:56,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 462 Invalid, 2310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:49:56,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5210 states. [2022-03-15 16:49:56,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5210 to 2575. [2022-03-15 16:49:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2574 states have (on average 3.604118104118104) internal successors, (9277), 2574 states have internal predecessors, (9277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 9277 transitions. [2022-03-15 16:49:56,482 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 9277 transitions. Word has length 26 [2022-03-15 16:49:56,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:49:56,482 INFO L470 AbstractCegarLoop]: Abstraction has 2575 states and 9277 transitions. [2022-03-15 16:49:56,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:56,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 9277 transitions. [2022-03-15 16:49:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:49:56,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:49:56,486 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] [2022-03-15 16:49:56,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-15 16:49:56,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:56,687 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:49:56,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:49:56,687 INFO L85 PathProgramCache]: Analyzing trace with hash 920481968, now seen corresponding path program 21 times [2022-03-15 16:49:56,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:49:56,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404528807] [2022-03-15 16:49:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:49:56,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:49:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:49:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:57,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:49:57,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404528807] [2022-03-15 16:49:57,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404528807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:49:57,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249936605] [2022-03-15 16:49:57,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:49:57,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:57,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:49:57,047 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:49:57,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 16:49:57,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:49:57,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:49:57,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:49:57,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:49:57,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:49:57,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:57,609 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 109 treesize of output 75 [2022-03-15 16:49:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:57,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:49:58,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:58,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:58,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-15 16:50:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:00,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249936605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:50:00,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:50:00,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:50:00,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577926308] [2022-03-15 16:50:00,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:50:00,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:50:00,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:50:00,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:50:00,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:50:00,286 INFO L87 Difference]: Start difference. First operand 2575 states and 9277 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:02,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:50:02,811 INFO L93 Difference]: Finished difference Result 4588 states and 15324 transitions. [2022-03-15 16:50:02,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:50:02,815 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:50:02,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:50:02,824 INFO L225 Difference]: With dead ends: 4588 [2022-03-15 16:50:02,824 INFO L226 Difference]: Without dead ends: 4540 [2022-03-15 16:50:02,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=660, Invalid=3000, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:50:02,825 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 368 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:50:02,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 374 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 889 Invalid, 0 Unknown, 480 Unchecked, 0.5s Time] [2022-03-15 16:50:02,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2022-03-15 16:50:02,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 2645. [2022-03-15 16:50:02,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.6021180030257187) internal successors, (9524), 2644 states have internal predecessors, (9524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 9524 transitions. [2022-03-15 16:50:02,873 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 9524 transitions. Word has length 26 [2022-03-15 16:50:02,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:50:02,873 INFO L470 AbstractCegarLoop]: Abstraction has 2645 states and 9524 transitions. [2022-03-15 16:50:02,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 9524 transitions. [2022-03-15 16:50:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:50:02,877 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:50:02,877 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] [2022-03-15 16:50:02,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-15 16:50:03,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 16:50:03,077 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:50:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:50:03,078 INFO L85 PathProgramCache]: Analyzing trace with hash -697050812, now seen corresponding path program 22 times [2022-03-15 16:50:03,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:50:03,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931132689] [2022-03-15 16:50:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:50:03,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:50:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:50:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:03,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:50:03,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931132689] [2022-03-15 16:50:03,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931132689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:50:03,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511760228] [2022-03-15 16:50:03,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:50:03,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:03,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:50:03,295 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:50:03,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 16:50:03,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:50:03,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:50:03,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:50:03,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:50:03,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:03,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:03,737 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 109 treesize of output 91 [2022-03-15 16:50:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:04,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:50:04,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:04,976 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 187 treesize of output 173 [2022-03-15 16:50:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:08,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511760228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:50:08,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:50:08,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 16:50:08,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211798527] [2022-03-15 16:50:08,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:50:08,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:50:08,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:50:08,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:50:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:50:08,669 INFO L87 Difference]: Start difference. First operand 2645 states and 9524 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-03-15 16:50:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:50:15,602 INFO L93 Difference]: Finished difference Result 6742 states and 22347 transitions. [2022-03-15 16:50:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 16:50:15,602 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-03-15 16:50:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:50:15,617 INFO L225 Difference]: With dead ends: 6742 [2022-03-15 16:50:15,617 INFO L226 Difference]: Without dead ends: 6698 [2022-03-15 16:50:15,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2263 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1147, Invalid=5333, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:50:15,618 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 354 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:50:15,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 487 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1259 Invalid, 0 Unknown, 319 Unchecked, 0.8s Time] [2022-03-15 16:50:15,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6698 states. [2022-03-15 16:50:15,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6698 to 2821. [2022-03-15 16:50:15,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2820 states have (on average 3.6141843971631205) internal successors, (10192), 2820 states have internal predecessors, (10192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 10192 transitions. [2022-03-15 16:50:15,720 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 10192 transitions. Word has length 26 [2022-03-15 16:50:15,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:50:15,720 INFO L470 AbstractCegarLoop]: Abstraction has 2821 states and 10192 transitions. [2022-03-15 16:50:15,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-03-15 16:50:15,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 10192 transitions. [2022-03-15 16:50:15,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:50:15,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:50:15,725 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] [2022-03-15 16:50:15,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-15 16:50:15,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-03-15 16:50:15,927 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:50:15,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:50:15,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1907973580, now seen corresponding path program 23 times [2022-03-15 16:50:15,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:50:15,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62880633] [2022-03-15 16:50:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:50:15,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:50:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:50:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:16,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:50:16,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62880633] [2022-03-15 16:50:16,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62880633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:50:16,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161867665] [2022-03-15 16:50:16,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:50:16,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:16,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:50:16,190 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:50:16,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 16:50:16,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:50:16,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:50:16,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:50:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:50:16,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:16,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:16,637 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 109 treesize of output 91 [2022-03-15 16:50:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:17,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:50:17,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:17,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 161 [2022-03-15 16:50:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:21,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161867665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:50:21,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:50:21,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:50:21,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411432000] [2022-03-15 16:50:21,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:50:21,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:50:21,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:50:21,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:50:21,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:50:21,542 INFO L87 Difference]: Start difference. First operand 2821 states and 10192 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:31,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:50:31,665 INFO L93 Difference]: Finished difference Result 5726 states and 19035 transitions. [2022-03-15 16:50:31,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-15 16:50:31,666 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:50:31,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:50:31,677 INFO L225 Difference]: With dead ends: 5726 [2022-03-15 16:50:31,677 INFO L226 Difference]: Without dead ends: 5612 [2022-03-15 16:50:31,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5456 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=2117, Invalid=12403, Unknown=0, NotChecked=0, Total=14520 [2022-03-15 16:50:31,678 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 602 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:50:31,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 367 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1099 Invalid, 0 Unknown, 318 Unchecked, 0.9s Time] [2022-03-15 16:50:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5612 states. [2022-03-15 16:50:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5612 to 3007. [2022-03-15 16:50:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3007 states, 3006 states have (on average 3.614105123087159) internal successors, (10864), 3006 states have internal predecessors, (10864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3007 states to 3007 states and 10864 transitions. [2022-03-15 16:50:31,741 INFO L78 Accepts]: Start accepts. Automaton has 3007 states and 10864 transitions. Word has length 26 [2022-03-15 16:50:31,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:50:31,741 INFO L470 AbstractCegarLoop]: Abstraction has 3007 states and 10864 transitions. [2022-03-15 16:50:31,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:31,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3007 states and 10864 transitions. [2022-03-15 16:50:31,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:50:31,746 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:50:31,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:50:31,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-15 16:50:31,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-15 16:50:31,946 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:50:31,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:50:31,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2130990306, now seen corresponding path program 37 times [2022-03-15 16:50:31,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:50:31,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736304113] [2022-03-15 16:50:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:50:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:50:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:50:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:32,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:50:32,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736304113] [2022-03-15 16:50:32,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736304113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:50:32,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052090734] [2022-03-15 16:50:32,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:50:32,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:32,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:50:32,242 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:50:32,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 16:50:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:50:32,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:50:32,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:50:32,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:32,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:32,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:32,885 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 115 treesize of output 75 [2022-03-15 16:50:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:33,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:50:33,538 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:50:33,538 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 211 treesize of output 149 [2022-03-15 16:50:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:34,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052090734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:50:34,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:50:34,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-15 16:50:34,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563851103] [2022-03-15 16:50:34,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:50:34,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:50:34,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:50:34,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:50:34,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:50:34,076 INFO L87 Difference]: Start difference. First operand 3007 states and 10864 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:50:36,637 INFO L93 Difference]: Finished difference Result 4711 states and 16140 transitions. [2022-03-15 16:50:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:50:36,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:50:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:50:36,646 INFO L225 Difference]: With dead ends: 4711 [2022-03-15 16:50:36,647 INFO L226 Difference]: Without dead ends: 4681 [2022-03-15 16:50:36,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=630, Invalid=3530, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:50:36,647 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 235 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:50:36,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 317 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:50:36,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4681 states. [2022-03-15 16:50:36,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4681 to 3029. [2022-03-15 16:50:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 3.60997357992074) internal successors, (10931), 3028 states have internal predecessors, (10931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 10931 transitions. [2022-03-15 16:50:36,702 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 10931 transitions. Word has length 26 [2022-03-15 16:50:36,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:50:36,702 INFO L470 AbstractCegarLoop]: Abstraction has 3029 states and 10931 transitions. [2022-03-15 16:50:36,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 10931 transitions. [2022-03-15 16:50:36,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:50:36,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:50:36,707 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:50:36,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-15 16:50:36,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:36,915 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:50:36,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:50:36,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1013224948, now seen corresponding path program 38 times [2022-03-15 16:50:36,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:50:36,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363942481] [2022-03-15 16:50:36,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:50:36,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:50:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:50:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:37,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:50:37,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363942481] [2022-03-15 16:50:37,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363942481] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:50:37,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591367141] [2022-03-15 16:50:37,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:50:37,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:37,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:50:37,222 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:50:37,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 16:50:37,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:50:37,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:50:37,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:50:37,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:50:37,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:37,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:37,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:37,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-03-15 16:50:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:38,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:50:39,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:39,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:39,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:39,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:39,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 215 treesize of output 143 [2022-03-15 16:50:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:39,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591367141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:50:39,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:50:39,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 16:50:39,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579091442] [2022-03-15 16:50:39,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:50:39,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:50:39,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:50:39,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:50:39,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:50:39,641 INFO L87 Difference]: Start difference. First operand 3029 states and 10931 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:44,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:50:44,921 INFO L93 Difference]: Finished difference Result 4878 states and 16602 transitions. [2022-03-15 16:50:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:50:44,921 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:50:44,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:50:44,933 INFO L225 Difference]: With dead ends: 4878 [2022-03-15 16:50:44,933 INFO L226 Difference]: Without dead ends: 4748 [2022-03-15 16:50:44,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=982, Invalid=4718, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:50:44,934 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 356 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:50:44,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 335 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:50:44,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2022-03-15 16:50:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 3093. [2022-03-15 16:50:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 3092 states have (on average 3.595407503234153) internal successors, (11117), 3092 states have internal predecessors, (11117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:45,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 11117 transitions. [2022-03-15 16:50:45,008 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 11117 transitions. Word has length 26 [2022-03-15 16:50:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:50:45,008 INFO L470 AbstractCegarLoop]: Abstraction has 3093 states and 11117 transitions. [2022-03-15 16:50:45,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:45,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 11117 transitions. [2022-03-15 16:50:45,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:50:45,014 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:50:45,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:50:45,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 16:50:45,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:45,232 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:50:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:50:45,233 INFO L85 PathProgramCache]: Analyzing trace with hash 54649616, now seen corresponding path program 39 times [2022-03-15 16:50:45,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:50:45,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720726668] [2022-03-15 16:50:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:50:45,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:50:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:50:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:45,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:50:45,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720726668] [2022-03-15 16:50:45,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720726668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:50:45,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688184389] [2022-03-15 16:50:45,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:50:45,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:45,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:50:45,517 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:50:45,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 16:50:45,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:50:45,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:50:45,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:50:45,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:50:45,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:45,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:45,979 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 119 treesize of output 111 [2022-03-15 16:50:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:47,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:50:49,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:49,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:49,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:49,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:49,009 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 167 treesize of output 93 [2022-03-15 16:50:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:49,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688184389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:50:49,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:50:49,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-03-15 16:50:49,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382172332] [2022-03-15 16:50:49,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:50:49,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:50:49,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:50:49,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:50:49,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:50:49,045 INFO L87 Difference]: Start difference. First operand 3093 states and 11117 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:50:54,506 INFO L93 Difference]: Finished difference Result 5734 states and 19356 transitions. [2022-03-15 16:50:54,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:50:54,507 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:50:54,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:50:54,532 INFO L225 Difference]: With dead ends: 5734 [2022-03-15 16:50:54,532 INFO L226 Difference]: Without dead ends: 5689 [2022-03-15 16:50:54,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2426 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1204, Invalid=6278, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 16:50:54,533 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 414 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 848 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:50:54,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 544 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1476 Invalid, 0 Unknown, 848 Unchecked, 0.8s Time] [2022-03-15 16:50:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5689 states. [2022-03-15 16:50:54,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5689 to 3168. [2022-03-15 16:50:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3168 states, 3167 states have (on average 3.5841490369434794) internal successors, (11351), 3167 states have internal predecessors, (11351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3168 states to 3168 states and 11351 transitions. [2022-03-15 16:50:54,595 INFO L78 Accepts]: Start accepts. Automaton has 3168 states and 11351 transitions. Word has length 26 [2022-03-15 16:50:54,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:50:54,595 INFO L470 AbstractCegarLoop]: Abstraction has 3168 states and 11351 transitions. [2022-03-15 16:50:54,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:54,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3168 states and 11351 transitions. [2022-03-15 16:50:54,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:50:54,600 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:50:54,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:50:54,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-15 16:50:54,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-15 16:50:54,801 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:50:54,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:50:54,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1528867272, now seen corresponding path program 40 times [2022-03-15 16:50:54,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:50:54,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222077708] [2022-03-15 16:50:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:50:54,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:50:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:50:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:55,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:50:55,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222077708] [2022-03-15 16:50:55,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222077708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:50:55,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057443721] [2022-03-15 16:50:55,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:50:55,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:55,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:50:55,107 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:50:55,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 16:50:55,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:50:55,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:50:55,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:50:55,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:50:55,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:55,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:55,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:55,666 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 119 treesize of output 75 [2022-03-15 16:50:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:55,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:50:56,311 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:50:56,311 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 215 treesize of output 153 [2022-03-15 16:50:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:56,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057443721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:50:56,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:50:56,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-03-15 16:50:56,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562785968] [2022-03-15 16:50:56,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:50:56,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:50:56,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:50:56,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:50:56,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:50:56,810 INFO L87 Difference]: Start difference. First operand 3168 states and 11351 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:51:00,411 INFO L93 Difference]: Finished difference Result 5039 states and 17072 transitions. [2022-03-15 16:51:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:51:00,411 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:51:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:51:00,421 INFO L225 Difference]: With dead ends: 5039 [2022-03-15 16:51:00,421 INFO L226 Difference]: Without dead ends: 5009 [2022-03-15 16:51:00,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=899, Invalid=5107, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:51:00,421 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 251 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:51:00,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 432 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1506 Invalid, 0 Unknown, 156 Unchecked, 0.8s Time] [2022-03-15 16:51:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2022-03-15 16:51:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 3194. [2022-03-15 16:51:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 3193 states have (on average 3.5797056060131536) internal successors, (11430), 3193 states have internal predecessors, (11430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:00,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 11430 transitions. [2022-03-15 16:51:00,481 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 11430 transitions. Word has length 26 [2022-03-15 16:51:00,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:51:00,481 INFO L470 AbstractCegarLoop]: Abstraction has 3194 states and 11430 transitions. [2022-03-15 16:51:00,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 11430 transitions. [2022-03-15 16:51:00,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:51:00,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:51:00,486 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] [2022-03-15 16:51:00,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-15 16:51:00,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-15 16:51:00,687 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:51:00,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:51:00,687 INFO L85 PathProgramCache]: Analyzing trace with hash -533725808, now seen corresponding path program 24 times [2022-03-15 16:51:00,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:51:00,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492473074] [2022-03-15 16:51:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:51:00,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:51:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:51:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:00,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:51:00,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492473074] [2022-03-15 16:51:00,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492473074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:51:00,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764397398] [2022-03-15 16:51:00,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:51:00,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:51:00,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:51:00,980 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:51:00,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 16:51:01,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:51:01,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:51:01,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:51:01,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:51:01,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:51:01,545 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 109 treesize of output 91 [2022-03-15 16:51:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:02,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:51:02,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:51:02,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:51:02,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:51:02,681 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 191 treesize of output 149 [2022-03-15 16:51:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:03,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764397398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:51:03,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:51:03,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-15 16:51:03,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872132951] [2022-03-15 16:51:03,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:51:03,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:51:03,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:51:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:51:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:51:03,443 INFO L87 Difference]: Start difference. First operand 3194 states and 11430 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:51:17,996 INFO L93 Difference]: Finished difference Result 7537 states and 24984 transitions. [2022-03-15 16:51:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-03-15 16:51:17,997 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:51:17,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:51:18,012 INFO L225 Difference]: With dead ends: 7537 [2022-03-15 16:51:18,012 INFO L226 Difference]: Without dead ends: 7492 [2022-03-15 16:51:18,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8971 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=3480, Invalid=18276, Unknown=0, NotChecked=0, Total=21756 [2022-03-15 16:51:18,013 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 756 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 973 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:51:18,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 824 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1881 Invalid, 0 Unknown, 973 Unchecked, 1.2s Time] [2022-03-15 16:51:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7492 states. [2022-03-15 16:51:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7492 to 3272. [2022-03-15 16:51:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 3271 states have (on average 3.5912564964842555) internal successors, (11747), 3271 states have internal predecessors, (11747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 11747 transitions. [2022-03-15 16:51:18,115 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 11747 transitions. Word has length 26 [2022-03-15 16:51:18,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:51:18,116 INFO L470 AbstractCegarLoop]: Abstraction has 3272 states and 11747 transitions. [2022-03-15 16:51:18,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 11747 transitions. [2022-03-15 16:51:18,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:51:18,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:51:18,121 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] [2022-03-15 16:51:18,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-15 16:51:18,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:51:18,332 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:51:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:51:18,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2027633530, now seen corresponding path program 25 times [2022-03-15 16:51:18,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:51:18,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754001464] [2022-03-15 16:51:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:51:18,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:51:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:51:18,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:18,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:51:18,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754001464] [2022-03-15 16:51:18,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754001464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:51:18,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886261778] [2022-03-15 16:51:18,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:51:18,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:51:18,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:51:18,603 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:51:18,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 16:51:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:51:18,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:51:18,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:51:19,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:51:19,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:51:19,220 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 109 treesize of output 75 [2022-03-15 16:51:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:19,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:51:19,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:51:19,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:51:19,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-15 16:51:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:21,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886261778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:51:21,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:51:21,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:51:21,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732561797] [2022-03-15 16:51:21,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:51:21,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:51:21,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:51:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:51:21,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:51:21,563 INFO L87 Difference]: Start difference. First operand 3272 states and 11747 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:25,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:51:25,993 INFO L93 Difference]: Finished difference Result 6753 states and 21979 transitions. [2022-03-15 16:51:25,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:51:25,993 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:51:25,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:51:26,007 INFO L225 Difference]: With dead ends: 6753 [2022-03-15 16:51:26,007 INFO L226 Difference]: Without dead ends: 6723 [2022-03-15 16:51:26,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1265, Invalid=4285, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:51:26,008 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 575 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:51:26,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 378 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1296 Invalid, 0 Unknown, 144 Unchecked, 0.8s Time] [2022-03-15 16:51:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6723 states. [2022-03-15 16:51:26,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6723 to 3341. [2022-03-15 16:51:26,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 3.5994011976047906) internal successors, (12022), 3340 states have internal predecessors, (12022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:26,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 12022 transitions. [2022-03-15 16:51:26,111 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 12022 transitions. Word has length 26 [2022-03-15 16:51:26,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:51:26,111 INFO L470 AbstractCegarLoop]: Abstraction has 3341 states and 12022 transitions. [2022-03-15 16:51:26,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:26,111 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 12022 transitions. [2022-03-15 16:51:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:51:26,116 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:51:26,116 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] [2022-03-15 16:51:26,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-15 16:51:26,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-15 16:51:26,317 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:51:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:51:26,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1623096648, now seen corresponding path program 26 times [2022-03-15 16:51:26,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:51:26,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995225485] [2022-03-15 16:51:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:51:26,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:51:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:51:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:26,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:51:26,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995225485] [2022-03-15 16:51:26,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995225485] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:51:26,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348615214] [2022-03-15 16:51:26,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:51:26,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:51:26,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:51:26,589 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:51:26,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 16:51:26,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:51:26,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:51:26,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:51:26,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:51:27,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:51:27,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:51:27,348 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 109 treesize of output 91 [2022-03-15 16:51:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:28,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:51:28,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:51:28,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:51:28,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:51:28,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 145 [2022-03-15 16:51:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:29,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348615214] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:51:29,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:51:29,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-15 16:51:29,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658883856] [2022-03-15 16:51:29,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:51:29,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:51:29,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:51:29,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:51:29,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:51:29,447 INFO L87 Difference]: Start difference. First operand 3341 states and 12022 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:51:41,981 INFO L93 Difference]: Finished difference Result 8123 states and 27089 transitions. [2022-03-15 16:51:41,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-15 16:51:41,981 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:51:41,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:51:41,997 INFO L225 Difference]: With dead ends: 8123 [2022-03-15 16:51:41,997 INFO L226 Difference]: Without dead ends: 8055 [2022-03-15 16:51:41,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9366 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=3585, Invalid=19367, Unknown=0, NotChecked=0, Total=22952 [2022-03-15 16:51:41,999 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 780 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 3322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1331 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:51:41,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 824 Invalid, 3322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1852 Invalid, 0 Unknown, 1331 Unchecked, 1.2s Time] [2022-03-15 16:51:42,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8055 states. [2022-03-15 16:51:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8055 to 3345. [2022-03-15 16:51:42,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3345 states, 3344 states have (on average 3.598385167464115) internal successors, (12033), 3344 states have internal predecessors, (12033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:42,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3345 states to 3345 states and 12033 transitions. [2022-03-15 16:51:42,118 INFO L78 Accepts]: Start accepts. Automaton has 3345 states and 12033 transitions. Word has length 26 [2022-03-15 16:51:42,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:51:42,118 INFO L470 AbstractCegarLoop]: Abstraction has 3345 states and 12033 transitions. [2022-03-15 16:51:42,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:42,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3345 states and 12033 transitions. [2022-03-15 16:51:42,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:51:42,123 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:51:42,123 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] [2022-03-15 16:51:42,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-15 16:51:42,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 16:51:42,339 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:51:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:51:42,340 INFO L85 PathProgramCache]: Analyzing trace with hash -437763154, now seen corresponding path program 27 times [2022-03-15 16:51:42,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:51:42,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883105160] [2022-03-15 16:51:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:51:42,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:51:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:51:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:42,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:51:42,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883105160] [2022-03-15 16:51:42,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883105160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:51:42,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564579078] [2022-03-15 16:51:42,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:51:42,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:51:42,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:51:42,605 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:51:42,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 16:51:42,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:51:42,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:51:42,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:51:42,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:51:45,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:51:45,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:51:45,075 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 109 treesize of output 75 [2022-03-15 16:51:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:45,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:51:45,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:51:45,693 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 175 treesize of output 161 [2022-03-15 16:51:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:48,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564579078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:51:48,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:51:48,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:51:48,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026994191] [2022-03-15 16:51:48,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:51:48,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:51:48,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:51:48,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:51:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:51:48,633 INFO L87 Difference]: Start difference. First operand 3345 states and 12033 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:52,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:51:52,431 INFO L93 Difference]: Finished difference Result 6473 states and 21339 transitions. [2022-03-15 16:51:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:51:52,431 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:51:52,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:51:52,444 INFO L225 Difference]: With dead ends: 6473 [2022-03-15 16:51:52,444 INFO L226 Difference]: Without dead ends: 6443 [2022-03-15 16:51:52,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1253, Invalid=4297, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:51:52,445 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 476 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:51:52,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 311 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 938 Invalid, 0 Unknown, 431 Unchecked, 0.6s Time] [2022-03-15 16:51:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6443 states. [2022-03-15 16:51:52,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6443 to 3353. [2022-03-15 16:51:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 3.600238663484487) internal successors, (12068), 3352 states have internal predecessors, (12068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 12068 transitions. [2022-03-15 16:51:52,518 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 12068 transitions. Word has length 26 [2022-03-15 16:51:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:51:52,518 INFO L470 AbstractCegarLoop]: Abstraction has 3353 states and 12068 transitions. [2022-03-15 16:51:52,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:51:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 12068 transitions. [2022-03-15 16:51:52,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:51:52,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:51:52,523 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] [2022-03-15 16:51:52,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-15 16:51:52,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 16:51:52,724 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:51:52,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:51:52,724 INFO L85 PathProgramCache]: Analyzing trace with hash 238453832, now seen corresponding path program 28 times [2022-03-15 16:51:52,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:51:52,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413083700] [2022-03-15 16:51:52,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:51:52,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:51:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:51:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:52,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:51:52,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413083700] [2022-03-15 16:51:52,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413083700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:51:52,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982980601] [2022-03-15 16:51:52,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:51:52,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:51:52,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:51:52,965 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:51:52,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 16:51:52,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:51:52,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:51:52,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:51:52,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:51:53,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:51:53,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:51:53,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:51:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:53,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:51:54,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:51:54,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:51:54,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-15 16:51:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:51:55,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982980601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:51:55,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:51:55,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 16:51:55,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268431729] [2022-03-15 16:51:55,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:51:55,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:51:55,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:51:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:51:55,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:51:55,799 INFO L87 Difference]: Start difference. First operand 3353 states and 12068 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-03-15 16:52:01,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:52:01,411 INFO L93 Difference]: Finished difference Result 7160 states and 23432 transitions. [2022-03-15 16:52:01,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:52:01,411 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-03-15 16:52:01,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:52:01,424 INFO L225 Difference]: With dead ends: 7160 [2022-03-15 16:52:01,424 INFO L226 Difference]: Without dead ends: 7122 [2022-03-15 16:52:01,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1460, Invalid=5020, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:52:01,425 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 574 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:52:01,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 448 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1416 Invalid, 0 Unknown, 286 Unchecked, 0.9s Time] [2022-03-15 16:52:01,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2022-03-15 16:52:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 3346. [2022-03-15 16:52:01,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3346 states, 3345 states have (on average 3.5961136023916294) internal successors, (12029), 3345 states have internal predecessors, (12029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:52:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3346 states to 3346 states and 12029 transitions. [2022-03-15 16:52:01,523 INFO L78 Accepts]: Start accepts. Automaton has 3346 states and 12029 transitions. Word has length 26 [2022-03-15 16:52:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:52:01,523 INFO L470 AbstractCegarLoop]: Abstraction has 3346 states and 12029 transitions. [2022-03-15 16:52:01,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-03-15 16:52:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3346 states and 12029 transitions. [2022-03-15 16:52:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:52:01,529 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:52:01,529 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] [2022-03-15 16:52:01,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-15 16:52:01,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-03-15 16:52:01,729 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:52:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:52:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1198785412, now seen corresponding path program 29 times [2022-03-15 16:52:01,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:52:01,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324067519] [2022-03-15 16:52:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:52:01,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:52:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:52:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:02,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:52:02,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324067519] [2022-03-15 16:52:02,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324067519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:52:02,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430003302] [2022-03-15 16:52:02,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:52:02,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:52:02,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:52:02,034 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:52:02,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 16:52:02,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:52:02,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:52:02,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:52:02,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:52:02,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:52:02,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:52:02,618 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 109 treesize of output 75 [2022-03-15 16:52:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:02,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:52:03,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:52:03,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:52:03,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-15 16:52:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:04,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430003302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:52:04,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:52:04,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-15 16:52:04,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703060385] [2022-03-15 16:52:04,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:52:04,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:52:04,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:52:04,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:52:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:52:04,705 INFO L87 Difference]: Start difference. First operand 3346 states and 12029 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:52:12,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:52:12,917 INFO L93 Difference]: Finished difference Result 7996 states and 25854 transitions. [2022-03-15 16:52:12,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-15 16:52:12,918 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:52:12,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:52:12,932 INFO L225 Difference]: With dead ends: 7996 [2022-03-15 16:52:12,932 INFO L226 Difference]: Without dead ends: 7947 [2022-03-15 16:52:12,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4169 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1812, Invalid=8900, Unknown=0, NotChecked=0, Total=10712 [2022-03-15 16:52:12,933 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 651 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 755 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:52:12,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 373 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 956 Invalid, 0 Unknown, 755 Unchecked, 0.7s Time] [2022-03-15 16:52:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2022-03-15 16:52:13,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 3417. [2022-03-15 16:52:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 3.5992388758782203) internal successors, (12295), 3416 states have internal predecessors, (12295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:52:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 12295 transitions. [2022-03-15 16:52:13,029 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 12295 transitions. Word has length 26 [2022-03-15 16:52:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:52:13,029 INFO L470 AbstractCegarLoop]: Abstraction has 3417 states and 12295 transitions. [2022-03-15 16:52:13,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:52:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 12295 transitions. [2022-03-15 16:52:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:52:13,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:52:13,034 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] [2022-03-15 16:52:13,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-15 16:52:13,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:52:13,239 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:52:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:52:13,240 INFO L85 PathProgramCache]: Analyzing trace with hash -418747368, now seen corresponding path program 30 times [2022-03-15 16:52:13,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:52:13,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933112602] [2022-03-15 16:52:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:52:13,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:52:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:52:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:13,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:52:13,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933112602] [2022-03-15 16:52:13,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933112602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:52:13,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029259957] [2022-03-15 16:52:13,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:52:13,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:52:13,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:52:13,494 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:52:13,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 16:52:13,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:52:13,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:52:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:52:13,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:52:13,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:52:13,911 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 109 treesize of output 91 [2022-03-15 16:52:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:14,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:52:15,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:52:15,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:52:15,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:52:15,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-03-15 16:52:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:15,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029259957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:52:15,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:52:15,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-15 16:52:15,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960770707] [2022-03-15 16:52:15,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:52:15,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:52:15,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:52:15,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:52:15,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:52:15,564 INFO L87 Difference]: Start difference. First operand 3417 states and 12295 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:52:23,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:52:23,693 INFO L93 Difference]: Finished difference Result 7276 states and 24405 transitions. [2022-03-15 16:52:23,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 16:52:23,693 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:52:23,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:52:23,709 INFO L225 Difference]: With dead ends: 7276 [2022-03-15 16:52:23,709 INFO L226 Difference]: Without dead ends: 7232 [2022-03-15 16:52:23,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3275 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1805, Invalid=8295, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 16:52:23,710 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 687 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 712 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:52:23,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 513 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1381 Invalid, 0 Unknown, 712 Unchecked, 0.9s Time] [2022-03-15 16:52:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2022-03-15 16:52:23,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 3418. [2022-03-15 16:52:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3418 states, 3417 states have (on average 3.5958443078724027) internal successors, (12287), 3417 states have internal predecessors, (12287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:52:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 12287 transitions. [2022-03-15 16:52:23,810 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 12287 transitions. Word has length 26 [2022-03-15 16:52:23,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:52:23,810 INFO L470 AbstractCegarLoop]: Abstraction has 3418 states and 12287 transitions. [2022-03-15 16:52:23,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:52:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 12287 transitions. [2022-03-15 16:52:23,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:52:23,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:52:23,816 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] [2022-03-15 16:52:23,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-15 16:52:24,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:52:24,017 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:52:24,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:52:24,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1619324944, now seen corresponding path program 31 times [2022-03-15 16:52:24,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:52:24,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195691901] [2022-03-15 16:52:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:52:24,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:52:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:52:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:24,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:52:24,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195691901] [2022-03-15 16:52:24,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195691901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:52:24,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068465286] [2022-03-15 16:52:24,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:52:24,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:52:24,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:52:24,296 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:52:24,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 16:52:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:52:24,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:52:24,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:52:24,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:52:24,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:52:24,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:52:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:25,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:52:25,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:52:25,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:52:25,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 169 [2022-03-15 16:52:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:26,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068465286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:52:26,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:52:26,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 16:52:26,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523616341] [2022-03-15 16:52:26,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:52:26,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:52:26,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:52:26,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:52:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:52:26,919 INFO L87 Difference]: Start difference. First operand 3418 states and 12287 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-03-15 16:52:30,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:52:30,984 INFO L93 Difference]: Finished difference Result 6505 states and 21480 transitions. [2022-03-15 16:52:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:52:30,984 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-03-15 16:52:30,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:52:30,996 INFO L225 Difference]: With dead ends: 6505 [2022-03-15 16:52:30,997 INFO L226 Difference]: Without dead ends: 6391 [2022-03-15 16:52:30,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=963, Invalid=4007, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:52:30,997 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 520 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 443 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:52:30,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 370 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 989 Invalid, 0 Unknown, 443 Unchecked, 0.6s Time] [2022-03-15 16:52:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6391 states. [2022-03-15 16:52:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6391 to 3427. [2022-03-15 16:52:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 3.5986573263280794) internal successors, (12329), 3426 states have internal predecessors, (12329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:52:31,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 12329 transitions. [2022-03-15 16:52:31,066 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 12329 transitions. Word has length 26 [2022-03-15 16:52:31,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:52:31,066 INFO L470 AbstractCegarLoop]: Abstraction has 3427 states and 12329 transitions. [2022-03-15 16:52:31,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-03-15 16:52:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 12329 transitions. [2022-03-15 16:52:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:52:31,071 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:52:31,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:52:31,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-15 16:52:31,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:52:31,279 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:52:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:52:31,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1873169776, now seen corresponding path program 41 times [2022-03-15 16:52:31,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:52:31,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128477082] [2022-03-15 16:52:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:52:31,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:52:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:52:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:31,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:52:31,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128477082] [2022-03-15 16:52:31,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128477082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:52:31,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302046983] [2022-03-15 16:52:31,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:52:31,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:52:31,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:52:31,534 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:52:31,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 16:52:31,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:52:31,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:52:31,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:52:31,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:52:32,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:52:32,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:52:32,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:52:32,117 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 115 treesize of output 75 [2022-03-15 16:52:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:32,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:52:32,667 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:52:32,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 149 [2022-03-15 16:52:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:33,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302046983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:52:33,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:52:33,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-15 16:52:33,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965277096] [2022-03-15 16:52:33,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:52:33,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:52:33,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:52:33,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:52:33,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:52:33,138 INFO L87 Difference]: Start difference. First operand 3427 states and 12329 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:52:37,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:52:37,725 INFO L93 Difference]: Finished difference Result 5505 states and 18677 transitions. [2022-03-15 16:52:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:52:37,725 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:52:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:52:37,736 INFO L225 Difference]: With dead ends: 5505 [2022-03-15 16:52:37,736 INFO L226 Difference]: Without dead ends: 5396 [2022-03-15 16:52:37,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=956, Invalid=5206, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 16:52:37,736 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 301 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:52:37,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 471 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 16:52:37,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5396 states. [2022-03-15 16:52:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5396 to 3452. [2022-03-15 16:52:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.5957693422196466) internal successors, (12409), 3451 states have internal predecessors, (12409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:52:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 12409 transitions. [2022-03-15 16:52:37,797 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 12409 transitions. Word has length 26 [2022-03-15 16:52:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:52:37,797 INFO L470 AbstractCegarLoop]: Abstraction has 3452 states and 12409 transitions. [2022-03-15 16:52:37,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:52:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 12409 transitions. [2022-03-15 16:52:37,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:52:37,802 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:52:37,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:52:37,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-15 16:52:38,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-15 16:52:38,003 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:52:38,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:52:38,003 INFO L85 PathProgramCache]: Analyzing trace with hash 471026418, now seen corresponding path program 42 times [2022-03-15 16:52:38,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:52:38,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659532688] [2022-03-15 16:52:38,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:52:38,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:52:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:52:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:38,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:52:38,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659532688] [2022-03-15 16:52:38,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659532688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:52:38,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097696176] [2022-03-15 16:52:38,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:52:38,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:52:38,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:52:38,232 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:52:38,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 16:52:38,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:52:38,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:52:38,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:52:38,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:52:38,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:52:38,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:52:38,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:52:38,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 101 [2022-03-15 16:52:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:39,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:52:39,493 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:52:39,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-15 16:52:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:39,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097696176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:52:39,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:52:39,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-15 16:52:39,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871713896] [2022-03-15 16:52:39,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:52:39,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:52:39,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:52:39,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:52:39,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:52:39,949 INFO L87 Difference]: Start difference. First operand 3452 states and 12409 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:52:48,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:52:48,676 INFO L93 Difference]: Finished difference Result 7542 states and 25144 transitions. [2022-03-15 16:52:48,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-15 16:52:48,677 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:52:48,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:52:48,691 INFO L225 Difference]: With dead ends: 7542 [2022-03-15 16:52:48,692 INFO L226 Difference]: Without dead ends: 7498 [2022-03-15 16:52:48,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6230 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=3037, Invalid=12965, Unknown=0, NotChecked=0, Total=16002 [2022-03-15 16:52:48,692 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 599 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 2053 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:52:48,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 517 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2053 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:52:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7498 states. [2022-03-15 16:52:48,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7498 to 3469. [2022-03-15 16:52:48,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3469 states, 3468 states have (on average 3.5980392156862746) internal successors, (12478), 3468 states have internal predecessors, (12478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:52:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3469 states to 3469 states and 12478 transitions. [2022-03-15 16:52:48,776 INFO L78 Accepts]: Start accepts. Automaton has 3469 states and 12478 transitions. Word has length 26 [2022-03-15 16:52:48,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:52:48,776 INFO L470 AbstractCegarLoop]: Abstraction has 3469 states and 12478 transitions. [2022-03-15 16:52:48,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:52:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3469 states and 12478 transitions. [2022-03-15 16:52:48,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:52:48,781 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:52:48,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:52:48,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-15 16:52:48,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:52:48,982 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:52:48,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:52:48,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1954161356, now seen corresponding path program 43 times [2022-03-15 16:52:48,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:52:48,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996821220] [2022-03-15 16:52:48,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:52:48,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:52:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:52:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:49,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:52:49,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996821220] [2022-03-15 16:52:49,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996821220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:52:49,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935392431] [2022-03-15 16:52:49,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:52:49,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:52:49,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:52:49,237 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:52:49,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 16:52:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:52:49,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:52:49,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:52:49,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:52:49,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:52:49,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:52:49,710 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 121 treesize of output 75 [2022-03-15 16:52:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:49,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:52:50,224 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:52:50,224 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 211 treesize of output 149 [2022-03-15 16:52:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:52:50,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935392431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:52:50,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:52:50,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-15 16:52:50,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136848610] [2022-03-15 16:52:50,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:52:50,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:52:50,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:52:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:52:50,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:52:50,705 INFO L87 Difference]: Start difference. First operand 3469 states and 12478 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:00,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:53:00,395 INFO L93 Difference]: Finished difference Result 7093 states and 23466 transitions. [2022-03-15 16:53:00,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-15 16:53:00,395 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:53:00,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:53:00,408 INFO L225 Difference]: With dead ends: 7093 [2022-03-15 16:53:00,408 INFO L226 Difference]: Without dead ends: 7063 [2022-03-15 16:53:00,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8850 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=3254, Invalid=17626, Unknown=0, NotChecked=0, Total=20880 [2022-03-15 16:53:00,410 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 468 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 2386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:53:00,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 690 Invalid, 2386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2010 Invalid, 0 Unknown, 201 Unchecked, 1.1s Time] [2022-03-15 16:53:00,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7063 states. [2022-03-15 16:53:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7063 to 3468. [2022-03-15 16:53:00,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 3467 states have (on average 3.5976348428035765) internal successors, (12473), 3467 states have internal predecessors, (12473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 12473 transitions. [2022-03-15 16:53:00,488 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 12473 transitions. Word has length 26 [2022-03-15 16:53:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:53:00,488 INFO L470 AbstractCegarLoop]: Abstraction has 3468 states and 12473 transitions. [2022-03-15 16:53:00,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 12473 transitions. [2022-03-15 16:53:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:53:00,493 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:53:00,493 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] [2022-03-15 16:53:00,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-15 16:53:00,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:53:00,694 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:53:00,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:53:00,694 INFO L85 PathProgramCache]: Analyzing trace with hash -688173796, now seen corresponding path program 32 times [2022-03-15 16:53:00,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:53:00,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747472165] [2022-03-15 16:53:00,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:53:00,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:53:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:53:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:01,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:53:01,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747472165] [2022-03-15 16:53:01,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747472165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:53:01,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155612119] [2022-03-15 16:53:01,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:53:01,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:53:01,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:53:01,023 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:53:01,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 16:53:01,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:53:01,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:53:01,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:53:01,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:53:04,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:53:04,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:53:04,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:53:04,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:53:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:04,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:53:05,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:53:05,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:53:05,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:53:05,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 145 [2022-03-15 16:53:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:06,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155612119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:53:06,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:53:06,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-03-15 16:53:06,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496361439] [2022-03-15 16:53:06,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:53:06,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:53:06,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:53:06,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:53:06,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:53:06,016 INFO L87 Difference]: Start difference. First operand 3468 states and 12473 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:53:11,998 INFO L93 Difference]: Finished difference Result 6642 states and 22406 transitions. [2022-03-15 16:53:11,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 16:53:11,998 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:53:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:53:12,011 INFO L225 Difference]: With dead ends: 6642 [2022-03-15 16:53:12,011 INFO L226 Difference]: Without dead ends: 6628 [2022-03-15 16:53:12,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2763 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1157, Invalid=7215, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 16:53:12,012 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 409 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:53:12,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 409 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 949 Invalid, 0 Unknown, 411 Unchecked, 0.6s Time] [2022-03-15 16:53:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6628 states. [2022-03-15 16:53:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6628 to 3624. [2022-03-15 16:53:12,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3623 states have (on average 3.592602815346398) internal successors, (13016), 3623 states have internal predecessors, (13016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:12,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 13016 transitions. [2022-03-15 16:53:12,093 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 13016 transitions. Word has length 26 [2022-03-15 16:53:12,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:53:12,093 INFO L470 AbstractCegarLoop]: Abstraction has 3624 states and 13016 transitions. [2022-03-15 16:53:12,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:12,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 13016 transitions. [2022-03-15 16:53:12,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:53:12,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:53:12,099 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] [2022-03-15 16:53:12,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-15 16:53:12,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-15 16:53:12,300 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:53:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:53:12,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1034669180, now seen corresponding path program 33 times [2022-03-15 16:53:12,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:53:12,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490550130] [2022-03-15 16:53:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:53:12,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:53:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:53:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:12,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:53:12,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490550130] [2022-03-15 16:53:12,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490550130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:53:12,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456011002] [2022-03-15 16:53:12,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:53:12,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:53:12,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:53:12,646 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:53:12,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 16:53:12,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:53:12,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:53:12,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:53:12,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:53:13,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:53:13,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:53:13,844 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 109 treesize of output 75 [2022-03-15 16:53:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:13,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:53:14,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:53:14,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 165 [2022-03-15 16:53:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:18,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456011002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:53:18,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:53:18,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-03-15 16:53:18,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089252061] [2022-03-15 16:53:18,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:53:18,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:53:18,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:53:18,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:53:18,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:53:18,226 INFO L87 Difference]: Start difference. First operand 3624 states and 13016 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:24,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:53:24,291 INFO L93 Difference]: Finished difference Result 7436 states and 24638 transitions. [2022-03-15 16:53:24,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 16:53:24,291 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:53:24,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:53:24,305 INFO L225 Difference]: With dead ends: 7436 [2022-03-15 16:53:24,305 INFO L226 Difference]: Without dead ends: 7394 [2022-03-15 16:53:24,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1359, Invalid=7013, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 16:53:24,306 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 394 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:53:24,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 443 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1268 Invalid, 0 Unknown, 347 Unchecked, 0.8s Time] [2022-03-15 16:53:24,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7394 states. [2022-03-15 16:53:24,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7394 to 3587. [2022-03-15 16:53:24,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 3.593418851087563) internal successors, (12886), 3586 states have internal predecessors, (12886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:24,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 12886 transitions. [2022-03-15 16:53:24,383 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 12886 transitions. Word has length 26 [2022-03-15 16:53:24,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:53:24,383 INFO L470 AbstractCegarLoop]: Abstraction has 3587 states and 12886 transitions. [2022-03-15 16:53:24,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:24,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 12886 transitions. [2022-03-15 16:53:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:53:24,388 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:53:24,388 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] [2022-03-15 16:53:24,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-15 16:53:24,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-15 16:53:24,589 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:53:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:53:24,589 INFO L85 PathProgramCache]: Analyzing trace with hash 44324108, now seen corresponding path program 34 times [2022-03-15 16:53:24,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:53:24,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630141737] [2022-03-15 16:53:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:53:24,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:53:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:53:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:24,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:53:24,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630141737] [2022-03-15 16:53:24,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630141737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:53:24,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817718639] [2022-03-15 16:53:24,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:53:24,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:53:24,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:53:24,879 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:53:24,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 16:53:24,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:53:24,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:53:24,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:53:24,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:53:26,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:53:26,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:53:26,657 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 109 treesize of output 75 [2022-03-15 16:53:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:26,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:53:27,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:53:27,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 161 [2022-03-15 16:53:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:29,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817718639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:53:29,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:53:29,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:53:29,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578657502] [2022-03-15 16:53:29,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:53:29,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:53:29,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:53:29,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:53:29,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:53:29,602 INFO L87 Difference]: Start difference. First operand 3587 states and 12886 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:32,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:53:32,321 INFO L93 Difference]: Finished difference Result 5901 states and 19840 transitions. [2022-03-15 16:53:32,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:53:32,321 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:53:32,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:53:32,332 INFO L225 Difference]: With dead ends: 5901 [2022-03-15 16:53:32,333 INFO L226 Difference]: Without dead ends: 5853 [2022-03-15 16:53:32,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=744, Invalid=3288, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:53:32,333 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 339 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:53:32,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 274 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 750 Invalid, 0 Unknown, 187 Unchecked, 0.5s Time] [2022-03-15 16:53:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5853 states. [2022-03-15 16:53:32,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5853 to 3548. [2022-03-15 16:53:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3548 states, 3547 states have (on average 3.5934592613476175) internal successors, (12746), 3547 states have internal predecessors, (12746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 12746 transitions. [2022-03-15 16:53:32,399 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 12746 transitions. Word has length 26 [2022-03-15 16:53:32,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:53:32,399 INFO L470 AbstractCegarLoop]: Abstraction has 3548 states and 12746 transitions. [2022-03-15 16:53:32,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 12746 transitions. [2022-03-15 16:53:32,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:53:32,405 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:53:32,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:53:32,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-15 16:53:32,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:53:32,605 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:53:32,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:53:32,605 INFO L85 PathProgramCache]: Analyzing trace with hash -34983442, now seen corresponding path program 44 times [2022-03-15 16:53:32,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:53:32,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366648406] [2022-03-15 16:53:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:53:32,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:53:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:53:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:32,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:53:32,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366648406] [2022-03-15 16:53:32,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366648406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:53:32,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583353711] [2022-03-15 16:53:32,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:53:32,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:53:32,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:53:32,816 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:53:32,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 16:53:32,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:53:32,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:53:32,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:53:32,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:53:33,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:53:33,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:53:33,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:53:33,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 75 [2022-03-15 16:53:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:33,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:53:33,868 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:53:33,869 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 211 treesize of output 149 [2022-03-15 16:53:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:34,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583353711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:53:34,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:53:34,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-15 16:53:34,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262685484] [2022-03-15 16:53:34,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:53:34,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:53:34,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:53:34,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:53:34,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:53:34,436 INFO L87 Difference]: Start difference. First operand 3548 states and 12746 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:53:44,777 INFO L93 Difference]: Finished difference Result 7777 states and 25472 transitions. [2022-03-15 16:53:44,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-15 16:53:44,777 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:53:44,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:53:44,793 INFO L225 Difference]: With dead ends: 7777 [2022-03-15 16:53:44,793 INFO L226 Difference]: Without dead ends: 7747 [2022-03-15 16:53:44,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9172 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3180, Invalid=20076, Unknown=0, NotChecked=0, Total=23256 [2022-03-15 16:53:44,795 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 613 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 2661 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:53:44,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 715 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2661 Invalid, 0 Unknown, 104 Unchecked, 1.4s Time] [2022-03-15 16:53:44,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7747 states. [2022-03-15 16:53:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7747 to 3548. [2022-03-15 16:53:44,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3548 states, 3547 states have (on average 3.595150831688751) internal successors, (12752), 3547 states have internal predecessors, (12752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 12752 transitions. [2022-03-15 16:53:44,927 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 12752 transitions. Word has length 26 [2022-03-15 16:53:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:53:44,927 INFO L470 AbstractCegarLoop]: Abstraction has 3548 states and 12752 transitions. [2022-03-15 16:53:44,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 12752 transitions. [2022-03-15 16:53:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:53:44,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:53:44,932 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] [2022-03-15 16:53:44,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-15 16:53:45,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:53:45,133 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:53:45,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:53:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash -984788936, now seen corresponding path program 35 times [2022-03-15 16:53:45,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:53:45,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403278316] [2022-03-15 16:53:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:53:45,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:53:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:53:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:45,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:53:45,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403278316] [2022-03-15 16:53:45,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403278316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:53:45,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148100498] [2022-03-15 16:53:45,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:53:45,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:53:45,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:53:45,335 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:53:45,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 16:53:45,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:53:45,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:53:45,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:53:45,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:53:45,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:53:45,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:53:45,826 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 109 treesize of output 75 [2022-03-15 16:53:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:45,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:53:46,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:53:46,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:53:46,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-03-15 16:53:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:47,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148100498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:53:47,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:53:47,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 16:53:47,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970161780] [2022-03-15 16:53:47,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:53:47,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:53:47,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:53:47,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:53:47,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:53:47,683 INFO L87 Difference]: Start difference. First operand 3548 states and 12752 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:55,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:53:55,898 INFO L93 Difference]: Finished difference Result 6318 states and 20736 transitions. [2022-03-15 16:53:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-15 16:53:55,899 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:53:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:53:55,911 INFO L225 Difference]: With dead ends: 6318 [2022-03-15 16:53:55,912 INFO L226 Difference]: Without dead ends: 6224 [2022-03-15 16:53:55,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5170 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2018, Invalid=12988, Unknown=0, NotChecked=0, Total=15006 [2022-03-15 16:53:55,912 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 444 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:53:55,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 566 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 16:53:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6224 states. [2022-03-15 16:53:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6224 to 3629. [2022-03-15 16:53:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3628 states have (on average 3.59013230429989) internal successors, (13025), 3628 states have internal predecessors, (13025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 13025 transitions. [2022-03-15 16:53:55,983 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 13025 transitions. Word has length 26 [2022-03-15 16:53:55,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:53:55,983 INFO L470 AbstractCegarLoop]: Abstraction has 3629 states and 13025 transitions. [2022-03-15 16:53:55,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:53:55,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 13025 transitions. [2022-03-15 16:53:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:53:55,988 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:53:55,988 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] [2022-03-15 16:53:56,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-15 16:53:56,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-15 16:53:56,196 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:53:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:53:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash -655629364, now seen corresponding path program 36 times [2022-03-15 16:53:56,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:53:56,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689813961] [2022-03-15 16:53:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:53:56,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:53:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:53:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:56,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:53:56,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689813961] [2022-03-15 16:53:56,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689813961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:53:56,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206985688] [2022-03-15 16:53:56,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:53:56,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:53:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:53:56,379 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:53:56,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 16:53:56,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:53:56,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:53:56,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:53:56,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:53:56,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:53:56,894 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 109 treesize of output 91 [2022-03-15 16:53:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:57,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:53:57,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:53:57,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:53:57,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:53:57,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-03-15 16:53:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:53:58,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206985688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:53:58,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:53:58,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-15 16:53:58,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36789955] [2022-03-15 16:53:58,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:53:58,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:53:58,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:53:58,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:53:58,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:53:58,656 INFO L87 Difference]: Start difference. First operand 3629 states and 13025 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:54:05,572 INFO L93 Difference]: Finished difference Result 6688 states and 22516 transitions. [2022-03-15 16:54:05,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 16:54:05,572 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:54:05,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:54:05,585 INFO L225 Difference]: With dead ends: 6688 [2022-03-15 16:54:05,586 INFO L226 Difference]: Without dead ends: 6652 [2022-03-15 16:54:05,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1146, Invalid=5496, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 16:54:05,586 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 560 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 2496 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:54:05,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 465 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2496 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 16:54:05,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6652 states. [2022-03-15 16:54:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6652 to 3635. [2022-03-15 16:54:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3635 states, 3634 states have (on average 3.592184920198129) internal successors, (13054), 3634 states have internal predecessors, (13054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3635 states to 3635 states and 13054 transitions. [2022-03-15 16:54:05,672 INFO L78 Accepts]: Start accepts. Automaton has 3635 states and 13054 transitions. Word has length 26 [2022-03-15 16:54:05,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:54:05,673 INFO L470 AbstractCegarLoop]: Abstraction has 3635 states and 13054 transitions. [2022-03-15 16:54:05,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:05,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3635 states and 13054 transitions. [2022-03-15 16:54:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:54:05,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:54:05,678 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] [2022-03-15 16:54:05,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-15 16:54:05,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:54:05,879 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:54:05,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:54:05,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1914635640, now seen corresponding path program 37 times [2022-03-15 16:54:05,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:54:05,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328106097] [2022-03-15 16:54:05,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:54:05,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:54:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:54:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:06,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:54:06,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328106097] [2022-03-15 16:54:06,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328106097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:54:06,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479405948] [2022-03-15 16:54:06,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:54:06,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:54:06,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:54:06,102 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:54:06,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 16:54:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:54:06,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:54:06,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:54:06,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:54:06,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:54:06,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:54:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:06,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:54:07,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:54:07,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:54:07,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 209 treesize of output 171 [2022-03-15 16:54:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:08,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479405948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:54:08,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:54:08,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 16:54:08,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657881446] [2022-03-15 16:54:08,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:54:08,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:54:08,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:54:08,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:54:08,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:54:08,277 INFO L87 Difference]: Start difference. First operand 3635 states and 13054 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:11,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:54:11,254 INFO L93 Difference]: Finished difference Result 6217 states and 21011 transitions. [2022-03-15 16:54:11,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:54:11,254 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:54:11,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:54:11,267 INFO L225 Difference]: With dead ends: 6217 [2022-03-15 16:54:11,267 INFO L226 Difference]: Without dead ends: 6166 [2022-03-15 16:54:11,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=651, Invalid=2655, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:54:11,268 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 326 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:54:11,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 311 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:54:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6166 states. [2022-03-15 16:54:11,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6166 to 3661. [2022-03-15 16:54:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3661 states, 3660 states have (on average 3.596448087431694) internal successors, (13163), 3660 states have internal predecessors, (13163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 13163 transitions. [2022-03-15 16:54:11,351 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 13163 transitions. Word has length 26 [2022-03-15 16:54:11,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:54:11,351 INFO L470 AbstractCegarLoop]: Abstraction has 3661 states and 13163 transitions. [2022-03-15 16:54:11,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:11,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 13163 transitions. [2022-03-15 16:54:11,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:54:11,357 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:54:11,357 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] [2022-03-15 16:54:11,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-15 16:54:11,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:54:11,557 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:54:11,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:54:11,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1883610296, now seen corresponding path program 38 times [2022-03-15 16:54:11,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:54:11,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870971037] [2022-03-15 16:54:11,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:54:11,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:54:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:54:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:11,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:54:11,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870971037] [2022-03-15 16:54:11,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870971037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:54:11,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118510260] [2022-03-15 16:54:11,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:54:11,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:54:11,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:54:11,767 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:54:11,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 16:54:11,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:54:11,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:54:11,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:54:11,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:54:12,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:54:12,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:54:12,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:54:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:12,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:54:12,957 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:54:12,957 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 187 treesize of output 157 [2022-03-15 16:54:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:14,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118510260] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:54:14,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:54:14,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-15 16:54:14,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70364505] [2022-03-15 16:54:14,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:54:14,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:54:14,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:54:14,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:54:14,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:54:14,822 INFO L87 Difference]: Start difference. First operand 3661 states and 13163 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:18,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:54:18,852 INFO L93 Difference]: Finished difference Result 6517 states and 21971 transitions. [2022-03-15 16:54:18,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 16:54:18,852 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:54:18,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:54:18,864 INFO L225 Difference]: With dead ends: 6517 [2022-03-15 16:54:18,864 INFO L226 Difference]: Without dead ends: 6472 [2022-03-15 16:54:18,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=953, Invalid=5527, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:54:18,865 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 328 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:54:18,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 511 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1986 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:54:18,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6472 states. [2022-03-15 16:54:18,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6472 to 3665. [2022-03-15 16:54:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3664 states have (on average 3.595796943231441) internal successors, (13175), 3664 states have internal predecessors, (13175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:18,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 13175 transitions. [2022-03-15 16:54:18,934 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 13175 transitions. Word has length 26 [2022-03-15 16:54:18,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:54:18,934 INFO L470 AbstractCegarLoop]: Abstraction has 3665 states and 13175 transitions. [2022-03-15 16:54:18,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 13175 transitions. [2022-03-15 16:54:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:54:18,939 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:54:18,939 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] [2022-03-15 16:54:18,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-15 16:54:19,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-15 16:54:19,140 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:54:19,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:54:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash -216803376, now seen corresponding path program 39 times [2022-03-15 16:54:19,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:54:19,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333466821] [2022-03-15 16:54:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:54:19,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:54:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:54:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:19,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:54:19,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333466821] [2022-03-15 16:54:19,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333466821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:54:19,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725351771] [2022-03-15 16:54:19,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:54:19,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:54:19,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:54:19,305 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:54:19,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 16:54:19,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:54:19,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:54:19,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:54:19,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:54:19,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:54:19,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:54:19,863 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 109 treesize of output 75 [2022-03-15 16:54:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:19,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:54:20,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:54:20,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:54:20,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-03-15 16:54:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:21,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725351771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:54:21,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:54:21,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 16:54:21,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286210008] [2022-03-15 16:54:21,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:54:21,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:54:21,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:54:21,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:54:21,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:54:21,474 INFO L87 Difference]: Start difference. First operand 3665 states and 13175 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:54:23,897 INFO L93 Difference]: Finished difference Result 5436 states and 18393 transitions. [2022-03-15 16:54:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:54:23,898 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:54:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:54:23,908 INFO L225 Difference]: With dead ends: 5436 [2022-03-15 16:54:23,908 INFO L226 Difference]: Without dead ends: 5370 [2022-03-15 16:54:23,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=535, Invalid=2435, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:54:23,909 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 302 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:54:23,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 283 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:54:23,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5370 states. [2022-03-15 16:54:23,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5370 to 3706. [2022-03-15 16:54:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 3705 states have (on average 3.5894736842105264) internal successors, (13299), 3705 states have internal predecessors, (13299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 13299 transitions. [2022-03-15 16:54:23,974 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 13299 transitions. Word has length 26 [2022-03-15 16:54:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:54:23,974 INFO L470 AbstractCegarLoop]: Abstraction has 3706 states and 13299 transitions. [2022-03-15 16:54:23,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 13299 transitions. [2022-03-15 16:54:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:54:23,980 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:54:23,980 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] [2022-03-15 16:54:23,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-15 16:54:24,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:54:24,181 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:54:24,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:54:24,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2113781654, now seen corresponding path program 40 times [2022-03-15 16:54:24,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:54:24,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759613187] [2022-03-15 16:54:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:54:24,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:54:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:54:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:24,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:54:24,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759613187] [2022-03-15 16:54:24,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759613187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:54:24,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995222011] [2022-03-15 16:54:24,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:54:24,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:54:24,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:54:24,438 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:54:24,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 16:54:24,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:54:24,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:54:24,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:54:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:54:25,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:54:25,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:54:25,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-15 16:54:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:25,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:54:25,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:54:25,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:54:25,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 227 treesize of output 181 [2022-03-15 16:54:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:27,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995222011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:54:27,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:54:27,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 16:54:27,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824295234] [2022-03-15 16:54:27,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:54:27,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:54:27,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:54:27,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:54:27,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:54:27,155 INFO L87 Difference]: Start difference. First operand 3706 states and 13299 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-03-15 16:54:29,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:54:29,459 INFO L93 Difference]: Finished difference Result 5520 states and 18701 transitions. [2022-03-15 16:54:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:54:29,459 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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 26 [2022-03-15 16:54:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:54:29,469 INFO L225 Difference]: With dead ends: 5520 [2022-03-15 16:54:29,469 INFO L226 Difference]: Without dead ends: 5490 [2022-03-15 16:54:29,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=488, Invalid=2164, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:54:29,470 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 249 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 413 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:54:29,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 342 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 814 Invalid, 0 Unknown, 413 Unchecked, 0.5s Time] [2022-03-15 16:54:29,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5490 states. [2022-03-15 16:54:29,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5490 to 3677. [2022-03-15 16:54:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 3676 states have (on average 3.5943960826985855) internal successors, (13213), 3676 states have internal predecessors, (13213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 13213 transitions. [2022-03-15 16:54:29,535 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 13213 transitions. Word has length 26 [2022-03-15 16:54:29,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:54:29,535 INFO L470 AbstractCegarLoop]: Abstraction has 3677 states and 13213 transitions. [2022-03-15 16:54:29,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-03-15 16:54:29,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 13213 transitions. [2022-03-15 16:54:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:54:29,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:54:29,541 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] [2022-03-15 16:54:29,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-15 16:54:29,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:54:29,741 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:54:29,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:54:29,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1437564668, now seen corresponding path program 41 times [2022-03-15 16:54:29,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:54:29,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985577682] [2022-03-15 16:54:29,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:54:29,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:54:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:54:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:29,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:54:29,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985577682] [2022-03-15 16:54:29,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985577682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:54:29,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758615779] [2022-03-15 16:54:29,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:54:29,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:54:29,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:54:29,959 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:54:29,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 16:54:29,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:54:29,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:54:29,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:54:29,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:54:30,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:54:30,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:54:30,445 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 109 treesize of output 91 [2022-03-15 16:54:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:31,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:54:31,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:54:31,514 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 187 treesize of output 173 [2022-03-15 16:54:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:35,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758615779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:54:35,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:54:35,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:54:35,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755700144] [2022-03-15 16:54:35,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:54:35,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:54:35,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:54:35,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:54:35,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:54:35,408 INFO L87 Difference]: Start difference. First operand 3677 states and 13213 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:48,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:54:48,423 INFO L93 Difference]: Finished difference Result 6537 states and 21976 transitions. [2022-03-15 16:54:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-15 16:54:48,423 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:54:48,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:54:48,435 INFO L225 Difference]: With dead ends: 6537 [2022-03-15 16:54:48,435 INFO L226 Difference]: Without dead ends: 6494 [2022-03-15 16:54:48,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4626 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=2272, Invalid=10384, Unknown=0, NotChecked=0, Total=12656 [2022-03-15 16:54:48,436 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 443 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:54:48,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 358 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1149 Invalid, 0 Unknown, 223 Unchecked, 0.8s Time] [2022-03-15 16:54:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6494 states. [2022-03-15 16:54:48,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6494 to 3703. [2022-03-15 16:54:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3702 states have (on average 3.592382495948136) internal successors, (13299), 3702 states have internal predecessors, (13299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 13299 transitions. [2022-03-15 16:54:48,506 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 13299 transitions. Word has length 26 [2022-03-15 16:54:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:54:48,506 INFO L470 AbstractCegarLoop]: Abstraction has 3703 states and 13299 transitions. [2022-03-15 16:54:48,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 13299 transitions. [2022-03-15 16:54:48,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:54:48,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:54:48,512 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] [2022-03-15 16:54:48,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-15 16:54:48,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-15 16:54:48,712 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:54:48,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:54:48,713 INFO L85 PathProgramCache]: Analyzing trace with hash -99997454, now seen corresponding path program 42 times [2022-03-15 16:54:48,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:54:48,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816738476] [2022-03-15 16:54:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:54:48,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:54:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:54:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:48,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:54:48,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816738476] [2022-03-15 16:54:48,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816738476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:54:48,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722297415] [2022-03-15 16:54:48,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:54:48,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:54:48,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:54:48,989 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:54:48,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 16:54:49,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:54:49,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:54:49,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:54:49,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:54:49,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:54:49,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:54:49,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:54:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:49,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:54:50,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:54:50,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:54:50,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 165 [2022-03-15 16:54:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:51,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722297415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:54:51,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:54:51,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 16:54:51,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646244248] [2022-03-15 16:54:51,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:54:51,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:54:51,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:54:51,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:54:51,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:54:51,504 INFO L87 Difference]: Start difference. First operand 3703 states and 13299 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:54:54,214 INFO L93 Difference]: Finished difference Result 6007 states and 20389 transitions. [2022-03-15 16:54:54,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:54:54,214 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:54:54,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:54:54,225 INFO L225 Difference]: With dead ends: 6007 [2022-03-15 16:54:54,226 INFO L226 Difference]: Without dead ends: 5977 [2022-03-15 16:54:54,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:54:54,226 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 281 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:54:54,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 323 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 887 Invalid, 0 Unknown, 216 Unchecked, 0.5s Time] [2022-03-15 16:54:54,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5977 states. [2022-03-15 16:54:54,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5977 to 3692. [2022-03-15 16:54:54,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3692 states, 3691 states have (on average 3.593335139528583) internal successors, (13263), 3691 states have internal predecessors, (13263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3692 states to 3692 states and 13263 transitions. [2022-03-15 16:54:54,296 INFO L78 Accepts]: Start accepts. Automaton has 3692 states and 13263 transitions. Word has length 26 [2022-03-15 16:54:54,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:54:54,296 INFO L470 AbstractCegarLoop]: Abstraction has 3692 states and 13263 transitions. [2022-03-15 16:54:54,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:54,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3692 states and 13263 transitions. [2022-03-15 16:54:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:54:54,302 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:54:54,302 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] [2022-03-15 16:54:54,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-15 16:54:54,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:54:54,502 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:54:54,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:54:54,503 INFO L85 PathProgramCache]: Analyzing trace with hash -574976500, now seen corresponding path program 43 times [2022-03-15 16:54:54,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:54:54,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686167057] [2022-03-15 16:54:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:54:54,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:54:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:54:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:54,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:54:54,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686167057] [2022-03-15 16:54:54,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686167057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:54:54,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230763562] [2022-03-15 16:54:54,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:54:54,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:54:54,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:54:54,632 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:54:54,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 16:54:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:54:54,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:54:54,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:54:55,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:54:55,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:54:55,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-15 16:54:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:55,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:54:55,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:54:55,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:54:55,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-03-15 16:54:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:54:57,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230763562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:54:57,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:54:57,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 16:54:57,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647106378] [2022-03-15 16:54:57,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:54:57,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:54:57,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:54:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:54:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:54:57,672 INFO L87 Difference]: Start difference. First operand 3692 states and 13263 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-03-15 16:54:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:54:59,732 INFO L93 Difference]: Finished difference Result 5505 states and 18690 transitions. [2022-03-15 16:54:59,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:54:59,732 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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 26 [2022-03-15 16:54:59,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:54:59,743 INFO L225 Difference]: With dead ends: 5505 [2022-03-15 16:54:59,743 INFO L226 Difference]: Without dead ends: 5415 [2022-03-15 16:54:59,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:54:59,744 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 262 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:54:59,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 239 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:54:59,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5415 states. [2022-03-15 16:54:59,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5415 to 3713. [2022-03-15 16:54:59,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3713 states, 3712 states have (on average 3.5932112068965516) internal successors, (13338), 3712 states have internal predecessors, (13338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:54:59,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3713 states to 3713 states and 13338 transitions. [2022-03-15 16:54:59,811 INFO L78 Accepts]: Start accepts. Automaton has 3713 states and 13338 transitions. Word has length 26 [2022-03-15 16:54:59,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:54:59,812 INFO L470 AbstractCegarLoop]: Abstraction has 3713 states and 13338 transitions. [2022-03-15 16:54:59,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-03-15 16:54:59,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3713 states and 13338 transitions. [2022-03-15 16:54:59,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:54:59,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:54:59,817 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] [2022-03-15 16:54:59,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-15 16:55:00,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:00,018 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:55:00,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:55:00,018 INFO L85 PathProgramCache]: Analyzing trace with hash -742785592, now seen corresponding path program 44 times [2022-03-15 16:55:00,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:55:00,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340964133] [2022-03-15 16:55:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:55:00,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:55:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:55:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:00,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:55:00,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340964133] [2022-03-15 16:55:00,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340964133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:55:00,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497170322] [2022-03-15 16:55:00,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:55:00,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:00,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:55:00,155 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:55:00,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 16:55:00,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:55:00,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:55:00,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:55:00,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:55:00,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:55:00,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:00,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:55:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:00,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:55:01,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:55:01,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:01,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-03-15 16:55:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:03,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497170322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:55:03,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:55:03,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 16:55:03,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67226438] [2022-03-15 16:55:03,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:55:03,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:55:03,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:55:03,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:55:03,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:55:03,141 INFO L87 Difference]: Start difference. First operand 3713 states and 13338 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-03-15 16:55:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:55:06,221 INFO L93 Difference]: Finished difference Result 6011 states and 20362 transitions. [2022-03-15 16:55:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:55:06,221 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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 26 [2022-03-15 16:55:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:55:06,236 INFO L225 Difference]: With dead ends: 6011 [2022-03-15 16:55:06,236 INFO L226 Difference]: Without dead ends: 5951 [2022-03-15 16:55:06,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:55:06,237 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 275 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:55:06,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 279 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:55:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2022-03-15 16:55:06,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 3732. [2022-03-15 16:55:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3732 states, 3731 states have (on average 3.5917984454569822) internal successors, (13401), 3731 states have internal predecessors, (13401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 13401 transitions. [2022-03-15 16:55:06,311 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 13401 transitions. Word has length 26 [2022-03-15 16:55:06,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:55:06,311 INFO L470 AbstractCegarLoop]: Abstraction has 3732 states and 13401 transitions. [2022-03-15 16:55:06,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-03-15 16:55:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 13401 transitions. [2022-03-15 16:55:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:55:06,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:55:06,316 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] [2022-03-15 16:55:06,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-15 16:55:06,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:06,517 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:55:06,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:55:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash -444012144, now seen corresponding path program 45 times [2022-03-15 16:55:06,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:55:06,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886514752] [2022-03-15 16:55:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:55:06,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:55:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:55:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:06,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:55:06,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886514752] [2022-03-15 16:55:06,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886514752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:55:06,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908258078] [2022-03-15 16:55:06,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:55:06,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:06,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:55:06,647 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:55:06,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 16:55:06,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:55:06,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:55:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:55:06,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:55:07,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:55:07,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:07,087 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 109 treesize of output 91 [2022-03-15 16:55:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:07,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:55:08,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:08,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 165 [2022-03-15 16:55:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:10,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908258078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:55:10,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:55:10,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 16:55:10,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589660500] [2022-03-15 16:55:10,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:55:10,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:55:10,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:55:10,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:55:10,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:55:10,386 INFO L87 Difference]: Start difference. First operand 3732 states and 13401 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:55:13,185 INFO L93 Difference]: Finished difference Result 5720 states and 19437 transitions. [2022-03-15 16:55:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:55:13,185 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:55:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:55:13,196 INFO L225 Difference]: With dead ends: 5720 [2022-03-15 16:55:13,196 INFO L226 Difference]: Without dead ends: 5644 [2022-03-15 16:55:13,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=682, Invalid=2740, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 16:55:13,197 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 282 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:55:13,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 239 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 630 Invalid, 0 Unknown, 483 Unchecked, 0.3s Time] [2022-03-15 16:55:13,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5644 states. [2022-03-15 16:55:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5644 to 3777. [2022-03-15 16:55:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 3.590042372881356) internal successors, (13556), 3776 states have internal predecessors, (13556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:13,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 13556 transitions. [2022-03-15 16:55:13,283 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 13556 transitions. Word has length 26 [2022-03-15 16:55:13,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:55:13,283 INFO L470 AbstractCegarLoop]: Abstraction has 3777 states and 13556 transitions. [2022-03-15 16:55:13,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:13,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 13556 transitions. [2022-03-15 16:55:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:55:13,288 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:55:13,288 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] [2022-03-15 16:55:13,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-15 16:55:13,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-03-15 16:55:13,488 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:55:13,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:55:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1900543888, now seen corresponding path program 46 times [2022-03-15 16:55:13,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:55:13,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857598579] [2022-03-15 16:55:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:55:13,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:55:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:55:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:13,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:55:13,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857598579] [2022-03-15 16:55:13,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857598579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:55:13,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443687021] [2022-03-15 16:55:13,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:55:13,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:13,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:55:13,675 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:55:13,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 16:55:13,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:55:13,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:55:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:55:13,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:55:14,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:55:14,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:55:14,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-15 16:55:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:14,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:55:14,765 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:55:14,765 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 199 treesize of output 157 [2022-03-15 16:55:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:17,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443687021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:55:17,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:55:17,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-15 16:55:17,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938620485] [2022-03-15 16:55:17,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:55:17,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:55:17,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:55:17,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:55:17,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:55:17,302 INFO L87 Difference]: Start difference. First operand 3777 states and 13556 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:18,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:55:18,708 INFO L93 Difference]: Finished difference Result 5882 states and 20112 transitions. [2022-03-15 16:55:18,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:55:18,709 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:55:18,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:55:18,721 INFO L225 Difference]: With dead ends: 5882 [2022-03-15 16:55:18,721 INFO L226 Difference]: Without dead ends: 5837 [2022-03-15 16:55:18,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=368, Invalid=1984, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:55:18,721 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 160 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:55:18,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 366 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 986 Invalid, 0 Unknown, 299 Unchecked, 0.5s Time] [2022-03-15 16:55:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5837 states. [2022-03-15 16:55:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5837 to 3806. [2022-03-15 16:55:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3806 states, 3805 states have (on average 3.588961892247043) internal successors, (13656), 3805 states have internal predecessors, (13656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3806 states to 3806 states and 13656 transitions. [2022-03-15 16:55:18,795 INFO L78 Accepts]: Start accepts. Automaton has 3806 states and 13656 transitions. Word has length 26 [2022-03-15 16:55:18,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:55:18,795 INFO L470 AbstractCegarLoop]: Abstraction has 3806 states and 13656 transitions. [2022-03-15 16:55:18,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3806 states and 13656 transitions. [2022-03-15 16:55:18,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:55:18,801 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:55:18,801 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] [2022-03-15 16:55:18,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-15 16:55:19,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:19,002 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:55:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:55:19,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1595082124, now seen corresponding path program 47 times [2022-03-15 16:55:19,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:55:19,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556063462] [2022-03-15 16:55:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:55:19,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:55:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:55:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:19,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:55:19,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556063462] [2022-03-15 16:55:19,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556063462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:55:19,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551346946] [2022-03-15 16:55:19,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:55:19,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:19,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:55:19,243 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:55:19,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 16:55:19,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:55:19,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:55:19,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:55:19,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:55:19,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:55:19,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:55:19,796 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 109 treesize of output 75 [2022-03-15 16:55:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:19,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:55:20,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:55:20,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:20,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-03-15 16:55:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:22,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551346946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:55:22,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:55:22,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 16:55:22,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972304909] [2022-03-15 16:55:22,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:55:22,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:55:22,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:55:22,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:55:22,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:55:22,771 INFO L87 Difference]: Start difference. First operand 3806 states and 13656 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:55:24,402 INFO L93 Difference]: Finished difference Result 5254 states and 18061 transitions. [2022-03-15 16:55:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:55:24,402 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:55:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:55:24,411 INFO L225 Difference]: With dead ends: 5254 [2022-03-15 16:55:24,411 INFO L226 Difference]: Without dead ends: 5224 [2022-03-15 16:55:24,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=457, Invalid=2849, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:55:24,412 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 206 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:55:24,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 274 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 706 Invalid, 0 Unknown, 433 Unchecked, 0.4s Time] [2022-03-15 16:55:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5224 states. [2022-03-15 16:55:24,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5224 to 3827. [2022-03-15 16:55:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 3.5888656560376373) internal successors, (13731), 3826 states have internal predecessors, (13731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 13731 transitions. [2022-03-15 16:55:24,475 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 13731 transitions. Word has length 26 [2022-03-15 16:55:24,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:55:24,475 INFO L470 AbstractCegarLoop]: Abstraction has 3827 states and 13731 transitions. [2022-03-15 16:55:24,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:24,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 13731 transitions. [2022-03-15 16:55:24,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:55:24,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:55:24,481 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] [2022-03-15 16:55:24,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-15 16:55:24,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:24,681 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:55:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:55:24,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1082352392, now seen corresponding path program 48 times [2022-03-15 16:55:24,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:55:24,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735375482] [2022-03-15 16:55:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:55:24,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:55:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:55:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:24,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:55:24,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735375482] [2022-03-15 16:55:24,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735375482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:55:24,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822624082] [2022-03-15 16:55:24,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:55:24,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:24,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:55:24,928 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:55:24,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 16:55:24,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:55:24,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:55:24,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:55:24,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:55:25,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:55:25,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:25,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-15 16:55:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:26,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:55:26,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:26,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 173 [2022-03-15 16:55:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:29,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822624082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:55:29,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:55:29,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 16:55:29,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578371606] [2022-03-15 16:55:29,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:55:29,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:55:29,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:55:29,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:55:29,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:55:29,775 INFO L87 Difference]: Start difference. First operand 3827 states and 13731 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:31,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:55:31,762 INFO L93 Difference]: Finished difference Result 5627 states and 19435 transitions. [2022-03-15 16:55:31,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:55:31,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:55:31,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:55:31,790 INFO L225 Difference]: With dead ends: 5627 [2022-03-15 16:55:31,790 INFO L226 Difference]: Without dead ends: 5582 [2022-03-15 16:55:31,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=500, Invalid=1950, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:55:31,790 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 194 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:55:31,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 174 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 521 Invalid, 0 Unknown, 208 Unchecked, 0.3s Time] [2022-03-15 16:55:31,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5582 states. [2022-03-15 16:55:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5582 to 3845. [2022-03-15 16:55:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3845 states, 3844 states have (on average 3.5926118626430803) internal successors, (13810), 3844 states have internal predecessors, (13810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3845 states to 3845 states and 13810 transitions. [2022-03-15 16:55:31,852 INFO L78 Accepts]: Start accepts. Automaton has 3845 states and 13810 transitions. Word has length 26 [2022-03-15 16:55:31,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:55:31,852 INFO L470 AbstractCegarLoop]: Abstraction has 3845 states and 13810 transitions. [2022-03-15 16:55:31,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3845 states and 13810 transitions. [2022-03-15 16:55:31,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:55:31,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:55:31,858 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] [2022-03-15 16:55:31,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-15 16:55:32,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:32,058 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:55:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:55:32,059 INFO L85 PathProgramCache]: Analyzing trace with hash 399059498, now seen corresponding path program 49 times [2022-03-15 16:55:32,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:55:32,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600702156] [2022-03-15 16:55:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:55:32,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:55:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:55:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:32,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:55:32,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600702156] [2022-03-15 16:55:32,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600702156] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:55:32,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218340618] [2022-03-15 16:55:32,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:55:32,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:32,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:55:32,346 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:55:32,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 16:55:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:55:32,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:55:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:55:32,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:55:32,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:32,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:55:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:33,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:55:33,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:55:33,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:33,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 169 [2022-03-15 16:55:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:35,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218340618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:55:35,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:55:35,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 16:55:35,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679296328] [2022-03-15 16:55:35,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:55:35,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:55:35,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:55:35,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:55:35,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:55:35,084 INFO L87 Difference]: Start difference. First operand 3845 states and 13810 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:55:37,248 INFO L93 Difference]: Finished difference Result 6213 states and 21193 transitions. [2022-03-15 16:55:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:55:37,248 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:55:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:55:37,261 INFO L225 Difference]: With dead ends: 6213 [2022-03-15 16:55:37,261 INFO L226 Difference]: Without dead ends: 6183 [2022-03-15 16:55:37,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=549, Invalid=2313, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:55:37,261 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 292 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:55:37,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 267 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 719 Invalid, 0 Unknown, 177 Unchecked, 0.4s Time] [2022-03-15 16:55:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6183 states. [2022-03-15 16:55:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6183 to 3850. [2022-03-15 16:55:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3850 states, 3849 states have (on average 3.589763574954534) internal successors, (13817), 3849 states have internal predecessors, (13817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3850 states to 3850 states and 13817 transitions. [2022-03-15 16:55:37,339 INFO L78 Accepts]: Start accepts. Automaton has 3850 states and 13817 transitions. Word has length 26 [2022-03-15 16:55:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:55:37,339 INFO L470 AbstractCegarLoop]: Abstraction has 3850 states and 13817 transitions. [2022-03-15 16:55:37,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:37,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3850 states and 13817 transitions. [2022-03-15 16:55:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:55:37,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:55:37,345 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] [2022-03-15 16:55:37,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-15 16:55:37,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:37,546 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:55:37,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:55:37,546 INFO L85 PathProgramCache]: Analyzing trace with hash -607590512, now seen corresponding path program 50 times [2022-03-15 16:55:37,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:55:37,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593933487] [2022-03-15 16:55:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:55:37,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:55:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:55:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:37,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:55:37,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593933487] [2022-03-15 16:55:37,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593933487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:55:37,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837916816] [2022-03-15 16:55:37,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:55:37,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:37,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:55:37,755 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:55:37,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 16:55:37,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:55:37,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:55:37,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:55:37,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:55:38,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:55:38,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:38,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:55:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:38,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:55:38,737 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:55:38,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-03-15 16:55:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:40,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837916816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:55:40,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:55:40,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-15 16:55:40,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833286280] [2022-03-15 16:55:40,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:55:40,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:55:40,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:55:40,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:55:40,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:55:40,904 INFO L87 Difference]: Start difference. First operand 3850 states and 13817 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:55:44,190 INFO L93 Difference]: Finished difference Result 6286 states and 21454 transitions. [2022-03-15 16:55:44,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:55:44,190 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:55:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:55:44,202 INFO L225 Difference]: With dead ends: 6286 [2022-03-15 16:55:44,202 INFO L226 Difference]: Without dead ends: 6246 [2022-03-15 16:55:44,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=615, Invalid=3167, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:55:44,203 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 234 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:55:44,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 382 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:55:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2022-03-15 16:55:44,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 3863. [2022-03-15 16:55:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3862 states have (on average 3.5898498187467633) internal successors, (13864), 3862 states have internal predecessors, (13864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 13864 transitions. [2022-03-15 16:55:44,271 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 13864 transitions. Word has length 26 [2022-03-15 16:55:44,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:55:44,272 INFO L470 AbstractCegarLoop]: Abstraction has 3863 states and 13864 transitions. [2022-03-15 16:55:44,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:44,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 13864 transitions. [2022-03-15 16:55:44,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:55:44,277 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:55:44,277 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] [2022-03-15 16:55:44,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-15 16:55:44,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-15 16:55:44,478 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:55:44,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:55:44,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1075205646, now seen corresponding path program 51 times [2022-03-15 16:55:44,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:55:44,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898805605] [2022-03-15 16:55:44,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:55:44,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:55:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:55:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:44,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:55:44,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898805605] [2022-03-15 16:55:44,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898805605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:55:44,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318868763] [2022-03-15 16:55:44,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:55:44,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:44,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:55:44,759 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:55:44,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 16:55:44,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:55:44,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:55:44,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:55:44,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:55:45,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:55:45,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:45,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:55:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:45,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:55:45,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:55:45,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:45,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-03-15 16:55:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:47,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318868763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:55:47,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:55:47,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 16:55:47,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156174391] [2022-03-15 16:55:47,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:55:47,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:55:47,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:55:47,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:55:47,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:55:47,653 INFO L87 Difference]: Start difference. First operand 3863 states and 13864 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-03-15 16:55:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:55:50,012 INFO L93 Difference]: Finished difference Result 6091 states and 20727 transitions. [2022-03-15 16:55:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:55:50,012 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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 26 [2022-03-15 16:55:50,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:55:50,025 INFO L225 Difference]: With dead ends: 6091 [2022-03-15 16:55:50,025 INFO L226 Difference]: Without dead ends: 6061 [2022-03-15 16:55:50,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=560, Invalid=2410, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:55:50,025 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 233 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:55:50,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 405 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 965 Invalid, 0 Unknown, 409 Unchecked, 0.5s Time] [2022-03-15 16:55:50,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2022-03-15 16:55:50,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 3867. [2022-03-15 16:55:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 3.588722193481635) internal successors, (13874), 3866 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 13874 transitions. [2022-03-15 16:55:50,101 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 13874 transitions. Word has length 26 [2022-03-15 16:55:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:55:50,101 INFO L470 AbstractCegarLoop]: Abstraction has 3867 states and 13874 transitions. [2022-03-15 16:55:50,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-03-15 16:55:50,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 13874 transitions. [2022-03-15 16:55:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:55:50,107 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:55:50,107 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] [2022-03-15 16:55:50,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-15 16:55:50,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-15 16:55:50,308 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:55:50,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:55:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1876950220, now seen corresponding path program 52 times [2022-03-15 16:55:50,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:55:50,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008617468] [2022-03-15 16:55:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:55:50,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:55:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:55:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:50,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:55:50,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008617468] [2022-03-15 16:55:50,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008617468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:55:50,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576143009] [2022-03-15 16:55:50,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:55:50,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:50,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:55:50,531 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:55:50,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 16:55:50,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:55:50,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:55:50,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:55:50,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:55:50,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:55:50,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:50,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:55:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:51,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:55:51,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:55:51,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:51,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 211 treesize of output 169 [2022-03-15 16:55:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:54,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576143009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:55:54,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:55:54,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 16:55:54,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950620571] [2022-03-15 16:55:54,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:55:54,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:55:54,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:55:54,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:55:54,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:55:54,469 INFO L87 Difference]: Start difference. First operand 3867 states and 13874 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:56,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:55:56,685 INFO L93 Difference]: Finished difference Result 5840 states and 19897 transitions. [2022-03-15 16:55:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:55:56,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:55:56,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:55:56,697 INFO L225 Difference]: With dead ends: 5840 [2022-03-15 16:55:56,697 INFO L226 Difference]: Without dead ends: 5780 [2022-03-15 16:55:56,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=573, Invalid=2619, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:55:56,698 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 252 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:55:56,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 308 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 819 Invalid, 0 Unknown, 410 Unchecked, 0.5s Time] [2022-03-15 16:55:56,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5780 states. [2022-03-15 16:55:56,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5780 to 3945. [2022-03-15 16:55:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 3.591784989858012) internal successors, (14166), 3944 states have internal predecessors, (14166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 14166 transitions. [2022-03-15 16:55:56,773 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 14166 transitions. Word has length 26 [2022-03-15 16:55:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:55:56,773 INFO L470 AbstractCegarLoop]: Abstraction has 3945 states and 14166 transitions. [2022-03-15 16:55:56,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:55:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 14166 transitions. [2022-03-15 16:55:56,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:55:56,779 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:55:56,779 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] [2022-03-15 16:55:56,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-15 16:55:56,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:56,980 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:55:56,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:55:56,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1790993984, now seen corresponding path program 53 times [2022-03-15 16:55:56,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:55:56,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696235650] [2022-03-15 16:55:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:55:56,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:55:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:55:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:57,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:55:57,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696235650] [2022-03-15 16:55:57,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696235650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:55:57,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610827313] [2022-03-15 16:55:57,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:55:57,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:55:57,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:55:57,211 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:55:57,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 16:55:57,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:55:57,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:55:57,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:55:57,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:55:57,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:55:57,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:57,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:55:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:58,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:55:58,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:55:58,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:55:58,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:55:58,510 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 199 treesize of output 149 [2022-03-15 16:55:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:55:59,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610827313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:55:59,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:55:59,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:55:59,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784503407] [2022-03-15 16:55:59,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:55:59,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:55:59,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:55:59,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:55:59,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:55:59,231 INFO L87 Difference]: Start difference. First operand 3945 states and 14166 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:01,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:01,487 INFO L93 Difference]: Finished difference Result 9950 states and 34324 transitions. [2022-03-15 16:56:01,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:56:01,487 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:56:01,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:01,508 INFO L225 Difference]: With dead ends: 9950 [2022-03-15 16:56:01,508 INFO L226 Difference]: Without dead ends: 9920 [2022-03-15 16:56:01,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=611, Invalid=3049, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:56:01,508 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 352 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:01,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 377 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 508 Invalid, 0 Unknown, 393 Unchecked, 0.3s Time] [2022-03-15 16:56:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9920 states. [2022-03-15 16:56:01,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9920 to 3951. [2022-03-15 16:56:01,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3951 states, 3950 states have (on average 3.5916455696202534) internal successors, (14187), 3950 states have internal predecessors, (14187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3951 states to 3951 states and 14187 transitions. [2022-03-15 16:56:01,610 INFO L78 Accepts]: Start accepts. Automaton has 3951 states and 14187 transitions. Word has length 26 [2022-03-15 16:56:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:01,610 INFO L470 AbstractCegarLoop]: Abstraction has 3951 states and 14187 transitions. [2022-03-15 16:56:01,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3951 states and 14187 transitions. [2022-03-15 16:56:01,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:56:01,616 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:01,616 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] [2022-03-15 16:56:01,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-15 16:56:01,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:01,817 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:56:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:01,817 INFO L85 PathProgramCache]: Analyzing trace with hash 635089588, now seen corresponding path program 54 times [2022-03-15 16:56:01,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:01,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758668075] [2022-03-15 16:56:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:01,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:02,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:02,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758668075] [2022-03-15 16:56:02,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758668075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:02,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557162365] [2022-03-15 16:56:02,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:56:02,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:02,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:02,020 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:02,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 16:56:02,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:56:02,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:56:02,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:56:02,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:02,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:56:02,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:56:02,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-15 16:56:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:02,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:02,962 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:56:02,962 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 199 treesize of output 157 [2022-03-15 16:56:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:05,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557162365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:05,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:05,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-15 16:56:05,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930026355] [2022-03-15 16:56:05,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:05,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:56:05,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:05,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:56:05,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:56:05,106 INFO L87 Difference]: Start difference. First operand 3951 states and 14187 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:06,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:06,996 INFO L93 Difference]: Finished difference Result 6153 states and 21030 transitions. [2022-03-15 16:56:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:56:06,996 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:56:06,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:07,008 INFO L225 Difference]: With dead ends: 6153 [2022-03-15 16:56:07,008 INFO L226 Difference]: Without dead ends: 6108 [2022-03-15 16:56:07,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=385, Invalid=2165, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:56:07,009 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 193 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:07,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 368 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1416 Invalid, 0 Unknown, 145 Unchecked, 0.7s Time] [2022-03-15 16:56:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6108 states. [2022-03-15 16:56:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6108 to 3946. [2022-03-15 16:56:07,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 3.5921419518377693) internal successors, (14171), 3945 states have internal predecessors, (14171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:07,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 14171 transitions. [2022-03-15 16:56:07,090 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 14171 transitions. Word has length 26 [2022-03-15 16:56:07,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:07,091 INFO L470 AbstractCegarLoop]: Abstraction has 3946 states and 14171 transitions. [2022-03-15 16:56:07,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:07,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 14171 transitions. [2022-03-15 16:56:07,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:56:07,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:07,097 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] [2022-03-15 16:56:07,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-15 16:56:07,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-15 16:56:07,298 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:56:07,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:07,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1738126722, now seen corresponding path program 55 times [2022-03-15 16:56:07,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:07,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999692582] [2022-03-15 16:56:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:07,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:07,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:07,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999692582] [2022-03-15 16:56:07,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999692582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:07,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419144895] [2022-03-15 16:56:07,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:56:07,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:07,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:07,509 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:07,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 16:56:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:07,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:56:07,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:08,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:56:08,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:56:08,071 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 109 treesize of output 75 [2022-03-15 16:56:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:08,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:08,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:56:08,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:56:08,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 169 [2022-03-15 16:56:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:11,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419144895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:11,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:11,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 16:56:11,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638561966] [2022-03-15 16:56:11,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:11,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:56:11,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:11,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:56:11,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:56:11,234 INFO L87 Difference]: Start difference. First operand 3946 states and 14171 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-03-15 16:56:13,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:13,071 INFO L93 Difference]: Finished difference Result 6356 states and 21688 transitions. [2022-03-15 16:56:13,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:56:13,071 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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 26 [2022-03-15 16:56:13,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:13,087 INFO L225 Difference]: With dead ends: 6356 [2022-03-15 16:56:13,087 INFO L226 Difference]: Without dead ends: 6326 [2022-03-15 16:56:13,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=444, Invalid=2106, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:56:13,087 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 312 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:13,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 217 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 644 Invalid, 0 Unknown, 326 Unchecked, 0.4s Time] [2022-03-15 16:56:13,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6326 states. [2022-03-15 16:56:13,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6326 to 3933. [2022-03-15 16:56:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3933 states, 3932 states have (on average 3.592319430315361) internal successors, (14125), 3932 states have internal predecessors, (14125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3933 states to 3933 states and 14125 transitions. [2022-03-15 16:56:13,166 INFO L78 Accepts]: Start accepts. Automaton has 3933 states and 14125 transitions. Word has length 26 [2022-03-15 16:56:13,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:13,166 INFO L470 AbstractCegarLoop]: Abstraction has 3933 states and 14125 transitions. [2022-03-15 16:56:13,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-03-15 16:56:13,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3933 states and 14125 transitions. [2022-03-15 16:56:13,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:56:13,173 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:13,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:13,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-15 16:56:13,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:13,374 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:56:13,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:13,374 INFO L85 PathProgramCache]: Analyzing trace with hash 137082914, now seen corresponding path program 45 times [2022-03-15 16:56:13,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:13,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993703258] [2022-03-15 16:56:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:13,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:13,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:13,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993703258] [2022-03-15 16:56:13,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993703258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:13,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506569318] [2022-03-15 16:56:13,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:56:13,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:13,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:13,634 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:13,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 16:56:13,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:56:13,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:56:13,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:56:13,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:14,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:56:14,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:56:14,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:56:14,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:56:14,240 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 115 treesize of output 75 [2022-03-15 16:56:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:14,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:14,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:56:14,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:56:14,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:56:14,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:56:14,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 143 [2022-03-15 16:56:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:15,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506569318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:15,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:15,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-15 16:56:15,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224222487] [2022-03-15 16:56:15,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:15,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:56:15,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:15,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:56:15,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:56:15,076 INFO L87 Difference]: Start difference. First operand 3933 states and 14125 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:18,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:18,297 INFO L93 Difference]: Finished difference Result 7701 states and 25399 transitions. [2022-03-15 16:56:18,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:56:18,297 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:56:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:18,313 INFO L225 Difference]: With dead ends: 7701 [2022-03-15 16:56:18,314 INFO L226 Difference]: Without dead ends: 7620 [2022-03-15 16:56:18,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=966, Invalid=4584, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:56:18,314 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 436 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:18,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 488 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:56:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7620 states. [2022-03-15 16:56:18,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7620 to 4133. [2022-03-15 16:56:18,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 4132 states have (on average 3.599709583736689) internal successors, (14874), 4132 states have internal predecessors, (14874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 14874 transitions. [2022-03-15 16:56:18,420 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 14874 transitions. Word has length 26 [2022-03-15 16:56:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:18,420 INFO L470 AbstractCegarLoop]: Abstraction has 4133 states and 14874 transitions. [2022-03-15 16:56:18,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 14874 transitions. [2022-03-15 16:56:18,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:56:18,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:18,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:18,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-15 16:56:18,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 16:56:18,627 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:56:18,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:18,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1542258700, now seen corresponding path program 46 times [2022-03-15 16:56:18,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:18,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313398508] [2022-03-15 16:56:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:18,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:18,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:18,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313398508] [2022-03-15 16:56:18,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313398508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:18,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414464459] [2022-03-15 16:56:18,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:56:18,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:18,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:18,851 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:18,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 16:56:18,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:56:18,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:56:18,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:56:18,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:19,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:56:19,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:56:19,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:56:19,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:56:19,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-15 16:56:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:19,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:19,709 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:56:19,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-03-15 16:56:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:20,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414464459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:20,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:20,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-03-15 16:56:20,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275555678] [2022-03-15 16:56:20,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:20,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:56:20,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:20,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:56:20,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:56:20,229 INFO L87 Difference]: Start difference. First operand 4133 states and 14874 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:21,468 INFO L93 Difference]: Finished difference Result 5288 states and 18134 transitions. [2022-03-15 16:56:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:56:21,468 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:56:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:21,478 INFO L225 Difference]: With dead ends: 5288 [2022-03-15 16:56:21,478 INFO L226 Difference]: Without dead ends: 5258 [2022-03-15 16:56:21,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:56:21,479 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 223 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:21,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 342 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:56:21,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5258 states. [2022-03-15 16:56:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5258 to 4153. [2022-03-15 16:56:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4153 states, 4152 states have (on average 3.598265895953757) internal successors, (14940), 4152 states have internal predecessors, (14940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 14940 transitions. [2022-03-15 16:56:21,550 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 14940 transitions. Word has length 26 [2022-03-15 16:56:21,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:21,550 INFO L470 AbstractCegarLoop]: Abstraction has 4153 states and 14940 transitions. [2022-03-15 16:56:21,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:21,550 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 14940 transitions. [2022-03-15 16:56:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:56:21,556 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:21,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:21,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-15 16:56:21,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 16:56:21,757 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:56:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:21,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1684834032, now seen corresponding path program 47 times [2022-03-15 16:56:21,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:21,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51362821] [2022-03-15 16:56:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:21,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:21,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:21,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51362821] [2022-03-15 16:56:21,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51362821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:21,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91670727] [2022-03-15 16:56:21,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:56:21,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:21,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:21,950 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:21,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 16:56:21,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:56:21,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:56:21,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:56:21,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:22,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-15 16:56:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:22,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:22,661 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:56:22,661 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 215 treesize of output 149 [2022-03-15 16:56:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:23,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91670727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:23,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:23,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-03-15 16:56:23,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752264259] [2022-03-15 16:56:23,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:23,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:56:23,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:23,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:56:23,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:56:23,234 INFO L87 Difference]: Start difference. First operand 4153 states and 14940 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:25,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:25,034 INFO L93 Difference]: Finished difference Result 5588 states and 19569 transitions. [2022-03-15 16:56:25,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:56:25,034 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:56:25,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:25,046 INFO L225 Difference]: With dead ends: 5588 [2022-03-15 16:56:25,046 INFO L226 Difference]: Without dead ends: 5516 [2022-03-15 16:56:25,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:56:25,047 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 217 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:25,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 278 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:56:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2022-03-15 16:56:25,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 4167. [2022-03-15 16:56:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4167 states, 4166 states have (on average 3.594575132021123) internal successors, (14975), 4166 states have internal predecessors, (14975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4167 states to 4167 states and 14975 transitions. [2022-03-15 16:56:25,120 INFO L78 Accepts]: Start accepts. Automaton has 4167 states and 14975 transitions. Word has length 26 [2022-03-15 16:56:25,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:25,120 INFO L470 AbstractCegarLoop]: Abstraction has 4167 states and 14975 transitions. [2022-03-15 16:56:25,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:25,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4167 states and 14975 transitions. [2022-03-15 16:56:25,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:56:25,127 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:25,127 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:25,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-15 16:56:25,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-03-15 16:56:25,327 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:56:25,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:25,327 INFO L85 PathProgramCache]: Analyzing trace with hash 952866832, now seen corresponding path program 48 times [2022-03-15 16:56:25,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:25,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190200438] [2022-03-15 16:56:25,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:25,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:25,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:25,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190200438] [2022-03-15 16:56:25,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190200438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:25,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441566961] [2022-03-15 16:56:25,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:56:25,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:25,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:25,555 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:25,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 16:56:25,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:56:25,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:56:25,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:56:25,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:25,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-15 16:56:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:25,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:26,276 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:56:26,276 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 211 treesize of output 149 [2022-03-15 16:56:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:26,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441566961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:26,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:26,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-15 16:56:26,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995934143] [2022-03-15 16:56:26,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:26,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:56:26,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:26,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:56:26,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:56:26,842 INFO L87 Difference]: Start difference. First operand 4167 states and 14975 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:27,929 INFO L93 Difference]: Finished difference Result 5603 states and 19631 transitions. [2022-03-15 16:56:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:56:27,929 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:56:27,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:27,940 INFO L225 Difference]: With dead ends: 5603 [2022-03-15 16:56:27,940 INFO L226 Difference]: Without dead ends: 5573 [2022-03-15 16:56:27,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=367, Invalid=1985, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:56:27,940 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 189 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:27,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 224 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:56:27,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5573 states. [2022-03-15 16:56:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5573 to 4185. [2022-03-15 16:56:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 4184 states have (on average 3.5946462715105163) internal successors, (15040), 4184 states have internal predecessors, (15040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 15040 transitions. [2022-03-15 16:56:28,013 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 15040 transitions. Word has length 26 [2022-03-15 16:56:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:28,014 INFO L470 AbstractCegarLoop]: Abstraction has 4185 states and 15040 transitions. [2022-03-15 16:56:28,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 15040 transitions. [2022-03-15 16:56:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:56:28,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:28,021 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] [2022-03-15 16:56:28,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-15 16:56:28,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:28,221 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:56:28,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:28,221 INFO L85 PathProgramCache]: Analyzing trace with hash -700408688, now seen corresponding path program 56 times [2022-03-15 16:56:28,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:28,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497694950] [2022-03-15 16:56:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:28,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:28,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:28,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497694950] [2022-03-15 16:56:28,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497694950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:28,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575079575] [2022-03-15 16:56:28,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:56:28,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:28,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:28,445 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:28,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 16:56:28,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:56:28,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:56:28,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:56:28,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:28,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:56:28,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:56:28,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:56:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:29,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:29,600 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:56:29,601 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 187 treesize of output 157 [2022-03-15 16:56:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:32,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575079575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:32,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:32,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-15 16:56:32,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717410775] [2022-03-15 16:56:32,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:32,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:56:32,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:32,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:56:32,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:56:32,154 INFO L87 Difference]: Start difference. First operand 4185 states and 15040 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:38,337 INFO L93 Difference]: Finished difference Result 7828 states and 26050 transitions. [2022-03-15 16:56:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 16:56:38,338 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:56:38,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:38,352 INFO L225 Difference]: With dead ends: 7828 [2022-03-15 16:56:38,352 INFO L226 Difference]: Without dead ends: 7783 [2022-03-15 16:56:38,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1197, Invalid=6635, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 16:56:38,353 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 487 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 2240 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:38,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 509 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2240 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:56:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7783 states. [2022-03-15 16:56:38,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7783 to 4259. [2022-03-15 16:56:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 4258 states have (on average 3.592062000939408) internal successors, (15295), 4258 states have internal predecessors, (15295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 15295 transitions. [2022-03-15 16:56:38,434 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 15295 transitions. Word has length 26 [2022-03-15 16:56:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:38,434 INFO L470 AbstractCegarLoop]: Abstraction has 4259 states and 15295 transitions. [2022-03-15 16:56:38,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 15295 transitions. [2022-03-15 16:56:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:56:38,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:38,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:38,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-15 16:56:38,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:38,641 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:56:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:38,641 INFO L85 PathProgramCache]: Analyzing trace with hash 849972876, now seen corresponding path program 49 times [2022-03-15 16:56:38,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:38,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638749936] [2022-03-15 16:56:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:38,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:38,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:38,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638749936] [2022-03-15 16:56:38,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638749936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:38,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227209067] [2022-03-15 16:56:38,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:56:38,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:38,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:38,772 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:38,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 16:56:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:38,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:56:38,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:39,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:56:39,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:56:39,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:56:39,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:56:39,374 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 115 treesize of output 75 [2022-03-15 16:56:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:39,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:39,805 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:56:39,805 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 215 treesize of output 153 [2022-03-15 16:56:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:40,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227209067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:40,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:40,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-15 16:56:40,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265640898] [2022-03-15 16:56:40,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:40,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:56:40,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:40,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:56:40,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:56:40,213 INFO L87 Difference]: Start difference. First operand 4259 states and 15295 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:45,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:45,776 INFO L93 Difference]: Finished difference Result 7056 states and 23544 transitions. [2022-03-15 16:56:45,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-15 16:56:45,776 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:56:45,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:45,808 INFO L225 Difference]: With dead ends: 7056 [2022-03-15 16:56:45,809 INFO L226 Difference]: Without dead ends: 7026 [2022-03-15 16:56:45,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3867 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1746, Invalid=8966, Unknown=0, NotChecked=0, Total=10712 [2022-03-15 16:56:45,809 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 370 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:45,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 483 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 16:56:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7026 states. [2022-03-15 16:56:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7026 to 4317. [2022-03-15 16:56:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4317 states, 4316 states have (on average 3.5991658943466174) internal successors, (15534), 4316 states have internal predecessors, (15534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4317 states to 4317 states and 15534 transitions. [2022-03-15 16:56:45,888 INFO L78 Accepts]: Start accepts. Automaton has 4317 states and 15534 transitions. Word has length 26 [2022-03-15 16:56:45,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:45,888 INFO L470 AbstractCegarLoop]: Abstraction has 4317 states and 15534 transitions. [2022-03-15 16:56:45,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:45,888 INFO L276 IsEmpty]: Start isEmpty. Operand 4317 states and 15534 transitions. [2022-03-15 16:56:45,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:56:45,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:45,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:45,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-15 16:56:46,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-15 16:56:46,095 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:56:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:46,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1075966400, now seen corresponding path program 50 times [2022-03-15 16:56:46,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:46,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652705694] [2022-03-15 16:56:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:46,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:46,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:46,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652705694] [2022-03-15 16:56:46,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652705694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:46,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077409200] [2022-03-15 16:56:46,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:56:46,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:46,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:46,224 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:46,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 16:56:46,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:56:46,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:56:46,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:56:46,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:46,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:56:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:56:46,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:56:46,704 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 115 treesize of output 101 [2022-03-15 16:56:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:47,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:47,572 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:56:47,572 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 211 treesize of output 149 [2022-03-15 16:56:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:48,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077409200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:48,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:48,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-03-15 16:56:48,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259118711] [2022-03-15 16:56:48,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:48,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:56:48,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:48,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:56:48,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:56:48,049 INFO L87 Difference]: Start difference. First operand 4317 states and 15534 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:59,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:59,854 INFO L93 Difference]: Finished difference Result 9543 states and 31420 transitions. [2022-03-15 16:56:59,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-15 16:56:59,854 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:56:59,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:59,873 INFO L225 Difference]: With dead ends: 9543 [2022-03-15 16:56:59,874 INFO L226 Difference]: Without dead ends: 9465 [2022-03-15 16:56:59,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9247 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=3771, Invalid=19791, Unknown=0, NotChecked=0, Total=23562 [2022-03-15 16:56:59,875 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 477 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 3096 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 3243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 3096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:59,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 904 Invalid, 3243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 3096 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-15 16:56:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9465 states. [2022-03-15 16:56:59,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9465 to 4435. [2022-03-15 16:56:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4435 states, 4434 states have (on average 3.6039693279206135) internal successors, (15980), 4434 states have internal predecessors, (15980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4435 states to 4435 states and 15980 transitions. [2022-03-15 16:56:59,993 INFO L78 Accepts]: Start accepts. Automaton has 4435 states and 15980 transitions. Word has length 26 [2022-03-15 16:56:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:59,993 INFO L470 AbstractCegarLoop]: Abstraction has 4435 states and 15980 transitions. [2022-03-15 16:56:59,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4435 states and 15980 transitions. [2022-03-15 16:57:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:00,000 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:00,000 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] [2022-03-15 16:57:00,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-15 16:57:00,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:00,201 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:00,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:00,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1452642064, now seen corresponding path program 57 times [2022-03-15 16:57:00,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:00,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004983188] [2022-03-15 16:57:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:00,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:00,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:00,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004983188] [2022-03-15 16:57:00,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004983188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:00,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503162163] [2022-03-15 16:57:00,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:57:00,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:00,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:00,583 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:00,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 16:57:00,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:57:00,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:00,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:57:00,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:01,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:57:01,022 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 109 treesize of output 99 [2022-03-15 16:57:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:02,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:03,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:57:03,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 161 [2022-03-15 16:57:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:09,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503162163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:09,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:09,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-03-15 16:57:09,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067667520] [2022-03-15 16:57:09,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:09,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:57:09,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:09,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:57:09,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:57:09,169 INFO L87 Difference]: Start difference. First operand 4435 states and 15980 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:14,019 INFO L93 Difference]: Finished difference Result 9262 states and 32058 transitions. [2022-03-15 16:57:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 16:57:14,019 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:57:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:14,038 INFO L225 Difference]: With dead ends: 9262 [2022-03-15 16:57:14,039 INFO L226 Difference]: Without dead ends: 9220 [2022-03-15 16:57:14,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1758 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=815, Invalid=4587, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:57:14,039 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 335 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1257 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:14,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 429 Invalid, 2149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 840 Invalid, 0 Unknown, 1257 Unchecked, 0.5s Time] [2022-03-15 16:57:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9220 states. [2022-03-15 16:57:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9220 to 4451. [2022-03-15 16:57:14,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4451 states, 4450 states have (on average 3.6069662921348313) internal successors, (16051), 4450 states have internal predecessors, (16051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4451 states to 4451 states and 16051 transitions. [2022-03-15 16:57:14,159 INFO L78 Accepts]: Start accepts. Automaton has 4451 states and 16051 transitions. Word has length 26 [2022-03-15 16:57:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:14,159 INFO L470 AbstractCegarLoop]: Abstraction has 4451 states and 16051 transitions. [2022-03-15 16:57:14,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:14,159 INFO L276 IsEmpty]: Start isEmpty. Operand 4451 states and 16051 transitions. [2022-03-15 16:57:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:14,166 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:14,167 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] [2022-03-15 16:57:14,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:14,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:14,367 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:14,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash -794777230, now seen corresponding path program 58 times [2022-03-15 16:57:14,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:14,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110160795] [2022-03-15 16:57:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:14,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:14,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:14,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110160795] [2022-03-15 16:57:14,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110160795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:14,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45426594] [2022-03-15 16:57:14,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:57:14,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:14,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:14,626 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:14,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 16:57:14,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:57:14,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:14,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:57:14,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:14,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:57:14,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:57:14,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 82 [2022-03-15 16:57:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:15,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:15,741 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:57:15,741 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 263 treesize of output 193 [2022-03-15 16:57:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:19,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45426594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:19,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:19,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 16:57:19,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565258508] [2022-03-15 16:57:19,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:19,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:57:19,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:19,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:57:19,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:57:19,432 INFO L87 Difference]: Start difference. First operand 4451 states and 16051 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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) [2022-03-15 16:57:22,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:22,618 INFO L93 Difference]: Finished difference Result 6946 states and 23446 transitions. [2022-03-15 16:57:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:57:22,618 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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 26 [2022-03-15 16:57:22,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:22,633 INFO L225 Difference]: With dead ends: 6946 [2022-03-15 16:57:22,633 INFO L226 Difference]: Without dead ends: 6896 [2022-03-15 16:57:22,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=297, Invalid=1595, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:57:22,634 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 264 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:22,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 466 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:57:22,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6896 states. [2022-03-15 16:57:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6896 to 4482. [2022-03-15 16:57:22,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4482 states, 4481 states have (on average 3.6012050881499666) internal successors, (16137), 4481 states have internal predecessors, (16137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 16137 transitions. [2022-03-15 16:57:22,717 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 16137 transitions. Word has length 26 [2022-03-15 16:57:22,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:22,717 INFO L470 AbstractCegarLoop]: Abstraction has 4482 states and 16137 transitions. [2022-03-15 16:57:22,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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) [2022-03-15 16:57:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 16137 transitions. [2022-03-15 16:57:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:22,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:22,724 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] [2022-03-15 16:57:22,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-15 16:57:22,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:22,924 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:22,925 INFO L85 PathProgramCache]: Analyzing trace with hash 688357708, now seen corresponding path program 59 times [2022-03-15 16:57:22,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:22,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863822274] [2022-03-15 16:57:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:22,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:23,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:23,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863822274] [2022-03-15 16:57:23,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863822274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:23,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947706823] [2022-03-15 16:57:23,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:57:23,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:23,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:23,186 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:23,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 16:57:23,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:57:23,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:23,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:57:23,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:23,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:57:23,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:57:23,747 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 109 treesize of output 91 [2022-03-15 16:57:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:24,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:24,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:57:24,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:57:24,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:57:24,959 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 175 treesize of output 145 [2022-03-15 16:57:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:25,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947706823] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:25,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:25,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-03-15 16:57:25,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052528838] [2022-03-15 16:57:25,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:25,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:57:25,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:25,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:57:25,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:57:25,814 INFO L87 Difference]: Start difference. First operand 4482 states and 16137 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:30,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:30,968 INFO L93 Difference]: Finished difference Result 6582 states and 22523 transitions. [2022-03-15 16:57:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-15 16:57:30,968 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:57:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:31,003 INFO L225 Difference]: With dead ends: 6582 [2022-03-15 16:57:31,003 INFO L226 Difference]: Without dead ends: 6552 [2022-03-15 16:57:31,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1094, Invalid=6916, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 16:57:31,004 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 291 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 907 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:31,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 527 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1176 Invalid, 0 Unknown, 907 Unchecked, 0.7s Time] [2022-03-15 16:57:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2022-03-15 16:57:31,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 4503. [2022-03-15 16:57:31,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4502 states have (on average 3.6063971568191913) internal successors, (16236), 4502 states have internal predecessors, (16236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 16236 transitions. [2022-03-15 16:57:31,091 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 16236 transitions. Word has length 26 [2022-03-15 16:57:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:31,091 INFO L470 AbstractCegarLoop]: Abstraction has 4503 states and 16236 transitions. [2022-03-15 16:57:31,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:31,091 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 16236 transitions. [2022-03-15 16:57:31,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:31,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:31,099 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] [2022-03-15 16:57:31,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:31,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-15 16:57:31,299 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:31,300 INFO L85 PathProgramCache]: Analyzing trace with hash -332212152, now seen corresponding path program 60 times [2022-03-15 16:57:31,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:31,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532859378] [2022-03-15 16:57:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:31,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:31,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:31,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532859378] [2022-03-15 16:57:31,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532859378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:31,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22128844] [2022-03-15 16:57:31,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:57:31,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:31,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:31,553 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:31,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 16:57:31,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:57:31,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:31,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:57:31,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:32,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:57:32,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:57:32,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-15 16:57:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:32,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:33,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:57:33,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:57:33,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 157 [2022-03-15 16:57:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:35,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22128844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:35,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:35,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-03-15 16:57:35,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896422140] [2022-03-15 16:57:35,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:35,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:57:35,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:35,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:57:35,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:57:35,550 INFO L87 Difference]: Start difference. First operand 4503 states and 16236 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:40,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:40,586 INFO L93 Difference]: Finished difference Result 8587 states and 28835 transitions. [2022-03-15 16:57:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:57:40,586 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:57:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:40,607 INFO L225 Difference]: With dead ends: 8587 [2022-03-15 16:57:40,607 INFO L226 Difference]: Without dead ends: 8536 [2022-03-15 16:57:40,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=896, Invalid=4654, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:57:40,608 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 353 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:40,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 559 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1753 Invalid, 0 Unknown, 402 Unchecked, 1.1s Time] [2022-03-15 16:57:40,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8536 states. [2022-03-15 16:57:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8536 to 4588. [2022-03-15 16:57:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 4587 states have (on average 3.6119468061914106) internal successors, (16568), 4587 states have internal predecessors, (16568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 16568 transitions. [2022-03-15 16:57:40,736 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 16568 transitions. Word has length 26 [2022-03-15 16:57:40,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:40,736 INFO L470 AbstractCegarLoop]: Abstraction has 4588 states and 16568 transitions. [2022-03-15 16:57:40,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 16568 transitions. [2022-03-15 16:57:40,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:40,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:40,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:40,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-15 16:57:40,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 16:57:40,945 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:40,946 INFO L85 PathProgramCache]: Analyzing trace with hash 45696930, now seen corresponding path program 51 times [2022-03-15 16:57:40,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:40,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286383909] [2022-03-15 16:57:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:40,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:41,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:41,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286383909] [2022-03-15 16:57:41,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286383909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:41,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751414076] [2022-03-15 16:57:41,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:57:41,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:41,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:41,122 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:41,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 16:57:41,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:57:41,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:41,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:57:41,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:41,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:57:41,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:57:41,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:57:41,562 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 115 treesize of output 103 [2022-03-15 16:57:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:42,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:42,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:57:42,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:57:42,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:57:42,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:57:42,652 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 211 treesize of output 143 [2022-03-15 16:57:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:42,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751414076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:42,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:42,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-03-15 16:57:42,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39758923] [2022-03-15 16:57:42,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:42,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:57:42,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:42,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:57:42,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:57:42,923 INFO L87 Difference]: Start difference. First operand 4588 states and 16568 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 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) [2022-03-15 16:57:46,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:46,465 INFO L93 Difference]: Finished difference Result 7936 states and 26987 transitions. [2022-03-15 16:57:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 16:57:46,466 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 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 26 [2022-03-15 16:57:46,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:46,483 INFO L225 Difference]: With dead ends: 7936 [2022-03-15 16:57:46,483 INFO L226 Difference]: Without dead ends: 7895 [2022-03-15 16:57:46,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=821, Invalid=3601, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:57:46,483 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 378 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:46,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 478 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:57:46,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7895 states. [2022-03-15 16:57:46,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7895 to 4709. [2022-03-15 16:57:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 4708 states have (on average 3.6159728122344945) internal successors, (17024), 4708 states have internal predecessors, (17024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 17024 transitions. [2022-03-15 16:57:46,594 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 17024 transitions. Word has length 26 [2022-03-15 16:57:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:46,594 INFO L470 AbstractCegarLoop]: Abstraction has 4709 states and 17024 transitions. [2022-03-15 16:57:46,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 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) [2022-03-15 16:57:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 17024 transitions. [2022-03-15 16:57:46,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:46,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:46,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:46,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-15 16:57:46,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-15 16:57:46,803 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:46,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:46,804 INFO L85 PathProgramCache]: Analyzing trace with hash 55443366, now seen corresponding path program 52 times [2022-03-15 16:57:46,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:46,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413835607] [2022-03-15 16:57:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:46,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:47,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:47,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413835607] [2022-03-15 16:57:47,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413835607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:47,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947474241] [2022-03-15 16:57:47,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:57:47,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:47,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:47,004 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:47,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 16:57:47,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:57:47,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:47,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:57:47,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:47,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:57:47,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:57:47,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:57:47,568 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 115 treesize of output 75 [2022-03-15 16:57:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:47,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:48,067 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:57:48,067 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 215 treesize of output 153 [2022-03-15 16:57:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:48,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947474241] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:48,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:48,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-15 16:57:48,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879873383] [2022-03-15 16:57:48,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:48,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:57:48,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:48,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:57:48,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:57:48,611 INFO L87 Difference]: Start difference. First operand 4709 states and 17024 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:54,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:54,908 INFO L93 Difference]: Finished difference Result 7528 states and 25837 transitions. [2022-03-15 16:57:54,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 16:57:54,908 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:57:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:54,923 INFO L225 Difference]: With dead ends: 7528 [2022-03-15 16:57:54,923 INFO L226 Difference]: Without dead ends: 7470 [2022-03-15 16:57:54,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3358 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1576, Invalid=7930, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 16:57:54,924 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 308 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 2157 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:54,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 620 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2157 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:57:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7470 states. [2022-03-15 16:57:55,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7470 to 4771. [2022-03-15 16:57:55,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4771 states, 4770 states have (on average 3.6052410901467504) internal successors, (17197), 4770 states have internal predecessors, (17197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4771 states to 4771 states and 17197 transitions. [2022-03-15 16:57:55,025 INFO L78 Accepts]: Start accepts. Automaton has 4771 states and 17197 transitions. Word has length 26 [2022-03-15 16:57:55,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:55,025 INFO L470 AbstractCegarLoop]: Abstraction has 4771 states and 17197 transitions. [2022-03-15 16:57:55,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4771 states and 17197 transitions. [2022-03-15 16:57:55,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:55,033 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:55,033 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:55,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-15 16:57:55,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-15 16:57:55,233 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:55,233 INFO L85 PathProgramCache]: Analyzing trace with hash 980937232, now seen corresponding path program 53 times [2022-03-15 16:57:55,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:55,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185840283] [2022-03-15 16:57:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:55,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:55,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:55,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185840283] [2022-03-15 16:57:55,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185840283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:55,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910600388] [2022-03-15 16:57:55,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:57:55,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:55,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:55,398 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:55,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 16:57:55,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:57:55,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:55,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:57:55,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:55,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:57:55,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:57:55,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:57:55,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:57:55,837 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 119 treesize of output 75 [2022-03-15 16:57:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:55,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:56,337 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:57:56,338 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 215 treesize of output 149 [2022-03-15 16:57:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:56,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910600388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:56,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:56,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-15 16:57:56,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285135121] [2022-03-15 16:57:56,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:56,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:57:56,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:56,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:57:56,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:57:56,755 INFO L87 Difference]: Start difference. First operand 4771 states and 17197 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:03,608 INFO L93 Difference]: Finished difference Result 7940 states and 26907 transitions. [2022-03-15 16:58:03,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-15 16:58:03,608 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:58:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:03,626 INFO L225 Difference]: With dead ends: 7940 [2022-03-15 16:58:03,626 INFO L226 Difference]: Without dead ends: 7815 [2022-03-15 16:58:03,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4254 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1960, Invalid=9596, Unknown=0, NotChecked=0, Total=11556 [2022-03-15 16:58:03,627 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 437 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:03,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 470 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1672 Invalid, 0 Unknown, 264 Unchecked, 0.9s Time] [2022-03-15 16:58:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7815 states. [2022-03-15 16:58:03,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7815 to 4803. [2022-03-15 16:58:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.5993336109954184) internal successors, (17284), 4802 states have internal predecessors, (17284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 17284 transitions. [2022-03-15 16:58:03,738 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 17284 transitions. Word has length 26 [2022-03-15 16:58:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:03,738 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 17284 transitions. [2022-03-15 16:58:03,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 17284 transitions. [2022-03-15 16:58:03,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:58:03,745 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:03,745 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] [2022-03-15 16:58:03,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:03,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:03,946 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:03,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1173944532, now seen corresponding path program 61 times [2022-03-15 16:58:03,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:03,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337304321] [2022-03-15 16:58:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:03,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:04,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:04,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337304321] [2022-03-15 16:58:04,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337304321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:04,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132631700] [2022-03-15 16:58:04,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:58:04,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:04,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:04,152 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:04,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 16:58:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:04,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:58:04,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:04,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:58:04,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:04,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-15 16:58:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:05,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:06,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:06,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 161 Received shutdown request... [2022-03-15 16:58:13,950 WARN L244 SmtUtils]: Removed 1 from assertion stack [2022-03-15 16:58:13,953 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-15 16:58:13,964 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:58:13,965 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:58:13,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-15 16:58:14,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:14,164 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. [2022-03-15 16:58:14,165 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-15 16:58:14,165 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-15 16:58:14,165 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-15 16:58:14,168 INFO L732 BasicCegarLoop]: Path program histogram: [61, 53, 1, 1, 1] [2022-03-15 16:58:14,169 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:58:14,169 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:58:14,170 INFO L202 PluginConnector]: Adding new model max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:58:14 BasicIcfg [2022-03-15 16:58:14,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:58:14,171 INFO L158 Benchmark]: Toolchain (without parser) took 744879.88ms. Allocated memory was 186.6MB in the beginning and 602.9MB in the end (delta: 416.3MB). Free memory was 146.1MB in the beginning and 212.1MB in the end (delta: -66.0MB). Peak memory consumption was 470.3MB. Max. memory is 8.0GB. [2022-03-15 16:58:14,171 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 186.6MB. Free memory is still 147.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:58:14,171 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.50ms. Allocated memory is still 186.6MB. Free memory was 146.1MB in the beginning and 144.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 16:58:14,171 INFO L158 Benchmark]: Boogie Preprocessor took 11.01ms. Allocated memory is still 186.6MB. Free memory was 144.5MB in the beginning and 143.5MB in the end (delta: 939.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:58:14,171 INFO L158 Benchmark]: RCFGBuilder took 198.71ms. Allocated memory is still 186.6MB. Free memory was 143.5MB in the beginning and 134.2MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 16:58:14,171 INFO L158 Benchmark]: TraceAbstraction took 744635.92ms. Allocated memory was 186.6MB in the beginning and 602.9MB in the end (delta: 416.3MB). Free memory was 133.8MB in the beginning and 212.1MB in the end (delta: -78.3MB). Peak memory consumption was 457.7MB. Max. memory is 8.0GB. [2022-03-15 16:58:14,171 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 186.6MB. Free memory is still 147.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.50ms. Allocated memory is still 186.6MB. Free memory was 146.1MB in the beginning and 144.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.01ms. Allocated memory is still 186.6MB. Free memory was 144.5MB in the beginning and 143.5MB in the end (delta: 939.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 198.71ms. Allocated memory is still 186.6MB. Free memory was 143.5MB in the beginning and 134.2MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 744635.92ms. Allocated memory was 186.6MB in the beginning and 602.9MB in the end (delta: 416.3MB). Free memory was 133.8MB in the beginning and 212.1MB in the end (delta: -78.3MB). Peak memory consumption was 457.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 744.5s, OverallIterations: 117, TraceHistogramMax: 2, PathProgramHistogramMax: 61, EmptinessCheckTime: 0.5s, AutomataDifference: 448.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 42141 SdHoareTripleChecker+Valid, 75.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42141 mSDsluCounter, 39639 SdHoareTripleChecker+Invalid, 64.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 17520 IncrementalHoareTripleChecker+Unchecked, 68804 mSDsCounter, 8449 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 135283 IncrementalHoareTripleChecker+Invalid, 161252 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8449 mSolverCounterUnsat, 3506 mSDtfsCounter, 135283 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12333 GetRequests, 4222 SyntacticMatches, 277 SemanticMatches, 7834 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243244 ImplicationChecksByTransitivity, 403.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4803occurred in iteration=116, InterpolantAutomatonStates: 6396, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.7s AutomataMinimizationTime, 116 MinimizatonAttempts, 263977 StatesRemovedByMinimization, 116 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 251.9s InterpolantComputationTime, 5766 NumberOfCodeBlocks, 5760 NumberOfCodeBlocksAsserted, 365 NumberOfCheckSat, 8278 ConstructedInterpolants, 165 QuantifiedInterpolants, 194146 SizeOfPredicates, 1285 NumberOfNonLiveVariables, 7229 ConjunctsInSsa, 2244 ConjunctsInUnsatCore, 342 InterpolantComputations, 3 PerfectInterpolantSequences, 174/1976 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown