/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:11:26,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:11:26,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:11:26,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 18:11:26,181 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-Delay.epf [2021-08-21 18:11:26,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:11:26,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:11:26,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:11:26,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:11:26,220 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:11:26,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:11:26,220 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:11:26,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:11:26,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:11:26,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:11:26,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:11:26,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:11:26,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:11:26,222 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:11:26,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:11:26,222 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:11:26,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:11:26,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:11:26,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:11:26,223 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:11:26,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:11:26,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:11:26,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:11:26,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:11:26,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:11:26,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:11:26,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:11:26,225 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:11:26,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:11:26,225 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:11:26,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:11:26,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:11:26,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:11:26,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:11:26,575 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:11:26,576 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:11:26,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl [2021-08-21 18:11:26,578 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl' [2021-08-21 18:11:26,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:11:26,608 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:11:26,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:11:26,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:11:26,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:11:26,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:11:26" (1/1) ... [2021-08-21 18:11:26,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:11:26" (1/1) ... [2021-08-21 18:11:26,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:11:26,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:11:26,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:11:26,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:11:26,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:11:26" (1/1) ... [2021-08-21 18:11:26,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:11:26" (1/1) ... [2021-08-21 18:11:26,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:11:26" (1/1) ... [2021-08-21 18:11:26,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:11:26" (1/1) ... [2021-08-21 18:11:26,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:11:26" (1/1) ... [2021-08-21 18:11:26,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:11:26" (1/1) ... [2021-08-21 18:11:26,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:11:26" (1/1) ... [2021-08-21 18:11:26,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:11:26,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:11:26,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:11:26,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:11:26,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:11:26" (1/1) ... [2021-08-21 18:11:26,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:11:26,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:26,682 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) [2021-08-21 18:11:26,694 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 [2021-08-21 18:11:26,715 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:11:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:11:26,715 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:11:26,716 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:11:26,716 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:11:26,716 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:11:26,716 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:11:26,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:11:26,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:11:26,717 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:11:26,924 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:11:26,924 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-21 18:11:26,925 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 18:11:26,926 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:11:26 BoogieIcfgContainer [2021-08-21 18:11:26,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:11:26,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:11:26,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:11:26,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:11:26,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:11:26" (1/2) ... [2021-08-21 18:11:26,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b62712a and model type send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:11:26, skipping insertion in model container [2021-08-21 18:11:26,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:11:26" (2/2) ... [2021-08-21 18:11:26,932 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive-alt.wvr.bpl [2021-08-21 18:11:26,936 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:11:26,936 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:11:26,936 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:11:26,936 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:11:26,962 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 18:11:27,012 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:11:27,018 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-21 18:11:27,018 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 18:11:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:27,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 18:11:27,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:27,123 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:27,123 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:27,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:27,128 INFO L82 PathProgramCache]: Analyzing trace with hash -612514274, now seen corresponding path program 1 times [2021-08-21 18:11:27,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:27,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071299858] [2021-08-21 18:11:27,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:27,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:27,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:27,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071299858] [2021-08-21 18:11:27,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071299858] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:11:27,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:11:27,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:11:27,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624313531] [2021-08-21 18:11:27,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:11:27,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:27,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:11:27,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:11:27,319 INFO L87 Difference]: Start difference. First operand has 24 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:27,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:27,347 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2021-08-21 18:11:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:11:27,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 18:11:27,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:27,360 INFO L225 Difference]: With dead ends: 42 [2021-08-21 18:11:27,360 INFO L226 Difference]: Without dead ends: 23 [2021-08-21 18:11:27,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:11:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-21 18:11:27,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-08-21 18:11:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2021-08-21 18:11:27,393 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 11 [2021-08-21 18:11:27,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:27,394 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2021-08-21 18:11:27,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:27,394 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2021-08-21 18:11:27,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 18:11:27,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:27,395 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:27,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:11:27,396 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:27,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:27,396 INFO L82 PathProgramCache]: Analyzing trace with hash -987070873, now seen corresponding path program 1 times [2021-08-21 18:11:27,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:27,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185305457] [2021-08-21 18:11:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:27,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:27,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:27,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185305457] [2021-08-21 18:11:27,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185305457] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:11:27,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:11:27,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:11:27,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275192427] [2021-08-21 18:11:27,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:11:27,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:27,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:11:27,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:11:27,432 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:27,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:27,444 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2021-08-21 18:11:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:11:27,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 18:11:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:27,446 INFO L225 Difference]: With dead ends: 25 [2021-08-21 18:11:27,446 INFO L226 Difference]: Without dead ends: 25 [2021-08-21 18:11:27,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:11:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-21 18:11:27,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-08-21 18:11:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2021-08-21 18:11:27,451 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 12 [2021-08-21 18:11:27,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:27,451 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2021-08-21 18:11:27,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2021-08-21 18:11:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 18:11:27,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:27,456 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:27,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:11:27,457 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:27,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1304321976, now seen corresponding path program 1 times [2021-08-21 18:11:27,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:27,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826118948] [2021-08-21 18:11:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:27,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:27,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:27,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826118948] [2021-08-21 18:11:27,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826118948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:27,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765771297] [2021-08-21 18:11:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:27,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:27,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:27,556 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) [2021-08-21 18:11:27,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:11:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:27,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:11:27,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:27,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-08-21 18:11:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:27,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765771297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:27,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:27,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:11:27,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703217814] [2021-08-21 18:11:27,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:11:27,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:27,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:11:27,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:11:27,831 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:27,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:27,879 INFO L93 Difference]: Finished difference Result 40 states and 59 transitions. [2021-08-21 18:11:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:11:27,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 18:11:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:27,881 INFO L225 Difference]: With dead ends: 40 [2021-08-21 18:11:27,881 INFO L226 Difference]: Without dead ends: 33 [2021-08-21 18:11:27,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:11:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-21 18:11:27,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2021-08-21 18:11:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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) [2021-08-21 18:11:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 40 transitions. [2021-08-21 18:11:27,885 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 40 transitions. Word has length 15 [2021-08-21 18:11:27,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:27,886 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 40 transitions. [2021-08-21 18:11:27,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:27,886 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 40 transitions. [2021-08-21 18:11:27,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 18:11:27,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:27,886 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:27,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 18:11:28,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:28,103 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:28,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:28,104 INFO L82 PathProgramCache]: Analyzing trace with hash -699645992, now seen corresponding path program 1 times [2021-08-21 18:11:28,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:28,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270951165] [2021-08-21 18:11:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:28,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:11:28,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:28,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270951165] [2021-08-21 18:11:28,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270951165] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:11:28,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:11:28,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:11:28,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557883179] [2021-08-21 18:11:28,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:11:28,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:11:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:11:28,126 INFO L87 Difference]: Start difference. First operand 27 states and 40 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:28,131 INFO L93 Difference]: Finished difference Result 31 states and 47 transitions. [2021-08-21 18:11:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:11:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 18:11:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:28,132 INFO L225 Difference]: With dead ends: 31 [2021-08-21 18:11:28,132 INFO L226 Difference]: Without dead ends: 31 [2021-08-21 18:11:28,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:11:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-21 18:11:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-08-21 18:11:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2021-08-21 18:11:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2021-08-21 18:11:28,136 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 15 [2021-08-21 18:11:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:28,136 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2021-08-21 18:11:28,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2021-08-21 18:11:28,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 18:11:28,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:28,140 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:28,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 18:11:28,140 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:28,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1738430269, now seen corresponding path program 2 times [2021-08-21 18:11:28,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:28,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327068118] [2021-08-21 18:11:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:28,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:28,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:28,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327068118] [2021-08-21 18:11:28,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327068118] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:11:28,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:11:28,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:11:28,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229532935] [2021-08-21 18:11:28,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:11:28,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:28,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:11:28,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:11:28,182 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:28,196 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2021-08-21 18:11:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:11:28,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 18:11:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:28,198 INFO L225 Difference]: With dead ends: 66 [2021-08-21 18:11:28,198 INFO L226 Difference]: Without dead ends: 66 [2021-08-21 18:11:28,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:11:28,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-21 18:11:28,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2021-08-21 18:11:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 41 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) [2021-08-21 18:11:28,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 69 transitions. [2021-08-21 18:11:28,208 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 69 transitions. Word has length 16 [2021-08-21 18:11:28,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:28,208 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 69 transitions. [2021-08-21 18:11:28,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 69 transitions. [2021-08-21 18:11:28,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 18:11:28,209 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:28,209 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:28,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 18:11:28,209 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:28,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:28,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2026072000, now seen corresponding path program 3 times [2021-08-21 18:11:28,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:28,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272913166] [2021-08-21 18:11:28,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:28,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:11:28,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:28,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272913166] [2021-08-21 18:11:28,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272913166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:28,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386007315] [2021-08-21 18:11:28,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:11:28,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:28,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:28,261 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) [2021-08-21 18:11:28,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:11:28,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:11:28,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:28,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 18:11:28,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:11:28,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386007315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:28,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:28,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:11:28,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535122883] [2021-08-21 18:11:28,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:11:28,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:28,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:11:28,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:11:28,401 INFO L87 Difference]: Start difference. First operand 42 states and 69 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:28,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:28,412 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2021-08-21 18:11:28,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:11:28,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 18:11:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:28,415 INFO L225 Difference]: With dead ends: 58 [2021-08-21 18:11:28,415 INFO L226 Difference]: Without dead ends: 58 [2021-08-21 18:11:28,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:11:28,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-21 18:11:28,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-08-21 18:11:28,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.6538461538461537) internal successors, (86), 52 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 86 transitions. [2021-08-21 18:11:28,420 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 86 transitions. Word has length 19 [2021-08-21 18:11:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:28,421 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 86 transitions. [2021-08-21 18:11:28,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:28,421 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 86 transitions. [2021-08-21 18:11:28,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 18:11:28,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:28,422 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:28,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:28,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-21 18:11:28,637 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:28,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:28,638 INFO L82 PathProgramCache]: Analyzing trace with hash 22104032, now seen corresponding path program 1 times [2021-08-21 18:11:28,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:28,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083034683] [2021-08-21 18:11:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:28,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:28,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:28,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083034683] [2021-08-21 18:11:28,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083034683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:28,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717225695] [2021-08-21 18:11:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:28,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:28,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:28,833 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) [2021-08-21 18:11:28,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:11:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:28,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 18:11:28,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:29,211 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:11:29,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2021-08-21 18:11:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:29,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717225695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:29,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:29,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 18:11:29,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677036203] [2021-08-21 18:11:29,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:11:29,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:29,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:11:29,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:11:29,282 INFO L87 Difference]: Start difference. First operand 53 states and 86 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:29,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:29,344 INFO L93 Difference]: Finished difference Result 80 states and 132 transitions. [2021-08-21 18:11:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:11:29,345 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 18:11:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:29,349 INFO L225 Difference]: With dead ends: 80 [2021-08-21 18:11:29,350 INFO L226 Difference]: Without dead ends: 71 [2021-08-21 18:11:29,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:11:29,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-21 18:11:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2021-08-21 18:11:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.631578947368421) internal successors, (93), 57 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 93 transitions. [2021-08-21 18:11:29,359 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 93 transitions. Word has length 19 [2021-08-21 18:11:29,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:29,363 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 93 transitions. [2021-08-21 18:11:29,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 93 transitions. [2021-08-21 18:11:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 18:11:29,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:29,366 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:29,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:29,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:29,566 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:29,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:29,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1946797840, now seen corresponding path program 2 times [2021-08-21 18:11:29,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:29,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506145428] [2021-08-21 18:11:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:29,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:29,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:29,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506145428] [2021-08-21 18:11:29,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506145428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:29,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990561610] [2021-08-21 18:11:29,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:11:29,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:29,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:29,713 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) [2021-08-21 18:11:29,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:11:29,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:11:29,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:29,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 18:11:29,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:30,009 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:11:30,009 INFO L388 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 37 treesize of output 19 [2021-08-21 18:11:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:30,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990561610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:30,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:30,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 18:11:30,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124304834] [2021-08-21 18:11:30,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:11:30,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:30,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:11:30,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:11:30,054 INFO L87 Difference]: Start difference. First operand 58 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:30,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:30,110 INFO L93 Difference]: Finished difference Result 86 states and 138 transitions. [2021-08-21 18:11:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:11:30,111 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 18:11:30,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:30,112 INFO L225 Difference]: With dead ends: 86 [2021-08-21 18:11:30,112 INFO L226 Difference]: Without dead ends: 77 [2021-08-21 18:11:30,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:11:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-21 18:11:30,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2021-08-21 18:11:30,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.6349206349206349) internal successors, (103), 63 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 103 transitions. [2021-08-21 18:11:30,130 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 103 transitions. Word has length 19 [2021-08-21 18:11:30,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:30,130 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 103 transitions. [2021-08-21 18:11:30,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:30,130 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 103 transitions. [2021-08-21 18:11:30,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:11:30,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:30,131 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:30,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:30,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:30,359 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:30,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:30,360 INFO L82 PathProgramCache]: Analyzing trace with hash 180345573, now seen corresponding path program 3 times [2021-08-21 18:11:30,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:30,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269443028] [2021-08-21 18:11:30,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:30,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:30,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:30,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269443028] [2021-08-21 18:11:30,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269443028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:30,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705447324] [2021-08-21 18:11:30,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:11:30,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:30,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:30,424 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) [2021-08-21 18:11:30,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:11:30,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:11:30,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:30,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:11:30,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:30,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705447324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:30,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:30,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:11:30,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113657711] [2021-08-21 18:11:30,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:11:30,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:30,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:11:30,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:11:30,630 INFO L87 Difference]: Start difference. First operand 64 states and 103 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:30,651 INFO L93 Difference]: Finished difference Result 134 states and 206 transitions. [2021-08-21 18:11:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:11:30,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:11:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:30,653 INFO L225 Difference]: With dead ends: 134 [2021-08-21 18:11:30,653 INFO L226 Difference]: Without dead ends: 134 [2021-08-21 18:11:30,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:11:30,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-21 18:11:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 79. [2021-08-21 18:11:30,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.6923076923076923) internal successors, (132), 78 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 132 transitions. [2021-08-21 18:11:30,658 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 132 transitions. Word has length 20 [2021-08-21 18:11:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:30,658 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 132 transitions. [2021-08-21 18:11:30,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 132 transitions. [2021-08-21 18:11:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:11:30,659 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:30,659 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:30,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:30,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:30,874 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:30,874 INFO L82 PathProgramCache]: Analyzing trace with hash -623510552, now seen corresponding path program 4 times [2021-08-21 18:11:30,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:30,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713377359] [2021-08-21 18:11:30,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:30,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:31,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:31,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713377359] [2021-08-21 18:11:31,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713377359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:31,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564439297] [2021-08-21 18:11:31,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:11:31,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:31,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:31,111 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) [2021-08-21 18:11:31,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:11:31,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:11:31,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:31,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 18:11:31,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:31,640 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 18:11:31,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 36 [2021-08-21 18:11:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:31,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564439297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:31,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:31,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:11:31,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557746052] [2021-08-21 18:11:31,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:11:31,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:31,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:11:31,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:11:31,685 INFO L87 Difference]: Start difference. First operand 79 states and 132 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:31,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:31,814 INFO L93 Difference]: Finished difference Result 169 states and 274 transitions. [2021-08-21 18:11:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:11:31,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:11:31,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:31,817 INFO L225 Difference]: With dead ends: 169 [2021-08-21 18:11:31,817 INFO L226 Difference]: Without dead ends: 127 [2021-08-21 18:11:31,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:11:31,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-21 18:11:31,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2021-08-21 18:11:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.6734693877551021) internal successors, (164), 98 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 164 transitions. [2021-08-21 18:11:31,834 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 164 transitions. Word has length 23 [2021-08-21 18:11:31,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:31,834 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 164 transitions. [2021-08-21 18:11:31,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 164 transitions. [2021-08-21 18:11:31,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:11:31,835 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:31,835 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:31,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:32,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:32,049 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:32,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1290680152, now seen corresponding path program 5 times [2021-08-21 18:11:32,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:32,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863724314] [2021-08-21 18:11:32,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:32,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:32,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:32,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863724314] [2021-08-21 18:11:32,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863724314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:32,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144432610] [2021-08-21 18:11:32,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:11:32,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:32,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:32,252 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) [2021-08-21 18:11:32,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:11:32,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:11:32,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:32,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 18:11:32,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:32,872 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 18:11:32,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 36 [2021-08-21 18:11:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:32,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144432610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:32,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:32,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:11:32,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422943275] [2021-08-21 18:11:32,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:11:32,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:32,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:11:32,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:11:32,928 INFO L87 Difference]: Start difference. First operand 99 states and 164 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:33,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:33,018 INFO L93 Difference]: Finished difference Result 183 states and 312 transitions. [2021-08-21 18:11:33,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:11:33,019 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:11:33,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:33,020 INFO L225 Difference]: With dead ends: 183 [2021-08-21 18:11:33,020 INFO L226 Difference]: Without dead ends: 165 [2021-08-21 18:11:33,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:11:33,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-21 18:11:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 102. [2021-08-21 18:11:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.6732673267326732) internal successors, (169), 101 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:33,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 169 transitions. [2021-08-21 18:11:33,025 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 169 transitions. Word has length 23 [2021-08-21 18:11:33,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:33,025 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 169 transitions. [2021-08-21 18:11:33,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:33,025 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 169 transitions. [2021-08-21 18:11:33,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:11:33,026 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:33,026 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:33,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:33,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:33,233 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:33,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:33,233 INFO L82 PathProgramCache]: Analyzing trace with hash 836461336, now seen corresponding path program 6 times [2021-08-21 18:11:33,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:33,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478666655] [2021-08-21 18:11:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:33,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:33,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:33,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478666655] [2021-08-21 18:11:33,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478666655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:33,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29564057] [2021-08-21 18:11:33,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:11:33,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:33,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:33,468 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) [2021-08-21 18:11:33,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:11:33,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:11:33,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:33,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 18:11:33,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:34,029 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 18:11:34,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 33 [2021-08-21 18:11:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:34,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29564057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:34,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:34,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 18:11:34,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829410473] [2021-08-21 18:11:34,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:11:34,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:34,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:11:34,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:11:34,071 INFO L87 Difference]: Start difference. First operand 102 states and 169 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:34,265 INFO L93 Difference]: Finished difference Result 276 states and 434 transitions. [2021-08-21 18:11:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:11:34,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:11:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:34,267 INFO L225 Difference]: With dead ends: 276 [2021-08-21 18:11:34,267 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 18:11:34,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:11:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 18:11:34,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 112. [2021-08-21 18:11:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.6666666666666667) internal successors, (185), 111 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 185 transitions. [2021-08-21 18:11:34,271 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 185 transitions. Word has length 23 [2021-08-21 18:11:34,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:34,272 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 185 transitions. [2021-08-21 18:11:34,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 185 transitions. [2021-08-21 18:11:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:11:34,272 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:34,273 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:34,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:34,495 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,SelfDestructingSolverStorable11 [2021-08-21 18:11:34,495 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:34,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:34,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1544315256, now seen corresponding path program 7 times [2021-08-21 18:11:34,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:34,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774962382] [2021-08-21 18:11:34,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:34,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:34,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:34,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774962382] [2021-08-21 18:11:34,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774962382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:34,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011728543] [2021-08-21 18:11:34,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:11:34,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:34,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:34,661 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) [2021-08-21 18:11:34,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:11:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:34,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 18:11:34,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:35,261 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 18:11:35,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 33 [2021-08-21 18:11:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:35,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011728543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:35,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:35,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 18:11:35,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246955938] [2021-08-21 18:11:35,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:11:35,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:35,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:11:35,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:11:35,308 INFO L87 Difference]: Start difference. First operand 112 states and 185 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:35,468 INFO L93 Difference]: Finished difference Result 227 states and 387 transitions. [2021-08-21 18:11:35,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:11:35,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:11:35,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:35,470 INFO L225 Difference]: With dead ends: 227 [2021-08-21 18:11:35,470 INFO L226 Difference]: Without dead ends: 200 [2021-08-21 18:11:35,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:11:35,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-08-21 18:11:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 92. [2021-08-21 18:11:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.6813186813186813) internal successors, (153), 91 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 153 transitions. [2021-08-21 18:11:35,474 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 153 transitions. Word has length 23 [2021-08-21 18:11:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:35,474 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 153 transitions. [2021-08-21 18:11:35,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 153 transitions. [2021-08-21 18:11:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:11:35,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:35,475 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:35,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:35,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 18:11:35,702 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:35,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:35,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1961021720, now seen corresponding path program 8 times [2021-08-21 18:11:35,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:35,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097430403] [2021-08-21 18:11:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:35,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:35,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:35,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097430403] [2021-08-21 18:11:35,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097430403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:35,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740617356] [2021-08-21 18:11:35,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:11:35,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:35,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:35,866 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) [2021-08-21 18:11:35,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:11:36,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:11:36,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:36,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 18:11:36,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:36,409 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:11:36,410 INFO L388 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 54 treesize of output 24 [2021-08-21 18:11:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:36,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740617356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:36,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:36,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-21 18:11:36,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980654549] [2021-08-21 18:11:36,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:11:36,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:36,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:11:36,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:11:36,454 INFO L87 Difference]: Start difference. First operand 92 states and 153 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:36,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:36,575 INFO L93 Difference]: Finished difference Result 140 states and 230 transitions. [2021-08-21 18:11:36,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:11:36,576 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:11:36,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:36,576 INFO L225 Difference]: With dead ends: 140 [2021-08-21 18:11:36,576 INFO L226 Difference]: Without dead ends: 131 [2021-08-21 18:11:36,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:11:36,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-21 18:11:36,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 98. [2021-08-21 18:11:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.6804123711340206) internal successors, (163), 97 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 163 transitions. [2021-08-21 18:11:36,581 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 163 transitions. Word has length 23 [2021-08-21 18:11:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:36,581 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 163 transitions. [2021-08-21 18:11:36,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 163 transitions. [2021-08-21 18:11:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:11:36,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:36,582 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:36,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:36,796 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,SelfDestructingSolverStorable13 [2021-08-21 18:11:36,797 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:36,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:36,797 INFO L82 PathProgramCache]: Analyzing trace with hash 621285853, now seen corresponding path program 9 times [2021-08-21 18:11:36,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:36,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393878364] [2021-08-21 18:11:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:36,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:36,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:36,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393878364] [2021-08-21 18:11:36,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393878364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:36,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043126869] [2021-08-21 18:11:36,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:11:36,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:36,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:36,844 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) [2021-08-21 18:11:36,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:11:37,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:11:37,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:37,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:11:37,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:37,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043126869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:37,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:37,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 18:11:37,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969659884] [2021-08-21 18:11:37,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:11:37,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:11:37,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:11:37,206 INFO L87 Difference]: Start difference. First operand 98 states and 163 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:37,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:37,231 INFO L93 Difference]: Finished difference Result 197 states and 312 transitions. [2021-08-21 18:11:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:11:37,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:11:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:37,233 INFO L225 Difference]: With dead ends: 197 [2021-08-21 18:11:37,233 INFO L226 Difference]: Without dead ends: 197 [2021-08-21 18:11:37,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:11:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-08-21 18:11:37,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 116. [2021-08-21 18:11:37,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.7130434782608697) internal successors, (197), 115 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 197 transitions. [2021-08-21 18:11:37,237 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 197 transitions. Word has length 24 [2021-08-21 18:11:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:37,237 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 197 transitions. [2021-08-21 18:11:37,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:37,237 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 197 transitions. [2021-08-21 18:11:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:11:37,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:37,237 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:37,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:37,452 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,SelfDestructingSolverStorable14 [2021-08-21 18:11:37,453 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:37,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:37,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1349759104, now seen corresponding path program 10 times [2021-08-21 18:11:37,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:37,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662523014] [2021-08-21 18:11:37,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:37,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:11:37,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:37,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662523014] [2021-08-21 18:11:37,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662523014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:37,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227827152] [2021-08-21 18:11:37,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:11:37,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:37,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:37,679 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) [2021-08-21 18:11:37,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:11:37,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:11:37,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:37,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:11:37,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:38,575 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:11:38,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 79 treesize of output 46 [2021-08-21 18:11:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:38,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227827152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:38,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:38,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-21 18:11:38,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133242349] [2021-08-21 18:11:38,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:11:38,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:38,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:11:38,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:11:38,613 INFO L87 Difference]: Start difference. First operand 116 states and 197 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-08-21 18:11:38,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:38,783 INFO L93 Difference]: Finished difference Result 307 states and 495 transitions. [2021-08-21 18:11:38,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:11:38,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 27 [2021-08-21 18:11:38,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:38,785 INFO L225 Difference]: With dead ends: 307 [2021-08-21 18:11:38,785 INFO L226 Difference]: Without dead ends: 226 [2021-08-21 18:11:38,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 324.4ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:11:38,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-21 18:11:38,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 153. [2021-08-21 18:11:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.6710526315789473) internal successors, (254), 152 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:38,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 254 transitions. [2021-08-21 18:11:38,790 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 254 transitions. Word has length 27 [2021-08-21 18:11:38,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:38,790 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 254 transitions. [2021-08-21 18:11:38,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-08-21 18:11:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 254 transitions. [2021-08-21 18:11:38,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:11:38,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:38,791 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:38,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:39,008 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,SelfDestructingSolverStorable15 [2021-08-21 18:11:39,008 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:39,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:39,009 INFO L82 PathProgramCache]: Analyzing trace with hash 574934704, now seen corresponding path program 11 times [2021-08-21 18:11:39,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:39,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200361684] [2021-08-21 18:11:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:39,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:39,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:39,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200361684] [2021-08-21 18:11:39,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200361684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:39,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947958733] [2021-08-21 18:11:39,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:11:39,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:39,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:39,213 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) [2021-08-21 18:11:39,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:11:39,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:11:39,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:39,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:11:39,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:40,145 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:11:40,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 79 treesize of output 46 [2021-08-21 18:11:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:40,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947958733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:40,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:40,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-21 18:11:40,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415165542] [2021-08-21 18:11:40,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:11:40,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:40,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:11:40,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:11:40,194 INFO L87 Difference]: Start difference. First operand 153 states and 254 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-08-21 18:11:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:40,341 INFO L93 Difference]: Finished difference Result 348 states and 598 transitions. [2021-08-21 18:11:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:11:40,342 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 27 [2021-08-21 18:11:40,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:40,344 INFO L225 Difference]: With dead ends: 348 [2021-08-21 18:11:40,344 INFO L226 Difference]: Without dead ends: 321 [2021-08-21 18:11:40,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:11:40,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-21 18:11:40,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 170. [2021-08-21 18:11:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.6627218934911243) internal successors, (281), 169 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:40,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 281 transitions. [2021-08-21 18:11:40,349 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 281 transitions. Word has length 27 [2021-08-21 18:11:40,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:40,349 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 281 transitions. [2021-08-21 18:11:40,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-08-21 18:11:40,349 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 281 transitions. [2021-08-21 18:11:40,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:11:40,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:40,350 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:40,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:40,550 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,SelfDestructingSolverStorable16 [2021-08-21 18:11:40,550 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:40,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:40,551 INFO L82 PathProgramCache]: Analyzing trace with hash 110900608, now seen corresponding path program 12 times [2021-08-21 18:11:40,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:40,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564624530] [2021-08-21 18:11:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:40,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:40,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:40,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564624530] [2021-08-21 18:11:40,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564624530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:40,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057111570] [2021-08-21 18:11:40,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:11:40,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:40,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:40,778 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) [2021-08-21 18:11:40,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:11:41,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:11:41,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:41,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:11:41,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:41,749 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:11:41,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 79 treesize of output 46 [2021-08-21 18:11:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:41,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057111570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:41,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:41,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 18:11:41,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608852883] [2021-08-21 18:11:41,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:11:41,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:11:41,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:11:41,791 INFO L87 Difference]: Start difference. First operand 170 states and 281 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:41,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:41,941 INFO L93 Difference]: Finished difference Result 436 states and 719 transitions. [2021-08-21 18:11:41,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:11:41,941 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 18:11:41,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:41,942 INFO L225 Difference]: With dead ends: 436 [2021-08-21 18:11:41,942 INFO L226 Difference]: Without dead ends: 352 [2021-08-21 18:11:41,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:11:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-08-21 18:11:41,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 174. [2021-08-21 18:11:41,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.670520231213873) internal successors, (289), 173 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 289 transitions. [2021-08-21 18:11:41,947 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 289 transitions. Word has length 27 [2021-08-21 18:11:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:41,948 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 289 transitions. [2021-08-21 18:11:41,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 289 transitions. [2021-08-21 18:11:41,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:11:41,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:41,948 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:41,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-21 18:11:42,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:42,153 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:42,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:42,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1440047440, now seen corresponding path program 13 times [2021-08-21 18:11:42,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:42,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472115672] [2021-08-21 18:11:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:42,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:42,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:42,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472115672] [2021-08-21 18:11:42,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472115672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:42,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225533848] [2021-08-21 18:11:42,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:11:42,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:42,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:42,346 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) [2021-08-21 18:11:42,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:11:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:42,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:11:42,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:43,268 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 18:11:43,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 43 [2021-08-21 18:11:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:43,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225533848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:43,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:43,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-08-21 18:11:43,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891939228] [2021-08-21 18:11:43,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:11:43,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:43,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:11:43,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:11:43,305 INFO L87 Difference]: Start difference. First operand 174 states and 289 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:43,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:43,554 INFO L93 Difference]: Finished difference Result 495 states and 795 transitions. [2021-08-21 18:11:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:11:43,555 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 18:11:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:43,557 INFO L225 Difference]: With dead ends: 495 [2021-08-21 18:11:43,557 INFO L226 Difference]: Without dead ends: 401 [2021-08-21 18:11:43,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 315.1ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:11:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-21 18:11:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 234. [2021-08-21 18:11:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.6523605150214593) internal successors, (385), 233 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:43,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 385 transitions. [2021-08-21 18:11:43,564 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 385 transitions. Word has length 27 [2021-08-21 18:11:43,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:43,564 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 385 transitions. [2021-08-21 18:11:43,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:43,564 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 385 transitions. [2021-08-21 18:11:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:11:43,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:43,565 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:43,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:43,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:43,788 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:43,789 INFO L82 PathProgramCache]: Analyzing trace with hash 20612272, now seen corresponding path program 14 times [2021-08-21 18:11:43,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:43,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512343814] [2021-08-21 18:11:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:43,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:43,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:43,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512343814] [2021-08-21 18:11:43,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512343814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:43,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138962896] [2021-08-21 18:11:43,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:11:43,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:43,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:43,999 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) [2021-08-21 18:11:43,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:11:44,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:11:44,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:44,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:11:44,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:44,980 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 18:11:44,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 43 [2021-08-21 18:11:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:45,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138962896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:45,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:45,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 18:11:45,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567386512] [2021-08-21 18:11:45,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:11:45,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:45,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:11:45,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:11:45,017 INFO L87 Difference]: Start difference. First operand 234 states and 385 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2021-08-21 18:11:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:45,177 INFO L93 Difference]: Finished difference Result 464 states and 775 transitions. [2021-08-21 18:11:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:11:45,178 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 27 [2021-08-21 18:11:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:45,180 INFO L225 Difference]: With dead ends: 464 [2021-08-21 18:11:45,180 INFO L226 Difference]: Without dead ends: 437 [2021-08-21 18:11:45,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:11:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-08-21 18:11:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 262. [2021-08-21 18:11:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.6513409961685823) internal successors, (431), 261 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 431 transitions. [2021-08-21 18:11:45,189 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 431 transitions. Word has length 27 [2021-08-21 18:11:45,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:45,189 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 431 transitions. [2021-08-21 18:11:45,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2021-08-21 18:11:45,189 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 431 transitions. [2021-08-21 18:11:45,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:11:45,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:45,190 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:45,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:45,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:45,412 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:45,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:45,413 INFO L82 PathProgramCache]: Analyzing trace with hash 874383680, now seen corresponding path program 15 times [2021-08-21 18:11:45,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:45,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433298562] [2021-08-21 18:11:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:45,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:45,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:45,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433298562] [2021-08-21 18:11:45,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433298562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:45,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427032254] [2021-08-21 18:11:45,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:11:45,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:45,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:45,657 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) [2021-08-21 18:11:45,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:11:46,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:11:46,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:46,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:11:46,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:46,983 INFO L354 Elim1Store]: treesize reduction 134, result has 5.0 percent of original size [2021-08-21 18:11:46,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 58 [2021-08-21 18:11:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:47,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427032254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:47,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:47,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-08-21 18:11:47,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149312786] [2021-08-21 18:11:47,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:11:47,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:47,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:11:47,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:11:47,026 INFO L87 Difference]: Start difference. First operand 262 states and 431 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:47,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:47,438 INFO L93 Difference]: Finished difference Result 511 states and 832 transitions. [2021-08-21 18:11:47,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:11:47,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 18:11:47,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:47,440 INFO L225 Difference]: With dead ends: 511 [2021-08-21 18:11:47,440 INFO L226 Difference]: Without dead ends: 444 [2021-08-21 18:11:47,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 398.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:11:47,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-21 18:11:47,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 287. [2021-08-21 18:11:47,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.6573426573426573) internal successors, (474), 286 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 474 transitions. [2021-08-21 18:11:47,448 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 474 transitions. Word has length 27 [2021-08-21 18:11:47,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:47,448 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 474 transitions. [2021-08-21 18:11:47,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:47,448 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 474 transitions. [2021-08-21 18:11:47,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:11:47,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:47,449 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:47,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:47,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:47,669 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:47,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:47,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1959923904, now seen corresponding path program 16 times [2021-08-21 18:11:47,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:47,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036457125] [2021-08-21 18:11:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:47,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:47,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:47,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036457125] [2021-08-21 18:11:47,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036457125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:47,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207232011] [2021-08-21 18:11:47,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:11:47,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:47,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:47,888 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) [2021-08-21 18:11:47,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:11:48,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:11:48,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:48,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:11:48,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:48,898 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 18:11:48,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 40 [2021-08-21 18:11:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:48,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207232011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:48,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:48,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 18:11:48,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26630708] [2021-08-21 18:11:48,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:11:48,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:48,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:11:48,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:11:48,935 INFO L87 Difference]: Start difference. First operand 287 states and 474 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:49,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:49,082 INFO L93 Difference]: Finished difference Result 529 states and 885 transitions. [2021-08-21 18:11:49,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:11:49,083 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 18:11:49,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:49,085 INFO L225 Difference]: With dead ends: 529 [2021-08-21 18:11:49,085 INFO L226 Difference]: Without dead ends: 502 [2021-08-21 18:11:49,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:11:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-08-21 18:11:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 287. [2021-08-21 18:11:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.6573426573426573) internal successors, (474), 286 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 474 transitions. [2021-08-21 18:11:49,100 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 474 transitions. Word has length 27 [2021-08-21 18:11:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:49,101 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 474 transitions. [2021-08-21 18:11:49,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 474 transitions. [2021-08-21 18:11:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:11:49,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:49,101 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:49,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:49,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:49,322 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:49,323 INFO L82 PathProgramCache]: Analyzing trace with hash 834888304, now seen corresponding path program 17 times [2021-08-21 18:11:49,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:49,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632136783] [2021-08-21 18:11:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:49,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:49,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:49,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632136783] [2021-08-21 18:11:49,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632136783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:49,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759083390] [2021-08-21 18:11:49,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:11:49,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:49,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:49,543 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) [2021-08-21 18:11:49,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:11:50,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:11:50,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:50,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:11:50,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:50,558 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:11:50,558 INFO L388 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 73 treesize of output 31 [2021-08-21 18:11:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:50,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759083390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:50,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:50,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 18:11:50,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267831367] [2021-08-21 18:11:50,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:11:50,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:11:50,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:11:50,599 INFO L87 Difference]: Start difference. First operand 287 states and 474 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:50,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:50,749 INFO L93 Difference]: Finished difference Result 378 states and 624 transitions. [2021-08-21 18:11:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:11:50,749 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 18:11:50,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:50,751 INFO L225 Difference]: With dead ends: 378 [2021-08-21 18:11:50,751 INFO L226 Difference]: Without dead ends: 369 [2021-08-21 18:11:50,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:11:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-08-21 18:11:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 293. [2021-08-21 18:11:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.6575342465753424) internal successors, (484), 292 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 484 transitions. [2021-08-21 18:11:50,757 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 484 transitions. Word has length 27 [2021-08-21 18:11:50,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:50,758 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 484 transitions. [2021-08-21 18:11:50,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:50,758 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 484 transitions. [2021-08-21 18:11:50,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:11:50,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:50,758 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:50,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:50,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:50,985 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:50,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:50,985 INFO L82 PathProgramCache]: Analyzing trace with hash 70888325, now seen corresponding path program 18 times [2021-08-21 18:11:50,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:50,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918078309] [2021-08-21 18:11:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:50,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:51,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:51,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918078309] [2021-08-21 18:11:51,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918078309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:51,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368162352] [2021-08-21 18:11:51,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:11:51,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:51,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:51,038 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) [2021-08-21 18:11:51,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:11:51,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:11:51,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:51,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:11:51,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:51,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368162352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:51,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:51,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 18:11:51,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269700383] [2021-08-21 18:11:51,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:11:51,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:51,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:11:51,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:11:51,765 INFO L87 Difference]: Start difference. First operand 293 states and 484 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:51,793 INFO L93 Difference]: Finished difference Result 443 states and 715 transitions. [2021-08-21 18:11:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:11:51,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:11:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:51,795 INFO L225 Difference]: With dead ends: 443 [2021-08-21 18:11:51,795 INFO L226 Difference]: Without dead ends: 443 [2021-08-21 18:11:51,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:11:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-21 18:11:51,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 323. [2021-08-21 18:11:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.670807453416149) internal successors, (538), 322 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 538 transitions. [2021-08-21 18:11:51,802 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 538 transitions. Word has length 28 [2021-08-21 18:11:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:51,802 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 538 transitions. [2021-08-21 18:11:51,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 538 transitions. [2021-08-21 18:11:51,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:11:51,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:51,803 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:51,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:52,016 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,SelfDestructingSolverStorable23 [2021-08-21 18:11:52,017 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:52,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2071149896, now seen corresponding path program 19 times [2021-08-21 18:11:52,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:52,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176329227] [2021-08-21 18:11:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:52,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:52,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:52,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176329227] [2021-08-21 18:11:52,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176329227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:52,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232310975] [2021-08-21 18:11:52,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:11:52,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:52,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:52,269 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) [2021-08-21 18:11:52,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:11:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:52,956 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:11:52,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:53,709 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:11:53,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 54 [2021-08-21 18:11:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:53,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232310975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:53,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:53,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-08-21 18:11:53,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041880751] [2021-08-21 18:11:53,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:11:53,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:53,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:11:53,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:11:53,757 INFO L87 Difference]: Start difference. First operand 323 states and 538 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:54,004 INFO L93 Difference]: Finished difference Result 590 states and 1003 transitions. [2021-08-21 18:11:54,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:11:54,004 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:11:54,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:54,006 INFO L225 Difference]: With dead ends: 590 [2021-08-21 18:11:54,006 INFO L226 Difference]: Without dead ends: 572 [2021-08-21 18:11:54,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 317.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:11:54,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-08-21 18:11:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 334. [2021-08-21 18:11:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.6666666666666667) internal successors, (555), 333 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 555 transitions. [2021-08-21 18:11:54,020 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 555 transitions. Word has length 31 [2021-08-21 18:11:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:54,020 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 555 transitions. [2021-08-21 18:11:54,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 555 transitions. [2021-08-21 18:11:54,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:11:54,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:54,021 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:54,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:54,245 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,SelfDestructingSolverStorable24 [2021-08-21 18:11:54,246 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:54,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:54,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1240884552, now seen corresponding path program 20 times [2021-08-21 18:11:54,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:54,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260927140] [2021-08-21 18:11:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:54,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:54,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:54,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260927140] [2021-08-21 18:11:54,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260927140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:54,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146070333] [2021-08-21 18:11:54,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:11:54,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:54,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:54,498 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) [2021-08-21 18:11:54,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:11:55,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:11:55,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:55,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:11:55,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:56,004 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:11:56,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 54 [2021-08-21 18:11:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:56,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146070333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:56,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:56,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-08-21 18:11:56,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186906982] [2021-08-21 18:11:56,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:11:56,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:56,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:11:56,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:11:56,042 INFO L87 Difference]: Start difference. First operand 334 states and 555 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:56,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:56,310 INFO L93 Difference]: Finished difference Result 509 states and 846 transitions. [2021-08-21 18:11:56,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:11:56,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:11:56,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:56,312 INFO L225 Difference]: With dead ends: 509 [2021-08-21 18:11:56,312 INFO L226 Difference]: Without dead ends: 495 [2021-08-21 18:11:56,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:11:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-08-21 18:11:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 308. [2021-08-21 18:11:56,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.6579804560260587) internal successors, (509), 307 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 509 transitions. [2021-08-21 18:11:56,319 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 509 transitions. Word has length 31 [2021-08-21 18:11:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:56,319 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 509 transitions. [2021-08-21 18:11:56,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 509 transitions. [2021-08-21 18:11:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:11:56,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:56,320 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:56,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:56,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 18:11:56,533 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:56,533 INFO L82 PathProgramCache]: Analyzing trace with hash -116324168, now seen corresponding path program 21 times [2021-08-21 18:11:56,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:56,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18214350] [2021-08-21 18:11:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:56,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:56,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:56,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18214350] [2021-08-21 18:11:56,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18214350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:56,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036192527] [2021-08-21 18:11:56,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:11:56,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:56,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:56,809 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) [2021-08-21 18:11:56,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:11:57,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:11:57,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:57,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:11:57,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:58,345 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:11:58,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 54 [2021-08-21 18:11:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:58,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036192527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:58,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:58,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-08-21 18:11:58,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833163817] [2021-08-21 18:11:58,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:11:58,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:58,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:11:58,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:11:58,381 INFO L87 Difference]: Start difference. First operand 308 states and 509 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:58,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:58,605 INFO L93 Difference]: Finished difference Result 648 states and 1106 transitions. [2021-08-21 18:11:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:11:58,606 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:11:58,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:58,608 INFO L225 Difference]: With dead ends: 648 [2021-08-21 18:11:58,608 INFO L226 Difference]: Without dead ends: 621 [2021-08-21 18:11:58,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 315.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:11:58,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-08-21 18:11:58,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 269. [2021-08-21 18:11:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.6791044776119404) internal successors, (450), 268 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 450 transitions. [2021-08-21 18:11:58,614 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 450 transitions. Word has length 31 [2021-08-21 18:11:58,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:58,615 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 450 transitions. [2021-08-21 18:11:58,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 450 transitions. [2021-08-21 18:11:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:11:58,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:58,615 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:58,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-21 18:11:58,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:58,833 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:58,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:58,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1312205576, now seen corresponding path program 22 times [2021-08-21 18:11:58,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:58,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216207705] [2021-08-21 18:11:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:58,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:11:59,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:59,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216207705] [2021-08-21 18:11:59,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216207705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:59,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369883078] [2021-08-21 18:11:59,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:11:59,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:59,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:59,123 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) [2021-08-21 18:11:59,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:11:59,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:11:59,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:59,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:11:59,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:00,765 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:12:00,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 54 [2021-08-21 18:12:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:00,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369883078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:00,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:00,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-08-21 18:12:00,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978477210] [2021-08-21 18:12:00,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:12:00,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:00,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:12:00,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:12:00,801 INFO L87 Difference]: Start difference. First operand 269 states and 450 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:01,198 INFO L93 Difference]: Finished difference Result 683 states and 1131 transitions. [2021-08-21 18:12:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:12:01,198 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:12:01,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:01,200 INFO L225 Difference]: With dead ends: 683 [2021-08-21 18:12:01,200 INFO L226 Difference]: Without dead ends: 560 [2021-08-21 18:12:01,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:12:01,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-08-21 18:12:01,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 293. [2021-08-21 18:12:01,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.6712328767123288) internal successors, (488), 292 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:01,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 488 transitions. [2021-08-21 18:12:01,206 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 488 transitions. Word has length 31 [2021-08-21 18:12:01,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:01,206 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 488 transitions. [2021-08-21 18:12:01,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 488 transitions. [2021-08-21 18:12:01,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:12:01,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:01,207 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:01,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:01,429 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,SelfDestructingSolverStorable27 [2021-08-21 18:12:01,429 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:01,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:01,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2101835896, now seen corresponding path program 23 times [2021-08-21 18:12:01,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:01,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038323241] [2021-08-21 18:12:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:01,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:01,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:01,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038323241] [2021-08-21 18:12:01,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038323241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:01,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348650832] [2021-08-21 18:12:01,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:12:01,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:01,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:01,696 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) [2021-08-21 18:12:01,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:12:02,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:12:02,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:02,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:12:02,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:03,318 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:12:03,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 54 [2021-08-21 18:12:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:03,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348650832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:03,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:03,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-08-21 18:12:03,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073941623] [2021-08-21 18:12:03,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:12:03,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:03,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:12:03,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:12:03,373 INFO L87 Difference]: Start difference. First operand 293 states and 488 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:03,547 INFO L93 Difference]: Finished difference Result 614 states and 1052 transitions. [2021-08-21 18:12:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:12:03,547 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:12:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:03,549 INFO L225 Difference]: With dead ends: 614 [2021-08-21 18:12:03,549 INFO L226 Difference]: Without dead ends: 587 [2021-08-21 18:12:03,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 341.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:12:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-21 18:12:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 261. [2021-08-21 18:12:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.6923076923076923) internal successors, (440), 260 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 440 transitions. [2021-08-21 18:12:03,556 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 440 transitions. Word has length 31 [2021-08-21 18:12:03,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:03,556 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 440 transitions. [2021-08-21 18:12:03,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 440 transitions. [2021-08-21 18:12:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:12:03,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:03,557 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:03,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-21 18:12:03,772 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,SelfDestructingSolverStorable28 [2021-08-21 18:12:03,773 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:03,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:03,773 INFO L82 PathProgramCache]: Analyzing trace with hash -810572040, now seen corresponding path program 24 times [2021-08-21 18:12:03,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:03,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261531139] [2021-08-21 18:12:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:03,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:04,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:04,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261531139] [2021-08-21 18:12:04,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261531139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:04,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098906289] [2021-08-21 18:12:04,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:12:04,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:04,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:04,043 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) [2021-08-21 18:12:04,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:12:05,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:12:05,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:05,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:12:05,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:05,783 INFO L354 Elim1Store]: treesize reduction 404, result has 3.1 percent of original size [2021-08-21 18:12:05,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 102 treesize of output 58 [2021-08-21 18:12:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:05,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098906289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:05,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:05,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-08-21 18:12:05,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736140718] [2021-08-21 18:12:05,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:12:05,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:05,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:12:05,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:12:05,820 INFO L87 Difference]: Start difference. First operand 261 states and 440 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:05,964 INFO L93 Difference]: Finished difference Result 420 states and 716 transitions. [2021-08-21 18:12:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:12:05,964 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:12:05,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:05,965 INFO L225 Difference]: With dead ends: 420 [2021-08-21 18:12:05,965 INFO L226 Difference]: Without dead ends: 411 [2021-08-21 18:12:05,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 341.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:12:05,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-08-21 18:12:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 280. [2021-08-21 18:12:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.6810035842293907) internal successors, (469), 279 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 469 transitions. [2021-08-21 18:12:05,970 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 469 transitions. Word has length 31 [2021-08-21 18:12:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:05,970 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 469 transitions. [2021-08-21 18:12:05,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 469 transitions. [2021-08-21 18:12:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:12:05,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:05,970 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:05,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:06,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:06,171 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:06,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1489838552, now seen corresponding path program 25 times [2021-08-21 18:12:06,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:06,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602366371] [2021-08-21 18:12:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:06,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:06,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:06,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602366371] [2021-08-21 18:12:06,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602366371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:06,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621830021] [2021-08-21 18:12:06,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:12:06,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:06,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:06,433 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) [2021-08-21 18:12:06,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:12:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:07,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:12:07,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:08,233 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:12:08,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 96 treesize of output 51 [2021-08-21 18:12:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:08,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621830021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:08,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:08,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-08-21 18:12:08,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165342328] [2021-08-21 18:12:08,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:12:08,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:08,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:12:08,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:12:08,272 INFO L87 Difference]: Start difference. First operand 280 states and 469 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-08-21 18:12:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:08,580 INFO L93 Difference]: Finished difference Result 641 states and 1103 transitions. [2021-08-21 18:12:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:12:08,580 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 31 [2021-08-21 18:12:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:08,582 INFO L225 Difference]: With dead ends: 641 [2021-08-21 18:12:08,582 INFO L226 Difference]: Without dead ends: 614 [2021-08-21 18:12:08,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:12:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-08-21 18:12:08,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 228. [2021-08-21 18:12:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.7048458149779735) internal successors, (387), 227 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 387 transitions. [2021-08-21 18:12:08,588 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 387 transitions. Word has length 31 [2021-08-21 18:12:08,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:08,588 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 387 transitions. [2021-08-21 18:12:08,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-08-21 18:12:08,588 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 387 transitions. [2021-08-21 18:12:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:12:08,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:08,589 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:08,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 18:12:08,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:08,805 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:08,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:08,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1822625096, now seen corresponding path program 26 times [2021-08-21 18:12:08,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:08,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302320436] [2021-08-21 18:12:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:08,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:09,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:09,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302320436] [2021-08-21 18:12:09,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302320436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:09,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248974492] [2021-08-21 18:12:09,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:12:09,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:09,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:09,110 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) [2021-08-21 18:12:09,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 18:12:10,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:12:10,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:10,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:12:10,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:10,946 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 18:12:10,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 48 [2021-08-21 18:12:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:10,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248974492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:10,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:10,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-08-21 18:12:10,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854650306] [2021-08-21 18:12:10,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:12:10,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:10,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:12:10,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:12:10,992 INFO L87 Difference]: Start difference. First operand 228 states and 387 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:11,390 INFO L93 Difference]: Finished difference Result 607 states and 983 transitions. [2021-08-21 18:12:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:12:11,390 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:12:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:11,392 INFO L225 Difference]: With dead ends: 607 [2021-08-21 18:12:11,392 INFO L226 Difference]: Without dead ends: 488 [2021-08-21 18:12:11,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 513.5ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:12:11,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-08-21 18:12:11,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 271. [2021-08-21 18:12:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.6814814814814816) internal successors, (454), 270 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 454 transitions. [2021-08-21 18:12:11,397 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 454 transitions. Word has length 31 [2021-08-21 18:12:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:11,397 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 454 transitions. [2021-08-21 18:12:11,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:11,398 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 454 transitions. [2021-08-21 18:12:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:12:11,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:11,398 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:11,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:11,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:11,613 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:11,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:11,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1297085256, now seen corresponding path program 27 times [2021-08-21 18:12:11,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:11,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955446739] [2021-08-21 18:12:11,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:11,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:11,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:11,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955446739] [2021-08-21 18:12:11,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955446739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:11,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202341874] [2021-08-21 18:12:11,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:12:11,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:11,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:11,866 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) [2021-08-21 18:12:11,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 18:12:12,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:12:12,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:12,999 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:12:12,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:13,677 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 18:12:13,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 48 [2021-08-21 18:12:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:13,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202341874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:13,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:13,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-08-21 18:12:13,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638505117] [2021-08-21 18:12:13,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:12:13,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:13,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:12:13,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:12:13,713 INFO L87 Difference]: Start difference. First operand 271 states and 454 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:14,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:14,149 INFO L93 Difference]: Finished difference Result 644 states and 1046 transitions. [2021-08-21 18:12:14,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:12:14,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:12:14,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:14,152 INFO L225 Difference]: With dead ends: 644 [2021-08-21 18:12:14,152 INFO L226 Difference]: Without dead ends: 521 [2021-08-21 18:12:14,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 494.0ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:12:14,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-21 18:12:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 270. [2021-08-21 18:12:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.6988847583643123) internal successors, (457), 269 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 457 transitions. [2021-08-21 18:12:14,158 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 457 transitions. Word has length 31 [2021-08-21 18:12:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:14,158 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 457 transitions. [2021-08-21 18:12:14,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 457 transitions. [2021-08-21 18:12:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:12:14,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:14,159 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:14,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:14,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:14,360 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:14,360 INFO L82 PathProgramCache]: Analyzing trace with hash -582057800, now seen corresponding path program 28 times [2021-08-21 18:12:14,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:14,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278489623] [2021-08-21 18:12:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:14,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:14,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:14,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278489623] [2021-08-21 18:12:14,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278489623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:14,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726312045] [2021-08-21 18:12:14,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:12:14,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:14,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:14,696 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) [2021-08-21 18:12:14,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 18:12:15,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:12:15,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:15,911 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:12:15,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:16,609 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 18:12:16,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 48 [2021-08-21 18:12:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:16,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726312045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:16,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:16,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 18:12:16,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250348382] [2021-08-21 18:12:16,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:12:16,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:16,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:12:16,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:12:16,647 INFO L87 Difference]: Start difference. First operand 270 states and 457 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:16,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:16,811 INFO L93 Difference]: Finished difference Result 623 states and 1079 transitions. [2021-08-21 18:12:16,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:12:16,811 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:12:16,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:16,813 INFO L225 Difference]: With dead ends: 623 [2021-08-21 18:12:16,813 INFO L226 Difference]: Without dead ends: 578 [2021-08-21 18:12:16,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:12:16,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-08-21 18:12:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 280. [2021-08-21 18:12:16,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.7025089605734767) internal successors, (475), 279 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:16,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 475 transitions. [2021-08-21 18:12:16,819 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 475 transitions. Word has length 31 [2021-08-21 18:12:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:16,819 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 475 transitions. [2021-08-21 18:12:16,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 475 transitions. [2021-08-21 18:12:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:12:16,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:16,820 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:16,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:17,044 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,SelfDestructingSolverStorable33 [2021-08-21 18:12:17,045 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:17,045 INFO L82 PathProgramCache]: Analyzing trace with hash -124236168, now seen corresponding path program 29 times [2021-08-21 18:12:17,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:17,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225977573] [2021-08-21 18:12:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:17,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:17,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:17,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225977573] [2021-08-21 18:12:17,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225977573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:17,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235360213] [2021-08-21 18:12:17,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:12:17,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:17,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:17,331 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) [2021-08-21 18:12:17,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 18:12:18,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:12:18,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:18,594 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:12:18,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:19,220 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 18:12:19,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 45 [2021-08-21 18:12:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:19,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235360213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:19,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:19,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-08-21 18:12:19,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805123418] [2021-08-21 18:12:19,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:12:19,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:19,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:12:19,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:12:19,256 INFO L87 Difference]: Start difference. First operand 280 states and 475 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-21 18:12:19,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:19,653 INFO L93 Difference]: Finished difference Result 641 states and 1043 transitions. [2021-08-21 18:12:19,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:12:19,653 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 31 [2021-08-21 18:12:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:19,654 INFO L225 Difference]: With dead ends: 641 [2021-08-21 18:12:19,654 INFO L226 Difference]: Without dead ends: 524 [2021-08-21 18:12:19,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 505.1ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:12:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-08-21 18:12:19,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 326. [2021-08-21 18:12:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.6953846153846155) internal successors, (551), 325 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 551 transitions. [2021-08-21 18:12:19,660 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 551 transitions. Word has length 31 [2021-08-21 18:12:19,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:19,660 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 551 transitions. [2021-08-21 18:12:19,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-21 18:12:19,661 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 551 transitions. [2021-08-21 18:12:19,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:12:19,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:19,661 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:19,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:19,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:19,886 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:19,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1789954536, now seen corresponding path program 30 times [2021-08-21 18:12:19,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:19,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363578802] [2021-08-21 18:12:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:19,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:20,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:20,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363578802] [2021-08-21 18:12:20,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363578802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:20,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121732971] [2021-08-21 18:12:20,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:12:20,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:20,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:20,152 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) [2021-08-21 18:12:20,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 18:12:21,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:12:21,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:21,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:12:21,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:22,140 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 18:12:22,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 45 [2021-08-21 18:12:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:22,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121732971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:22,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:22,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-08-21 18:12:22,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159692158] [2021-08-21 18:12:22,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:12:22,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:22,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:12:22,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:12:22,197 INFO L87 Difference]: Start difference. First operand 326 states and 551 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-21 18:12:22,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:22,392 INFO L93 Difference]: Finished difference Result 716 states and 1228 transitions. [2021-08-21 18:12:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:12:22,392 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 31 [2021-08-21 18:12:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:22,394 INFO L225 Difference]: With dead ends: 716 [2021-08-21 18:12:22,394 INFO L226 Difference]: Without dead ends: 689 [2021-08-21 18:12:22,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 318.3ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:12:22,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-08-21 18:12:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 320. [2021-08-21 18:12:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.6896551724137931) internal successors, (539), 319 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 539 transitions. [2021-08-21 18:12:22,400 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 539 transitions. Word has length 31 [2021-08-21 18:12:22,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:22,400 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 539 transitions. [2021-08-21 18:12:22,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-21 18:12:22,400 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 539 transitions. [2021-08-21 18:12:22,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:12:22,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:22,401 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:22,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 18:12:22,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:22,621 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:22,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:22,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2003379224, now seen corresponding path program 31 times [2021-08-21 18:12:22,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:22,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853575969] [2021-08-21 18:12:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:22,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:22,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:22,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853575969] [2021-08-21 18:12:22,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853575969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:22,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960664085] [2021-08-21 18:12:22,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:12:22,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:22,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:22,937 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) [2021-08-21 18:12:22,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 18:12:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:24,404 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:12:24,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:25,066 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 18:12:25,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 45 [2021-08-21 18:12:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:25,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960664085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:25,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:25,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-21 18:12:25,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117962312] [2021-08-21 18:12:25,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:12:25,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:25,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:12:25,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:12:25,102 INFO L87 Difference]: Start difference. First operand 320 states and 539 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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) [2021-08-21 18:12:25,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:25,258 INFO L93 Difference]: Finished difference Result 675 states and 1149 transitions. [2021-08-21 18:12:25,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:12:25,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 31 [2021-08-21 18:12:25,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:25,261 INFO L225 Difference]: With dead ends: 675 [2021-08-21 18:12:25,261 INFO L226 Difference]: Without dead ends: 648 [2021-08-21 18:12:25,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:12:25,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-08-21 18:12:25,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 301. [2021-08-21 18:12:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.6866666666666668) internal successors, (506), 300 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:25,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 506 transitions. [2021-08-21 18:12:25,267 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 506 transitions. Word has length 31 [2021-08-21 18:12:25,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:25,267 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 506 transitions. [2021-08-21 18:12:25,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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) [2021-08-21 18:12:25,267 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 506 transitions. [2021-08-21 18:12:25,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:12:25,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:25,268 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:25,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:25,484 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,SelfDestructingSolverStorable36 [2021-08-21 18:12:25,485 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:25,485 INFO L82 PathProgramCache]: Analyzing trace with hash -628905352, now seen corresponding path program 32 times [2021-08-21 18:12:25,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:25,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335201139] [2021-08-21 18:12:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:25,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:25,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:25,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335201139] [2021-08-21 18:12:25,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335201139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:25,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785474343] [2021-08-21 18:12:25,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:12:25,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:25,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:25,816 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) [2021-08-21 18:12:25,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 18:12:27,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:12:27,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:27,264 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:12:27,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:27,815 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 18:12:27,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 36 [2021-08-21 18:12:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:27,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785474343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:27,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:27,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-08-21 18:12:27,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65006459] [2021-08-21 18:12:27,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:12:27,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:27,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:12:27,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:12:27,851 INFO L87 Difference]: Start difference. First operand 301 states and 506 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:28,031 INFO L93 Difference]: Finished difference Result 466 states and 784 transitions. [2021-08-21 18:12:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:12:28,032 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:12:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:28,033 INFO L225 Difference]: With dead ends: 466 [2021-08-21 18:12:28,033 INFO L226 Difference]: Without dead ends: 457 [2021-08-21 18:12:28,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 307.1ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:12:28,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-08-21 18:12:28,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 307. [2021-08-21 18:12:28,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.6862745098039216) internal successors, (516), 306 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 516 transitions. [2021-08-21 18:12:28,038 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 516 transitions. Word has length 31 [2021-08-21 18:12:28,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:28,038 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 516 transitions. [2021-08-21 18:12:28,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:28,038 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 516 transitions. [2021-08-21 18:12:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:12:28,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:28,039 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:28,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:28,244 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,SelfDestructingSolverStorable37 [2021-08-21 18:12:28,245 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:28,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1937925245, now seen corresponding path program 33 times [2021-08-21 18:12:28,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:28,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976690715] [2021-08-21 18:12:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:28,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:28,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:28,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976690715] [2021-08-21 18:12:28,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976690715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:28,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130129709] [2021-08-21 18:12:28,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:12:28,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:28,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:28,307 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) [2021-08-21 18:12:28,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 18:12:29,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:12:29,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:29,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:12:29,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:29,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130129709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:29,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:29,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 18:12:29,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786515005] [2021-08-21 18:12:29,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:12:29,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:29,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:12:29,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:12:29,934 INFO L87 Difference]: Start difference. First operand 307 states and 516 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:29,963 INFO L93 Difference]: Finished difference Result 483 states and 788 transitions. [2021-08-21 18:12:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:12:29,963 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:12:29,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:29,964 INFO L225 Difference]: With dead ends: 483 [2021-08-21 18:12:29,964 INFO L226 Difference]: Without dead ends: 483 [2021-08-21 18:12:29,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:12:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-21 18:12:29,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 337. [2021-08-21 18:12:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.6964285714285714) internal successors, (570), 336 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 570 transitions. [2021-08-21 18:12:29,969 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 570 transitions. Word has length 32 [2021-08-21 18:12:29,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:29,969 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 570 transitions. [2021-08-21 18:12:29,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:29,969 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 570 transitions. [2021-08-21 18:12:29,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:12:29,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:29,970 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:30,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:30,196 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,SelfDestructingSolverStorable38 [2021-08-21 18:12:30,197 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:30,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:30,197 INFO L82 PathProgramCache]: Analyzing trace with hash -20133360, now seen corresponding path program 34 times [2021-08-21 18:12:30,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:30,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947647914] [2021-08-21 18:12:30,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:30,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:30,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:30,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947647914] [2021-08-21 18:12:30,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947647914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:30,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923503753] [2021-08-21 18:12:30,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:12:30,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:30,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:30,539 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) [2021-08-21 18:12:30,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 18:12:32,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:12:32,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:32,055 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:12:32,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:33,081 INFO L354 Elim1Store]: treesize reduction 605, result has 2.6 percent of original size [2021-08-21 18:12:33,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 64 [2021-08-21 18:12:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:33,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923503753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:33,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:33,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-08-21 18:12:33,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913684439] [2021-08-21 18:12:33,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:12:33,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:33,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:12:33,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:12:33,117 INFO L87 Difference]: Start difference. First operand 337 states and 570 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-08-21 18:12:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:33,422 INFO L93 Difference]: Finished difference Result 981 states and 1699 transitions. [2021-08-21 18:12:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:12:33,422 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 35 [2021-08-21 18:12:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:33,425 INFO L225 Difference]: With dead ends: 981 [2021-08-21 18:12:33,425 INFO L226 Difference]: Without dead ends: 936 [2021-08-21 18:12:33,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 459.3ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:12:33,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-08-21 18:12:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 409. [2021-08-21 18:12:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.6911764705882353) internal successors, (690), 408 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 690 transitions. [2021-08-21 18:12:33,431 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 690 transitions. Word has length 35 [2021-08-21 18:12:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:33,431 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 690 transitions. [2021-08-21 18:12:33,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-08-21 18:12:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 690 transitions. [2021-08-21 18:12:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:12:33,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:33,432 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:33,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:33,648 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,SelfDestructingSolverStorable39 [2021-08-21 18:12:33,649 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:33,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:33,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1475895520, now seen corresponding path program 35 times [2021-08-21 18:12:33,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:33,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534225820] [2021-08-21 18:12:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:33,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:34,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:34,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534225820] [2021-08-21 18:12:34,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534225820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:34,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645052314] [2021-08-21 18:12:34,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:12:34,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:34,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:34,008 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) [2021-08-21 18:12:34,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 18:12:35,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:12:35,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:35,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:12:35,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:36,662 INFO L354 Elim1Store]: treesize reduction 605, result has 2.6 percent of original size [2021-08-21 18:12:36,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 64 [2021-08-21 18:12:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:36,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645052314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:36,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:36,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-08-21 18:12:36,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067966900] [2021-08-21 18:12:36,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:12:36,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:36,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:12:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:12:36,698 INFO L87 Difference]: Start difference. First operand 409 states and 690 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2021-08-21 18:12:37,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:37,020 INFO L93 Difference]: Finished difference Result 975 states and 1689 transitions. [2021-08-21 18:12:37,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:12:37,020 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 35 [2021-08-21 18:12:37,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:37,022 INFO L225 Difference]: With dead ends: 975 [2021-08-21 18:12:37,022 INFO L226 Difference]: Without dead ends: 930 [2021-08-21 18:12:37,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 498.3ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:12:37,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-08-21 18:12:37,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 335. [2021-08-21 18:12:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.7005988023952097) internal successors, (568), 334 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 568 transitions. [2021-08-21 18:12:37,029 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 568 transitions. Word has length 35 [2021-08-21 18:12:37,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:37,029 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 568 transitions. [2021-08-21 18:12:37,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2021-08-21 18:12:37,029 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 568 transitions. [2021-08-21 18:12:37,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:12:37,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:37,030 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:37,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 18:12:37,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:37,242 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:37,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:37,242 INFO L82 PathProgramCache]: Analyzing trace with hash 248311584, now seen corresponding path program 36 times [2021-08-21 18:12:37,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:37,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118512238] [2021-08-21 18:12:37,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:37,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:12:37,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:37,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118512238] [2021-08-21 18:12:37,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118512238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:37,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179624653] [2021-08-21 18:12:37,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:12:37,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:37,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:37,539 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) [2021-08-21 18:12:37,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 18:12:39,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:12:39,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:39,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:12:39,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:40,265 INFO L354 Elim1Store]: treesize reduction 605, result has 2.6 percent of original size [2021-08-21 18:12:40,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 64 [2021-08-21 18:12:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:40,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179624653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:40,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:40,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-08-21 18:12:40,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957186620] [2021-08-21 18:12:40,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:12:40,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:40,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:12:40,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:12:40,305 INFO L87 Difference]: Start difference. First operand 335 states and 568 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-08-21 18:12:40,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:40,727 INFO L93 Difference]: Finished difference Result 689 states and 1129 transitions. [2021-08-21 18:12:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:12:40,727 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 35 [2021-08-21 18:12:40,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:40,729 INFO L225 Difference]: With dead ends: 689 [2021-08-21 18:12:40,729 INFO L226 Difference]: Without dead ends: 572 [2021-08-21 18:12:40,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 644.1ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:12:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-08-21 18:12:40,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 399. [2021-08-21 18:12:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.6834170854271358) internal successors, (670), 398 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 670 transitions. [2021-08-21 18:12:40,734 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 670 transitions. Word has length 35 [2021-08-21 18:12:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:40,734 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 670 transitions. [2021-08-21 18:12:40,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-08-21 18:12:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 670 transitions. [2021-08-21 18:12:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:12:40,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:40,735 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:40,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:40,940 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,SelfDestructingSolverStorable41 [2021-08-21 18:12:40,941 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:40,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2121961904, now seen corresponding path program 37 times [2021-08-21 18:12:40,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:40,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630676715] [2021-08-21 18:12:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:40,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:41,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:41,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630676715] [2021-08-21 18:12:41,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630676715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:41,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66676761] [2021-08-21 18:12:41,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:12:41,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:41,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:41,272 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) [2021-08-21 18:12:41,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 18:12:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:43,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:12:43,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:44,136 INFO L354 Elim1Store]: treesize reduction 605, result has 2.6 percent of original size [2021-08-21 18:12:44,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 64 [2021-08-21 18:12:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:44,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66676761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:44,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:44,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-08-21 18:12:44,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446345996] [2021-08-21 18:12:44,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:12:44,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:44,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:12:44,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:12:44,172 INFO L87 Difference]: Start difference. First operand 399 states and 670 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-08-21 18:12:44,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:44,392 INFO L93 Difference]: Finished difference Result 846 states and 1452 transitions. [2021-08-21 18:12:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:12:44,393 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 35 [2021-08-21 18:12:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:44,395 INFO L225 Difference]: With dead ends: 846 [2021-08-21 18:12:44,396 INFO L226 Difference]: Without dead ends: 819 [2021-08-21 18:12:44,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 465.9ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:12:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-08-21 18:12:44,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 396. [2021-08-21 18:12:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.678481012658228) internal successors, (663), 395 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 663 transitions. [2021-08-21 18:12:44,403 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 663 transitions. Word has length 35 [2021-08-21 18:12:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:44,403 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 663 transitions. [2021-08-21 18:12:44,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-08-21 18:12:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 663 transitions. [2021-08-21 18:12:44,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:12:44,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:44,404 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:44,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 18:12:44,609 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,SelfDestructingSolverStorable42 [2021-08-21 18:12:44,609 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:44,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:44,609 INFO L82 PathProgramCache]: Analyzing trace with hash 208816208, now seen corresponding path program 38 times [2021-08-21 18:12:44,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:44,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338219882] [2021-08-21 18:12:44,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:44,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:44,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:44,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338219882] [2021-08-21 18:12:44,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338219882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:44,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197242153] [2021-08-21 18:12:44,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:12:44,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:44,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:44,967 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) [2021-08-21 18:12:44,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 18:12:46,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:12:46,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:46,827 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:12:46,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:47,845 INFO L354 Elim1Store]: treesize reduction 605, result has 2.6 percent of original size [2021-08-21 18:12:47,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 64 [2021-08-21 18:12:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:47,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197242153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:47,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:47,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-08-21 18:12:47,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402955879] [2021-08-21 18:12:47,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:12:47,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:12:47,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:12:47,903 INFO L87 Difference]: Start difference. First operand 396 states and 663 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2021-08-21 18:12:48,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:48,165 INFO L93 Difference]: Finished difference Result 925 states and 1583 transitions. [2021-08-21 18:12:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:12:48,165 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 35 [2021-08-21 18:12:48,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:48,167 INFO L225 Difference]: With dead ends: 925 [2021-08-21 18:12:48,167 INFO L226 Difference]: Without dead ends: 898 [2021-08-21 18:12:48,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 497.3ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:12:48,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-08-21 18:12:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 386. [2021-08-21 18:12:48,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.6753246753246753) internal successors, (645), 385 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 645 transitions. [2021-08-21 18:12:48,175 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 645 transitions. Word has length 35 [2021-08-21 18:12:48,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:48,175 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 645 transitions. [2021-08-21 18:12:48,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2021-08-21 18:12:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 645 transitions. [2021-08-21 18:12:48,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:12:48,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:48,176 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:48,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:48,402 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,SelfDestructingSolverStorable43 [2021-08-21 18:12:48,403 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:48,403 INFO L82 PathProgramCache]: Analyzing trace with hash 948648736, now seen corresponding path program 39 times [2021-08-21 18:12:48,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:48,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234966859] [2021-08-21 18:12:48,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:48,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:48,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:48,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234966859] [2021-08-21 18:12:48,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234966859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:48,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485338431] [2021-08-21 18:12:48,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:12:48,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:48,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:48,809 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) [2021-08-21 18:12:48,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 18:12:50,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:12:50,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:50,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:12:50,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:51,870 INFO L354 Elim1Store]: treesize reduction 605, result has 2.6 percent of original size [2021-08-21 18:12:51,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 64 [2021-08-21 18:12:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:51,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485338431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:51,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:51,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-08-21 18:12:51,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132641919] [2021-08-21 18:12:51,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:12:51,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:51,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:12:51,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:12:51,907 INFO L87 Difference]: Start difference. First operand 386 states and 645 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2021-08-21 18:12:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:52,269 INFO L93 Difference]: Finished difference Result 678 states and 1152 transitions. [2021-08-21 18:12:52,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:12:52,270 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 35 [2021-08-21 18:12:52,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:52,271 INFO L225 Difference]: With dead ends: 678 [2021-08-21 18:12:52,271 INFO L226 Difference]: Without dead ends: 669 [2021-08-21 18:12:52,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 562.6ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:12:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-08-21 18:12:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 389. [2021-08-21 18:12:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.675257731958763) internal successors, (650), 388 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 650 transitions. [2021-08-21 18:12:52,276 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 650 transitions. Word has length 35 [2021-08-21 18:12:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:52,276 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 650 transitions. [2021-08-21 18:12:52,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2021-08-21 18:12:52,277 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 650 transitions. [2021-08-21 18:12:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:12:52,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:52,277 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:52,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:52,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:52,492 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:52,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:52,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1988169296, now seen corresponding path program 40 times [2021-08-21 18:12:52,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:52,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592352400] [2021-08-21 18:12:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:52,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:52,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:52,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592352400] [2021-08-21 18:12:52,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592352400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:52,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47360678] [2021-08-21 18:12:52,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:12:52,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:52,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:52,805 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) [2021-08-21 18:12:52,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 18:12:54,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:12:54,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:54,799 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:12:54,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:55,747 INFO L354 Elim1Store]: treesize reduction 492, result has 2.6 percent of original size [2021-08-21 18:12:55,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 115 treesize of output 61 [2021-08-21 18:12:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:55,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47360678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:55,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:55,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-08-21 18:12:55,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740420687] [2021-08-21 18:12:55,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:12:55,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:12:55,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:12:55,784 INFO L87 Difference]: Start difference. First operand 389 states and 650 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-08-21 18:12:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:56,307 INFO L93 Difference]: Finished difference Result 932 states and 1512 transitions. [2021-08-21 18:12:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:12:56,308 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 35 [2021-08-21 18:12:56,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:56,310 INFO L225 Difference]: With dead ends: 932 [2021-08-21 18:12:56,310 INFO L226 Difference]: Without dead ends: 784 [2021-08-21 18:12:56,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 662.6ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:12:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-08-21 18:12:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 504. [2021-08-21 18:12:56,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.68389662027833) internal successors, (847), 503 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 847 transitions. [2021-08-21 18:12:56,321 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 847 transitions. Word has length 35 [2021-08-21 18:12:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:56,321 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 847 transitions. [2021-08-21 18:12:56,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-08-21 18:12:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 847 transitions. [2021-08-21 18:12:56,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:12:56,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:56,322 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:56,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:56,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:56,537 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:56,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1948673920, now seen corresponding path program 41 times [2021-08-21 18:12:56,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:56,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547791130] [2021-08-21 18:12:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:56,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:56,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:56,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547791130] [2021-08-21 18:12:56,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547791130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:56,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547363328] [2021-08-21 18:12:56,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:12:56,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:56,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:56,909 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) [2021-08-21 18:12:56,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 18:12:58,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:12:58,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:58,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:12:58,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:00,003 INFO L354 Elim1Store]: treesize reduction 492, result has 2.6 percent of original size [2021-08-21 18:13:00,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 115 treesize of output 61 [2021-08-21 18:13:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:00,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547363328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:00,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:00,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 18:13:00,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181538946] [2021-08-21 18:13:00,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:13:00,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:00,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:13:00,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:13:00,040 INFO L87 Difference]: Start difference. First operand 504 states and 847 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-08-21 18:13:00,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:00,372 INFO L93 Difference]: Finished difference Result 1292 states and 2215 transitions. [2021-08-21 18:13:00,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:13:00,372 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 35 [2021-08-21 18:13:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:00,375 INFO L225 Difference]: With dead ends: 1292 [2021-08-21 18:13:00,375 INFO L226 Difference]: Without dead ends: 1229 [2021-08-21 18:13:00,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 529.9ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:13:00,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-08-21 18:13:00,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 583. [2021-08-21 18:13:00,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 1.6804123711340206) internal successors, (978), 582 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:00,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 978 transitions. [2021-08-21 18:13:00,385 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 978 transitions. Word has length 35 [2021-08-21 18:13:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:00,385 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 978 transitions. [2021-08-21 18:13:00,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-08-21 18:13:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 978 transitions. [2021-08-21 18:13:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:13:00,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:00,386 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:00,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:00,595 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,SelfDestructingSolverStorable46 [2021-08-21 18:13:00,596 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:00,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:00,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1606460848, now seen corresponding path program 42 times [2021-08-21 18:13:00,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:00,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798660935] [2021-08-21 18:13:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:00,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:01,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:01,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798660935] [2021-08-21 18:13:01,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798660935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:01,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102696053] [2021-08-21 18:13:01,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:13:01,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:01,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:01,075 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) [2021-08-21 18:13:01,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 18:13:03,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:13:03,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:03,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:13:03,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:04,238 INFO L354 Elim1Store]: treesize reduction 492, result has 2.6 percent of original size [2021-08-21 18:13:04,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 115 treesize of output 61 [2021-08-21 18:13:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:04,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102696053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:04,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:04,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 18:13:04,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069283052] [2021-08-21 18:13:04,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:13:04,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:04,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:13:04,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:13:04,275 INFO L87 Difference]: Start difference. First operand 583 states and 978 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-08-21 18:13:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:04,483 INFO L93 Difference]: Finished difference Result 860 states and 1456 transitions. [2021-08-21 18:13:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:13:04,483 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 35 [2021-08-21 18:13:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:04,486 INFO L225 Difference]: With dead ends: 860 [2021-08-21 18:13:04,486 INFO L226 Difference]: Without dead ends: 851 [2021-08-21 18:13:04,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 493.9ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:13:04,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2021-08-21 18:13:04,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 586. [2021-08-21 18:13:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.6803418803418804) internal successors, (983), 585 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:04,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 983 transitions. [2021-08-21 18:13:04,495 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 983 transitions. Word has length 35 [2021-08-21 18:13:04,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:04,496 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 983 transitions. [2021-08-21 18:13:04,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-08-21 18:13:04,496 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 983 transitions. [2021-08-21 18:13:04,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:13:04,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:04,497 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:04,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:04,708 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,SelfDestructingSolverStorable47 [2021-08-21 18:13:04,709 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:04,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:04,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1135031520, now seen corresponding path program 43 times [2021-08-21 18:13:04,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:04,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210575016] [2021-08-21 18:13:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:04,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:05,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:05,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210575016] [2021-08-21 18:13:05,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210575016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:05,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315204193] [2021-08-21 18:13:05,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:13:05,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:05,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:05,077 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) [2021-08-21 18:13:05,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 18:13:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:07,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:13:07,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:08,258 INFO L354 Elim1Store]: treesize reduction 391, result has 2.5 percent of original size [2021-08-21 18:13:08,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 115 treesize of output 58 [2021-08-21 18:13:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:08,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315204193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:08,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:08,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 18:13:08,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473230534] [2021-08-21 18:13:08,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:13:08,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:08,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:13:08,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:13:08,294 INFO L87 Difference]: Start difference. First operand 586 states and 983 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-08-21 18:13:08,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:08,528 INFO L93 Difference]: Finished difference Result 1142 states and 1930 transitions. [2021-08-21 18:13:08,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:13:08,528 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 35 [2021-08-21 18:13:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:08,531 INFO L225 Difference]: With dead ends: 1142 [2021-08-21 18:13:08,531 INFO L226 Difference]: Without dead ends: 1124 [2021-08-21 18:13:08,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 473.9ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:13:08,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-08-21 18:13:08,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 605. [2021-08-21 18:13:08,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.685430463576159) internal successors, (1018), 604 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:08,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1018 transitions. [2021-08-21 18:13:08,539 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1018 transitions. Word has length 35 [2021-08-21 18:13:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:08,540 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 1018 transitions. [2021-08-21 18:13:08,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-08-21 18:13:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1018 transitions. [2021-08-21 18:13:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:13:08,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:08,541 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:08,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:08,749 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,SelfDestructingSolverStorable48 [2021-08-21 18:13:08,749 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:08,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:08,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1480402416, now seen corresponding path program 44 times [2021-08-21 18:13:08,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:08,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376197721] [2021-08-21 18:13:08,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:08,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:09,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:09,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376197721] [2021-08-21 18:13:09,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376197721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:09,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376768855] [2021-08-21 18:13:09,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:13:09,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:09,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:09,098 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) [2021-08-21 18:13:09,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 18:13:11,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:13:11,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:11,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:13:11,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:12,394 INFO L354 Elim1Store]: treesize reduction 391, result has 2.5 percent of original size [2021-08-21 18:13:12,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 115 treesize of output 58 [2021-08-21 18:13:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:12,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376768855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:12,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:12,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 18:13:12,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635834312] [2021-08-21 18:13:12,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:13:12,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:12,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:13:12,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:13:12,435 INFO L87 Difference]: Start difference. First operand 605 states and 1018 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:12,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:12,904 INFO L93 Difference]: Finished difference Result 1259 states and 2087 transitions. [2021-08-21 18:13:12,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:13:12,904 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:13:12,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:12,908 INFO L225 Difference]: With dead ends: 1259 [2021-08-21 18:13:12,908 INFO L226 Difference]: Without dead ends: 1129 [2021-08-21 18:13:12,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 667.3ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:13:12,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-08-21 18:13:12,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 749. [2021-08-21 18:13:12,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.6871657754010696) internal successors, (1262), 748 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1262 transitions. [2021-08-21 18:13:12,918 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1262 transitions. Word has length 35 [2021-08-21 18:13:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:12,918 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1262 transitions. [2021-08-21 18:13:12,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1262 transitions. [2021-08-21 18:13:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:13:12,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:12,920 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:12,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 18:13:13,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:13,121 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:13,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:13,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1536244784, now seen corresponding path program 45 times [2021-08-21 18:13:13,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:13,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425541646] [2021-08-21 18:13:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:13,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:13:13,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:13,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425541646] [2021-08-21 18:13:13,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425541646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:13,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64878642] [2021-08-21 18:13:13,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:13:13,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:13,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:13,430 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) [2021-08-21 18:13:13,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 18:13:15,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:13:15,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:15,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:13:15,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:16,755 INFO L354 Elim1Store]: treesize reduction 302, result has 2.3 percent of original size [2021-08-21 18:13:16,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 55 [2021-08-21 18:13:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:16,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64878642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:16,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:16,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 19 [2021-08-21 18:13:16,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644246] [2021-08-21 18:13:16,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:13:16,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:16,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:13:16,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:13:16,791 INFO L87 Difference]: Start difference. First operand 749 states and 1262 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:17,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:17,320 INFO L93 Difference]: Finished difference Result 1408 states and 2364 transitions. [2021-08-21 18:13:17,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:13:17,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:13:17,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:17,323 INFO L225 Difference]: With dead ends: 1408 [2021-08-21 18:13:17,324 INFO L226 Difference]: Without dead ends: 1297 [2021-08-21 18:13:17,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 640.9ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:13:17,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-08-21 18:13:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 777. [2021-08-21 18:13:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.690721649484536) internal successors, (1312), 776 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1312 transitions. [2021-08-21 18:13:17,336 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1312 transitions. Word has length 35 [2021-08-21 18:13:17,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:17,337 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1312 transitions. [2021-08-21 18:13:17,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1312 transitions. [2021-08-21 18:13:17,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:13:17,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:17,338 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:17,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 18:13:17,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:17,538 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:17,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:17,539 INFO L82 PathProgramCache]: Analyzing trace with hash -433050608, now seen corresponding path program 46 times [2021-08-21 18:13:17,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:17,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677221072] [2021-08-21 18:13:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:17,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:17,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:17,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677221072] [2021-08-21 18:13:17,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677221072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:17,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334899202] [2021-08-21 18:13:17,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:13:17,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:17,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:17,963 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) [2021-08-21 18:13:17,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 18:13:20,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:13:20,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:20,533 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:13:20,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:21,381 INFO L354 Elim1Store]: treesize reduction 302, result has 2.3 percent of original size [2021-08-21 18:13:21,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 55 [2021-08-21 18:13:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:21,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334899202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:21,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:21,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 20 [2021-08-21 18:13:21,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122078321] [2021-08-21 18:13:21,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:13:21,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:13:21,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:13:21,417 INFO L87 Difference]: Start difference. First operand 777 states and 1312 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-08-21 18:13:21,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:21,701 INFO L93 Difference]: Finished difference Result 1548 states and 2582 transitions. [2021-08-21 18:13:21,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:13:21,702 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 35 [2021-08-21 18:13:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:21,710 INFO L225 Difference]: With dead ends: 1548 [2021-08-21 18:13:21,710 INFO L226 Difference]: Without dead ends: 1442 [2021-08-21 18:13:21,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:13:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-08-21 18:13:21,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 864. [2021-08-21 18:13:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 1.697566628041715) internal successors, (1465), 863 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1465 transitions. [2021-08-21 18:13:21,725 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1465 transitions. Word has length 35 [2021-08-21 18:13:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:21,726 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1465 transitions. [2021-08-21 18:13:21,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-08-21 18:13:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1465 transitions. [2021-08-21 18:13:21,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:13:21,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:21,727 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:21,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:21,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:21,948 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:21,948 INFO L82 PathProgramCache]: Analyzing trace with hash 267286544, now seen corresponding path program 47 times [2021-08-21 18:13:21,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:21,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953119778] [2021-08-21 18:13:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:21,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:22,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:22,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953119778] [2021-08-21 18:13:22,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953119778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:22,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741410881] [2021-08-21 18:13:22,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:13:22,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:22,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:22,338 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) [2021-08-21 18:13:22,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 18:13:24,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:13:24,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:24,849 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:13:24,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:25,738 INFO L354 Elim1Store]: treesize reduction 302, result has 2.3 percent of original size [2021-08-21 18:13:25,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 55 [2021-08-21 18:13:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:25,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741410881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:25,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:25,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-21 18:13:25,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486901865] [2021-08-21 18:13:25,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:13:25,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:13:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:13:25,774 INFO L87 Difference]: Start difference. First operand 864 states and 1465 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:26,073 INFO L93 Difference]: Finished difference Result 1542 states and 2658 transitions. [2021-08-21 18:13:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:13:26,073 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:13:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:26,075 INFO L225 Difference]: With dead ends: 1542 [2021-08-21 18:13:26,075 INFO L226 Difference]: Without dead ends: 1479 [2021-08-21 18:13:26,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 431.7ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:13:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-08-21 18:13:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 876. [2021-08-21 18:13:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 1.6994285714285715) internal successors, (1487), 875 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1487 transitions. [2021-08-21 18:13:26,086 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1487 transitions. Word has length 35 [2021-08-21 18:13:26,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:26,086 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1487 transitions. [2021-08-21 18:13:26,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:26,086 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1487 transitions. [2021-08-21 18:13:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:13:26,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:26,087 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:26,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:26,288 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,SelfDestructingSolverStorable52 [2021-08-21 18:13:26,288 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:26,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:26,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1057803616, now seen corresponding path program 48 times [2021-08-21 18:13:26,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:26,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001759603] [2021-08-21 18:13:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:26,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:26,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:26,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001759603] [2021-08-21 18:13:26,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001759603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:26,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680800105] [2021-08-21 18:13:26,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:13:26,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:26,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:26,665 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) [2021-08-21 18:13:26,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 18:13:29,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:13:29,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:29,297 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:13:29,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:30,143 INFO L354 Elim1Store]: treesize reduction 226, result has 1.3 percent of original size [2021-08-21 18:13:30,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 115 treesize of output 52 [2021-08-21 18:13:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:30,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680800105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:30,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:30,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 19 [2021-08-21 18:13:30,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923204581] [2021-08-21 18:13:30,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:13:30,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:30,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:13:30,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:13:30,180 INFO L87 Difference]: Start difference. First operand 876 states and 1487 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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) [2021-08-21 18:13:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:30,443 INFO L93 Difference]: Finished difference Result 1528 states and 2576 transitions. [2021-08-21 18:13:30,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:13:30,443 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 35 [2021-08-21 18:13:30,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:30,446 INFO L225 Difference]: With dead ends: 1528 [2021-08-21 18:13:30,446 INFO L226 Difference]: Without dead ends: 1434 [2021-08-21 18:13:30,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 409.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:13:30,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-08-21 18:13:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 945. [2021-08-21 18:13:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 1.7076271186440677) internal successors, (1612), 944 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1612 transitions. [2021-08-21 18:13:30,458 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1612 transitions. Word has length 35 [2021-08-21 18:13:30,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:30,458 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1612 transitions. [2021-08-21 18:13:30,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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) [2021-08-21 18:13:30,458 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1612 transitions. [2021-08-21 18:13:30,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:13:30,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:30,459 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:30,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 18:13:30,660 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,SelfDestructingSolverStorable53 [2021-08-21 18:13:30,660 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:30,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:30,660 INFO L82 PathProgramCache]: Analyzing trace with hash 402856096, now seen corresponding path program 49 times [2021-08-21 18:13:30,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:30,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452536557] [2021-08-21 18:13:30,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:30,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:31,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:31,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452536557] [2021-08-21 18:13:31,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452536557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:31,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926840193] [2021-08-21 18:13:31,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:13:31,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:31,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:31,075 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) [2021-08-21 18:13:31,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 18:13:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:33,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:13:33,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:34,616 INFO L354 Elim1Store]: treesize reduction 226, result has 1.3 percent of original size [2021-08-21 18:13:34,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 115 treesize of output 52 [2021-08-21 18:13:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:34,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926840193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:34,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:34,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 20 [2021-08-21 18:13:34,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326112559] [2021-08-21 18:13:34,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:13:34,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:34,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:13:34,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:13:34,653 INFO L87 Difference]: Start difference. First operand 945 states and 1612 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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) [2021-08-21 18:13:34,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:34,887 INFO L93 Difference]: Finished difference Result 1737 states and 2972 transitions. [2021-08-21 18:13:34,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:13:34,887 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 35 [2021-08-21 18:13:34,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:34,889 INFO L225 Difference]: With dead ends: 1737 [2021-08-21 18:13:34,889 INFO L226 Difference]: Without dead ends: 1710 [2021-08-21 18:13:34,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 464.9ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:13:34,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-08-21 18:13:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 916. [2021-08-21 18:13:34,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.7038251366120218) internal successors, (1559), 915 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:34,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1559 transitions. [2021-08-21 18:13:34,900 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1559 transitions. Word has length 35 [2021-08-21 18:13:34,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:34,900 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1559 transitions. [2021-08-21 18:13:34,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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) [2021-08-21 18:13:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1559 transitions. [2021-08-21 18:13:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:13:34,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:34,901 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:34,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:35,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:35,107 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:35,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:35,108 INFO L82 PathProgramCache]: Analyzing trace with hash -357466464, now seen corresponding path program 50 times [2021-08-21 18:13:35,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:35,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630631147] [2021-08-21 18:13:35,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:35,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:35,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:35,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630631147] [2021-08-21 18:13:35,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630631147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:35,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698988008] [2021-08-21 18:13:35,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:13:35,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:35,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:35,525 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) [2021-08-21 18:13:35,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 18:13:38,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:13:38,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:38,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:13:38,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:39,180 INFO L354 Elim1Store]: treesize reduction 226, result has 1.3 percent of original size [2021-08-21 18:13:39,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 115 treesize of output 52 [2021-08-21 18:13:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:39,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698988008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:39,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:39,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-08-21 18:13:39,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333617563] [2021-08-21 18:13:39,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:13:39,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:39,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:13:39,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:13:39,216 INFO L87 Difference]: Start difference. First operand 916 states and 1559 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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) [2021-08-21 18:13:39,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:39,482 INFO L93 Difference]: Finished difference Result 1566 states and 2678 transitions. [2021-08-21 18:13:39,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:13:39,482 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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 35 [2021-08-21 18:13:39,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:39,484 INFO L225 Difference]: With dead ends: 1566 [2021-08-21 18:13:39,484 INFO L226 Difference]: Without dead ends: 1539 [2021-08-21 18:13:39,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 443.8ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:13:39,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-08-21 18:13:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 916. [2021-08-21 18:13:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.7038251366120218) internal successors, (1559), 915 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:39,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1559 transitions. [2021-08-21 18:13:39,495 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1559 transitions. Word has length 35 [2021-08-21 18:13:39,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:39,495 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1559 transitions. [2021-08-21 18:13:39,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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) [2021-08-21 18:13:39,495 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1559 transitions. [2021-08-21 18:13:39,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:13:39,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:39,497 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:39,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:39,724 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,SelfDestructingSolverStorable55 [2021-08-21 18:13:39,725 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:39,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:39,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1102505424, now seen corresponding path program 51 times [2021-08-21 18:13:39,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:39,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716663097] [2021-08-21 18:13:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:39,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:40,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:40,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716663097] [2021-08-21 18:13:40,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716663097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:40,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069368526] [2021-08-21 18:13:40,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:13:40,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:40,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:40,128 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) [2021-08-21 18:13:40,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 18:13:43,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:13:43,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:43,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:13:43,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:43,795 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-08-21 18:13:43,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 43 [2021-08-21 18:13:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:43,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069368526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:43,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:43,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-08-21 18:13:43,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63787848] [2021-08-21 18:13:43,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:13:43,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:43,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:13:43,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:13:43,831 INFO L87 Difference]: Start difference. First operand 916 states and 1559 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-08-21 18:13:44,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:44,043 INFO L93 Difference]: Finished difference Result 1293 states and 2201 transitions. [2021-08-21 18:13:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:13:44,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 35 [2021-08-21 18:13:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:44,046 INFO L225 Difference]: With dead ends: 1293 [2021-08-21 18:13:44,046 INFO L226 Difference]: Without dead ends: 1284 [2021-08-21 18:13:44,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 403.5ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:13:44,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-08-21 18:13:44,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 922. [2021-08-21 18:13:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 1.703583061889251) internal successors, (1569), 921 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1569 transitions. [2021-08-21 18:13:44,060 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1569 transitions. Word has length 35 [2021-08-21 18:13:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:44,060 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1569 transitions. [2021-08-21 18:13:44,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-08-21 18:13:44,060 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1569 transitions. [2021-08-21 18:13:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:13:44,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:44,061 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:44,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 18:13:44,276 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,SelfDestructingSolverStorable56 [2021-08-21 18:13:44,277 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:44,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:44,277 INFO L82 PathProgramCache]: Analyzing trace with hash -222915547, now seen corresponding path program 52 times [2021-08-21 18:13:44,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:44,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196429480] [2021-08-21 18:13:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:44,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:44,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:44,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196429480] [2021-08-21 18:13:44,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196429480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:44,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126670048] [2021-08-21 18:13:44,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:13:44,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:44,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:44,350 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) [2021-08-21 18:13:44,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 18:13:47,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:13:47,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:47,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 18:13:47,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:47,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126670048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:47,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:47,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 18:13:47,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736166116] [2021-08-21 18:13:47,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:13:47,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:47,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:13:47,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:13:47,413 INFO L87 Difference]: Start difference. First operand 922 states and 1569 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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) [2021-08-21 18:13:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:47,446 INFO L93 Difference]: Finished difference Result 1172 states and 1962 transitions. [2021-08-21 18:13:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:13:47,446 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 36 [2021-08-21 18:13:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:47,448 INFO L225 Difference]: With dead ends: 1172 [2021-08-21 18:13:47,448 INFO L226 Difference]: Without dead ends: 1172 [2021-08-21 18:13:47,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:13:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-08-21 18:13:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 964. [2021-08-21 18:13:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 1.7061266874350987) internal successors, (1643), 963 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1643 transitions. [2021-08-21 18:13:47,460 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1643 transitions. Word has length 36 [2021-08-21 18:13:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:47,460 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 1643 transitions. [2021-08-21 18:13:47,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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) [2021-08-21 18:13:47,461 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1643 transitions. [2021-08-21 18:13:47,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 18:13:47,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:47,462 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:47,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 18:13:47,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:47,663 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:47,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:47,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1749198835, now seen corresponding path program 53 times [2021-08-21 18:13:47,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:47,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484319705] [2021-08-21 18:13:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:47,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:47,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:47,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484319705] [2021-08-21 18:13:47,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484319705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:47,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355546666] [2021-08-21 18:13:47,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:13:47,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:47,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:47,984 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) [2021-08-21 18:13:47,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 18:13:50,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:13:50,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:50,923 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:13:50,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:51,945 INFO L354 Elim1Store]: treesize reduction 302, result has 2.3 percent of original size [2021-08-21 18:13:51,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 55 [2021-08-21 18:13:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:51,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355546666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:51,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:51,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-08-21 18:13:51,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505529908] [2021-08-21 18:13:51,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:13:51,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:51,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:13:51,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:13:51,998 INFO L87 Difference]: Start difference. First operand 964 states and 1643 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2021-08-21 18:13:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:52,713 INFO L93 Difference]: Finished difference Result 2167 states and 3680 transitions. [2021-08-21 18:13:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:13:52,719 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 38 [2021-08-21 18:13:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:52,723 INFO L225 Difference]: With dead ends: 2167 [2021-08-21 18:13:52,723 INFO L226 Difference]: Without dead ends: 1981 [2021-08-21 18:13:52,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 831.3ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:13:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2021-08-21 18:13:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1048. [2021-08-21 18:13:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 1.7048710601719197) internal successors, (1785), 1047 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1785 transitions. [2021-08-21 18:13:52,738 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1785 transitions. Word has length 38 [2021-08-21 18:13:52,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:52,738 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 1785 transitions. [2021-08-21 18:13:52,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2021-08-21 18:13:52,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1785 transitions. [2021-08-21 18:13:52,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:13:52,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:52,739 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:52,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:52,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:52,951 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:52,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:52,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1429202920, now seen corresponding path program 54 times [2021-08-21 18:13:52,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:52,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273715134] [2021-08-21 18:13:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:52,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:53,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:53,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273715134] [2021-08-21 18:13:53,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273715134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:53,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735137109] [2021-08-21 18:13:53,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:13:53,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:53,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:53,405 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) [2021-08-21 18:13:53,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 18:13:56,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 18:13:56,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:56,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:13:56,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:57,764 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 18:13:57,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 18:13:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:57,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735137109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:57,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:57,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-08-21 18:13:57,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308944937] [2021-08-21 18:13:57,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:13:57,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:57,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:13:57,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:13:57,805 INFO L87 Difference]: Start difference. First operand 1048 states and 1785 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-21 18:13:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:58,313 INFO L93 Difference]: Finished difference Result 2002 states and 3436 transitions. [2021-08-21 18:13:58,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:13:58,314 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:13:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:58,317 INFO L225 Difference]: With dead ends: 2002 [2021-08-21 18:13:58,317 INFO L226 Difference]: Without dead ends: 1975 [2021-08-21 18:13:58,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 609.2ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:13:58,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-08-21 18:13:58,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1050. [2021-08-21 18:13:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 1.7035271687321258) internal successors, (1787), 1049 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1787 transitions. [2021-08-21 18:13:58,333 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1787 transitions. Word has length 39 [2021-08-21 18:13:58,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:58,334 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1787 transitions. [2021-08-21 18:13:58,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-21 18:13:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1787 transitions. [2021-08-21 18:13:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:13:58,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:58,335 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:58,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:58,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 18:13:58,561 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:58,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:58,561 INFO L82 PathProgramCache]: Analyzing trace with hash -54729048, now seen corresponding path program 55 times [2021-08-21 18:13:58,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:58,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379356801] [2021-08-21 18:13:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:58,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:58,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:58,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379356801] [2021-08-21 18:13:58,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379356801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:58,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456797388] [2021-08-21 18:13:58,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:13:58,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:58,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:58,946 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) [2021-08-21 18:13:58,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 18:14:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:02,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:14:02,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:03,466 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 18:14:03,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 18:14:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:03,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456797388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:03,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:03,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-08-21 18:14:03,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835778061] [2021-08-21 18:14:03,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:14:03,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:03,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:14:03,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:14:03,502 INFO L87 Difference]: Start difference. First operand 1050 states and 1787 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-21 18:14:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:03,913 INFO L93 Difference]: Finished difference Result 1774 states and 3040 transitions. [2021-08-21 18:14:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:14:03,914 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:14:03,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:03,916 INFO L225 Difference]: With dead ends: 1774 [2021-08-21 18:14:03,916 INFO L226 Difference]: Without dead ends: 1765 [2021-08-21 18:14:03,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 582.9ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:14:03,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-08-21 18:14:03,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1056. [2021-08-21 18:14:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 1.7033175355450236) internal successors, (1797), 1055 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1797 transitions. [2021-08-21 18:14:03,932 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1797 transitions. Word has length 39 [2021-08-21 18:14:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:03,932 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 1797 transitions. [2021-08-21 18:14:03,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-21 18:14:03,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1797 transitions. [2021-08-21 18:14:03,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:14:03,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:03,934 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:03,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 18:14:04,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:04,161 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:14:04,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:04,161 INFO L82 PathProgramCache]: Analyzing trace with hash -849025512, now seen corresponding path program 56 times [2021-08-21 18:14:04,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:04,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55515370] [2021-08-21 18:14:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:04,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:04,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:04,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55515370] [2021-08-21 18:14:04,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55515370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:04,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196788054] [2021-08-21 18:14:04,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:14:04,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:04,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:04,509 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) [2021-08-21 18:14:04,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 18:14:07,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:14:07,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:07,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:14:07,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:09,225 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 18:14:09,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 18:14:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:09,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196788054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:09,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:09,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-08-21 18:14:09,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037406811] [2021-08-21 18:14:09,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:14:09,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:09,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:14:09,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:14:09,261 INFO L87 Difference]: Start difference. First operand 1056 states and 1797 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) 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) [2021-08-21 18:14:09,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:09,832 INFO L93 Difference]: Finished difference Result 1770 states and 2956 transitions. [2021-08-21 18:14:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:14:09,833 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) 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 39 [2021-08-21 18:14:09,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:09,836 INFO L225 Difference]: With dead ends: 1770 [2021-08-21 18:14:09,836 INFO L226 Difference]: Without dead ends: 1615 [2021-08-21 18:14:09,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 800.2ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:14:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-08-21 18:14:09,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1088. [2021-08-21 18:14:09,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 1.6973321067157314) internal successors, (1845), 1087 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:09,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1845 transitions. [2021-08-21 18:14:09,853 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1845 transitions. Word has length 39 [2021-08-21 18:14:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:09,853 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1845 transitions. [2021-08-21 18:14:09,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) 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) [2021-08-21 18:14:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1845 transitions. [2021-08-21 18:14:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:14:09,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:09,855 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:09,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 18:14:10,076 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,SelfDestructingSolverStorable61 [2021-08-21 18:14:10,077 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:14:10,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:10,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1566798728, now seen corresponding path program 57 times [2021-08-21 18:14:10,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:10,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506373577] [2021-08-21 18:14:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:10,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:10,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:10,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506373577] [2021-08-21 18:14:10,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506373577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:10,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059339545] [2021-08-21 18:14:10,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:14:10,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:10,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:10,470 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) [2021-08-21 18:14:10,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 18:14:13,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 18:14:13,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:13,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:14:13,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:15,183 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 18:14:15,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 18:14:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:15,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059339545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:15,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:15,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-08-21 18:14:15,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054996175] [2021-08-21 18:14:15,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:14:15,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:15,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:14:15,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:14:15,223 INFO L87 Difference]: Start difference. First operand 1088 states and 1845 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-21 18:14:15,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:15,619 INFO L93 Difference]: Finished difference Result 2304 states and 3988 transitions. [2021-08-21 18:14:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:14:15,619 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:14:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:15,624 INFO L225 Difference]: With dead ends: 2304 [2021-08-21 18:14:15,624 INFO L226 Difference]: Without dead ends: 2239 [2021-08-21 18:14:15,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 620.1ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:14:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2021-08-21 18:14:15,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 811. [2021-08-21 18:14:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 1.708641975308642) internal successors, (1384), 810 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:15,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1384 transitions. [2021-08-21 18:14:15,641 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1384 transitions. Word has length 39 [2021-08-21 18:14:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:15,641 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1384 transitions. [2021-08-21 18:14:15,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-21 18:14:15,641 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1384 transitions. [2021-08-21 18:14:15,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:14:15,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:15,642 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:15,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 18:14:15,864 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,SelfDestructingSolverStorable62 [2021-08-21 18:14:15,865 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:14:15,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:15,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1353694696, now seen corresponding path program 58 times [2021-08-21 18:14:15,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:15,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761639482] [2021-08-21 18:14:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:15,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:16,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:16,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761639482] [2021-08-21 18:14:16,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761639482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:16,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383316388] [2021-08-21 18:14:16,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:14:16,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:16,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:16,279 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) [2021-08-21 18:14:16,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 18:14:19,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:14:19,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:19,793 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:14:19,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:21,183 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 18:14:21,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 18:14:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:21,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383316388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:21,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:21,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-08-21 18:14:21,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703866071] [2021-08-21 18:14:21,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:14:21,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:21,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:14:21,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:14:21,220 INFO L87 Difference]: Start difference. First operand 811 states and 1384 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-21 18:14:21,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:21,687 INFO L93 Difference]: Finished difference Result 1760 states and 3018 transitions. [2021-08-21 18:14:21,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:14:21,688 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:14:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:21,690 INFO L225 Difference]: With dead ends: 1760 [2021-08-21 18:14:21,690 INFO L226 Difference]: Without dead ends: 1751 [2021-08-21 18:14:21,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 633.4ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:14:21,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2021-08-21 18:14:21,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 833. [2021-08-21 18:14:21,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 1.7115384615384615) internal successors, (1424), 832 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1424 transitions. [2021-08-21 18:14:21,703 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1424 transitions. Word has length 39 [2021-08-21 18:14:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:21,703 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1424 transitions. [2021-08-21 18:14:21,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-21 18:14:21,703 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1424 transitions. [2021-08-21 18:14:21,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:14:21,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:21,705 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:21,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 18:14:21,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:21,913 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:14:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:21,914 INFO L82 PathProgramCache]: Analyzing trace with hash -936120088, now seen corresponding path program 59 times [2021-08-21 18:14:21,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:21,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705480259] [2021-08-21 18:14:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:21,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:22,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:22,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705480259] [2021-08-21 18:14:22,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705480259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:22,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175963888] [2021-08-21 18:14:22,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:14:22,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:22,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:22,330 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) [2021-08-21 18:14:22,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 18:14:25,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:14:25,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:25,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:14:25,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:27,293 INFO L354 Elim1Store]: treesize reduction 1019, result has 2.1 percent of original size [2021-08-21 18:14:27,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 98 treesize of output 67 [2021-08-21 18:14:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:27,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175963888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:27,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:27,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-08-21 18:14:27,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944407006] [2021-08-21 18:14:27,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:14:27,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:27,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:14:27,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:14:27,350 INFO L87 Difference]: Start difference. First operand 833 states and 1424 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:29,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:29,369 INFO L93 Difference]: Finished difference Result 1965 states and 3314 transitions. [2021-08-21 18:14:29,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:14:29,370 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:14:29,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:29,372 INFO L225 Difference]: With dead ends: 1965 [2021-08-21 18:14:29,373 INFO L226 Difference]: Without dead ends: 1755 [2021-08-21 18:14:29,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1986.1ms TimeCoverageRelationStatistics Valid=239, Invalid=2623, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:14:29,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-08-21 18:14:29,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 878. [2021-08-21 18:14:29,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 1.7160775370581527) internal successors, (1505), 877 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1505 transitions. [2021-08-21 18:14:29,389 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1505 transitions. Word has length 39 [2021-08-21 18:14:29,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:29,389 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1505 transitions. [2021-08-21 18:14:29,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1505 transitions. [2021-08-21 18:14:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:14:29,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:29,390 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:29,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 18:14:29,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:29,617 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:14:29,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:29,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1051814488, now seen corresponding path program 60 times [2021-08-21 18:14:29,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:29,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101087572] [2021-08-21 18:14:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:29,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:30,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:30,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101087572] [2021-08-21 18:14:30,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101087572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:30,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753716402] [2021-08-21 18:14:30,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:14:30,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:30,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:30,125 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) [2021-08-21 18:14:30,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 18:14:33,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 18:14:33,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:33,717 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-21 18:14:33,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:35,103 INFO L354 Elim1Store]: treesize reduction 894, result has 2.1 percent of original size [2021-08-21 18:14:35,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 138 treesize of output 76 [2021-08-21 18:14:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:35,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753716402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:35,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:35,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-08-21 18:14:35,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537935753] [2021-08-21 18:14:35,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:14:35,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:35,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:14:35,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:14:35,140 INFO L87 Difference]: Start difference. First operand 878 states and 1505 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-21 18:14:35,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:35,664 INFO L93 Difference]: Finished difference Result 1354 states and 2303 transitions. [2021-08-21 18:14:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:14:35,677 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:14:35,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:35,678 INFO L225 Difference]: With dead ends: 1354 [2021-08-21 18:14:35,679 INFO L226 Difference]: Without dead ends: 1340 [2021-08-21 18:14:35,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 868.7ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:14:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-08-21 18:14:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 989. [2021-08-21 18:14:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 1.7064777327935223) internal successors, (1686), 988 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1686 transitions. [2021-08-21 18:14:35,689 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1686 transitions. Word has length 39 [2021-08-21 18:14:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:35,689 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 1686 transitions. [2021-08-21 18:14:35,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-21 18:14:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1686 transitions. [2021-08-21 18:14:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:14:35,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:35,690 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:35,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 18:14:35,893 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,SelfDestructingSolverStorable65 [2021-08-21 18:14:35,893 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:14:35,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:35,893 INFO L82 PathProgramCache]: Analyzing trace with hash 980493464, now seen corresponding path program 61 times [2021-08-21 18:14:35,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:35,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089311445] [2021-08-21 18:14:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:35,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:14:36,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:36,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089311445] [2021-08-21 18:14:36,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089311445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:36,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119591328] [2021-08-21 18:14:36,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:14:36,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:36,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:36,267 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) [2021-08-21 18:14:36,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 18:14:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:40,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:14:40,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:41,378 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 18:14:41,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 18:14:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:41,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119591328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:41,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:41,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-08-21 18:14:41,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532120947] [2021-08-21 18:14:41,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:14:41,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:41,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:14:41,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:14:41,416 INFO L87 Difference]: Start difference. First operand 989 states and 1686 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2021-08-21 18:14:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:42,033 INFO L93 Difference]: Finished difference Result 1476 states and 2517 transitions. [2021-08-21 18:14:42,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:14:42,034 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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 39 [2021-08-21 18:14:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:42,035 INFO L225 Difference]: With dead ends: 1476 [2021-08-21 18:14:42,035 INFO L226 Difference]: Without dead ends: 1462 [2021-08-21 18:14:42,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 873.0ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:14:42,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-08-21 18:14:42,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 804. [2021-08-21 18:14:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 1.7073474470734744) internal successors, (1371), 803 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1371 transitions. [2021-08-21 18:14:42,045 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1371 transitions. Word has length 39 [2021-08-21 18:14:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:42,045 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 1371 transitions. [2021-08-21 18:14:42,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2021-08-21 18:14:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1371 transitions. [2021-08-21 18:14:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:14:42,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:42,047 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:42,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 18:14:42,262 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,SelfDestructingSolverStorable66 [2021-08-21 18:14:42,262 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:14:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1939948632, now seen corresponding path program 62 times [2021-08-21 18:14:42,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:42,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76942967] [2021-08-21 18:14:42,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:42,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:42,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:42,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76942967] [2021-08-21 18:14:42,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76942967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:42,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873358712] [2021-08-21 18:14:42,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:14:42,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:42,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:42,672 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) [2021-08-21 18:14:42,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 18:14:46,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:14:46,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:46,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:14:46,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:47,885 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 18:14:47,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 18:14:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:47,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873358712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:47,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:47,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-08-21 18:14:47,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133219975] [2021-08-21 18:14:47,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:14:47,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:47,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:14:47,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:14:47,939 INFO L87 Difference]: Start difference. First operand 804 states and 1371 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) 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) [2021-08-21 18:14:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:48,501 INFO L93 Difference]: Finished difference Result 1470 states and 2446 transitions. [2021-08-21 18:14:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:14:48,502 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) 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 39 [2021-08-21 18:14:48,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:48,503 INFO L225 Difference]: With dead ends: 1470 [2021-08-21 18:14:48,503 INFO L226 Difference]: Without dead ends: 1321 [2021-08-21 18:14:48,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 853.6ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:14:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-08-21 18:14:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 884. [2021-08-21 18:14:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 1.6908267270668176) internal successors, (1493), 883 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:48,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1493 transitions. [2021-08-21 18:14:48,513 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1493 transitions. Word has length 39 [2021-08-21 18:14:48,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:48,513 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 1493 transitions. [2021-08-21 18:14:48,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) 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) [2021-08-21 18:14:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1493 transitions. [2021-08-21 18:14:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:14:48,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:48,515 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:48,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 18:14:48,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:48,719 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:14:48,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:48,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1435279448, now seen corresponding path program 63 times [2021-08-21 18:14:48,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:48,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611292146] [2021-08-21 18:14:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:48,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:49,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:49,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611292146] [2021-08-21 18:14:49,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611292146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:49,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435036833] [2021-08-21 18:14:49,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:14:49,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:49,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:49,189 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) [2021-08-21 18:14:49,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 18:14:53,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:14:53,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:53,073 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:14:53,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:54,512 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 18:14:54,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 18:14:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:54,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435036833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:54,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:54,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-08-21 18:14:54,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993787670] [2021-08-21 18:14:54,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:14:54,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:54,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:14:54,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:14:54,548 INFO L87 Difference]: Start difference. First operand 884 states and 1493 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-21 18:14:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:54,883 INFO L93 Difference]: Finished difference Result 1663 states and 2875 transitions. [2021-08-21 18:14:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:14:54,883 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:14:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:54,885 INFO L225 Difference]: With dead ends: 1663 [2021-08-21 18:14:54,885 INFO L226 Difference]: Without dead ends: 1600 [2021-08-21 18:14:54,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 694.8ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:14:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-08-21 18:14:54,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 913. [2021-08-21 18:14:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 1.6885964912280702) internal successors, (1540), 912 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:14:54,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1540 transitions. [2021-08-21 18:14:54,895 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1540 transitions. Word has length 39 [2021-08-21 18:14:54,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:54,895 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1540 transitions. [2021-08-21 18:14:54,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-21 18:14:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1540 transitions. [2021-08-21 18:14:54,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:14:54,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:54,897 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:54,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 18:14:55,117 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,SelfDestructingSolverStorable68 [2021-08-21 18:14:55,117 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:14:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:55,117 INFO L82 PathProgramCache]: Analyzing trace with hash 828657448, now seen corresponding path program 64 times [2021-08-21 18:14:55,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:55,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970014777] [2021-08-21 18:14:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:55,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:55,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:55,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970014777] [2021-08-21 18:14:55,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970014777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:55,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405070846] [2021-08-21 18:14:55,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:14:55,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:55,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:55,600 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) [2021-08-21 18:14:55,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 18:14:59,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:14:59,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:59,508 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:14:59,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:00,929 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 18:15:00,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 18:15:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:00,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405070846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:00,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:00,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-08-21 18:15:00,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988790492] [2021-08-21 18:15:00,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:15:00,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:00,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:15:00,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:15:00,965 INFO L87 Difference]: Start difference. First operand 913 states and 1540 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) 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) [2021-08-21 18:15:01,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:01,368 INFO L93 Difference]: Finished difference Result 1597 states and 2677 transitions. [2021-08-21 18:15:01,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:15:01,368 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) 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 39 [2021-08-21 18:15:01,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:01,369 INFO L225 Difference]: With dead ends: 1597 [2021-08-21 18:15:01,369 INFO L226 Difference]: Without dead ends: 1474 [2021-08-21 18:15:01,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 790.5ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:15:01,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-08-21 18:15:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1021. [2021-08-21 18:15:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 1.684313725490196) internal successors, (1718), 1020 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1718 transitions. [2021-08-21 18:15:01,383 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1718 transitions. Word has length 39 [2021-08-21 18:15:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:01,383 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1718 transitions. [2021-08-21 18:15:01,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) 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) [2021-08-21 18:15:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1718 transitions. [2021-08-21 18:15:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:15:01,384 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:01,385 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:01,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:01,600 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,SelfDestructingSolverStorable69 [2021-08-21 18:15:01,601 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:01,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1953217832, now seen corresponding path program 65 times [2021-08-21 18:15:01,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:01,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466243978] [2021-08-21 18:15:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:01,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:02,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:02,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466243978] [2021-08-21 18:15:02,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466243978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:02,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653152914] [2021-08-21 18:15:02,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:15:02,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:02,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:02,093 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) [2021-08-21 18:15:02,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 18:15:06,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 18:15:06,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:06,153 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:15:06,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:07,595 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 18:15:07,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 18:15:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:07,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653152914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:07,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:07,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-08-21 18:15:07,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938404544] [2021-08-21 18:15:07,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:15:07,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:07,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:15:07,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:15:07,632 INFO L87 Difference]: Start difference. First operand 1021 states and 1718 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-21 18:15:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:08,056 INFO L93 Difference]: Finished difference Result 2082 states and 3566 transitions. [2021-08-21 18:15:08,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:15:08,056 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:15:08,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:08,058 INFO L225 Difference]: With dead ends: 2082 [2021-08-21 18:15:08,058 INFO L226 Difference]: Without dead ends: 2055 [2021-08-21 18:15:08,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 713.0ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:15:08,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-08-21 18:15:08,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 994. [2021-08-21 18:15:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 1.6807653575025177) internal successors, (1669), 993 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1669 transitions. [2021-08-21 18:15:08,069 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1669 transitions. Word has length 39 [2021-08-21 18:15:08,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:08,070 INFO L470 AbstractCegarLoop]: Abstraction has 994 states and 1669 transitions. [2021-08-21 18:15:08,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-21 18:15:08,070 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1669 transitions. [2021-08-21 18:15:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:15:08,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:08,071 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:08,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 18:15:08,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:08,271 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:08,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:08,272 INFO L82 PathProgramCache]: Analyzing trace with hash 323988264, now seen corresponding path program 66 times [2021-08-21 18:15:08,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:08,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363343867] [2021-08-21 18:15:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:08,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:08,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:08,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363343867] [2021-08-21 18:15:08,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363343867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:08,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951724041] [2021-08-21 18:15:08,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:15:08,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:08,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:08,803 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) [2021-08-21 18:15:08,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 18:15:13,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 18:15:13,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:13,014 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-21 18:15:13,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:14,451 INFO L354 Elim1Store]: treesize reduction 894, result has 2.1 percent of original size [2021-08-21 18:15:14,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 138 treesize of output 76 [2021-08-21 18:15:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:14,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951724041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:14,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:14,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-08-21 18:15:14,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295337397] [2021-08-21 18:15:14,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:15:14,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:14,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:15:14,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:15:14,507 INFO L87 Difference]: Start difference. First operand 994 states and 1669 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-21 18:15:14,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:14,731 INFO L93 Difference]: Finished difference Result 1789 states and 3055 transitions. [2021-08-21 18:15:14,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:15:14,731 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:15:14,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:14,733 INFO L225 Difference]: With dead ends: 1789 [2021-08-21 18:15:14,733 INFO L226 Difference]: Without dead ends: 1762 [2021-08-21 18:15:14,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 727.9ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:15:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2021-08-21 18:15:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1007. [2021-08-21 18:15:14,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 1.6819085487077534) internal successors, (1692), 1006 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:14,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1692 transitions. [2021-08-21 18:15:14,743 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1692 transitions. Word has length 39 [2021-08-21 18:15:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:14,744 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 1692 transitions. [2021-08-21 18:15:14,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-21 18:15:14,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1692 transitions. [2021-08-21 18:15:14,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:15:14,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:14,745 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:14,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:14,945 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,SelfDestructingSolverStorable71 [2021-08-21 18:15:14,945 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:14,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:14,946 INFO L82 PathProgramCache]: Analyzing trace with hash -16994664, now seen corresponding path program 67 times [2021-08-21 18:15:14,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:14,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524847026] [2021-08-21 18:15:14,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:14,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:15,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:15,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524847026] [2021-08-21 18:15:15,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524847026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:15,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751985894] [2021-08-21 18:15:15,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:15:15,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:15,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:15,441 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) [2021-08-21 18:15:15,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 18:15:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:19,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:15:19,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:21,197 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 18:15:21,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 18:15:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:21,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751985894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:21,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:21,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-08-21 18:15:21,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613510000] [2021-08-21 18:15:21,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:15:21,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:21,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:15:21,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:15:21,233 INFO L87 Difference]: Start difference. First operand 1007 states and 1692 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-21 18:15:21,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:21,657 INFO L93 Difference]: Finished difference Result 1470 states and 2498 transitions. [2021-08-21 18:15:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:15:21,658 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:15:21,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:21,659 INFO L225 Difference]: With dead ends: 1470 [2021-08-21 18:15:21,659 INFO L226 Difference]: Without dead ends: 1461 [2021-08-21 18:15:21,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 688.3ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:15:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-08-21 18:15:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1010. [2021-08-21 18:15:21,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 1.6818632309217048) internal successors, (1697), 1009 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1697 transitions. [2021-08-21 18:15:21,675 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1697 transitions. Word has length 39 [2021-08-21 18:15:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:21,675 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 1697 transitions. [2021-08-21 18:15:21,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-21 18:15:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1697 transitions. [2021-08-21 18:15:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:15:21,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:21,677 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:21,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:21,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:21,905 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:21,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2059249544, now seen corresponding path program 68 times [2021-08-21 18:15:21,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:21,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403114264] [2021-08-21 18:15:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:21,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:22,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:22,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403114264] [2021-08-21 18:15:22,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403114264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:22,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481139220] [2021-08-21 18:15:22,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:15:22,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:22,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:22,372 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) [2021-08-21 18:15:22,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 18:15:26,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:15:26,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:26,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:15:26,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:28,050 INFO L354 Elim1Store]: treesize reduction 733, result has 2.1 percent of original size [2021-08-21 18:15:28,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 132 treesize of output 69 [2021-08-21 18:15:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:28,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481139220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:28,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:28,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-08-21 18:15:28,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533273222] [2021-08-21 18:15:28,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:15:28,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:28,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:15:28,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:15:28,087 INFO L87 Difference]: Start difference. First operand 1010 states and 1697 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2021-08-21 18:15:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:28,452 INFO L93 Difference]: Finished difference Result 2367 states and 4071 transitions. [2021-08-21 18:15:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:15:28,452 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 39 [2021-08-21 18:15:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:28,454 INFO L225 Difference]: With dead ends: 2367 [2021-08-21 18:15:28,454 INFO L226 Difference]: Without dead ends: 2304 [2021-08-21 18:15:28,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 648.0ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:15:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-08-21 18:15:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 689. [2021-08-21 18:15:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 1.691860465116279) internal successors, (1164), 688 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1164 transitions. [2021-08-21 18:15:28,466 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1164 transitions. Word has length 39 [2021-08-21 18:15:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:28,466 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 1164 transitions. [2021-08-21 18:15:28,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2021-08-21 18:15:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1164 transitions. [2021-08-21 18:15:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:15:28,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:28,467 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:28,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-21 18:15:28,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:28,668 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:28,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:28,668 INFO L82 PathProgramCache]: Analyzing trace with hash 947958360, now seen corresponding path program 69 times [2021-08-21 18:15:28,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:28,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654821848] [2021-08-21 18:15:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:28,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:29,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:29,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654821848] [2021-08-21 18:15:29,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654821848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:29,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683577339] [2021-08-21 18:15:29,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:15:29,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:29,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:29,128 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) [2021-08-21 18:15:29,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 18:15:33,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:15:33,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:33,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:15:33,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:34,945 INFO L354 Elim1Store]: treesize reduction 733, result has 2.1 percent of original size [2021-08-21 18:15:34,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 132 treesize of output 69 [2021-08-21 18:15:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:34,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683577339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:34,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:34,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-08-21 18:15:34,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318740796] [2021-08-21 18:15:34,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:15:34,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:15:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:15:34,981 INFO L87 Difference]: Start difference. First operand 689 states and 1164 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2021-08-21 18:15:35,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:35,406 INFO L93 Difference]: Finished difference Result 1713 states and 2941 transitions. [2021-08-21 18:15:35,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:15:35,406 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 39 [2021-08-21 18:15:35,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:35,408 INFO L225 Difference]: With dead ends: 1713 [2021-08-21 18:15:35,408 INFO L226 Difference]: Without dead ends: 1686 [2021-08-21 18:15:35,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 654.3ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:15:35,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-08-21 18:15:35,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 666. [2021-08-21 18:15:35,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 1.6887218045112782) internal successors, (1123), 665 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1123 transitions. [2021-08-21 18:15:35,416 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1123 transitions. Word has length 39 [2021-08-21 18:15:35,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:35,416 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1123 transitions. [2021-08-21 18:15:35,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2021-08-21 18:15:35,416 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1123 transitions. [2021-08-21 18:15:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:15:35,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:35,417 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:35,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:35,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:35,617 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:35,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:35,617 INFO L82 PathProgramCache]: Analyzing trace with hash 606975432, now seen corresponding path program 70 times [2021-08-21 18:15:35,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:35,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637962513] [2021-08-21 18:15:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:35,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:36,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:36,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637962513] [2021-08-21 18:15:36,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637962513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:36,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320610309] [2021-08-21 18:15:36,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:15:36,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:36,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:36,137 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) [2021-08-21 18:15:36,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 18:15:40,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:15:40,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:40,765 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:15:40,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:42,109 INFO L354 Elim1Store]: treesize reduction 733, result has 2.1 percent of original size [2021-08-21 18:15:42,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 132 treesize of output 69 [2021-08-21 18:15:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:42,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320610309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:42,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:42,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-08-21 18:15:42,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860091862] [2021-08-21 18:15:42,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:15:42,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:42,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:15:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:15:42,146 INFO L87 Difference]: Start difference. First operand 666 states and 1123 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2021-08-21 18:15:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:42,645 INFO L93 Difference]: Finished difference Result 1515 states and 2607 transitions. [2021-08-21 18:15:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:15:42,646 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 39 [2021-08-21 18:15:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:42,647 INFO L225 Difference]: With dead ends: 1515 [2021-08-21 18:15:42,647 INFO L226 Difference]: Without dead ends: 1488 [2021-08-21 18:15:42,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 698.8ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:15:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-08-21 18:15:42,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 613. [2021-08-21 18:15:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 1.696078431372549) internal successors, (1038), 612 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1038 transitions. [2021-08-21 18:15:42,654 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1038 transitions. Word has length 39 [2021-08-21 18:15:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:42,654 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 1038 transitions. [2021-08-21 18:15:42,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2021-08-21 18:15:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1038 transitions. [2021-08-21 18:15:42,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:15:42,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:42,655 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:42,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-21 18:15:42,856 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,SelfDestructingSolverStorable75 [2021-08-21 18:15:42,857 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:42,857 INFO L82 PathProgramCache]: Analyzing trace with hash -160601880, now seen corresponding path program 71 times [2021-08-21 18:15:42,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:42,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719136626] [2021-08-21 18:15:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:42,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:43,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:43,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719136626] [2021-08-21 18:15:43,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719136626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:43,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229836583] [2021-08-21 18:15:43,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:15:43,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:43,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:43,263 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) [2021-08-21 18:15:43,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 18:15:48,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:15:48,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:48,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:15:48,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:49,385 INFO L354 Elim1Store]: treesize reduction 1019, result has 2.1 percent of original size [2021-08-21 18:15:49,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 98 treesize of output 67 [2021-08-21 18:15:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 5 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:49,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229836583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:49,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:49,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2021-08-21 18:15:49,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573611344] [2021-08-21 18:15:49,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:15:49,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:49,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:15:49,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:15:49,432 INFO L87 Difference]: Start difference. First operand 613 states and 1038 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:51,064 INFO L93 Difference]: Finished difference Result 1482 states and 2408 transitions. [2021-08-21 18:15:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 18:15:51,064 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:15:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:51,066 INFO L225 Difference]: With dead ends: 1482 [2021-08-21 18:15:51,066 INFO L226 Difference]: Without dead ends: 1275 [2021-08-21 18:15:51,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1620.8ms TimeCoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:15:51,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-08-21 18:15:51,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 698. [2021-08-21 18:15:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 1.6944045911047345) internal successors, (1181), 697 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1181 transitions. [2021-08-21 18:15:51,073 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1181 transitions. Word has length 39 [2021-08-21 18:15:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:51,073 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 1181 transitions. [2021-08-21 18:15:51,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1181 transitions. [2021-08-21 18:15:51,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:15:51,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:51,074 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:51,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-21 18:15:51,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:51,274 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:51,275 INFO L82 PathProgramCache]: Analyzing trace with hash -665271064, now seen corresponding path program 72 times [2021-08-21 18:15:51,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:51,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902902487] [2021-08-21 18:15:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:51,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:51,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:51,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902902487] [2021-08-21 18:15:51,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902902487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:51,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210681924] [2021-08-21 18:15:51,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:15:51,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:51,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:51,725 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) [2021-08-21 18:15:51,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 18:15:56,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:15:56,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:56,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:15:56,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:57,742 INFO L354 Elim1Store]: treesize reduction 608, result has 2.1 percent of original size [2021-08-21 18:15:57,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 132 treesize of output 66 [2021-08-21 18:15:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:57,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210681924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:57,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:57,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-08-21 18:15:57,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197433767] [2021-08-21 18:15:57,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:15:57,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:57,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:15:57,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:15:57,778 INFO L87 Difference]: Start difference. First operand 698 states and 1181 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:58,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:58,196 INFO L93 Difference]: Finished difference Result 1798 states and 3108 transitions. [2021-08-21 18:15:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:15:58,196 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:15:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:58,198 INFO L225 Difference]: With dead ends: 1798 [2021-08-21 18:15:58,198 INFO L226 Difference]: Without dead ends: 1735 [2021-08-21 18:15:58,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 631.8ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:15:58,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-08-21 18:15:58,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 751. [2021-08-21 18:15:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 1.6986666666666668) internal successors, (1274), 750 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:58,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1274 transitions. [2021-08-21 18:15:58,206 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1274 transitions. Word has length 39 [2021-08-21 18:15:58,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:58,206 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 1274 transitions. [2021-08-21 18:15:58,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1274 transitions. [2021-08-21 18:15:58,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:15:58,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:58,207 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:58,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-21 18:15:58,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:58,407 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:58,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:58,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1006253992, now seen corresponding path program 73 times [2021-08-21 18:15:58,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:58,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621070558] [2021-08-21 18:15:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:58,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:58,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:58,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621070558] [2021-08-21 18:15:58,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621070558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:58,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707997230] [2021-08-21 18:15:58,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:15:58,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:58,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:58,862 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) [2021-08-21 18:15:58,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 18:16:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:03,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:16:03,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:05,073 INFO L354 Elim1Store]: treesize reduction 608, result has 2.1 percent of original size [2021-08-21 18:16:05,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 132 treesize of output 66 [2021-08-21 18:16:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:05,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707997230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:05,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:05,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-08-21 18:16:05,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22110844] [2021-08-21 18:16:05,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:16:05,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:05,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:16:05,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:16:05,110 INFO L87 Difference]: Start difference. First operand 751 states and 1274 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:05,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:05,483 INFO L93 Difference]: Finished difference Result 1252 states and 2142 transitions. [2021-08-21 18:16:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:16:05,483 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:16:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:05,484 INFO L225 Difference]: With dead ends: 1252 [2021-08-21 18:16:05,484 INFO L226 Difference]: Without dead ends: 1243 [2021-08-21 18:16:05,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 636.8ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:16:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-08-21 18:16:05,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 754. [2021-08-21 18:16:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 1.698539176626826) internal successors, (1279), 753 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1279 transitions. [2021-08-21 18:16:05,491 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1279 transitions. Word has length 39 [2021-08-21 18:16:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:05,491 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1279 transitions. [2021-08-21 18:16:05,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1279 transitions. [2021-08-21 18:16:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:16:05,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:05,492 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:05,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 18:16:05,693 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,SelfDestructingSolverStorable78 [2021-08-21 18:16:05,693 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:05,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:05,693 INFO L82 PathProgramCache]: Analyzing trace with hash -946343032, now seen corresponding path program 74 times [2021-08-21 18:16:05,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:05,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809297626] [2021-08-21 18:16:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:05,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:06,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:06,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809297626] [2021-08-21 18:16:06,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809297626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:06,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605763280] [2021-08-21 18:16:06,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:16:06,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:06,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:06,233 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) [2021-08-21 18:16:06,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 18:16:11,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:16:11,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:11,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:16:11,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:12,355 INFO L354 Elim1Store]: treesize reduction 495, result has 2.0 percent of original size [2021-08-21 18:16:12,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 132 treesize of output 63 [2021-08-21 18:16:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:12,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605763280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:12,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:12,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-08-21 18:16:12,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899990738] [2021-08-21 18:16:12,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:16:12,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:12,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:16:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:16:12,391 INFO L87 Difference]: Start difference. First operand 754 states and 1279 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-08-21 18:16:12,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:12,771 INFO L93 Difference]: Finished difference Result 1645 states and 2818 transitions. [2021-08-21 18:16:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:16:12,771 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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 39 [2021-08-21 18:16:12,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:12,773 INFO L225 Difference]: With dead ends: 1645 [2021-08-21 18:16:12,773 INFO L226 Difference]: Without dead ends: 1627 [2021-08-21 18:16:12,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 623.4ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:16:12,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-08-21 18:16:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 776. [2021-08-21 18:16:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 1.7019354838709677) internal successors, (1319), 775 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:12,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1319 transitions. [2021-08-21 18:16:12,781 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1319 transitions. Word has length 39 [2021-08-21 18:16:12,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:12,781 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 1319 transitions. [2021-08-21 18:16:12,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-08-21 18:16:12,781 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1319 transitions. [2021-08-21 18:16:12,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:16:12,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:12,782 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:12,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 18:16:12,982 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,SelfDestructingSolverStorable79 [2021-08-21 18:16:12,982 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:12,982 INFO L82 PathProgramCache]: Analyzing trace with hash -838564184, now seen corresponding path program 75 times [2021-08-21 18:16:12,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:12,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482896400] [2021-08-21 18:16:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:12,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:13,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:13,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482896400] [2021-08-21 18:16:13,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482896400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:13,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256502194] [2021-08-21 18:16:13,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:16:13,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:13,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:13,417 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) [2021-08-21 18:16:13,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 18:16:18,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 18:16:18,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:18,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:16:18,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:19,593 INFO L354 Elim1Store]: treesize reduction 394, result has 1.7 percent of original size [2021-08-21 18:16:19,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 132 treesize of output 60 [2021-08-21 18:16:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:19,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256502194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:19,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:19,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-08-21 18:16:19,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181984925] [2021-08-21 18:16:19,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:16:19,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:19,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:16:19,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:16:19,631 INFO L87 Difference]: Start difference. First operand 776 states and 1319 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:20,310 INFO L93 Difference]: Finished difference Result 1378 states and 2276 transitions. [2021-08-21 18:16:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:16:20,310 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:16:20,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:20,312 INFO L225 Difference]: With dead ends: 1378 [2021-08-21 18:16:20,312 INFO L226 Difference]: Without dead ends: 1223 [2021-08-21 18:16:20,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 859.5ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:16:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-08-21 18:16:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 853. [2021-08-21 18:16:20,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.692488262910798) internal successors, (1442), 852 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1442 transitions. [2021-08-21 18:16:20,319 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1442 transitions. Word has length 39 [2021-08-21 18:16:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:20,319 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1442 transitions. [2021-08-21 18:16:20,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1442 transitions. [2021-08-21 18:16:20,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:16:20,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:20,320 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:20,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 18:16:20,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:20,521 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:20,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1364104024, now seen corresponding path program 76 times [2021-08-21 18:16:20,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:20,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512473508] [2021-08-21 18:16:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:20,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:21,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:21,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512473508] [2021-08-21 18:16:21,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512473508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:21,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506606530] [2021-08-21 18:16:21,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:16:21,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:21,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:21,041 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) [2021-08-21 18:16:21,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 18:16:26,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:16:26,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:26,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:16:26,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:27,311 INFO L354 Elim1Store]: treesize reduction 394, result has 1.7 percent of original size [2021-08-21 18:16:27,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 132 treesize of output 60 [2021-08-21 18:16:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:27,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506606530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:27,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:27,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-08-21 18:16:27,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872660888] [2021-08-21 18:16:27,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:16:27,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:27,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:16:27,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:16:27,347 INFO L87 Difference]: Start difference. First operand 853 states and 1442 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:28,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:28,108 INFO L93 Difference]: Finished difference Result 1445 states and 2385 transitions. [2021-08-21 18:16:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:16:28,109 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:16:28,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:28,110 INFO L225 Difference]: With dead ends: 1445 [2021-08-21 18:16:28,110 INFO L226 Difference]: Without dead ends: 1280 [2021-08-21 18:16:28,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 930.8ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:16:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-08-21 18:16:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 845. [2021-08-21 18:16:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 1.6990521327014219) internal successors, (1434), 844 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1434 transitions. [2021-08-21 18:16:28,117 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1434 transitions. Word has length 39 [2021-08-21 18:16:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:28,117 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1434 transitions. [2021-08-21 18:16:28,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1434 transitions. [2021-08-21 18:16:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:16:28,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:28,118 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:28,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-21 18:16:28,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:28,319 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:28,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:28,319 INFO L82 PathProgramCache]: Analyzing trace with hash 398250664, now seen corresponding path program 77 times [2021-08-21 18:16:28,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:28,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840652931] [2021-08-21 18:16:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:28,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:28,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:28,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840652931] [2021-08-21 18:16:28,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840652931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:28,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244964100] [2021-08-21 18:16:28,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:16:28,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:28,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:28,803 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) [2021-08-21 18:16:28,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 18:16:34,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:16:34,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:34,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:16:34,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:35,143 INFO L354 Elim1Store]: treesize reduction 394, result has 1.7 percent of original size [2021-08-21 18:16:35,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 132 treesize of output 60 [2021-08-21 18:16:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:35,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244964100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:35,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:35,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-08-21 18:16:35,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302530088] [2021-08-21 18:16:35,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:16:35,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:35,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:16:35,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:16:35,179 INFO L87 Difference]: Start difference. First operand 845 states and 1434 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:35,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:35,877 INFO L93 Difference]: Finished difference Result 1772 states and 2948 transitions. [2021-08-21 18:16:35,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:16:35,877 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:16:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:35,879 INFO L225 Difference]: With dead ends: 1772 [2021-08-21 18:16:35,879 INFO L226 Difference]: Without dead ends: 1607 [2021-08-21 18:16:35,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 900.4ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:16:35,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-08-21 18:16:35,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1121. [2021-08-21 18:16:35,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.6928571428571428) internal successors, (1896), 1120 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:35,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1896 transitions. [2021-08-21 18:16:35,890 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1896 transitions. Word has length 39 [2021-08-21 18:16:35,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:35,890 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1896 transitions. [2021-08-21 18:16:35,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:35,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1896 transitions. [2021-08-21 18:16:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:16:35,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:35,892 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:35,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 18:16:36,092 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,SelfDestructingSolverStorable82 [2021-08-21 18:16:36,092 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:36,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:36,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1982525928, now seen corresponding path program 78 times [2021-08-21 18:16:36,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:36,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310407081] [2021-08-21 18:16:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:36,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:36,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:36,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310407081] [2021-08-21 18:16:36,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310407081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:36,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481492277] [2021-08-21 18:16:36,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:16:36,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:36,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:36,559 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) [2021-08-21 18:16:36,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 18:16:41,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:16:41,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:41,873 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-21 18:16:41,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:42,996 INFO L354 Elim1Store]: treesize reduction 410, result has 1.7 percent of original size [2021-08-21 18:16:42,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 138 treesize of output 64 [2021-08-21 18:16:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:43,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481492277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:43,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:43,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-08-21 18:16:43,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851982385] [2021-08-21 18:16:43,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:16:43,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:43,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:16:43,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:16:43,032 INFO L87 Difference]: Start difference. First operand 1121 states and 1896 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:43,408 INFO L93 Difference]: Finished difference Result 2134 states and 3638 transitions. [2021-08-21 18:16:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:16:43,408 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:16:43,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:43,411 INFO L225 Difference]: With dead ends: 2134 [2021-08-21 18:16:43,411 INFO L226 Difference]: Without dead ends: 2107 [2021-08-21 18:16:43,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 603.7ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:16:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-08-21 18:16:43,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1075. [2021-08-21 18:16:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 1.685288640595903) internal successors, (1810), 1074 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1810 transitions. [2021-08-21 18:16:43,421 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1810 transitions. Word has length 39 [2021-08-21 18:16:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:43,422 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 1810 transitions. [2021-08-21 18:16:43,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1810 transitions. [2021-08-21 18:16:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:16:43,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:43,423 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:43,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 18:16:43,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:43,623 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:43,624 INFO L82 PathProgramCache]: Analyzing trace with hash -447401448, now seen corresponding path program 79 times [2021-08-21 18:16:43,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:43,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45759032] [2021-08-21 18:16:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:43,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:44,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:44,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45759032] [2021-08-21 18:16:44,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45759032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:44,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033490091] [2021-08-21 18:16:44,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:16:44,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:44,153 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) [2021-08-21 18:16:44,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 18:16:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:49,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:16:49,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:50,824 INFO L354 Elim1Store]: treesize reduction 394, result has 1.7 percent of original size [2021-08-21 18:16:50,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 132 treesize of output 60 [2021-08-21 18:16:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:50,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033490091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:50,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:50,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-08-21 18:16:50,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171983493] [2021-08-21 18:16:50,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:16:50,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:50,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:16:50,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:16:50,860 INFO L87 Difference]: Start difference. First operand 1075 states and 1810 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:51,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:51,215 INFO L93 Difference]: Finished difference Result 2099 states and 3617 transitions. [2021-08-21 18:16:51,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:16:51,215 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:16:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:51,217 INFO L225 Difference]: With dead ends: 2099 [2021-08-21 18:16:51,217 INFO L226 Difference]: Without dead ends: 2036 [2021-08-21 18:16:51,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:16:51,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-08-21 18:16:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1085. [2021-08-21 18:16:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 1.6863468634686347) internal successors, (1828), 1084 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1828 transitions. [2021-08-21 18:16:51,230 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1828 transitions. Word has length 39 [2021-08-21 18:16:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:51,230 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 1828 transitions. [2021-08-21 18:16:51,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1828 transitions. [2021-08-21 18:16:51,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:16:51,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:51,232 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:51,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 18:16:51,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:51,432 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:51,433 INFO L82 PathProgramCache]: Analyzing trace with hash 307962328, now seen corresponding path program 80 times [2021-08-21 18:16:51,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:51,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065738904] [2021-08-21 18:16:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:51,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:51,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:51,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065738904] [2021-08-21 18:16:51,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065738904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:51,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313040858] [2021-08-21 18:16:51,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:16:51,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:51,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:51,923 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) [2021-08-21 18:16:51,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 18:16:57,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:16:57,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:57,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:16:57,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:58,570 INFO L354 Elim1Store]: treesize reduction 306, result has 1.0 percent of original size [2021-08-21 18:16:58,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 57 [2021-08-21 18:16:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:58,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313040858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:58,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:58,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-08-21 18:16:58,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290755620] [2021-08-21 18:16:58,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:16:58,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:58,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:16:58,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:16:58,608 INFO L87 Difference]: Start difference. First operand 1085 states and 1828 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) [2021-08-21 18:16:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:59,406 INFO L93 Difference]: Finished difference Result 1680 states and 2782 transitions. [2021-08-21 18:16:59,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:16:59,406 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 39 [2021-08-21 18:16:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:59,408 INFO L225 Difference]: With dead ends: 1680 [2021-08-21 18:16:59,408 INFO L226 Difference]: Without dead ends: 1521 [2021-08-21 18:16:59,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 953.7ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:16:59,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-08-21 18:16:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1153. [2021-08-21 18:16:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.6909722222222223) internal successors, (1948), 1152 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1948 transitions. [2021-08-21 18:16:59,418 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1948 transitions. Word has length 39 [2021-08-21 18:16:59,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:59,418 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1948 transitions. [2021-08-21 18:16:59,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) [2021-08-21 18:16:59,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1948 transitions. [2021-08-21 18:16:59,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:16:59,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:59,419 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:59,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 18:16:59,620 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,SelfDestructingSolverStorable85 [2021-08-21 18:16:59,620 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:59,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:59,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2072814264, now seen corresponding path program 81 times [2021-08-21 18:16:59,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:59,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315817203] [2021-08-21 18:16:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:59,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:00,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:00,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315817203] [2021-08-21 18:17:00,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315817203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:00,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166947982] [2021-08-21 18:17:00,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:17:00,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:00,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:00,081 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) [2021-08-21 18:17:00,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 18:17:05,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:17:05,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:05,761 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:17:05,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:06,845 INFO L354 Elim1Store]: treesize reduction 306, result has 1.0 percent of original size [2021-08-21 18:17:06,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 57 [2021-08-21 18:17:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:06,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166947982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:06,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:06,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-08-21 18:17:06,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660417783] [2021-08-21 18:17:06,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:17:06,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:06,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:17:06,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:17:06,882 INFO L87 Difference]: Start difference. First operand 1153 states and 1948 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) [2021-08-21 18:17:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:07,201 INFO L93 Difference]: Finished difference Result 2043 states and 3501 transitions. [2021-08-21 18:17:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:17:07,201 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 39 [2021-08-21 18:17:07,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:07,204 INFO L225 Difference]: With dead ends: 2043 [2021-08-21 18:17:07,204 INFO L226 Difference]: Without dead ends: 2016 [2021-08-21 18:17:07,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 535.1ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:17:07,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-08-21 18:17:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1142. [2021-08-21 18:17:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 1.688869412795793) internal successors, (1927), 1141 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1927 transitions. [2021-08-21 18:17:07,220 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1927 transitions. Word has length 39 [2021-08-21 18:17:07,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:07,220 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 1927 transitions. [2021-08-21 18:17:07,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) [2021-08-21 18:17:07,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1927 transitions. [2021-08-21 18:17:07,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:17:07,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:07,222 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:07,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 18:17:07,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:07,447 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:07,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:07,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1571180728, now seen corresponding path program 82 times [2021-08-21 18:17:07,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:07,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740847244] [2021-08-21 18:17:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:07,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:07,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:07,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740847244] [2021-08-21 18:17:07,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740847244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:07,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653414329] [2021-08-21 18:17:07,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:17:07,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:07,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:07,912 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) [2021-08-21 18:17:07,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 18:17:13,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:17:13,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:13,771 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:17:13,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:14,879 INFO L354 Elim1Store]: treesize reduction 306, result has 1.0 percent of original size [2021-08-21 18:17:14,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 57 [2021-08-21 18:17:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:14,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653414329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:14,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:14,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 23 [2021-08-21 18:17:14,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480614151] [2021-08-21 18:17:14,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:17:14,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:14,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:17:14,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:17:14,916 INFO L87 Difference]: Start difference. First operand 1142 states and 1927 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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) [2021-08-21 18:17:15,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:15,228 INFO L93 Difference]: Finished difference Result 2421 states and 4147 transitions. [2021-08-21 18:17:15,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:17:15,228 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 39 [2021-08-21 18:17:15,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:15,231 INFO L225 Difference]: With dead ends: 2421 [2021-08-21 18:17:15,231 INFO L226 Difference]: Without dead ends: 2394 [2021-08-21 18:17:15,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 547.6ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:17:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2021-08-21 18:17:15,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 1148. [2021-08-21 18:17:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 1.6887532693984306) internal successors, (1937), 1147 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:15,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1937 transitions. [2021-08-21 18:17:15,244 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1937 transitions. Word has length 39 [2021-08-21 18:17:15,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:15,244 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 1937 transitions. [2021-08-21 18:17:15,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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) [2021-08-21 18:17:15,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1937 transitions. [2021-08-21 18:17:15,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:17:15,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:15,245 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:15,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-21 18:17:15,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:15,447 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:15,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:15,447 INFO L82 PathProgramCache]: Analyzing trace with hash -537689784, now seen corresponding path program 83 times [2021-08-21 18:17:15,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:15,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983435514] [2021-08-21 18:17:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:15,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:15,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:15,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983435514] [2021-08-21 18:17:15,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983435514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:15,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889408704] [2021-08-21 18:17:15,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:17:15,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:15,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:15,956 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) [2021-08-21 18:17:15,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 18:17:21,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:17:21,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:21,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:17:21,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:22,934 INFO L354 Elim1Store]: treesize reduction 306, result has 1.0 percent of original size [2021-08-21 18:17:22,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 57 [2021-08-21 18:17:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:23,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889408704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:23,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:23,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-08-21 18:17:23,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538042677] [2021-08-21 18:17:23,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:17:23,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:23,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:17:23,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:17:23,001 INFO L87 Difference]: Start difference. First operand 1148 states and 1937 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-08-21 18:17:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:23,367 INFO L93 Difference]: Finished difference Result 2131 states and 3639 transitions. [2021-08-21 18:17:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:17:23,367 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 39 [2021-08-21 18:17:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:23,369 INFO L225 Difference]: With dead ends: 2131 [2021-08-21 18:17:23,369 INFO L226 Difference]: Without dead ends: 2104 [2021-08-21 18:17:23,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 581.6ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:17:23,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-08-21 18:17:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1129. [2021-08-21 18:17:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1128 states have (on average 1.6879432624113475) internal successors, (1904), 1128 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1904 transitions. [2021-08-21 18:17:23,381 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1904 transitions. Word has length 39 [2021-08-21 18:17:23,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:23,381 INFO L470 AbstractCegarLoop]: Abstraction has 1129 states and 1904 transitions. [2021-08-21 18:17:23,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-08-21 18:17:23,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1904 transitions. [2021-08-21 18:17:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:17:23,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:23,383 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:23,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 18:17:23,583 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,SelfDestructingSolverStorable88 [2021-08-21 18:17:23,583 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:23,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:23,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1776741336, now seen corresponding path program 84 times [2021-08-21 18:17:23,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:23,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441345661] [2021-08-21 18:17:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:23,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:24,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:24,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441345661] [2021-08-21 18:17:24,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441345661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:24,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447971879] [2021-08-21 18:17:24,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:17:24,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:24,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:24,117 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) [2021-08-21 18:17:24,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 18:17:30,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:17:30,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:30,026 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-21 18:17:30,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:31,011 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-08-21 18:17:31,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 126 treesize of output 48 [2021-08-21 18:17:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:31,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447971879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:31,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:31,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2021-08-21 18:17:31,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902807700] [2021-08-21 18:17:31,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:17:31,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:17:31,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:17:31,046 INFO L87 Difference]: Start difference. First operand 1129 states and 1904 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:31,320 INFO L93 Difference]: Finished difference Result 1779 states and 3025 transitions. [2021-08-21 18:17:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:17:31,321 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:17:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:31,323 INFO L225 Difference]: With dead ends: 1779 [2021-08-21 18:17:31,323 INFO L226 Difference]: Without dead ends: 1770 [2021-08-21 18:17:31,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 529.9ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:17:31,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2021-08-21 18:17:31,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1135. [2021-08-21 18:17:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 1.687830687830688) internal successors, (1914), 1134 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1914 transitions. [2021-08-21 18:17:31,335 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1914 transitions. Word has length 39 [2021-08-21 18:17:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:31,335 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1914 transitions. [2021-08-21 18:17:31,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:31,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1914 transitions. [2021-08-21 18:17:31,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 18:17:31,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:31,337 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:31,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-21 18:17:31,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:31,537 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:31,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:31,538 INFO L82 PathProgramCache]: Analyzing trace with hash -796438755, now seen corresponding path program 85 times [2021-08-21 18:17:31,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:31,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234654313] [2021-08-21 18:17:31,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:31,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 49 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:31,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:31,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234654313] [2021-08-21 18:17:31,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234654313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:31,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7783921] [2021-08-21 18:17:31,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:17:31,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:31,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:31,657 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) [2021-08-21 18:17:31,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 18:17:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:37,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:17:37,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 49 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:37,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7783921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:37,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:37,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 18:17:37,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462782561] [2021-08-21 18:17:37,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:17:37,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:37,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:17:37,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:17:37,854 INFO L87 Difference]: Start difference. First operand 1135 states and 1914 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:37,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:37,893 INFO L93 Difference]: Finished difference Result 1411 states and 2348 transitions. [2021-08-21 18:17:37,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:17:37,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 18:17:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:37,895 INFO L225 Difference]: With dead ends: 1411 [2021-08-21 18:17:37,895 INFO L226 Difference]: Without dead ends: 1411 [2021-08-21 18:17:37,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:17:37,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-08-21 18:17:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1177. [2021-08-21 18:17:37,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 1.6904761904761905) internal successors, (1988), 1176 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1988 transitions. [2021-08-21 18:17:37,905 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1988 transitions. Word has length 40 [2021-08-21 18:17:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:37,905 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 1988 transitions. [2021-08-21 18:17:37,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1988 transitions. [2021-08-21 18:17:37,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 18:17:37,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:37,906 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:37,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 18:17:38,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:38,107 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:38,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:38,107 INFO L82 PathProgramCache]: Analyzing trace with hash -867349419, now seen corresponding path program 86 times [2021-08-21 18:17:38,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:38,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885335612] [2021-08-21 18:17:38,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:38,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:38,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:38,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885335612] [2021-08-21 18:17:38,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885335612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:38,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070218267] [2021-08-21 18:17:38,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:17:38,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:38,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:38,523 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) [2021-08-21 18:17:38,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 18:17:44,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:17:44,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:44,577 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 18:17:44,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:45,866 INFO L354 Elim1Store]: treesize reduction 394, result has 1.7 percent of original size [2021-08-21 18:17:45,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 132 treesize of output 60 [2021-08-21 18:17:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:45,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070218267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:45,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:45,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 24 [2021-08-21 18:17:45,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295276912] [2021-08-21 18:17:45,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:17:45,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:45,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:17:45,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:17:45,903 INFO L87 Difference]: Start difference. First operand 1177 states and 1988 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:47,378 INFO L93 Difference]: Finished difference Result 2535 states and 4370 transitions. [2021-08-21 18:17:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:17:47,379 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 18:17:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:47,381 INFO L225 Difference]: With dead ends: 2535 [2021-08-21 18:17:47,381 INFO L226 Difference]: Without dead ends: 2463 [2021-08-21 18:17:47,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1524.3ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:17:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-08-21 18:17:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1186. [2021-08-21 18:17:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 1.6936708860759493) internal successors, (2007), 1185 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:47,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 2007 transitions. [2021-08-21 18:17:47,393 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 2007 transitions. Word has length 42 [2021-08-21 18:17:47,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:47,393 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 2007 transitions. [2021-08-21 18:17:47,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:47,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 2007 transitions. [2021-08-21 18:17:47,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:17:47,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:47,394 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:47,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 18:17:47,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:47,595 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:47,595 INFO L82 PathProgramCache]: Analyzing trace with hash -769046976, now seen corresponding path program 87 times [2021-08-21 18:17:47,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:47,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787343495] [2021-08-21 18:17:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:47,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:48,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:48,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787343495] [2021-08-21 18:17:48,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787343495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:48,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306803557] [2021-08-21 18:17:48,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:17:48,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:48,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:48,080 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) [2021-08-21 18:17:48,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 18:17:54,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:17:54,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:54,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:17:54,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:56,122 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 18:17:56,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 18:17:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:56,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306803557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:56,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:56,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-08-21 18:17:56,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600702066] [2021-08-21 18:17:56,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:17:56,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:56,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:17:56,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:17:56,160 INFO L87 Difference]: Start difference. First operand 1186 states and 2007 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:56,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:56,716 INFO L93 Difference]: Finished difference Result 3149 states and 5457 transitions. [2021-08-21 18:17:56,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:17:56,716 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:17:56,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:56,718 INFO L225 Difference]: With dead ends: 3149 [2021-08-21 18:17:56,718 INFO L226 Difference]: Without dead ends: 3068 [2021-08-21 18:17:56,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 814.5ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:17:56,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3068 states. [2021-08-21 18:17:56,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3068 to 1357. [2021-08-21 18:17:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 1.6887905604719764) internal successors, (2290), 1356 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2290 transitions. [2021-08-21 18:17:56,733 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2290 transitions. Word has length 43 [2021-08-21 18:17:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:56,733 INFO L470 AbstractCegarLoop]: Abstraction has 1357 states and 2290 transitions. [2021-08-21 18:17:56,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2290 transitions. [2021-08-21 18:17:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:17:56,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:56,735 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:56,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 18:17:56,935 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,SelfDestructingSolverStorable92 [2021-08-21 18:17:56,935 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:56,935 INFO L82 PathProgramCache]: Analyzing trace with hash 690924912, now seen corresponding path program 88 times [2021-08-21 18:17:56,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:56,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697983438] [2021-08-21 18:17:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:56,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:57,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:57,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697983438] [2021-08-21 18:17:57,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697983438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:57,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770037719] [2021-08-21 18:17:57,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:17:57,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:57,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:57,481 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) [2021-08-21 18:17:57,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 18:18:03,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:18:03,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:03,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:18:03,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:05,639 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 18:18:05,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 18:18:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:05,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770037719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:05,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:05,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-08-21 18:18:05,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254014563] [2021-08-21 18:18:05,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:18:05,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:05,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:18:05,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:18:05,676 INFO L87 Difference]: Start difference. First operand 1357 states and 2290 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:06,331 INFO L93 Difference]: Finished difference Result 2881 states and 4939 transitions. [2021-08-21 18:18:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:18:06,331 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:18:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:06,334 INFO L225 Difference]: With dead ends: 2881 [2021-08-21 18:18:06,334 INFO L226 Difference]: Without dead ends: 2872 [2021-08-21 18:18:06,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 844.9ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:18:06,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2021-08-21 18:18:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 1394. [2021-08-21 18:18:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 1.6905958363244795) internal successors, (2355), 1393 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 2355 transitions. [2021-08-21 18:18:06,348 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 2355 transitions. Word has length 43 [2021-08-21 18:18:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:06,348 INFO L470 AbstractCegarLoop]: Abstraction has 1394 states and 2355 transitions. [2021-08-21 18:18:06,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:06,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 2355 transitions. [2021-08-21 18:18:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:18:06,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:06,350 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:06,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 18:18:06,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:06,550 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:18:06,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:06,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1626934544, now seen corresponding path program 89 times [2021-08-21 18:18:06,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:06,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539782150] [2021-08-21 18:18:06,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:06,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:07,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:07,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539782150] [2021-08-21 18:18:07,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539782150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:07,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668854308] [2021-08-21 18:18:07,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:18:07,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:07,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:07,061 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) [2021-08-21 18:18:07,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 18:18:13,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:18:13,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:13,449 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:18:13,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:15,396 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 18:18:15,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 18:18:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:15,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668854308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:15,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:15,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-08-21 18:18:15,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717205514] [2021-08-21 18:18:15,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 18:18:15,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:15,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 18:18:15,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:18:15,434 INFO L87 Difference]: Start difference. First operand 1394 states and 2355 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:15,922 INFO L93 Difference]: Finished difference Result 3181 states and 5491 transitions. [2021-08-21 18:18:15,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:18:15,922 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:18:15,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:15,925 INFO L225 Difference]: With dead ends: 3181 [2021-08-21 18:18:15,925 INFO L226 Difference]: Without dead ends: 3100 [2021-08-21 18:18:15,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 856.5ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:18:15,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-08-21 18:18:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1235. [2021-08-21 18:18:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1234 states have (on average 1.6855753646677472) internal successors, (2080), 1234 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 2080 transitions. [2021-08-21 18:18:15,945 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 2080 transitions. Word has length 43 [2021-08-21 18:18:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:15,945 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 2080 transitions. [2021-08-21 18:18:15,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 2080 transitions. [2021-08-21 18:18:15,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:18:15,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:15,947 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:15,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 18:18:16,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:16,169 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:18:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:16,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1208060864, now seen corresponding path program 90 times [2021-08-21 18:18:16,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:16,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320227706] [2021-08-21 18:18:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:16,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:16,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:16,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320227706] [2021-08-21 18:18:16,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320227706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:16,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032090064] [2021-08-21 18:18:16,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:18:16,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:16,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:16,825 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) [2021-08-21 18:18:16,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 18:18:23,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:18:23,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:23,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:18:23,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:25,140 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 18:18:25,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 18:18:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:25,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032090064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:25,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:25,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-08-21 18:18:25,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441567987] [2021-08-21 18:18:25,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 18:18:25,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:25,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 18:18:25,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:18:25,177 INFO L87 Difference]: Start difference. First operand 1235 states and 2080 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:25,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:25,962 INFO L93 Difference]: Finished difference Result 2640 states and 4510 transitions. [2021-08-21 18:18:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:18:25,963 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:18:25,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:25,966 INFO L225 Difference]: With dead ends: 2640 [2021-08-21 18:18:25,966 INFO L226 Difference]: Without dead ends: 2631 [2021-08-21 18:18:25,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 903.7ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:18:25,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-08-21 18:18:25,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1184. [2021-08-21 18:18:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.6897717666948435) internal successors, (1999), 1183 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1999 transitions. [2021-08-21 18:18:25,979 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1999 transitions. Word has length 43 [2021-08-21 18:18:25,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:25,979 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 1999 transitions. [2021-08-21 18:18:25,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:25,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1999 transitions. [2021-08-21 18:18:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:18:25,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:25,980 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:26,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-21 18:18:26,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:26,181 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:18:26,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:26,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2121143376, now seen corresponding path program 91 times [2021-08-21 18:18:26,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:26,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509166995] [2021-08-21 18:18:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:26,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:26,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:26,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509166995] [2021-08-21 18:18:26,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509166995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:26,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478166600] [2021-08-21 18:18:26,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:18:26,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:26,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:26,705 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) [2021-08-21 18:18:26,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 18:18:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:33,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:18:33,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:35,236 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 18:18:35,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 18:18:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:35,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478166600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:35,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:35,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-08-21 18:18:35,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142582089] [2021-08-21 18:18:35,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 18:18:35,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:35,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 18:18:35,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:18:35,272 INFO L87 Difference]: Start difference. First operand 1184 states and 1999 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:35,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:35,694 INFO L93 Difference]: Finished difference Result 2442 states and 4149 transitions. [2021-08-21 18:18:35,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:18:35,695 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:18:35,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:35,697 INFO L225 Difference]: With dead ends: 2442 [2021-08-21 18:18:35,697 INFO L226 Difference]: Without dead ends: 2424 [2021-08-21 18:18:35,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 864.0ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:18:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2021-08-21 18:18:35,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 1264. [2021-08-21 18:18:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 1.6809184481393507) internal successors, (2123), 1263 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 2123 transitions. [2021-08-21 18:18:35,709 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 2123 transitions. Word has length 43 [2021-08-21 18:18:35,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:35,709 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 2123 transitions. [2021-08-21 18:18:35,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 2123 transitions. [2021-08-21 18:18:35,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:18:35,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:35,711 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:35,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 18:18:35,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:35,911 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:18:35,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:35,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1116775600, now seen corresponding path program 92 times [2021-08-21 18:18:35,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:35,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805379396] [2021-08-21 18:18:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:35,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:18:36,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:36,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805379396] [2021-08-21 18:18:36,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805379396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:36,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803376211] [2021-08-21 18:18:36,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:18:36,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:36,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:36,373 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) [2021-08-21 18:18:36,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 18:18:43,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:18:43,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:43,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:18:43,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:45,020 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 18:18:45,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 18:18:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:45,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803376211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:45,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:45,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 29 [2021-08-21 18:18:45,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090283] [2021-08-21 18:18:45,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:18:45,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:45,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:18:45,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:18:45,056 INFO L87 Difference]: Start difference. First operand 1264 states and 2123 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2021-08-21 18:18:45,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:45,684 INFO L93 Difference]: Finished difference Result 2110 states and 3510 transitions. [2021-08-21 18:18:45,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:18:45,684 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 43 [2021-08-21 18:18:45,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:45,687 INFO L225 Difference]: With dead ends: 2110 [2021-08-21 18:18:45,687 INFO L226 Difference]: Without dead ends: 1945 [2021-08-21 18:18:45,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1058.8ms TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:18:45,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-08-21 18:18:45,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1429. [2021-08-21 18:18:45,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 1.6834733893557423) internal successors, (2404), 1428 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 2404 transitions. [2021-08-21 18:18:45,706 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 2404 transitions. Word has length 43 [2021-08-21 18:18:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:45,707 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 2404 transitions. [2021-08-21 18:18:45,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2021-08-21 18:18:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 2404 transitions. [2021-08-21 18:18:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:18:45,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:45,709 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:45,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 18:18:45,935 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,SelfDestructingSolverStorable97 [2021-08-21 18:18:45,935 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:18:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:45,935 INFO L82 PathProgramCache]: Analyzing trace with hash 807918208, now seen corresponding path program 93 times [2021-08-21 18:18:45,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:45,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533189102] [2021-08-21 18:18:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:45,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:46,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:46,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533189102] [2021-08-21 18:18:46,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533189102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:46,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032435999] [2021-08-21 18:18:46,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:18:46,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:46,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:46,388 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) [2021-08-21 18:18:46,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 18:18:53,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 18:18:53,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:53,262 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:18:53,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:55,157 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 18:18:55,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 18:18:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:55,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032435999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:55,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:55,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-08-21 18:18:55,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749118118] [2021-08-21 18:18:55,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:18:55,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:55,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:18:55,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:18:55,195 INFO L87 Difference]: Start difference. First operand 1429 states and 2404 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:55,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:55,588 INFO L93 Difference]: Finished difference Result 2523 states and 4287 transitions. [2021-08-21 18:18:55,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:18:55,588 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:18:55,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:55,591 INFO L225 Difference]: With dead ends: 2523 [2021-08-21 18:18:55,591 INFO L226 Difference]: Without dead ends: 2496 [2021-08-21 18:18:55,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 798.8ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:18:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-08-21 18:18:55,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 1408. [2021-08-21 18:18:55,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 1.6808813077469793) internal successors, (2365), 1407 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2365 transitions. [2021-08-21 18:18:55,606 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2365 transitions. Word has length 43 [2021-08-21 18:18:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:55,607 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 2365 transitions. [2021-08-21 18:18:55,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2365 transitions. [2021-08-21 18:18:55,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:18:55,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:55,609 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:55,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 18:18:55,809 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,SelfDestructingSolverStorable98 [2021-08-21 18:18:55,809 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:18:55,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:55,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1043533440, now seen corresponding path program 94 times [2021-08-21 18:18:55,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:55,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817438366] [2021-08-21 18:18:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:55,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:56,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:56,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817438366] [2021-08-21 18:18:56,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817438366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:56,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885653488] [2021-08-21 18:18:56,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:18:56,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:56,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:56,402 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) [2021-08-21 18:18:56,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 18:19:03,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:19:03,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:03,315 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:19:03,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:05,223 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 18:19:05,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 18:19:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:05,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885653488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:05,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:05,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-08-21 18:19:05,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490188092] [2021-08-21 18:19:05,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 18:19:05,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:05,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 18:19:05,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:19:05,259 INFO L87 Difference]: Start difference. First operand 1408 states and 2365 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:05,712 INFO L93 Difference]: Finished difference Result 2818 states and 4842 transitions. [2021-08-21 18:19:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:19:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:19:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:05,715 INFO L225 Difference]: With dead ends: 2818 [2021-08-21 18:19:05,715 INFO L226 Difference]: Without dead ends: 2755 [2021-08-21 18:19:05,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 857.1ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:19:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-08-21 18:19:05,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1418. [2021-08-21 18:19:05,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 1.6817219477769936) internal successors, (2383), 1417 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:05,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 2383 transitions. [2021-08-21 18:19:05,737 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 2383 transitions. Word has length 43 [2021-08-21 18:19:05,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:05,737 INFO L470 AbstractCegarLoop]: Abstraction has 1418 states and 2383 transitions. [2021-08-21 18:19:05,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:05,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 2383 transitions. [2021-08-21 18:19:05,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:19:05,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:05,738 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:05,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-21 18:19:05,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-21 18:19:05,939 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:05,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:05,939 INFO L82 PathProgramCache]: Analyzing trace with hash 990717632, now seen corresponding path program 95 times [2021-08-21 18:19:05,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:05,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975606460] [2021-08-21 18:19:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:05,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:19:06,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:06,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975606460] [2021-08-21 18:19:06,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975606460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:06,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615082018] [2021-08-21 18:19:06,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:19:06,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:06,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:06,496 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) [2021-08-21 18:19:06,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 18:19:13,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:19:13,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:13,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-21 18:19:13,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:16,592 INFO L354 Elim1Store]: treesize reduction 1127, result has 1.9 percent of original size [2021-08-21 18:19:16,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 157 treesize of output 96 [2021-08-21 18:19:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:16,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615082018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:16,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:16,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 30 [2021-08-21 18:19:16,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054142463] [2021-08-21 18:19:16,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:19:16,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:16,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:19:16,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:19:16,632 INFO L87 Difference]: Start difference. First operand 1418 states and 2383 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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) [2021-08-21 18:19:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:23,156 INFO L93 Difference]: Finished difference Result 2161 states and 3575 transitions. [2021-08-21 18:19:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:19:23,156 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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 43 [2021-08-21 18:19:23,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:23,158 INFO L225 Difference]: With dead ends: 2161 [2021-08-21 18:19:23,158 INFO L226 Difference]: Without dead ends: 1960 [2021-08-21 18:19:23,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 5173.7ms TimeCoverageRelationStatistics Valid=271, Invalid=2809, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:19:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-08-21 18:19:23,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1525. [2021-08-21 18:19:23,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 1.6837270341207349) internal successors, (2566), 1524 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:23,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2566 transitions. [2021-08-21 18:19:23,173 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2566 transitions. Word has length 43 [2021-08-21 18:19:23,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:23,174 INFO L470 AbstractCegarLoop]: Abstraction has 1525 states and 2566 transitions. [2021-08-21 18:19:23,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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) [2021-08-21 18:19:23,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2566 transitions. [2021-08-21 18:19:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:19:23,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:23,175 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:23,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 18:19:23,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:23,375 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:23,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1379555856, now seen corresponding path program 96 times [2021-08-21 18:19:23,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:23,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145824502] [2021-08-21 18:19:23,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:23,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:23,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:23,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145824502] [2021-08-21 18:19:23,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145824502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:23,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341264027] [2021-08-21 18:19:23,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:19:23,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:23,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:23,911 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) [2021-08-21 18:19:23,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 18:19:31,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:19:31,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:31,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:19:31,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:33,078 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 18:19:33,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 18:19:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:33,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341264027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:33,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:33,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-08-21 18:19:33,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801313100] [2021-08-21 18:19:33,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:19:33,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:33,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:19:33,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:19:33,115 INFO L87 Difference]: Start difference. First operand 1525 states and 2566 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:33,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:33,581 INFO L93 Difference]: Finished difference Result 2571 states and 4383 transitions. [2021-08-21 18:19:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:19:33,581 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:19:33,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:33,584 INFO L225 Difference]: With dead ends: 2571 [2021-08-21 18:19:33,584 INFO L226 Difference]: Without dead ends: 2544 [2021-08-21 18:19:33,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 885.3ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:19:33,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-08-21 18:19:33,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1515. [2021-08-21 18:19:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 1.6816380449141348) internal successors, (2546), 1514 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) [2021-08-21 18:19:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 2546 transitions. [2021-08-21 18:19:33,598 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 2546 transitions. Word has length 43 [2021-08-21 18:19:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:33,598 INFO L470 AbstractCegarLoop]: Abstraction has 1515 states and 2546 transitions. [2021-08-21 18:19:33,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 2546 transitions. [2021-08-21 18:19:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:19:33,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:33,599 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:33,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 18:19:33,799 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,SelfDestructingSolverStorable101 [2021-08-21 18:19:33,800 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:33,800 INFO L82 PathProgramCache]: Analyzing trace with hash 951222256, now seen corresponding path program 97 times [2021-08-21 18:19:33,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:33,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444396674] [2021-08-21 18:19:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:33,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:34,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:34,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444396674] [2021-08-21 18:19:34,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444396674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:34,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018872716] [2021-08-21 18:19:34,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:19:34,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:34,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:34,333 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) [2021-08-21 18:19:34,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 18:19:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:41,668 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:19:41,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:43,587 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 18:19:43,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 18:19:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:43,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018872716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:43,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:43,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-08-21 18:19:43,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86005127] [2021-08-21 18:19:43,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:19:43,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:43,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:19:43,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:19:43,624 INFO L87 Difference]: Start difference. First operand 1515 states and 2546 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:44,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:44,058 INFO L93 Difference]: Finished difference Result 3060 states and 5220 transitions. [2021-08-21 18:19:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:19:44,058 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:19:44,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:44,061 INFO L225 Difference]: With dead ends: 3060 [2021-08-21 18:19:44,061 INFO L226 Difference]: Without dead ends: 3033 [2021-08-21 18:19:44,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 858.1ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:19:44,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2021-08-21 18:19:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 1488. [2021-08-21 18:19:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 1.679219905850706) internal successors, (2497), 1487 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 2497 transitions. [2021-08-21 18:19:44,076 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 2497 transitions. Word has length 43 [2021-08-21 18:19:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:44,076 INFO L470 AbstractCegarLoop]: Abstraction has 1488 states and 2497 transitions. [2021-08-21 18:19:44,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 2497 transitions. [2021-08-21 18:19:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:19:44,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:44,077 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:44,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 18:19:44,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:44,278 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:44,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:44,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1143940624, now seen corresponding path program 98 times [2021-08-21 18:19:44,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:44,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6574810] [2021-08-21 18:19:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:44,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:44,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:44,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6574810] [2021-08-21 18:19:44,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6574810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:44,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201937329] [2021-08-21 18:19:44,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:19:44,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:44,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:44,876 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) [2021-08-21 18:19:44,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 18:19:52,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:19:52,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:52,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:19:52,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:54,254 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 18:19:54,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 18:19:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:54,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201937329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:54,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:54,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-08-21 18:19:54,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800910730] [2021-08-21 18:19:54,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 18:19:54,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:54,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 18:19:54,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:19:54,292 INFO L87 Difference]: Start difference. First operand 1488 states and 2497 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:54,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:54,869 INFO L93 Difference]: Finished difference Result 2914 states and 4974 transitions. [2021-08-21 18:19:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:19:54,869 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:19:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:54,872 INFO L225 Difference]: With dead ends: 2914 [2021-08-21 18:19:54,872 INFO L226 Difference]: Without dead ends: 2887 [2021-08-21 18:19:54,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 892.6ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:19:54,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-08-21 18:19:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1488. [2021-08-21 18:19:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 1.679219905850706) internal successors, (2497), 1487 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:54,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 2497 transitions. [2021-08-21 18:19:54,887 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 2497 transitions. Word has length 43 [2021-08-21 18:19:54,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:54,887 INFO L470 AbstractCegarLoop]: Abstraction has 1488 states and 2497 transitions. [2021-08-21 18:19:54,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:54,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 2497 transitions. [2021-08-21 18:19:54,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:19:54,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:54,888 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:54,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 18:19:55,088 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,SelfDestructingSolverStorable103 [2021-08-21 18:19:55,089 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:55,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:55,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1165514944, now seen corresponding path program 99 times [2021-08-21 18:19:55,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:55,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341062126] [2021-08-21 18:19:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:55,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:55,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:55,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341062126] [2021-08-21 18:19:55,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341062126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:55,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562611377] [2021-08-21 18:19:55,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:19:55,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:55,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:55,775 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) [2021-08-21 18:19:55,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 18:20:03,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:20:03,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:03,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:20:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:05,275 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 18:20:05,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 18:20:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:05,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562611377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:05,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:05,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-08-21 18:20:05,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702014044] [2021-08-21 18:20:05,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 18:20:05,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:05,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 18:20:05,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:20:05,312 INFO L87 Difference]: Start difference. First operand 1488 states and 2497 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:05,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:05,934 INFO L93 Difference]: Finished difference Result 2505 states and 4261 transitions. [2021-08-21 18:20:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:20:05,935 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:20:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:05,937 INFO L225 Difference]: With dead ends: 2505 [2021-08-21 18:20:05,937 INFO L226 Difference]: Without dead ends: 2496 [2021-08-21 18:20:05,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 967.4ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:20:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-08-21 18:20:05,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 1491. [2021-08-21 18:20:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 1.6791946308724832) internal successors, (2502), 1490 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 2502 transitions. [2021-08-21 18:20:05,952 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 2502 transitions. Word has length 43 [2021-08-21 18:20:05,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:05,952 INFO L470 AbstractCegarLoop]: Abstraction has 1491 states and 2502 transitions. [2021-08-21 18:20:05,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:05,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 2502 transitions. [2021-08-21 18:20:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:20:05,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:05,953 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:05,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 18:20:06,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:06,154 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:06,154 INFO L82 PathProgramCache]: Analyzing trace with hash 193714912, now seen corresponding path program 100 times [2021-08-21 18:20:06,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:06,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283374548] [2021-08-21 18:20:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:06,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:06,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:06,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283374548] [2021-08-21 18:20:06,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283374548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:06,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389253957] [2021-08-21 18:20:06,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:20:06,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:06,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:06,691 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) [2021-08-21 18:20:06,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 18:20:14,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:20:14,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:14,354 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:20:14,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:16,196 INFO L354 Elim1Store]: treesize reduction 1022, result has 1.8 percent of original size [2021-08-21 18:20:16,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 151 treesize of output 79 [2021-08-21 18:20:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:16,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389253957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:16,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:16,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-08-21 18:20:16,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125928621] [2021-08-21 18:20:16,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:20:16,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:16,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:20:16,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:20:16,233 INFO L87 Difference]: Start difference. First operand 1491 states and 2502 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:16,884 INFO L93 Difference]: Finished difference Result 3144 states and 5326 transitions. [2021-08-21 18:20:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:20:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:20:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:16,887 INFO L225 Difference]: With dead ends: 3144 [2021-08-21 18:20:16,887 INFO L226 Difference]: Without dead ends: 3117 [2021-08-21 18:20:16,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 878.5ms TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:20:16,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-08-21 18:20:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 1725. [2021-08-21 18:20:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.6786542923433874) internal successors, (2894), 1724 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2894 transitions. [2021-08-21 18:20:16,905 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2894 transitions. Word has length 43 [2021-08-21 18:20:16,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:16,905 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 2894 transitions. [2021-08-21 18:20:16,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:16,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2894 transitions. [2021-08-21 18:20:16,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:20:16,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:16,908 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:16,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:17,114 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,SelfDestructingSolverStorable105 [2021-08-21 18:20:17,114 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:17,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1198082688, now seen corresponding path program 101 times [2021-08-21 18:20:17,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:17,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102026255] [2021-08-21 18:20:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:17,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:17,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:17,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102026255] [2021-08-21 18:20:17,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102026255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:17,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907667587] [2021-08-21 18:20:17,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:20:17,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:17,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:17,588 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) [2021-08-21 18:20:17,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 18:20:25,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:20:25,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:25,418 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:20:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:27,350 INFO L354 Elim1Store]: treesize reduction 996, result has 1.9 percent of original size [2021-08-21 18:20:27,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 158 treesize of output 88 [2021-08-21 18:20:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:27,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907667587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:27,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:27,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-08-21 18:20:27,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994541502] [2021-08-21 18:20:27,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:20:27,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:27,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:20:27,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:20:27,387 INFO L87 Difference]: Start difference. First operand 1725 states and 2894 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2021-08-21 18:20:29,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:29,185 INFO L93 Difference]: Finished difference Result 2808 states and 4668 transitions. [2021-08-21 18:20:29,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:20:29,185 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 43 [2021-08-21 18:20:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:29,188 INFO L225 Difference]: With dead ends: 2808 [2021-08-21 18:20:29,188 INFO L226 Difference]: Without dead ends: 2612 [2021-08-21 18:20:29,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1541.5ms TimeCoverageRelationStatistics Valid=151, Invalid=1409, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:20:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-08-21 18:20:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2070. [2021-08-21 18:20:29,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 1.6892218463025617) internal successors, (3495), 2069 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:29,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 3495 transitions. [2021-08-21 18:20:29,209 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 3495 transitions. Word has length 43 [2021-08-21 18:20:29,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:29,209 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 3495 transitions. [2021-08-21 18:20:29,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2021-08-21 18:20:29,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 3495 transitions. [2021-08-21 18:20:29,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:20:29,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:29,211 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:29,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 18:20:29,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:29,411 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:29,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:29,411 INFO L82 PathProgramCache]: Analyzing trace with hash -936575568, now seen corresponding path program 102 times [2021-08-21 18:20:29,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:29,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479876869] [2021-08-21 18:20:29,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:29,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:30,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:30,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479876869] [2021-08-21 18:20:30,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479876869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:30,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024818493] [2021-08-21 18:20:30,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:20:30,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:30,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:30,100 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) [2021-08-21 18:20:30,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 18:20:38,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:20:38,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:38,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 18:20:38,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:40,587 INFO L354 Elim1Store]: treesize reduction 996, result has 1.9 percent of original size [2021-08-21 18:20:40,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 161 treesize of output 93 [2021-08-21 18:20:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:40,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024818493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:40,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:40,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-08-21 18:20:40,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135460786] [2021-08-21 18:20:40,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:20:40,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:40,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:20:40,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:20:40,624 INFO L87 Difference]: Start difference. First operand 2070 states and 3495 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:45,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:45,336 INFO L93 Difference]: Finished difference Result 3418 states and 5792 transitions. [2021-08-21 18:20:45,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:20:45,336 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:20:45,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:45,340 INFO L225 Difference]: With dead ends: 3418 [2021-08-21 18:20:45,340 INFO L226 Difference]: Without dead ends: 3253 [2021-08-21 18:20:45,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 2919.2ms TimeCoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:20:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3253 states. [2021-08-21 18:20:45,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3253 to 2171. [2021-08-21 18:20:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 1.6903225806451614) internal successors, (3668), 2170 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 3668 transitions. [2021-08-21 18:20:45,363 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 3668 transitions. Word has length 43 [2021-08-21 18:20:45,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:45,363 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 3668 transitions. [2021-08-21 18:20:45,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:45,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 3668 transitions. [2021-08-21 18:20:45,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:20:45,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:45,365 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:45,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 18:20:45,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:45,566 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:45,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:45,566 INFO L82 PathProgramCache]: Analyzing trace with hash -989391376, now seen corresponding path program 103 times [2021-08-21 18:20:45,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:45,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621304765] [2021-08-21 18:20:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:45,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:46,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:46,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621304765] [2021-08-21 18:20:46,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621304765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:46,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674755183] [2021-08-21 18:20:46,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:20:46,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:46,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:46,096 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) [2021-08-21 18:20:46,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 18:20:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:54,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:20:54,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:56,052 INFO L354 Elim1Store]: treesize reduction 1022, result has 1.8 percent of original size [2021-08-21 18:20:56,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 151 treesize of output 79 [2021-08-21 18:20:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:56,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674755183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:56,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:56,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-08-21 18:20:56,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519085734] [2021-08-21 18:20:56,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:20:56,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:56,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:20:56,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:20:56,089 INFO L87 Difference]: Start difference. First operand 2171 states and 3668 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2021-08-21 18:20:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:57,376 INFO L93 Difference]: Finished difference Result 3233 states and 5381 transitions. [2021-08-21 18:20:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 18:20:57,376 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 43 [2021-08-21 18:20:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:57,379 INFO L225 Difference]: With dead ends: 3233 [2021-08-21 18:20:57,379 INFO L226 Difference]: Without dead ends: 3031 [2021-08-21 18:20:57,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1252.9ms TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:20:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-08-21 18:20:57,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 2490. [2021-08-21 18:20:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2489 states have (on average 1.6910405785456006) internal successors, (4209), 2489 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 4209 transitions. [2021-08-21 18:20:57,401 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 4209 transitions. Word has length 43 [2021-08-21 18:20:57,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:57,401 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 4209 transitions. [2021-08-21 18:20:57,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2021-08-21 18:20:57,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 4209 transitions. [2021-08-21 18:20:57,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:20:57,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:57,403 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:57,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:57,603 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,SelfDestructingSolverStorable108 [2021-08-21 18:20:57,603 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:57,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:57,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1028886752, now seen corresponding path program 104 times [2021-08-21 18:20:57,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:57,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724551612] [2021-08-21 18:20:57,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:57,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:58,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:58,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724551612] [2021-08-21 18:20:58,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724551612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:58,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806945752] [2021-08-21 18:20:58,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:20:58,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:58,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:58,274 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) [2021-08-21 18:20:58,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 18:21:06,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:21:06,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:06,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:21:06,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:08,284 INFO L354 Elim1Store]: treesize reduction 1022, result has 1.8 percent of original size [2021-08-21 18:21:08,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 151 treesize of output 79 [2021-08-21 18:21:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:08,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806945752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:08,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:08,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 31 [2021-08-21 18:21:08,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070073506] [2021-08-21 18:21:08,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:21:08,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:08,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:21:08,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:21:08,321 INFO L87 Difference]: Start difference. First operand 2490 states and 4209 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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) [2021-08-21 18:21:09,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:09,010 INFO L93 Difference]: Finished difference Result 4748 states and 8149 transitions. [2021-08-21 18:21:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:21:09,010 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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 43 [2021-08-21 18:21:09,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:09,015 INFO L225 Difference]: With dead ends: 4748 [2021-08-21 18:21:09,016 INFO L226 Difference]: Without dead ends: 4685 [2021-08-21 18:21:09,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 913.4ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:21:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4685 states. [2021-08-21 18:21:09,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4685 to 2547. [2021-08-21 18:21:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 1.6920659858601728) internal successors, (4308), 2546 states have internal predecessors, (4308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 4308 transitions. [2021-08-21 18:21:09,049 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 4308 transitions. Word has length 43 [2021-08-21 18:21:09,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:09,050 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 4308 transitions. [2021-08-21 18:21:09,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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) [2021-08-21 18:21:09,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 4308 transitions. [2021-08-21 18:21:09,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:21:09,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:09,052 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:09,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 18:21:09,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:09,253 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:21:09,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:09,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1170917664, now seen corresponding path program 105 times [2021-08-21 18:21:09,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:09,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751920306] [2021-08-21 18:21:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:09,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:09,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:09,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751920306] [2021-08-21 18:21:09,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751920306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:09,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585363851] [2021-08-21 18:21:09,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:21:09,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:09,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:09,959 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) [2021-08-21 18:21:09,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 18:21:18,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:21:18,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:18,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:21:18,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:20,019 INFO L354 Elim1Store]: treesize reduction 1022, result has 1.8 percent of original size [2021-08-21 18:21:20,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 151 treesize of output 79 [2021-08-21 18:21:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:20,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585363851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:20,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:20,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-08-21 18:21:20,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414508810] [2021-08-21 18:21:20,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:21:20,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:20,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:21:20,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:21:20,056 INFO L87 Difference]: Start difference. First operand 2547 states and 4308 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:20,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:20,511 INFO L93 Difference]: Finished difference Result 3925 states and 6703 transitions. [2021-08-21 18:21:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:21:20,511 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:21:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:20,516 INFO L225 Difference]: With dead ends: 3925 [2021-08-21 18:21:20,516 INFO L226 Difference]: Without dead ends: 3898 [2021-08-21 18:21:20,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 938.4ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:21:20,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-08-21 18:21:20,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 2560. [2021-08-21 18:21:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2559 states have (on average 1.6924579914028917) internal successors, (4331), 2559 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 4331 transitions. [2021-08-21 18:21:20,543 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 4331 transitions. Word has length 43 [2021-08-21 18:21:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:20,543 INFO L470 AbstractCegarLoop]: Abstraction has 2560 states and 4331 transitions. [2021-08-21 18:21:20,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 4331 transitions. [2021-08-21 18:21:20,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:21:20,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:20,546 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:20,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 18:21:20,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:20,746 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:21:20,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:20,746 INFO L82 PathProgramCache]: Analyzing trace with hash -814594064, now seen corresponding path program 106 times [2021-08-21 18:21:20,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:20,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840412997] [2021-08-21 18:21:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:20,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:21,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:21,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840412997] [2021-08-21 18:21:21,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840412997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:21,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639599080] [2021-08-21 18:21:21,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:21:21,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:21,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:21,489 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) [2021-08-21 18:21:21,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 18:21:29,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:21:29,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:29,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:21:29,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:31,677 INFO L354 Elim1Store]: treesize reduction 1022, result has 1.8 percent of original size [2021-08-21 18:21:31,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 151 treesize of output 79 [2021-08-21 18:21:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:31,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639599080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:31,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:31,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-08-21 18:21:31,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398183878] [2021-08-21 18:21:31,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:21:31,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:31,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:21:31,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:21:31,715 INFO L87 Difference]: Start difference. First operand 2560 states and 4331 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:32,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:32,223 INFO L93 Difference]: Finished difference Result 3514 states and 5988 transitions. [2021-08-21 18:21:32,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:21:32,224 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:21:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:32,227 INFO L225 Difference]: With dead ends: 3514 [2021-08-21 18:21:32,227 INFO L226 Difference]: Without dead ends: 3505 [2021-08-21 18:21:32,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1036.3ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:21:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3505 states. [2021-08-21 18:21:32,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3505 to 2560. [2021-08-21 18:21:32,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2559 states have (on average 1.6924579914028917) internal successors, (4331), 2559 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 4331 transitions. [2021-08-21 18:21:32,251 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 4331 transitions. Word has length 43 [2021-08-21 18:21:32,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:32,251 INFO L470 AbstractCegarLoop]: Abstraction has 2560 states and 4331 transitions. [2021-08-21 18:21:32,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 4331 transitions. [2021-08-21 18:21:32,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:21:32,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:32,254 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:32,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 18:21:32,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:32,454 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:21:32,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:32,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1046919104, now seen corresponding path program 107 times [2021-08-21 18:21:32,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:32,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075353762] [2021-08-21 18:21:32,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:32,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:33,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:33,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075353762] [2021-08-21 18:21:33,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075353762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:33,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485243258] [2021-08-21 18:21:33,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:21:33,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:33,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:33,095 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) [2021-08-21 18:21:33,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 18:21:41,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:21:41,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:41,530 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:21:41,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:43,241 INFO L354 Elim1Store]: treesize reduction 873, result has 1.8 percent of original size [2021-08-21 18:21:43,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 151 treesize of output 76 [2021-08-21 18:21:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:43,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485243258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:43,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:43,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-08-21 18:21:43,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801233821] [2021-08-21 18:21:43,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:21:43,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:43,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:21:43,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:21:43,277 INFO L87 Difference]: Start difference. First operand 2560 states and 4331 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:43,733 INFO L93 Difference]: Finished difference Result 4908 states and 8395 transitions. [2021-08-21 18:21:43,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:21:43,733 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:21:43,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:43,738 INFO L225 Difference]: With dead ends: 4908 [2021-08-21 18:21:43,738 INFO L226 Difference]: Without dead ends: 4809 [2021-08-21 18:21:43,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 918.7ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:21:43,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4809 states. [2021-08-21 18:21:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4809 to 2655. [2021-08-21 18:21:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 2654 states have (on average 1.696307460437076) internal successors, (4502), 2654 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:43,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 4502 transitions. [2021-08-21 18:21:43,766 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 4502 transitions. Word has length 43 [2021-08-21 18:21:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:43,766 INFO L470 AbstractCegarLoop]: Abstraction has 2655 states and 4502 transitions. [2021-08-21 18:21:43,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 4502 transitions. [2021-08-21 18:21:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:21:43,768 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:43,768 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:43,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 18:21:43,968 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,SelfDestructingSolverStorable112 [2021-08-21 18:21:43,969 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:21:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:43,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1060574128, now seen corresponding path program 108 times [2021-08-21 18:21:43,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:43,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259564336] [2021-08-21 18:21:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:43,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:44,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:44,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259564336] [2021-08-21 18:21:44,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259564336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:44,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78030055] [2021-08-21 18:21:44,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:21:44,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:44,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:44,578 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) [2021-08-21 18:21:44,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 18:21:53,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:21:53,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:53,164 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:21:53,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:54,877 INFO L354 Elim1Store]: treesize reduction 873, result has 1.8 percent of original size [2021-08-21 18:21:54,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 151 treesize of output 76 [2021-08-21 18:21:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:54,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78030055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:54,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:54,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-08-21 18:21:54,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937121412] [2021-08-21 18:21:54,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:21:54,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:54,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:21:54,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:21:54,913 INFO L87 Difference]: Start difference. First operand 2655 states and 4502 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:55,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:55,465 INFO L93 Difference]: Finished difference Result 4323 states and 7376 transitions. [2021-08-21 18:21:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:21:55,466 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:21:55,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:55,470 INFO L225 Difference]: With dead ends: 4323 [2021-08-21 18:21:55,470 INFO L226 Difference]: Without dead ends: 4296 [2021-08-21 18:21:55,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 844.2ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:21:55,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-08-21 18:21:55,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 2677. [2021-08-21 18:21:55,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2676 states have (on average 1.6973094170403586) internal successors, (4542), 2676 states have internal predecessors, (4542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 4542 transitions. [2021-08-21 18:21:55,500 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 4542 transitions. Word has length 43 [2021-08-21 18:21:55,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:55,500 INFO L470 AbstractCegarLoop]: Abstraction has 2677 states and 4542 transitions. [2021-08-21 18:21:55,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:55,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 4542 transitions. [2021-08-21 18:21:55,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:21:55,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:55,502 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:55,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-21 18:21:55,703 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,SelfDestructingSolverStorable113 [2021-08-21 18:21:55,703 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:21:55,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:55,703 INFO L82 PathProgramCache]: Analyzing trace with hash -924937600, now seen corresponding path program 109 times [2021-08-21 18:21:55,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:55,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913157707] [2021-08-21 18:21:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:55,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:56,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:56,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913157707] [2021-08-21 18:21:56,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913157707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:56,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952091701] [2021-08-21 18:21:56,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:21:56,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:56,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:56,269 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) [2021-08-21 18:21:56,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 18:22:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:04,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:22:04,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:06,663 INFO L354 Elim1Store]: treesize reduction 873, result has 1.8 percent of original size [2021-08-21 18:22:06,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 151 treesize of output 76 [2021-08-21 18:22:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:06,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952091701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:06,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:06,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-08-21 18:22:06,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960952202] [2021-08-21 18:22:06,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:22:06,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:06,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:22:06,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:22:06,700 INFO L87 Difference]: Start difference. First operand 2677 states and 4542 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:07,084 INFO L93 Difference]: Finished difference Result 3879 states and 6615 transitions. [2021-08-21 18:22:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:22:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:22:07,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:07,089 INFO L225 Difference]: With dead ends: 3879 [2021-08-21 18:22:07,089 INFO L226 Difference]: Without dead ends: 3870 [2021-08-21 18:22:07,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 842.0ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:22:07,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2021-08-21 18:22:07,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 2677. [2021-08-21 18:22:07,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2676 states have (on average 1.6973094170403586) internal successors, (4542), 2676 states have internal predecessors, (4542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 4542 transitions. [2021-08-21 18:22:07,115 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 4542 transitions. Word has length 43 [2021-08-21 18:22:07,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:07,115 INFO L470 AbstractCegarLoop]: Abstraction has 2677 states and 4542 transitions. [2021-08-21 18:22:07,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 4542 transitions. [2021-08-21 18:22:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:22:07,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:07,118 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:07,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:07,318 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,SelfDestructingSolverStorable114 [2021-08-21 18:22:07,319 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:22:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:07,319 INFO L82 PathProgramCache]: Analyzing trace with hash 161248176, now seen corresponding path program 110 times [2021-08-21 18:22:07,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:07,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748462031] [2021-08-21 18:22:07,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:07,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:07,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:07,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748462031] [2021-08-21 18:22:07,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748462031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:07,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591945493] [2021-08-21 18:22:07,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:22:07,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:07,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:07,824 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) [2021-08-21 18:22:07,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 18:22:16,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:22:16,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:16,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:22:16,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:18,292 INFO L354 Elim1Store]: treesize reduction 736, result has 1.7 percent of original size [2021-08-21 18:22:18,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 151 treesize of output 73 [2021-08-21 18:22:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:18,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591945493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:18,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:18,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 27 [2021-08-21 18:22:18,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536141788] [2021-08-21 18:22:18,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:22:18,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:18,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:22:18,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:22:18,328 INFO L87 Difference]: Start difference. First operand 2677 states and 4542 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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) [2021-08-21 18:22:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:18,908 INFO L93 Difference]: Finished difference Result 4373 states and 7347 transitions. [2021-08-21 18:22:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:22:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 43 [2021-08-21 18:22:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:18,914 INFO L225 Difference]: With dead ends: 4373 [2021-08-21 18:22:18,914 INFO L226 Difference]: Without dead ends: 4225 [2021-08-21 18:22:18,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 737.3ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:22:18,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-08-21 18:22:18,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 2859. [2021-08-21 18:22:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2858 states have (on average 1.7011896431070679) internal successors, (4862), 2858 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 4862 transitions. [2021-08-21 18:22:18,971 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 4862 transitions. Word has length 43 [2021-08-21 18:22:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:18,972 INFO L470 AbstractCegarLoop]: Abstraction has 2859 states and 4862 transitions. [2021-08-21 18:22:18,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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) [2021-08-21 18:22:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 4862 transitions. [2021-08-21 18:22:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:22:18,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:18,974 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:19,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 18:22:19,174 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,SelfDestructingSolverStorable115 [2021-08-21 18:22:19,174 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:22:19,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:19,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1973410080, now seen corresponding path program 111 times [2021-08-21 18:22:19,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:19,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68105758] [2021-08-21 18:22:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:19,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:19,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:19,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68105758] [2021-08-21 18:22:19,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68105758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:19,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87281329] [2021-08-21 18:22:19,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:22:19,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:19,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:19,758 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) [2021-08-21 18:22:19,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 18:22:28,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:22:28,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:28,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:22:28,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:30,308 INFO L354 Elim1Store]: treesize reduction 736, result has 1.7 percent of original size [2021-08-21 18:22:30,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 151 treesize of output 73 [2021-08-21 18:22:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:30,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87281329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:30,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:30,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-08-21 18:22:30,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003877577] [2021-08-21 18:22:30,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:22:30,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:30,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:22:30,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:22:30,345 INFO L87 Difference]: Start difference. First operand 2859 states and 4862 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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) [2021-08-21 18:22:30,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:30,837 INFO L93 Difference]: Finished difference Result 4869 states and 8383 transitions. [2021-08-21 18:22:30,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:22:30,837 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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 43 [2021-08-21 18:22:30,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:30,842 INFO L225 Difference]: With dead ends: 4869 [2021-08-21 18:22:30,842 INFO L226 Difference]: Without dead ends: 4770 [2021-08-21 18:22:30,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 817.7ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:22:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4770 states. [2021-08-21 18:22:30,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4770 to 2869. [2021-08-21 18:22:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2869 states, 2868 states have (on average 1.701534170153417) internal successors, (4880), 2868 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:30,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2869 states to 2869 states and 4880 transitions. [2021-08-21 18:22:30,872 INFO L78 Accepts]: Start accepts. Automaton has 2869 states and 4880 transitions. Word has length 43 [2021-08-21 18:22:30,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:30,872 INFO L470 AbstractCegarLoop]: Abstraction has 2869 states and 4880 transitions. [2021-08-21 18:22:30,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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) [2021-08-21 18:22:30,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2869 states and 4880 transitions. [2021-08-21 18:22:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:22:30,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:30,874 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:30,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 18:22:31,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:31,076 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:22:31,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:31,076 INFO L82 PathProgramCache]: Analyzing trace with hash 336045488, now seen corresponding path program 112 times [2021-08-21 18:22:31,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:31,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055598631] [2021-08-21 18:22:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:31,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:31,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:31,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055598631] [2021-08-21 18:22:31,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055598631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:31,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892796526] [2021-08-21 18:22:31,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:22:31,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:31,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:31,720 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) [2021-08-21 18:22:31,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 18:22:40,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:22:40,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:40,819 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:22:40,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:42,492 INFO L354 Elim1Store]: treesize reduction 736, result has 1.7 percent of original size [2021-08-21 18:22:42,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 151 treesize of output 73 [2021-08-21 18:22:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:42,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892796526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:42,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:42,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-08-21 18:22:42,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826943439] [2021-08-21 18:22:42,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:22:42,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:42,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:22:42,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:22:42,530 INFO L87 Difference]: Start difference. First operand 2869 states and 4880 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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) [2021-08-21 18:22:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:42,980 INFO L93 Difference]: Finished difference Result 3941 states and 6737 transitions. [2021-08-21 18:22:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:22:42,980 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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 43 [2021-08-21 18:22:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:42,984 INFO L225 Difference]: With dead ends: 3941 [2021-08-21 18:22:42,984 INFO L226 Difference]: Without dead ends: 3932 [2021-08-21 18:22:42,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 833.6ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:22:42,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2021-08-21 18:22:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 2872. [2021-08-21 18:22:43,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.7014977359804946) internal successors, (4885), 2871 states have internal predecessors, (4885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 4885 transitions. [2021-08-21 18:22:43,014 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 4885 transitions. Word has length 43 [2021-08-21 18:22:43,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:43,014 INFO L470 AbstractCegarLoop]: Abstraction has 2872 states and 4885 transitions. [2021-08-21 18:22:43,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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) [2021-08-21 18:22:43,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 4885 transitions. [2021-08-21 18:22:43,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:22:43,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:43,017 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:43,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-21 18:22:43,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:43,217 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:22:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2095258688, now seen corresponding path program 113 times [2021-08-21 18:22:43,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:43,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929098776] [2021-08-21 18:22:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:43,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:44,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:44,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929098776] [2021-08-21 18:22:44,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929098776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:44,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149095070] [2021-08-21 18:22:44,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:22:44,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:44,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:44,080 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:22:44,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 18:22:53,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:22:53,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:53,162 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 18:22:53,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:54,737 INFO L354 Elim1Store]: treesize reduction 611, result has 1.6 percent of original size [2021-08-21 18:22:54,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 151 treesize of output 70 [2021-08-21 18:22:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:54,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149095070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:54,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:54,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2021-08-21 18:22:54,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019966753] [2021-08-21 18:22:54,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:22:54,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:54,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:22:54,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:22:54,773 INFO L87 Difference]: Start difference. First operand 2872 states and 4885 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 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) [2021-08-21 18:22:55,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:55,335 INFO L93 Difference]: Finished difference Result 4433 states and 7590 transitions. [2021-08-21 18:22:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:22:55,336 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 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 43 [2021-08-21 18:22:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:55,340 INFO L225 Difference]: With dead ends: 4433 [2021-08-21 18:22:55,340 INFO L226 Difference]: Without dead ends: 4415 [2021-08-21 18:22:55,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 840.2ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:22:55,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4415 states. [2021-08-21 18:22:55,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4415 to 2900. [2021-08-21 18:22:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 1.7030010348395999) internal successors, (4937), 2899 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:55,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 4937 transitions. [2021-08-21 18:22:55,374 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 4937 transitions. Word has length 43 [2021-08-21 18:22:55,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:55,374 INFO L470 AbstractCegarLoop]: Abstraction has 2900 states and 4937 transitions. [2021-08-21 18:22:55,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 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) [2021-08-21 18:22:55,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 4937 transitions. [2021-08-21 18:22:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:22:55,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:55,377 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:55,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-21 18:22:55,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-08-21 18:22:55,593 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:22:55,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:55,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1288897168, now seen corresponding path program 114 times [2021-08-21 18:22:55,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:55,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610484518] [2021-08-21 18:22:55,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:55,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:56,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:56,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610484518] [2021-08-21 18:22:56,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610484518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:56,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313181344] [2021-08-21 18:22:56,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:22:56,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:56,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:56,162 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:22:56,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 18:23:00,376 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 [2021-08-21 18:23:00,376 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:23:01,398 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:23:01,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 18:23:01,576 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-21 18:23:01,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 [2021-08-21 18:23:01,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:01,598 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 44 with TraceHistMax 8,while executing Executor. [2021-08-21 18:23:01,600 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:23:01,600 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:23:01,609 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:23:01,609 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:23:01,611 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:23:01 BasicIcfg [2021-08-21 18:23:01,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:23:01,612 INFO L168 Benchmark]: Toolchain (without parser) took 695004.69 ms. Allocated memory was 186.6 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 166.3 MB in the beginning and 524.1 MB in the end (delta: -357.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-08-21 18:23:01,612 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.55 ms. Allocated memory is still 186.6 MB. Free memory is still 167.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:23:01,612 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.74 ms. Allocated memory is still 186.6 MB. Free memory was 166.3 MB in the beginning and 164.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:23:01,612 INFO L168 Benchmark]: Boogie Preprocessor took 16.39 ms. Allocated memory is still 186.6 MB. Free memory was 164.9 MB in the beginning and 163.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:23:01,612 INFO L168 Benchmark]: RCFGBuilder took 274.92 ms. Allocated memory is still 186.6 MB. Free memory was 163.8 MB in the beginning and 151.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:23:01,613 INFO L168 Benchmark]: TraceAbstraction took 694683.93 ms. Allocated memory was 186.6 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 151.3 MB in the beginning and 524.1 MB in the end (delta: -372.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-08-21 18:23:01,613 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 0.55 ms. Allocated memory is still 186.6 MB. Free memory is still 167.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.74 ms. Allocated memory is still 186.6 MB. Free memory was 166.3 MB in the beginning and 164.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.39 ms. Allocated memory is still 186.6 MB. Free memory was 164.9 MB in the beginning and 163.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 274.92 ms. Allocated memory is still 186.6 MB. Free memory was 163.8 MB in the beginning and 151.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 694683.93 ms. Allocated memory was 186.6 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 151.3 MB in the beginning and 524.1 MB in the end (delta: -372.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 29, positive: 18, positive conditional: 18, positive unconditional: 0, negative: 11, negative conditional: 11, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 20, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 20, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 20, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 7, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 20, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 20, unknown conditional: 0, unknown unconditional: 20] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Independence queries for same thread: 9 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 44 with TraceHistMax 8,while executing Executor. - TimeoutResultAtElement [Line: 55]: 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 44 with TraceHistMax 8,while executing Executor. - TimeoutResultAtElement [Line: 55]: 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 44 with TraceHistMax 8,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 694591.7ms, OverallIterations: 120, TraceHistogramMax: 8, EmptinessCheckTime: 136.2ms, AutomataDifference: 58280.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 97.1ms, PartialOrderReductionTime: 62.5ms, HoareTripleCheckerStatistics: 7569 SDtfs, 13207 SDslu, 89542 SDs, 0 SdLazy, 56560 SolverSat, 2313 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34573.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5973 GetRequests, 2855 SyntacticMatches, 369 SemanticMatches, 2749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17461 ImplicationChecksByTransitivity, 75592.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2900occurred in iteration=119, InterpolantAutomatonStates: 2518, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1418.6ms AutomataMinimizationTime, 119 MinimizatonAttempts, 75735 StatesRemovedByMinimization, 118 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 432.2ms SsaConstructionTime, 2625.4ms SatisfiabilityAnalysisTime, 174780.5ms InterpolantComputationTime, 8248 NumberOfCodeBlocks, 8248 NumberOfCodeBlocksAsserted, 556 NumberOfCheckSat, 8014 ConstructedInterpolants, 395 QuantifiedInterpolants, 250736 SizeOfPredicates, 117 NumberOfNonLiveVariables, 10442 ConjunctsInSsa, 5599 ConjunctsInUnsatCore, 234 InterpolantComputations, 4 PerfectInterpolantSequences, 449/16463 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