/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-more/multiply-verify.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:35:36,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:35:36,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:35:36,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 20:35:36,315 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 [2021-08-06 20:35:36,338 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:35:36,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:35:36,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:35:36,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:35:36,341 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:35:36,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:35:36,341 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:35:36,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:35:36,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:35:36,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:35:36,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:35:36,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:35:36,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:35:36,342 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:35:36,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:35:36,342 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:35:36,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:35:36,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:35:36,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:35:36,343 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:35:36,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:35:36,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:35:36,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:35:36,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:35:36,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:35:36,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:35:36,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:35:36,343 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:35:36,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:35:36,344 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:35:36,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:35:36,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:35:36,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:35:36,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:35:36,694 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:35:36,695 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:35:36,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl [2021-08-06 20:35:36,696 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl' [2021-08-06 20:35:36,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:35:36,732 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:35:36,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:35:36,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:35:36,735 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:35:36,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:35:36" (1/1) ... [2021-08-06 20:35:36,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:35:36" (1/1) ... [2021-08-06 20:35:36,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:35:36,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:35:36,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:35:36,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:35:36,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:35:36" (1/1) ... [2021-08-06 20:35:36,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:35:36" (1/1) ... [2021-08-06 20:35:36,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:35:36" (1/1) ... [2021-08-06 20:35:36,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:35:36" (1/1) ... [2021-08-06 20:35:36,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:35:36" (1/1) ... [2021-08-06 20:35:36,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:35:36" (1/1) ... [2021-08-06 20:35:36,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:35:36" (1/1) ... [2021-08-06 20:35:36,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:35:36,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:35:36,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:35:36,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:35:36,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:35:36" (1/1) ... [2021-08-06 20:35:36,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:35:36,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:36,808 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) [2021-08-06 20:35:36,812 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 [2021-08-06 20:35:36,832 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:35:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:35:36,832 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:35:36,832 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:35:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:35:36,832 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:35:36,832 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:35:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:35:36,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:35:36,832 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 20:35:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 20:35:36,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 20:35:36,833 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 20:35:37,029 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:35:37,029 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:35:37,031 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:35:37 BoogieIcfgContainer [2021-08-06 20:35:37,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:35:37,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:35:37,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:35:37,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:35:37,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:35:36" (1/2) ... [2021-08-06 20:35:37,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e31cab and model type multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:35:37, skipping insertion in model container [2021-08-06 20:35:37,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:35:37" (2/2) ... [2021-08-06 20:35:37,035 INFO L111 eAbstractionObserver]: Analyzing ICFG multiply-verify.wvr.bpl [2021-08-06 20:35:37,038 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:35:37,038 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:35:37,038 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:35:37,038 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:35:37,120 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 20:35:37,166 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:35:37,173 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 [2021-08-06 20:35:37,173 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 20:35:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand has 369 states, 272 states have (on average 1.5551470588235294) internal successors, (423), 368 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:37,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:35:37,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:37,358 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:37,359 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:37,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:37,362 INFO L82 PathProgramCache]: Analyzing trace with hash -271793270, now seen corresponding path program 1 times [2021-08-06 20:35:37,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:37,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459332902] [2021-08-06 20:35:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:37,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:37,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:37,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459332902] [2021-08-06 20:35:37,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459332902] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:35:37,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:35:37,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:35:37,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290620103] [2021-08-06 20:35:37,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:35:37,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:37,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:35:37,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:35:37,552 INFO L87 Difference]: Start difference. First operand has 369 states, 272 states have (on average 1.5551470588235294) internal successors, (423), 368 states have internal predecessors, (423), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:37,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:37,575 INFO L93 Difference]: Finished difference Result 171 states and 197 transitions. [2021-08-06 20:35:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 20:35:37,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:35:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:37,582 INFO L225 Difference]: With dead ends: 171 [2021-08-06 20:35:37,582 INFO L226 Difference]: Without dead ends: 43 [2021-08-06 20:35:37,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:35:37,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-06 20:35:37,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-08-06 20:35:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 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) [2021-08-06 20:35:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-08-06 20:35:37,602 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 22 [2021-08-06 20:35:37,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:37,603 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-08-06 20:35:37,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-08-06 20:35:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:35:37,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:37,604 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:37,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:35:37,604 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:37,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1987765268, now seen corresponding path program 2 times [2021-08-06 20:35:37,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:37,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851472056] [2021-08-06 20:35:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:37,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:37,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:35:37,698 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:35:37,716 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:37,723 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:37,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:37,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851472056] [2021-08-06 20:35:37,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851472056] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:35:37,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:35:37,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 20:35:37,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942708513] [2021-08-06 20:35:37,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:35:37,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:37,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:35:37,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:35:37,762 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:37,817 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2021-08-06 20:35:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:35:37,817 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:35:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:37,818 INFO L225 Difference]: With dead ends: 68 [2021-08-06 20:35:37,818 INFO L226 Difference]: Without dead ends: 53 [2021-08-06 20:35:37,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:35:37,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-06 20:35:37,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-08-06 20:35:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 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) [2021-08-06 20:35:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2021-08-06 20:35:37,822 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 22 [2021-08-06 20:35:37,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:37,822 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2021-08-06 20:35:37,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:37,822 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2021-08-06 20:35:37,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:35:37,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:37,823 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:37,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 20:35:37,823 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:37,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1423004114, now seen corresponding path program 3 times [2021-08-06 20:35:37,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:37,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320476260] [2021-08-06 20:35:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:37,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:37,873 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:37,880 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:37,906 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:37,913 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:37,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:37,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320476260] [2021-08-06 20:35:37,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320476260] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:35:37,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:35:37,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 20:35:37,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604270927] [2021-08-06 20:35:37,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:35:37,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:37,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:35:37,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:35:37,955 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:38,020 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2021-08-06 20:35:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:35:38,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:35:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:38,021 INFO L225 Difference]: With dead ends: 83 [2021-08-06 20:35:38,022 INFO L226 Difference]: Without dead ends: 68 [2021-08-06 20:35:38,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:35:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-06 20:35:38,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2021-08-06 20:35:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:38,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-08-06 20:35:38,025 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 22 [2021-08-06 20:35:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:38,025 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-08-06 20:35:38,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:38,026 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-08-06 20:35:38,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:35:38,026 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:38,026 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:38,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 20:35:38,026 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:38,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:38,027 INFO L82 PathProgramCache]: Analyzing trace with hash -25651578, now seen corresponding path program 1 times [2021-08-06 20:35:38,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:38,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628891575] [2021-08-06 20:35:38,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:38,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:38,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:38,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628891575] [2021-08-06 20:35:38,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628891575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:38,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216650906] [2021-08-06 20:35:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:38,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:38,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:38,059 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) [2021-08-06 20:35:38,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 20:35:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:38,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 20:35:38,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:38,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216650906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:38,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:38,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 20:35:38,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579369010] [2021-08-06 20:35:38,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:35:38,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:38,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:35:38,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:35:38,278 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) [2021-08-06 20:35:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:38,326 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2021-08-06 20:35:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:35:38,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 25 [2021-08-06 20:35:38,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:38,330 INFO L225 Difference]: With dead ends: 90 [2021-08-06 20:35:38,330 INFO L226 Difference]: Without dead ends: 90 [2021-08-06 20:35:38,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:35:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-06 20:35:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2021-08-06 20:35:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 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) [2021-08-06 20:35:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-08-06 20:35:38,341 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 25 [2021-08-06 20:35:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:38,341 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-08-06 20:35:38,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) [2021-08-06 20:35:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-08-06 20:35:38,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:35:38,342 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:38,342 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:38,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:38,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:38,562 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:38,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:38,563 INFO L82 PathProgramCache]: Analyzing trace with hash -869808898, now seen corresponding path program 1 times [2021-08-06 20:35:38,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:38,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136137548] [2021-08-06 20:35:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:38,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:38,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:38,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136137548] [2021-08-06 20:35:38,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136137548] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:35:38,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:35:38,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 20:35:38,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800102550] [2021-08-06 20:35:38,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:35:38,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:38,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:35:38,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:35:38,599 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:38,620 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-08-06 20:35:38,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:35:38,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:35:38,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:38,620 INFO L225 Difference]: With dead ends: 58 [2021-08-06 20:35:38,621 INFO L226 Difference]: Without dead ends: 49 [2021-08-06 20:35:38,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:35:38,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-06 20:35:38,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-08-06 20:35:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 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) [2021-08-06 20:35:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-08-06 20:35:38,623 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 25 [2021-08-06 20:35:38,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:38,623 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-08-06 20:35:38,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-08-06 20:35:38,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:38,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:38,624 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:38,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 20:35:38,624 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:38,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:38,624 INFO L82 PathProgramCache]: Analyzing trace with hash -2045768668, now seen corresponding path program 1 times [2021-08-06 20:35:38,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:38,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500748477] [2021-08-06 20:35:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:38,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:38,700 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:35:38,703 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:35:38,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:38,727 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:38,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:38,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500748477] [2021-08-06 20:35:38,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500748477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:38,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060090851] [2021-08-06 20:35:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:38,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:38,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:38,767 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) [2021-08-06 20:35:38,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 20:35:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:38,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 20:35:38,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:39,107 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 31.4 percent of original size [2021-08-06 20:35:39,108 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 31.4 percent of original size [2021-08-06 20:35:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:39,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060090851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:39,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:39,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 20:35:39,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678889092] [2021-08-06 20:35:39,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:35:39,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:39,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:35:39,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:35:39,143 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-08-06 20:35:39,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:39,210 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2021-08-06 20:35:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:35:39,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 28 [2021-08-06 20:35:39,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:39,211 INFO L225 Difference]: With dead ends: 77 [2021-08-06 20:35:39,211 INFO L226 Difference]: Without dead ends: 62 [2021-08-06 20:35:39,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:35:39,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-06 20:35:39,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-08-06 20:35:39,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 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) [2021-08-06 20:35:39,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2021-08-06 20:35:39,214 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 28 [2021-08-06 20:35:39,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:39,214 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2021-08-06 20:35:39,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-08-06 20:35:39,214 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2021-08-06 20:35:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:39,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:39,214 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:39,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:39,429 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 [2021-08-06 20:35:39,430 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:39,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:39,430 INFO L82 PathProgramCache]: Analyzing trace with hash -235429644, now seen corresponding path program 2 times [2021-08-06 20:35:39,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:39,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090279153] [2021-08-06 20:35:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:39,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:39,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:39,507 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:39,540 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:39,543 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:39,577 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:39,580 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:39,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:39,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090279153] [2021-08-06 20:35:39,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090279153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:39,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554367426] [2021-08-06 20:35:39,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:35:39,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:39,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:39,628 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) [2021-08-06 20:35:39,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 20:35:39,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:35:39,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:39,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 20:35:39,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:39,988 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 31.4 percent of original size [2021-08-06 20:35:39,989 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 31.4 percent of original size [2021-08-06 20:35:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:40,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554367426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:40,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:40,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 20:35:40,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039934822] [2021-08-06 20:35:40,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:35:40,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:40,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:35:40,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:35:40,023 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-08-06 20:35:40,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:40,097 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2021-08-06 20:35:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:35:40,098 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 28 [2021-08-06 20:35:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:40,098 INFO L225 Difference]: With dead ends: 98 [2021-08-06 20:35:40,098 INFO L226 Difference]: Without dead ends: 83 [2021-08-06 20:35:40,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:35:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-06 20:35:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2021-08-06 20:35:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.203125) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:40,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2021-08-06 20:35:40,101 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 28 [2021-08-06 20:35:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:40,101 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2021-08-06 20:35:40,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-08-06 20:35:40,101 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2021-08-06 20:35:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:35:40,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:40,102 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:40,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:40,318 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 [2021-08-06 20:35:40,319 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:40,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:40,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1015043266, now seen corresponding path program 3 times [2021-08-06 20:35:40,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:40,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517833880] [2021-08-06 20:35:40,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:40,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:40,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:40,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517833880] [2021-08-06 20:35:40,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517833880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:40,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571026204] [2021-08-06 20:35:40,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:35:40,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:40,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:40,369 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) [2021-08-06 20:35:40,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 20:35:40,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:35:40,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:40,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:35:40,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:40,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571026204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:40,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:40,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 20:35:40,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540876003] [2021-08-06 20:35:40,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:35:40,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:40,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:35:40,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:35:40,627 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-08-06 20:35:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:40,687 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2021-08-06 20:35:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:35:40,688 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 [2021-08-06 20:35:40,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:40,688 INFO L225 Difference]: With dead ends: 111 [2021-08-06 20:35:40,688 INFO L226 Difference]: Without dead ends: 111 [2021-08-06 20:35:40,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:35:40,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-06 20:35:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 56. [2021-08-06 20:35:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2021-08-06 20:35:40,691 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 31 [2021-08-06 20:35:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:40,691 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2021-08-06 20:35:40,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-08-06 20:35:40,691 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2021-08-06 20:35:40,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:35:40,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:40,692 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:40,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:40,905 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 [2021-08-06 20:35:40,905 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:40,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:40,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2022721990, now seen corresponding path program 4 times [2021-08-06 20:35:40,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:40,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780439803] [2021-08-06 20:35:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:40,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:40,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:40,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780439803] [2021-08-06 20:35:40,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780439803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:40,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629210819] [2021-08-06 20:35:40,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:35:40,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:40,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:40,945 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) [2021-08-06 20:35:40,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 20:35:41,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:35:41,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:41,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:35:41,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:41,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629210819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:41,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:41,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 20:35:41,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199210476] [2021-08-06 20:35:41,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:35:41,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:41,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:35:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:35:41,226 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-08-06 20:35:41,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:41,262 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-08-06 20:35:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:35:41,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 [2021-08-06 20:35:41,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:41,263 INFO L225 Difference]: With dead ends: 79 [2021-08-06 20:35:41,263 INFO L226 Difference]: Without dead ends: 61 [2021-08-06 20:35:41,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:35:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-06 20:35:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-08-06 20:35:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2021-08-06 20:35:41,266 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 31 [2021-08-06 20:35:41,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:41,266 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2021-08-06 20:35:41,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-08-06 20:35:41,266 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2021-08-06 20:35:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 20:35:41,267 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:41,267 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:41,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:41,481 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 [2021-08-06 20:35:41,481 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:41,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:41,482 INFO L82 PathProgramCache]: Analyzing trace with hash -652993428, now seen corresponding path program 5 times [2021-08-06 20:35:41,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:41,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433965454] [2021-08-06 20:35:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:41,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:41,577 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:35:41,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:35:41,595 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:41,598 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:41,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:41,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433965454] [2021-08-06 20:35:41,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433965454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:41,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820068256] [2021-08-06 20:35:41,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:35:41,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:41,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:41,634 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) [2021-08-06 20:35:41,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 20:35:41,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:35:41,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:41,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 20:35:41,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:42,224 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:35:42,225 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 59 treesize of output 33 [2021-08-06 20:35:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:42,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820068256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:42,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:42,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 20:35:42,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510342306] [2021-08-06 20:35:42,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:35:42,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:42,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:35:42,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:35:42,262 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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) [2021-08-06 20:35:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:42,348 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2021-08-06 20:35:42,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:35:42,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 34 [2021-08-06 20:35:42,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:42,349 INFO L225 Difference]: With dead ends: 112 [2021-08-06 20:35:42,350 INFO L226 Difference]: Without dead ends: 97 [2021-08-06 20:35:42,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:35:42,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-06 20:35:42,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2021-08-06 20:35:42,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:42,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-08-06 20:35:42,353 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 34 [2021-08-06 20:35:42,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:42,353 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-08-06 20:35:42,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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) [2021-08-06 20:35:42,353 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-08-06 20:35:42,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 20:35:42,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:42,354 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:42,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:42,573 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 [2021-08-06 20:35:42,574 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:42,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:42,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1168503314, now seen corresponding path program 6 times [2021-08-06 20:35:42,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:42,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210675244] [2021-08-06 20:35:42,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:42,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:42,650 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:42,654 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:42,676 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:42,679 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:42,701 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:42,704 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:42,727 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:42,730 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:42,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:42,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210675244] [2021-08-06 20:35:42,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210675244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:42,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184860677] [2021-08-06 20:35:42,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:35:42,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:42,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:42,774 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) [2021-08-06 20:35:42,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 20:35:42,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:35:42,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:42,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 20:35:42,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:43,410 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:35:43,410 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 52 treesize of output 37 [2021-08-06 20:35:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:43,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184860677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:43,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:43,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 20:35:43,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279861724] [2021-08-06 20:35:43,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:35:43,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:43,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:35:43,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:35:43,447 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-08-06 20:35:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:43,571 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2021-08-06 20:35:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:35:43,572 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 34 [2021-08-06 20:35:43,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:43,572 INFO L225 Difference]: With dead ends: 119 [2021-08-06 20:35:43,572 INFO L226 Difference]: Without dead ends: 104 [2021-08-06 20:35:43,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-06 20:35:43,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 77. [2021-08-06 20:35:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 76 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2021-08-06 20:35:43,576 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 34 [2021-08-06 20:35:43,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:43,576 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2021-08-06 20:35:43,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-08-06 20:35:43,576 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2021-08-06 20:35:43,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:35:43,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:43,577 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:43,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:43,811 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 [2021-08-06 20:35:43,812 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:43,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1702002694, now seen corresponding path program 7 times [2021-08-06 20:35:43,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:43,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341577298] [2021-08-06 20:35:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:43,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:43,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:43,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341577298] [2021-08-06 20:35:43,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341577298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:43,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437261441] [2021-08-06 20:35:43,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:35:43,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:43,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:43,872 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) [2021-08-06 20:35:43,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 20:35:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:44,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:35:44,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:44,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437261441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:44,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:44,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:35:44,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694507931] [2021-08-06 20:35:44,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:35:44,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:35:44,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:35:44,323 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-08-06 20:35:44,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:44,392 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2021-08-06 20:35:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:35:44,392 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-08-06 20:35:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:44,393 INFO L225 Difference]: With dead ends: 132 [2021-08-06 20:35:44,393 INFO L226 Difference]: Without dead ends: 132 [2021-08-06 20:35:44,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:44,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-08-06 20:35:44,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 68. [2021-08-06 20:35:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-08-06 20:35:44,395 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 37 [2021-08-06 20:35:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:44,396 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-08-06 20:35:44,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-08-06 20:35:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-08-06 20:35:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:35:44,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:44,396 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:44,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-06 20:35:44,614 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 [2021-08-06 20:35:44,614 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:44,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:44,615 INFO L82 PathProgramCache]: Analyzing trace with hash 510850174, now seen corresponding path program 8 times [2021-08-06 20:35:44,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:44,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777860549] [2021-08-06 20:35:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:44,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:44,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:44,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777860549] [2021-08-06 20:35:44,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777860549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:44,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631789595] [2021-08-06 20:35:44,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:35:44,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:44,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:44,683 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) [2021-08-06 20:35:44,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 20:35:44,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:35:44,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:44,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:35:44,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:45,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631789595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:45,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:45,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:35:45,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357537259] [2021-08-06 20:35:45,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:35:45,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:45,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:35:45,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:35:45,127 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-08-06 20:35:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:45,183 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2021-08-06 20:35:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:35:45,183 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-08-06 20:35:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:45,184 INFO L225 Difference]: With dead ends: 100 [2021-08-06 20:35:45,184 INFO L226 Difference]: Without dead ends: 73 [2021-08-06 20:35:45,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:35:45,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-06 20:35:45,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-08-06 20:35:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 70 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:45,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2021-08-06 20:35:45,186 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 37 [2021-08-06 20:35:45,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:45,186 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2021-08-06 20:35:45,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-08-06 20:35:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2021-08-06 20:35:45,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 20:35:45,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:45,186 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:45,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:45,404 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 [2021-08-06 20:35:45,404 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:45,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:45,405 INFO L82 PathProgramCache]: Analyzing trace with hash -90459484, now seen corresponding path program 9 times [2021-08-06 20:35:45,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:45,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549850839] [2021-08-06 20:35:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:45,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:45,540 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:35:45,543 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:35:45,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:45,565 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:45,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:45,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549850839] [2021-08-06 20:35:45,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549850839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:45,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426575210] [2021-08-06 20:35:45,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:35:45,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:45,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:45,605 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) [2021-08-06 20:35:45,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 20:35:45,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:35:45,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:45,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:35:45,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:46,368 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:35:46,368 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 59 treesize of output 33 [2021-08-06 20:35:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:46,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426575210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:46,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:46,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-06 20:35:46,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862581853] [2021-08-06 20:35:46,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:35:46,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:46,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:35:46,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:35:46,454 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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) [2021-08-06 20:35:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:46,601 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2021-08-06 20:35:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:35:46,601 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 40 [2021-08-06 20:35:46,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:46,602 INFO L225 Difference]: With dead ends: 133 [2021-08-06 20:35:46,602 INFO L226 Difference]: Without dead ends: 118 [2021-08-06 20:35:46,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:35:46,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-06 20:35:46,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2021-08-06 20:35:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-08-06 20:35:46,604 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 40 [2021-08-06 20:35:46,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:46,604 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-08-06 20:35:46,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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) [2021-08-06 20:35:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-08-06 20:35:46,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 20:35:46,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:46,605 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:46,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:46,822 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 [2021-08-06 20:35:46,822 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:46,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:46,823 INFO L82 PathProgramCache]: Analyzing trace with hash -876834892, now seen corresponding path program 10 times [2021-08-06 20:35:46,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:46,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944474286] [2021-08-06 20:35:46,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:46,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:46,904 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:46,907 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:46,926 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:46,929 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:46,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:46,952 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:46,974 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:46,977 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:47,001 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:47,003 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:47,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:47,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944474286] [2021-08-06 20:35:47,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944474286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:47,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881406004] [2021-08-06 20:35:47,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:35:47,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:47,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:47,046 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) [2021-08-06 20:35:47,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 20:35:47,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:35:47,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:47,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:35:47,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:47,922 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:35:47,923 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 52 treesize of output 37 [2021-08-06 20:35:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:47,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881406004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:47,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:47,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-06 20:35:47,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838521490] [2021-08-06 20:35:47,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:35:47,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:47,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:35:47,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:35:47,953 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:48,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:48,152 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2021-08-06 20:35:48,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:35:48,152 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 20:35:48,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:48,152 INFO L225 Difference]: With dead ends: 140 [2021-08-06 20:35:48,152 INFO L226 Difference]: Without dead ends: 125 [2021-08-06 20:35:48,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:35:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-06 20:35:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 89. [2021-08-06 20:35:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 88 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-08-06 20:35:48,155 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 40 [2021-08-06 20:35:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:48,155 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-08-06 20:35:48,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-08-06 20:35:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:35:48,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:48,155 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:48,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-06 20:35:48,355 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 [2021-08-06 20:35:48,356 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:48,356 INFO L82 PathProgramCache]: Analyzing trace with hash 602110654, now seen corresponding path program 11 times [2021-08-06 20:35:48,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:48,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776458076] [2021-08-06 20:35:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:48,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:48,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:48,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776458076] [2021-08-06 20:35:48,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776458076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:48,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616672448] [2021-08-06 20:35:48,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:35:48,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:48,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:48,426 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) [2021-08-06 20:35:48,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 20:35:48,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:35:48,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:48,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:35:48,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:48,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616672448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:48,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:48,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 20:35:48,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024269364] [2021-08-06 20:35:48,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:35:48,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:48,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:35:48,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:35:48,998 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:49,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:49,142 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2021-08-06 20:35:49,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:35:49,143 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:35:49,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:49,143 INFO L225 Difference]: With dead ends: 153 [2021-08-06 20:35:49,143 INFO L226 Difference]: Without dead ends: 153 [2021-08-06 20:35:49,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:35:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-06 20:35:49,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 80. [2021-08-06 20:35:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 79 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-08-06 20:35:49,145 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 43 [2021-08-06 20:35:49,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:49,146 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-08-06 20:35:49,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:49,146 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-08-06 20:35:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:35:49,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:49,147 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:49,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:49,383 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 [2021-08-06 20:35:49,384 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:49,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:49,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2813114, now seen corresponding path program 12 times [2021-08-06 20:35:49,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:49,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173071900] [2021-08-06 20:35:49,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:49,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:49,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:49,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173071900] [2021-08-06 20:35:49,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173071900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:49,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385191538] [2021-08-06 20:35:49,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:35:49,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:49,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:49,476 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) [2021-08-06 20:35:49,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 20:35:49,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:35:49,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:49,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:35:49,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:50,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385191538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:50,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:50,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 20:35:50,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226030854] [2021-08-06 20:35:50,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:35:50,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:50,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:35:50,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:35:50,043 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:50,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:50,115 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-08-06 20:35:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:35:50,116 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:35:50,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:50,116 INFO L225 Difference]: With dead ends: 121 [2021-08-06 20:35:50,116 INFO L226 Difference]: Without dead ends: 85 [2021-08-06 20:35:50,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:35:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-06 20:35:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-08-06 20:35:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 82 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2021-08-06 20:35:50,118 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 43 [2021-08-06 20:35:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:50,118 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2021-08-06 20:35:50,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2021-08-06 20:35:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-06 20:35:50,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:50,119 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:50,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-06 20:35:50,331 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 [2021-08-06 20:35:50,332 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:50,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:50,332 INFO L82 PathProgramCache]: Analyzing trace with hash -668721940, now seen corresponding path program 13 times [2021-08-06 20:35:50,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:50,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689132384] [2021-08-06 20:35:50,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:50,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:50,528 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:35:50,530 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:35:50,548 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:50,551 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:50,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:50,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689132384] [2021-08-06 20:35:50,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689132384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:50,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450222494] [2021-08-06 20:35:50,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:35:50,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:50,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:50,594 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) [2021-08-06 20:35:50,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 20:35:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:50,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 20:35:50,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:51,580 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:35:51,580 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 59 treesize of output 33 [2021-08-06 20:35:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:51,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450222494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:51,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:51,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-06 20:35:51,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470128158] [2021-08-06 20:35:51,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:35:51,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:35:51,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:35:51,638 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:51,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:51,806 INFO L93 Difference]: Finished difference Result 154 states and 173 transitions. [2021-08-06 20:35:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:35:51,806 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-06 20:35:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:51,807 INFO L225 Difference]: With dead ends: 154 [2021-08-06 20:35:51,807 INFO L226 Difference]: Without dead ends: 139 [2021-08-06 20:35:51,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:35:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-06 20:35:51,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 91. [2021-08-06 20:35:51,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 90 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2021-08-06 20:35:51,810 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 46 [2021-08-06 20:35:51,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:51,810 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2021-08-06 20:35:51,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:51,810 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2021-08-06 20:35:51,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-06 20:35:51,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:51,811 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:51,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:52,030 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 [2021-08-06 20:35:52,030 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:52,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:52,030 INFO L82 PathProgramCache]: Analyzing trace with hash -910900654, now seen corresponding path program 14 times [2021-08-06 20:35:52,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:52,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190497496] [2021-08-06 20:35:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:52,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:52,144 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:52,146 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:52,164 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:52,167 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:52,187 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:52,190 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:52,219 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:52,221 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:52,243 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:52,246 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:52,274 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:52,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:52,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:52,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190497496] [2021-08-06 20:35:52,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190497496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:52,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892416548] [2021-08-06 20:35:52,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:35:52,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:52,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:52,328 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) [2021-08-06 20:35:52,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 20:35:52,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:35:52,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:52,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:35:52,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:53,347 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:35:53,347 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 61 treesize of output 33 [2021-08-06 20:35:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:53,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892416548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:53,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:53,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-08-06 20:35:53,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873354760] [2021-08-06 20:35:53,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:35:53,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:53,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:35:53,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:35:53,398 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:53,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:53,764 INFO L93 Difference]: Finished difference Result 176 states and 199 transitions. [2021-08-06 20:35:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:35:53,764 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-06 20:35:53,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:53,765 INFO L225 Difference]: With dead ends: 176 [2021-08-06 20:35:53,765 INFO L226 Difference]: Without dead ends: 161 [2021-08-06 20:35:53,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:35:53,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-06 20:35:53,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 101. [2021-08-06 20:35:53,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.13) internal successors, (113), 100 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:53,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2021-08-06 20:35:53,767 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 46 [2021-08-06 20:35:53,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:53,768 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2021-08-06 20:35:53,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:53,768 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2021-08-06 20:35:53,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:35:53,768 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:53,768 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:53,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-06 20:35:53,976 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 [2021-08-06 20:35:53,977 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:53,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:53,977 INFO L82 PathProgramCache]: Analyzing trace with hash -304617082, now seen corresponding path program 15 times [2021-08-06 20:35:53,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:53,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095386703] [2021-08-06 20:35:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:53,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:54,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:54,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095386703] [2021-08-06 20:35:54,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095386703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:54,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708570396] [2021-08-06 20:35:54,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:35:54,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:54,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:54,078 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) [2021-08-06 20:35:54,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 20:35:54,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:35:54,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:54,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 20:35:54,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:54,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708570396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:54,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:54,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-06 20:35:54,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861271889] [2021-08-06 20:35:54,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:35:54,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:54,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:35:54,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:54,792 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 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) [2021-08-06 20:35:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:54,897 INFO L93 Difference]: Finished difference Result 174 states and 192 transitions. [2021-08-06 20:35:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:35:54,897 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 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 49 [2021-08-06 20:35:54,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:54,898 INFO L225 Difference]: With dead ends: 174 [2021-08-06 20:35:54,898 INFO L226 Difference]: Without dead ends: 174 [2021-08-06 20:35:54,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:35:54,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-06 20:35:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 92. [2021-08-06 20:35:54,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:54,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-08-06 20:35:54,909 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 49 [2021-08-06 20:35:54,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:54,913 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-08-06 20:35:54,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 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) [2021-08-06 20:35:54,913 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-08-06 20:35:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 20:35:54,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:54,914 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:54,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:55,129 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 [2021-08-06 20:35:55,129 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:55,130 INFO L82 PathProgramCache]: Analyzing trace with hash 94184446, now seen corresponding path program 16 times [2021-08-06 20:35:55,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:55,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743620812] [2021-08-06 20:35:55,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:55,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:55,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:55,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743620812] [2021-08-06 20:35:55,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743620812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:55,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704883886] [2021-08-06 20:35:55,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:35:55,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:55,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:55,239 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) [2021-08-06 20:35:55,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 20:35:55,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:35:55,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:55,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 20:35:55,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:55,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704883886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:55,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:55,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-06 20:35:55,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810579926] [2021-08-06 20:35:55,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:35:55,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:55,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:35:55,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:55,974 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 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) [2021-08-06 20:35:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:56,076 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2021-08-06 20:35:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:35:56,086 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 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 49 [2021-08-06 20:35:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:56,087 INFO L225 Difference]: With dead ends: 142 [2021-08-06 20:35:56,087 INFO L226 Difference]: Without dead ends: 97 [2021-08-06 20:35:56,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:35:56,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-06 20:35:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-08-06 20:35:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 94 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2021-08-06 20:35:56,089 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 49 [2021-08-06 20:35:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:56,089 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2021-08-06 20:35:56,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 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) [2021-08-06 20:35:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2021-08-06 20:35:56,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 20:35:56,089 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:56,089 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:56,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-06 20:35:56,308 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 [2021-08-06 20:35:56,308 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:56,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:56,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1945380572, now seen corresponding path program 17 times [2021-08-06 20:35:56,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:56,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562087574] [2021-08-06 20:35:56,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:56,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:56,553 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:35:56,554 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:35:56,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:56,576 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:56,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:56,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562087574] [2021-08-06 20:35:56,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562087574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:56,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812770388] [2021-08-06 20:35:56,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:35:56,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:56,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:56,619 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) [2021-08-06 20:35:56,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 20:35:57,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:35:57,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:57,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:35:57,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:57,841 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:35:57,842 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 65 treesize of output 39 [2021-08-06 20:35:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:57,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812770388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:57,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:57,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-08-06 20:35:57,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47651385] [2021-08-06 20:35:57,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 20:35:57,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:57,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 20:35:57,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:35:57,880 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:58,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:58,087 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2021-08-06 20:35:58,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:35:58,087 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 20:35:58,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:58,088 INFO L225 Difference]: With dead ends: 175 [2021-08-06 20:35:58,088 INFO L226 Difference]: Without dead ends: 160 [2021-08-06 20:35:58,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 349.2ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:35:58,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-06 20:35:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 103. [2021-08-06 20:35:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 102 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2021-08-06 20:35:58,091 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 52 [2021-08-06 20:35:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:58,091 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2021-08-06 20:35:58,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2021-08-06 20:35:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 20:35:58,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:58,092 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:58,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:58,300 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 [2021-08-06 20:35:58,301 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:58,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:58,301 INFO L82 PathProgramCache]: Analyzing trace with hash 769576564, now seen corresponding path program 18 times [2021-08-06 20:35:58,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:58,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718865080] [2021-08-06 20:35:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:58,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:58,437 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:58,440 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:58,460 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:58,463 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:58,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:58,487 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:58,509 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:58,511 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:58,533 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:58,535 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:35:58,561 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:58,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:35:58,588 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:58,590 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:35:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:58,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:58,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718865080] [2021-08-06 20:35:58,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718865080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:58,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311465150] [2021-08-06 20:35:58,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:35:58,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:58,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:58,641 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) [2021-08-06 20:35:58,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 20:35:59,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:35:59,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:59,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 20:35:59,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:59,851 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:35:59,852 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 67 treesize of output 39 [2021-08-06 20:35:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:59,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311465150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:59,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:59,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-08-06 20:35:59,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206177194] [2021-08-06 20:35:59,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:35:59,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:59,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:35:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:35:59,890 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:00,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:00,339 INFO L93 Difference]: Finished difference Result 197 states and 220 transitions. [2021-08-06 20:36:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:36:00,339 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 20:36:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:00,340 INFO L225 Difference]: With dead ends: 197 [2021-08-06 20:36:00,340 INFO L226 Difference]: Without dead ends: 182 [2021-08-06 20:36:00,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 584.0ms TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:36:00,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-06 20:36:00,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 113. [2021-08-06 20:36:00,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1160714285714286) internal successors, (125), 112 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2021-08-06 20:36:00,342 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 52 [2021-08-06 20:36:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:00,342 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2021-08-06 20:36:00,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2021-08-06 20:36:00,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 20:36:00,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:00,343 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:00,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:00,552 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 [2021-08-06 20:36:00,553 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:00,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:00,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1724495298, now seen corresponding path program 19 times [2021-08-06 20:36:00,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:00,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56321054] [2021-08-06 20:36:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:00,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:00,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:00,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56321054] [2021-08-06 20:36:00,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56321054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:00,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751028158] [2021-08-06 20:36:00,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:36:00,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:00,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:00,659 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) [2021-08-06 20:36:00,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 20:36:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:01,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:36:01,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:01,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751028158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:01,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:01,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-08-06 20:36:01,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92211985] [2021-08-06 20:36:01,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:36:01,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:01,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:36:01,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:36:01,552 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 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) [2021-08-06 20:36:01,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:01,687 INFO L93 Difference]: Finished difference Result 195 states and 213 transitions. [2021-08-06 20:36:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:36:01,688 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 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 55 [2021-08-06 20:36:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:01,688 INFO L225 Difference]: With dead ends: 195 [2021-08-06 20:36:01,688 INFO L226 Difference]: Without dead ends: 195 [2021-08-06 20:36:01,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=270, Invalid=600, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:36:01,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-06 20:36:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 104. [2021-08-06 20:36:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 103 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2021-08-06 20:36:01,691 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 55 [2021-08-06 20:36:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:01,691 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2021-08-06 20:36:01,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 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) [2021-08-06 20:36:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2021-08-06 20:36:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 20:36:01,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:01,691 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:01,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:01,909 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 [2021-08-06 20:36:01,910 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:01,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:01,910 INFO L82 PathProgramCache]: Analyzing trace with hash -907715386, now seen corresponding path program 20 times [2021-08-06 20:36:01,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:01,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236826339] [2021-08-06 20:36:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:01,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:02,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:02,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236826339] [2021-08-06 20:36:02,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236826339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:02,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840708823] [2021-08-06 20:36:02,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:36:02,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:02,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:02,008 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) [2021-08-06 20:36:02,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 20:36:02,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:36:02,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:02,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:36:02,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:02,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840708823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:02,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:02,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-08-06 20:36:02,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739856436] [2021-08-06 20:36:02,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:36:02,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:02,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:36:02,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:36:02,970 INFO L87 Difference]: Start difference. First operand 104 states and 113 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 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) [2021-08-06 20:36:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:03,065 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2021-08-06 20:36:03,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:36:03,065 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 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 55 [2021-08-06 20:36:03,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:03,066 INFO L225 Difference]: With dead ends: 163 [2021-08-06 20:36:03,066 INFO L226 Difference]: Without dead ends: 109 [2021-08-06 20:36:03,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:36:03,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-06 20:36:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-08-06 20:36:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0943396226415094) internal successors, (116), 106 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2021-08-06 20:36:03,068 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 55 [2021-08-06 20:36:03,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:03,068 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2021-08-06 20:36:03,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 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) [2021-08-06 20:36:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2021-08-06 20:36:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-06 20:36:03,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:03,069 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:03,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:03,286 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 [2021-08-06 20:36:03,286 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:03,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:03,287 INFO L82 PathProgramCache]: Analyzing trace with hash -404415124, now seen corresponding path program 21 times [2021-08-06 20:36:03,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:03,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075362004] [2021-08-06 20:36:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:03,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:03,528 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:36:03,530 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:36:03,553 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:03,555 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:03,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:03,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075362004] [2021-08-06 20:36:03,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075362004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:03,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300866396] [2021-08-06 20:36:03,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:36:03,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:03,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:03,621 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) [2021-08-06 20:36:03,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 20:36:04,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 20:36:04,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:04,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 20:36:04,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:05,124 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:36:05,125 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 59 treesize of output 33 [2021-08-06 20:36:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:05,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300866396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:05,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:05,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-08-06 20:36:05,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55534496] [2021-08-06 20:36:05,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:36:05,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:05,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:36:05,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:36:05,178 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:05,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:05,409 INFO L93 Difference]: Finished difference Result 196 states and 215 transitions. [2021-08-06 20:36:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:36:05,410 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-06 20:36:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:05,411 INFO L225 Difference]: With dead ends: 196 [2021-08-06 20:36:05,411 INFO L226 Difference]: Without dead ends: 181 [2021-08-06 20:36:05,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 444.7ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:36:05,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-06 20:36:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 115. [2021-08-06 20:36:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.105263157894737) internal successors, (126), 114 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:05,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-08-06 20:36:05,413 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 58 [2021-08-06 20:36:05,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:05,413 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-08-06 20:36:05,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:05,413 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-08-06 20:36:05,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-06 20:36:05,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:05,414 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:05,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:05,614 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 [2021-08-06 20:36:05,615 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:05,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:05,615 INFO L82 PathProgramCache]: Analyzing trace with hash -24526190, now seen corresponding path program 22 times [2021-08-06 20:36:05,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:05,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846360035] [2021-08-06 20:36:05,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:05,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:05,735 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:05,737 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:05,756 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:05,758 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:05,778 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:05,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:05,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:05,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:05,824 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:05,826 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:05,848 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:05,850 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:05,874 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:05,876 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:05,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:05,904 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:05,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:05,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846360035] [2021-08-06 20:36:05,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846360035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:05,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19062108] [2021-08-06 20:36:05,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:36:05,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:05,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:05,965 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) [2021-08-06 20:36:05,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 20:36:06,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:36:06,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:06,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 20:36:06,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:07,583 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:36:07,583 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 52 treesize of output 37 [2021-08-06 20:36:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:07,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19062108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:07,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:07,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-08-06 20:36:07,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426778765] [2021-08-06 20:36:07,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 20:36:07,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:07,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 20:36:07,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:36:07,611 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:07,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:07,844 INFO L93 Difference]: Finished difference Result 203 states and 223 transitions. [2021-08-06 20:36:07,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:36:07,844 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-06 20:36:07,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:07,845 INFO L225 Difference]: With dead ends: 203 [2021-08-06 20:36:07,845 INFO L226 Difference]: Without dead ends: 188 [2021-08-06 20:36:07,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 402.4ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:36:07,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-08-06 20:36:07,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 125. [2021-08-06 20:36:07,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1048387096774193) internal successors, (137), 124 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:07,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2021-08-06 20:36:07,847 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 58 [2021-08-06 20:36:07,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:07,847 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2021-08-06 20:36:07,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:07,847 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2021-08-06 20:36:07,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-06 20:36:07,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:07,848 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:07,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:08,065 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 [2021-08-06 20:36:08,065 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:08,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:08,066 INFO L82 PathProgramCache]: Analyzing trace with hash -317140218, now seen corresponding path program 23 times [2021-08-06 20:36:08,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:08,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659543203] [2021-08-06 20:36:08,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:08,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:08,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:08,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659543203] [2021-08-06 20:36:08,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659543203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:08,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091134005] [2021-08-06 20:36:08,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:36:08,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:08,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:08,185 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) [2021-08-06 20:36:08,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 20:36:08,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 20:36:08,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:08,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 20:36:08,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:09,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091134005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:09,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:09,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-08-06 20:36:09,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371905191] [2021-08-06 20:36:09,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:36:09,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:09,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:36:09,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:36:09,313 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:09,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:09,512 INFO L93 Difference]: Finished difference Result 216 states and 234 transitions. [2021-08-06 20:36:09,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:36:09,512 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-06 20:36:09,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:09,513 INFO L225 Difference]: With dead ends: 216 [2021-08-06 20:36:09,513 INFO L226 Difference]: Without dead ends: 216 [2021-08-06 20:36:09,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=344, Invalid=778, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:36:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-08-06 20:36:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 116. [2021-08-06 20:36:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0869565217391304) internal successors, (125), 115 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2021-08-06 20:36:09,515 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 61 [2021-08-06 20:36:09,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:09,515 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2021-08-06 20:36:09,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:09,515 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2021-08-06 20:36:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-06 20:36:09,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:09,516 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:09,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:09,734 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 [2021-08-06 20:36:09,734 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:09,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:09,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1383486334, now seen corresponding path program 24 times [2021-08-06 20:36:09,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:09,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086859478] [2021-08-06 20:36:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:09,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:09,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:09,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086859478] [2021-08-06 20:36:09,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086859478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:09,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141852563] [2021-08-06 20:36:09,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:36:09,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:09,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:09,856 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) [2021-08-06 20:36:09,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 20:36:10,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 20:36:10,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:10,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 20:36:10,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:11,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141852563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:11,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:11,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-08-06 20:36:11,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831377446] [2021-08-06 20:36:11,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:36:11,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:11,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:36:11,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:36:11,078 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:11,199 INFO L93 Difference]: Finished difference Result 184 states and 193 transitions. [2021-08-06 20:36:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:36:11,199 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-06 20:36:11,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:11,200 INFO L225 Difference]: With dead ends: 184 [2021-08-06 20:36:11,200 INFO L226 Difference]: Without dead ends: 121 [2021-08-06 20:36:11,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:36:11,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-06 20:36:11,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-08-06 20:36:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0847457627118644) internal successors, (128), 118 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2021-08-06 20:36:11,202 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 61 [2021-08-06 20:36:11,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:11,202 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2021-08-06 20:36:11,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:11,202 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2021-08-06 20:36:11,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-06 20:36:11,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:11,203 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:11,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:11,421 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 [2021-08-06 20:36:11,421 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:11,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1359970396, now seen corresponding path program 25 times [2021-08-06 20:36:11,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:11,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995936215] [2021-08-06 20:36:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:11,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:11,721 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:36:11,723 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:36:11,750 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:11,752 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:11,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:11,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995936215] [2021-08-06 20:36:11,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995936215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:11,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124186181] [2021-08-06 20:36:11,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:36:11,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:11,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:11,807 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) [2021-08-06 20:36:11,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 20:36:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:12,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:36:12,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:13,586 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:36:13,586 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 65 treesize of output 39 [2021-08-06 20:36:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:13,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124186181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:13,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:13,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-08-06 20:36:13,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466026940] [2021-08-06 20:36:13,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 20:36:13,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:13,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 20:36:13,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:36:13,623 INFO L87 Difference]: Start difference. First operand 119 states and 128 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:13,908 INFO L93 Difference]: Finished difference Result 217 states and 236 transitions. [2021-08-06 20:36:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:36:13,908 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-08-06 20:36:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:13,909 INFO L225 Difference]: With dead ends: 217 [2021-08-06 20:36:13,909 INFO L226 Difference]: Without dead ends: 202 [2021-08-06 20:36:13,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 544.0ms TimeCoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:36:13,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-06 20:36:13,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 127. [2021-08-06 20:36:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 126 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2021-08-06 20:36:13,911 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 64 [2021-08-06 20:36:13,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:13,911 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2021-08-06 20:36:13,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2021-08-06 20:36:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-06 20:36:13,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:13,912 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:13,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:14,128 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 [2021-08-06 20:36:14,129 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:14,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:14,129 INFO L82 PathProgramCache]: Analyzing trace with hash 588406068, now seen corresponding path program 26 times [2021-08-06 20:36:14,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:14,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489294377] [2021-08-06 20:36:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:14,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:14,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:14,281 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:14,303 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:14,306 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:14,328 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:14,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:14,353 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:14,355 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:14,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:14,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:14,407 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:14,409 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:14,436 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:14,438 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:14,467 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:14,469 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:14,499 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:14,501 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:14,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:14,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489294377] [2021-08-06 20:36:14,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489294377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:14,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680167390] [2021-08-06 20:36:14,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:36:14,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:14,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:14,568 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) [2021-08-06 20:36:14,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 20:36:15,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:36:15,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:15,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 20:36:15,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:16,370 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:36:16,370 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 67 treesize of output 39 [2021-08-06 20:36:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:16,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680167390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:16,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:16,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 32 [2021-08-06 20:36:16,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640423781] [2021-08-06 20:36:16,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 20:36:16,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:16,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 20:36:16,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:36:16,438 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:17,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:17,045 INFO L93 Difference]: Finished difference Result 239 states and 262 transitions. [2021-08-06 20:36:17,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:36:17,046 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-08-06 20:36:17,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:17,047 INFO L225 Difference]: With dead ends: 239 [2021-08-06 20:36:17,047 INFO L226 Difference]: Without dead ends: 224 [2021-08-06 20:36:17,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 809.1ms TimeCoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:36:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-06 20:36:17,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2021-08-06 20:36:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0955882352941178) internal successors, (149), 136 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 149 transitions. [2021-08-06 20:36:17,049 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 149 transitions. Word has length 64 [2021-08-06 20:36:17,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:17,049 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 149 transitions. [2021-08-06 20:36:17,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:17,050 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 149 transitions. [2021-08-06 20:36:17,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 20:36:17,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:17,050 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:17,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:17,256 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 [2021-08-06 20:36:17,257 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:17,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1548229054, now seen corresponding path program 27 times [2021-08-06 20:36:17,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:17,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430508733] [2021-08-06 20:36:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:17,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 70 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:17,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:17,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430508733] [2021-08-06 20:36:17,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430508733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:17,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931984212] [2021-08-06 20:36:17,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:36:17,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:17,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:17,423 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) [2021-08-06 20:36:17,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 20:36:18,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-06 20:36:18,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:18,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 20:36:18,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 70 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:18,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931984212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:18,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:18,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-08-06 20:36:18,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272895299] [2021-08-06 20:36:18,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:36:18,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:18,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:36:18,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:36:18,768 INFO L87 Difference]: Start difference. First operand 137 states and 149 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:18,947 INFO L93 Difference]: Finished difference Result 237 states and 255 transitions. [2021-08-06 20:36:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:36:18,948 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 20:36:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:18,948 INFO L225 Difference]: With dead ends: 237 [2021-08-06 20:36:18,949 INFO L226 Difference]: Without dead ends: 237 [2021-08-06 20:36:18,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=427, Invalid=979, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:36:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-08-06 20:36:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 128. [2021-08-06 20:36:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.078740157480315) internal successors, (137), 127 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2021-08-06 20:36:18,951 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 67 [2021-08-06 20:36:18,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:18,951 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2021-08-06 20:36:18,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:18,951 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2021-08-06 20:36:18,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 20:36:18,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:18,952 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:18,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:19,170 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 [2021-08-06 20:36:19,170 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:19,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:19,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1479616070, now seen corresponding path program 28 times [2021-08-06 20:36:19,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:19,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482182639] [2021-08-06 20:36:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:19,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 92 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:19,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:19,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482182639] [2021-08-06 20:36:19,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482182639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:19,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667565664] [2021-08-06 20:36:19,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:36:19,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:19,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:19,337 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) [2021-08-06 20:36:19,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 20:36:20,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:36:20,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:20,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 20:36:20,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 92 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:20,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667565664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:20,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:20,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-08-06 20:36:20,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908668157] [2021-08-06 20:36:20,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:36:20,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:20,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:36:20,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:36:20,764 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:20,897 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2021-08-06 20:36:20,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:36:20,898 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 20:36:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:20,898 INFO L225 Difference]: With dead ends: 205 [2021-08-06 20:36:20,898 INFO L226 Difference]: Without dead ends: 133 [2021-08-06 20:36:20,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 290.2ms TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:36:20,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-06 20:36:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2021-08-06 20:36:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0769230769230769) internal successors, (140), 130 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 140 transitions. [2021-08-06 20:36:20,900 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 140 transitions. Word has length 67 [2021-08-06 20:36:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:20,900 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 140 transitions. [2021-08-06 20:36:20,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 140 transitions. [2021-08-06 20:36:20,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-06 20:36:20,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:20,901 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:20,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:21,119 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 [2021-08-06 20:36:21,119 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:21,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1569136108, now seen corresponding path program 29 times [2021-08-06 20:36:21,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:21,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935989656] [2021-08-06 20:36:21,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:21,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:21,500 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:36:21,502 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:36:21,527 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:21,529 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:21,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:21,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935989656] [2021-08-06 20:36:21,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935989656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:21,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460409783] [2021-08-06 20:36:21,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:36:21,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:21,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:21,589 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) [2021-08-06 20:36:21,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 20:36:22,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 20:36:22,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:22,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 20:36:22,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:23,783 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:36:23,783 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 59 treesize of output 33 [2021-08-06 20:36:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:23,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460409783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:23,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:23,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2021-08-06 20:36:23,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701039417] [2021-08-06 20:36:23,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 20:36:23,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:23,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 20:36:23,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:36:23,819 INFO L87 Difference]: Start difference. First operand 131 states and 140 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 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) [2021-08-06 20:36:24,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:24,163 INFO L93 Difference]: Finished difference Result 238 states and 257 transitions. [2021-08-06 20:36:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:36:24,164 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-06 20:36:24,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:24,165 INFO L225 Difference]: With dead ends: 238 [2021-08-06 20:36:24,165 INFO L226 Difference]: Without dead ends: 223 [2021-08-06 20:36:24,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 667.0ms TimeCoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:36:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-06 20:36:24,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 139. [2021-08-06 20:36:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0869565217391304) internal successors, (150), 138 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2021-08-06 20:36:24,167 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 70 [2021-08-06 20:36:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:24,168 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2021-08-06 20:36:24,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 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) [2021-08-06 20:36:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2021-08-06 20:36:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-06 20:36:24,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:24,168 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:24,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:24,368 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 [2021-08-06 20:36:24,369 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:24,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:24,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1085338322, now seen corresponding path program 30 times [2021-08-06 20:36:24,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:24,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382506414] [2021-08-06 20:36:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:24,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:24,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:24,561 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:24,583 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:24,585 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:24,608 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:24,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:24,635 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:24,638 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:24,662 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:24,664 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:24,691 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:24,693 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:24,724 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:24,728 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:24,761 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:24,764 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:24,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:24,796 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:24,826 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:24,829 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:24,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:24,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382506414] [2021-08-06 20:36:24,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382506414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:24,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370786195] [2021-08-06 20:36:24,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:36:24,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:24,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:24,896 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) [2021-08-06 20:36:24,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 20:36:25,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 20:36:25,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:25,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 20:36:25,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:27,008 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:36:27,009 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 61 treesize of output 33 [2021-08-06 20:36:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:27,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370786195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:27,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:27,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 35 [2021-08-06 20:36:27,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364829694] [2021-08-06 20:36:27,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:36:27,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:27,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:36:27,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:36:27,040 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 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) [2021-08-06 20:36:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:27,777 INFO L93 Difference]: Finished difference Result 260 states and 283 transitions. [2021-08-06 20:36:27,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:36:27,778 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-06 20:36:27,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:27,778 INFO L225 Difference]: With dead ends: 260 [2021-08-06 20:36:27,778 INFO L226 Difference]: Without dead ends: 245 [2021-08-06 20:36:27,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 940.3ms TimeCoverageRelationStatistics Valid=168, Invalid=1994, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:36:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-06 20:36:27,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 149. [2021-08-06 20:36:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.087837837837838) internal successors, (161), 148 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 161 transitions. [2021-08-06 20:36:27,781 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 161 transitions. Word has length 70 [2021-08-06 20:36:27,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:27,781 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 161 transitions. [2021-08-06 20:36:27,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 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) [2021-08-06 20:36:27,781 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 161 transitions. [2021-08-06 20:36:27,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-06 20:36:27,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:27,782 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:27,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:27,992 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 [2021-08-06 20:36:27,993 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:27,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:27,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1285897350, now seen corresponding path program 31 times [2021-08-06 20:36:27,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:27,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473117776] [2021-08-06 20:36:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:27,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 92 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:28,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:28,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473117776] [2021-08-06 20:36:28,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473117776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:28,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902971953] [2021-08-06 20:36:28,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:36:28,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:28,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:28,185 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) [2021-08-06 20:36:28,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 20:36:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:29,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:36:29,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 92 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:29,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902971953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:29,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:29,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2021-08-06 20:36:29,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206254886] [2021-08-06 20:36:29,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:36:29,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:29,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:36:29,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:36:29,833 INFO L87 Difference]: Start difference. First operand 149 states and 161 transitions. Second operand has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:30,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:30,016 INFO L93 Difference]: Finished difference Result 258 states and 276 transitions. [2021-08-06 20:36:30,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:36:30,016 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-08-06 20:36:30,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:30,017 INFO L225 Difference]: With dead ends: 258 [2021-08-06 20:36:30,017 INFO L226 Difference]: Without dead ends: 258 [2021-08-06 20:36:30,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=519, Invalid=1203, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:36:30,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-08-06 20:36:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 140. [2021-08-06 20:36:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0719424460431655) internal successors, (149), 139 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:30,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions. [2021-08-06 20:36:30,020 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 73 [2021-08-06 20:36:30,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:30,020 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 149 transitions. [2021-08-06 20:36:30,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:30,020 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions. [2021-08-06 20:36:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-06 20:36:30,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:30,020 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:30,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:30,239 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 [2021-08-06 20:36:30,239 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1640923902, now seen corresponding path program 32 times [2021-08-06 20:36:30,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:30,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133621164] [2021-08-06 20:36:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:30,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 117 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:30,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:30,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133621164] [2021-08-06 20:36:30,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133621164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:30,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971171729] [2021-08-06 20:36:30,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:36:30,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:30,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:30,411 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) [2021-08-06 20:36:30,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 20:36:31,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:36:31,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:31,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:36:31,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 117 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:32,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971171729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:32,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:32,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2021-08-06 20:36:32,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282396583] [2021-08-06 20:36:32,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:36:32,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:32,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:36:32,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:36:32,056 INFO L87 Difference]: Start difference. First operand 140 states and 149 transitions. Second operand has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:32,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:32,233 INFO L93 Difference]: Finished difference Result 226 states and 235 transitions. [2021-08-06 20:36:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:36:32,234 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-08-06 20:36:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:32,234 INFO L225 Difference]: With dead ends: 226 [2021-08-06 20:36:32,234 INFO L226 Difference]: Without dead ends: 145 [2021-08-06 20:36:32,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=394, Invalid=1166, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:36:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-06 20:36:32,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2021-08-06 20:36:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0704225352112675) internal successors, (152), 142 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2021-08-06 20:36:32,236 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 73 [2021-08-06 20:36:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:32,236 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2021-08-06 20:36:32,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:32,237 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2021-08-06 20:36:32,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-06 20:36:32,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:32,237 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:32,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 20:36:32,456 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 [2021-08-06 20:36:32,457 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:32,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1009146332, now seen corresponding path program 33 times [2021-08-06 20:36:32,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:32,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250482502] [2021-08-06 20:36:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:32,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:32,872 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:36:32,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:36:32,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:32,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:32,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:32,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250482502] [2021-08-06 20:36:32,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250482502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:32,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389166578] [2021-08-06 20:36:32,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:36:32,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:32,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:32,959 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) [2021-08-06 20:36:32,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 20:36:34,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-06 20:36:34,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:34,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-06 20:36:34,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:35,434 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:36:35,435 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 59 treesize of output 33 [2021-08-06 20:36:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:35,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389166578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:35,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:35,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2021-08-06 20:36:35,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825557357] [2021-08-06 20:36:35,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 20:36:35,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:35,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 20:36:35,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:36:35,466 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:35,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:35,908 INFO L93 Difference]: Finished difference Result 259 states and 278 transitions. [2021-08-06 20:36:35,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:36:35,909 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-06 20:36:35,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:35,909 INFO L225 Difference]: With dead ends: 259 [2021-08-06 20:36:35,909 INFO L226 Difference]: Without dead ends: 244 [2021-08-06 20:36:35,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 758.8ms TimeCoverageRelationStatistics Valid=135, Invalid=1425, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:36:35,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-06 20:36:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 151. [2021-08-06 20:36:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.08) internal successors, (162), 150 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2021-08-06 20:36:35,912 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 76 [2021-08-06 20:36:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:35,912 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2021-08-06 20:36:35,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2021-08-06 20:36:35,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-06 20:36:35,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:35,913 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:35,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:36,120 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 [2021-08-06 20:36:36,121 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1997224948, now seen corresponding path program 34 times [2021-08-06 20:36:36,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:36,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988437762] [2021-08-06 20:36:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:36,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:36,306 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:36,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:36,332 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,334 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,358 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,360 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,385 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,387 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,413 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,415 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,442 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,444 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,472 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,474 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,506 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,537 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,539 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:36,571 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:36,574 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:36,607 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:36,609 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:36,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:36,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988437762] [2021-08-06 20:36:36,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988437762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:36,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343807316] [2021-08-06 20:36:36,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:36:36,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:36,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:36,687 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) [2021-08-06 20:36:36,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 20:36:38,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:36:38,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:38,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-06 20:36:38,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:39,193 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:36:39,193 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 52 treesize of output 37 [2021-08-06 20:36:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:39,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343807316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:39,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:39,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2021-08-06 20:36:39,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967279876] [2021-08-06 20:36:39,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 20:36:39,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:39,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 20:36:39,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:36:39,221 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand has 37 states, 37 states have (on average 3.0) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:39,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:39,504 INFO L93 Difference]: Finished difference Result 266 states and 286 transitions. [2021-08-06 20:36:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:36:39,504 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.0) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-06 20:36:39,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:39,505 INFO L225 Difference]: With dead ends: 266 [2021-08-06 20:36:39,505 INFO L226 Difference]: Without dead ends: 251 [2021-08-06 20:36:39,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 650.6ms TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:36:39,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-06 20:36:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 161. [2021-08-06 20:36:39,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.08125) internal successors, (173), 160 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 173 transitions. [2021-08-06 20:36:39,526 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 173 transitions. Word has length 76 [2021-08-06 20:36:39,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:39,526 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 173 transitions. [2021-08-06 20:36:39,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.0) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 173 transitions. [2021-08-06 20:36:39,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-06 20:36:39,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:39,527 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:39,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:39,727 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 [2021-08-06 20:36:39,728 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:39,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:39,728 INFO L82 PathProgramCache]: Analyzing trace with hash 837347646, now seen corresponding path program 35 times [2021-08-06 20:36:39,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:39,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685925332] [2021-08-06 20:36:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:39,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 117 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:39,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:39,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685925332] [2021-08-06 20:36:39,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685925332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:39,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780488168] [2021-08-06 20:36:39,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:36:39,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:39,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:39,943 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) [2021-08-06 20:36:39,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 20:36:41,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-06 20:36:41,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:41,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 20:36:41,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 117 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:41,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780488168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:41,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:41,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2021-08-06 20:36:41,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368797840] [2021-08-06 20:36:41,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 20:36:41,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:41,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 20:36:41,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:36:41,847 INFO L87 Difference]: Start difference. First operand 161 states and 173 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:42,085 INFO L93 Difference]: Finished difference Result 279 states and 297 transitions. [2021-08-06 20:36:42,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:36:42,085 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-08-06 20:36:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:42,086 INFO L225 Difference]: With dead ends: 279 [2021-08-06 20:36:42,086 INFO L226 Difference]: Without dead ends: 279 [2021-08-06 20:36:42,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=620, Invalid=1450, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:36:42,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-06 20:36:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 152. [2021-08-06 20:36:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0662251655629138) internal successors, (161), 151 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 161 transitions. [2021-08-06 20:36:42,088 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 161 transitions. Word has length 79 [2021-08-06 20:36:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:42,089 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 161 transitions. [2021-08-06 20:36:42,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 161 transitions. [2021-08-06 20:36:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-06 20:36:42,089 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:42,089 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:42,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:42,309 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 [2021-08-06 20:36:42,309 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:42,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:42,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1071091770, now seen corresponding path program 36 times [2021-08-06 20:36:42,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:42,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032676111] [2021-08-06 20:36:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:42,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 145 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:42,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:42,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032676111] [2021-08-06 20:36:42,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032676111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:42,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430529971] [2021-08-06 20:36:42,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:36:42,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:42,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:42,518 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) [2021-08-06 20:36:42,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 20:36:43,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-06 20:36:43,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:43,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 20:36:43,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 145 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:44,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430529971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:44,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:44,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2021-08-06 20:36:44,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896430761] [2021-08-06 20:36:44,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 20:36:44,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:44,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 20:36:44,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:36:44,530 INFO L87 Difference]: Start difference. First operand 152 states and 161 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:44,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:44,726 INFO L93 Difference]: Finished difference Result 247 states and 256 transitions. [2021-08-06 20:36:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:36:44,726 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-08-06 20:36:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:44,727 INFO L225 Difference]: With dead ends: 247 [2021-08-06 20:36:44,727 INFO L226 Difference]: Without dead ends: 157 [2021-08-06 20:36:44,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 424.6ms TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:36:44,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-06 20:36:44,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2021-08-06 20:36:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0649350649350648) internal successors, (164), 154 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) [2021-08-06 20:36:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 164 transitions. [2021-08-06 20:36:44,729 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 164 transitions. Word has length 79 [2021-08-06 20:36:44,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:44,729 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 164 transitions. [2021-08-06 20:36:44,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:44,729 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 164 transitions. [2021-08-06 20:36:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-06 20:36:44,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:44,730 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:44,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:44,950 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 [2021-08-06 20:36:44,950 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:44,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:44,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2110120340, now seen corresponding path program 37 times [2021-08-06 20:36:44,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:44,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134640458] [2021-08-06 20:36:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:44,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:45,434 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:36:45,436 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:36:45,466 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:45,468 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:45,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:45,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134640458] [2021-08-06 20:36:45,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134640458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:45,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413045368] [2021-08-06 20:36:45,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:36:45,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:45,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:45,526 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) [2021-08-06 20:36:45,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 20:36:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:46,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-06 20:36:46,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:48,341 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:36:48,341 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 59 treesize of output 33 [2021-08-06 20:36:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:48,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413045368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:48,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:48,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2021-08-06 20:36:48,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382752914] [2021-08-06 20:36:48,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 20:36:48,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:48,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 20:36:48,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1505, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:36:48,372 INFO L87 Difference]: Start difference. First operand 155 states and 164 transitions. Second operand has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:48,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:48,802 INFO L93 Difference]: Finished difference Result 280 states and 299 transitions. [2021-08-06 20:36:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:36:48,803 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-08-06 20:36:48,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:48,804 INFO L225 Difference]: With dead ends: 280 [2021-08-06 20:36:48,804 INFO L226 Difference]: Without dead ends: 265 [2021-08-06 20:36:48,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 874.9ms TimeCoverageRelationStatistics Valid=146, Invalid=1660, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:36:48,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-06 20:36:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 163. [2021-08-06 20:36:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0740740740740742) internal successors, (174), 162 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 174 transitions. [2021-08-06 20:36:48,806 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 174 transitions. Word has length 82 [2021-08-06 20:36:48,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:48,806 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 174 transitions. [2021-08-06 20:36:48,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:48,806 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 174 transitions. [2021-08-06 20:36:48,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-06 20:36:48,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:48,807 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:48,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:49,007 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 [2021-08-06 20:36:49,007 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:49,008 INFO L82 PathProgramCache]: Analyzing trace with hash -340372718, now seen corresponding path program 38 times [2021-08-06 20:36:49,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:49,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256091287] [2021-08-06 20:36:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:49,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:49,238 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:49,241 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:49,264 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,267 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,291 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,294 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,320 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,322 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,354 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,357 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,391 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,393 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,422 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,424 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,457 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,488 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,491 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,525 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,528 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:36:49,562 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:49,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:36:49,600 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:49,602 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:36:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:49,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:49,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256091287] [2021-08-06 20:36:49,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256091287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:49,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385342701] [2021-08-06 20:36:49,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:36:49,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:49,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:49,683 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) [2021-08-06 20:36:49,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 20:36:51,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:36:51,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:51,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-06 20:36:51,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:52,645 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:36:52,645 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 52 treesize of output 37 [2021-08-06 20:36:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:52,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385342701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:52,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:52,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2021-08-06 20:36:52,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878205222] [2021-08-06 20:36:52,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-06 20:36:52,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:52,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-06 20:36:52,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:36:52,683 INFO L87 Difference]: Start difference. First operand 163 states and 174 transitions. Second operand has 40 states, 40 states have (on average 3.0) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:53,116 INFO L93 Difference]: Finished difference Result 287 states and 307 transitions. [2021-08-06 20:36:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:36:53,116 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.0) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-08-06 20:36:53,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:53,117 INFO L225 Difference]: With dead ends: 287 [2021-08-06 20:36:53,117 INFO L226 Difference]: Without dead ends: 272 [2021-08-06 20:36:53,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 823.2ms TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:36:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-06 20:36:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 173. [2021-08-06 20:36:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0755813953488371) internal successors, (185), 172 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) [2021-08-06 20:36:53,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 185 transitions. [2021-08-06 20:36:53,120 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 185 transitions. Word has length 82 [2021-08-06 20:36:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:53,120 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 185 transitions. [2021-08-06 20:36:53,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.0) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 185 transitions. [2021-08-06 20:36:53,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-06 20:36:53,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:53,120 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:53,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:53,321 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 [2021-08-06 20:36:53,321 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:53,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:53,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1980946938, now seen corresponding path program 39 times [2021-08-06 20:36:53,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:53,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604495268] [2021-08-06 20:36:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:53,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 145 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:53,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:53,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604495268] [2021-08-06 20:36:53,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604495268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:53,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721152981] [2021-08-06 20:36:53,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:36:53,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:53,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:53,648 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) [2021-08-06 20:36:53,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 20:36:55,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-06 20:36:55,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:55,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:36:55,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 145 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:55,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721152981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:55,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:55,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2021-08-06 20:36:55,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290885883] [2021-08-06 20:36:55,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:36:55,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:55,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:36:55,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:36:55,782 INFO L87 Difference]: Start difference. First operand 173 states and 185 transitions. Second operand has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:56,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:56,063 INFO L93 Difference]: Finished difference Result 300 states and 318 transitions. [2021-08-06 20:36:56,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:36:56,063 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-06 20:36:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:56,064 INFO L225 Difference]: With dead ends: 300 [2021-08-06 20:36:56,064 INFO L226 Difference]: Without dead ends: 300 [2021-08-06 20:36:56,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 507.4ms TimeCoverageRelationStatistics Valid=730, Invalid=1720, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 20:36:56,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-08-06 20:36:56,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 164. [2021-08-06 20:36:56,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0613496932515338) internal successors, (173), 163 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 173 transitions. [2021-08-06 20:36:56,066 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 173 transitions. Word has length 85 [2021-08-06 20:36:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:56,067 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 173 transitions. [2021-08-06 20:36:56,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 173 transitions. [2021-08-06 20:36:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-06 20:36:56,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:56,067 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:56,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:56,288 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 [2021-08-06 20:36:56,288 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:56,288 INFO L82 PathProgramCache]: Analyzing trace with hash 477475454, now seen corresponding path program 40 times [2021-08-06 20:36:56,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:56,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434823437] [2021-08-06 20:36:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:56,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 176 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:56,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:56,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434823437] [2021-08-06 20:36:56,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434823437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:56,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672197309] [2021-08-06 20:36:56,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:36:56,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:56,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:56,593 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) [2021-08-06 20:36:56,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 20:36:58,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:36:58,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:58,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:36:58,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 176 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:58,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672197309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:58,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:58,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2021-08-06 20:36:58,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200776512] [2021-08-06 20:36:58,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:36:58,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:58,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:36:58,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:36:58,950 INFO L87 Difference]: Start difference. First operand 164 states and 173 transitions. Second operand has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:59,149 INFO L93 Difference]: Finished difference Result 268 states and 277 transitions. [2021-08-06 20:36:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:36:59,149 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-06 20:36:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:59,150 INFO L225 Difference]: With dead ends: 268 [2021-08-06 20:36:59,150 INFO L226 Difference]: Without dead ends: 169 [2021-08-06 20:36:59,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 523.4ms TimeCoverageRelationStatistics Valid=557, Invalid=1699, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:36:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-06 20:36:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-08-06 20:36:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0602409638554218) internal successors, (176), 166 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions. [2021-08-06 20:36:59,165 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 85 [2021-08-06 20:36:59,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:59,165 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 176 transitions. [2021-08-06 20:36:59,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:59,165 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions. [2021-08-06 20:36:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-06 20:36:59,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:59,166 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:59,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:59,366 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 [2021-08-06 20:36:59,367 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:59,367 INFO L82 PathProgramCache]: Analyzing trace with hash 391597220, now seen corresponding path program 41 times [2021-08-06 20:36:59,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:59,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053757635] [2021-08-06 20:36:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:59,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:59,991 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:36:59,992 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:37:00,024 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:37:00,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:37:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:00,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:00,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053757635] [2021-08-06 20:37:00,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053757635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:00,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786299925] [2021-08-06 20:37:00,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:37:00,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:00,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:00,086 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) [2021-08-06 20:37:00,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 20:37:01,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-06 20:37:01,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:01,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-06 20:37:01,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:03,454 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:37:03,454 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 65 treesize of output 39 [2021-08-06 20:37:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:03,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786299925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:03,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:03,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2021-08-06 20:37:03,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986192343] [2021-08-06 20:37:03,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 20:37:03,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:03,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 20:37:03,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1746, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:37:03,492 INFO L87 Difference]: Start difference. First operand 167 states and 176 transitions. Second operand has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:03,954 INFO L93 Difference]: Finished difference Result 301 states and 320 transitions. [2021-08-06 20:37:03,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:37:03,955 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-08-06 20:37:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:03,956 INFO L225 Difference]: With dead ends: 301 [2021-08-06 20:37:03,956 INFO L226 Difference]: Without dead ends: 286 [2021-08-06 20:37:03,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1088.2ms TimeCoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:37:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-06 20:37:03,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 175. [2021-08-06 20:37:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0689655172413792) internal successors, (186), 174 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:03,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 186 transitions. [2021-08-06 20:37:03,958 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 186 transitions. Word has length 88 [2021-08-06 20:37:03,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:03,958 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 186 transitions. [2021-08-06 20:37:03,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:03,958 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 186 transitions. [2021-08-06 20:37:03,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-06 20:37:03,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:03,959 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:03,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 20:37:04,159 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 [2021-08-06 20:37:04,159 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:04,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:04,160 INFO L82 PathProgramCache]: Analyzing trace with hash -159552844, now seen corresponding path program 42 times [2021-08-06 20:37:04,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:04,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784551533] [2021-08-06 20:37:04,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:04,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:04,390 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:37:04,393 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:37:04,417 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,419 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,444 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,446 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,472 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,474 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,502 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,504 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,532 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,535 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,565 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,567 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,597 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,599 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,631 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,634 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,667 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,670 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,704 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,707 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:04,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:37:04,746 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:37:04,783 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:37:04,785 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:37:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:04,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:04,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784551533] [2021-08-06 20:37:04,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784551533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:04,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902073714] [2021-08-06 20:37:04,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:37:04,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:04,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:04,899 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) [2021-08-06 20:37:04,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 20:37:06,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-06 20:37:06,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:06,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-06 20:37:06,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:08,216 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:37:08,216 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 56 treesize of output 41 [2021-08-06 20:37:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:08,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902073714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:08,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:08,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2021-08-06 20:37:08,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082368019] [2021-08-06 20:37:08,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:37:08,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:08,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:37:08,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1687, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:37:08,250 INFO L87 Difference]: Start difference. First operand 175 states and 186 transitions. Second operand has 43 states, 43 states have (on average 3.0) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:08,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:08,721 INFO L93 Difference]: Finished difference Result 308 states and 328 transitions. [2021-08-06 20:37:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:37:08,721 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-08-06 20:37:08,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:08,722 INFO L225 Difference]: With dead ends: 308 [2021-08-06 20:37:08,722 INFO L226 Difference]: Without dead ends: 293 [2021-08-06 20:37:08,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 928.6ms TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:37:08,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-08-06 20:37:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 185. [2021-08-06 20:37:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0706521739130435) internal successors, (197), 184 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) [2021-08-06 20:37:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 197 transitions. [2021-08-06 20:37:08,724 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 197 transitions. Word has length 88 [2021-08-06 20:37:08,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:08,724 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 197 transitions. [2021-08-06 20:37:08,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 197 transitions. [2021-08-06 20:37:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-06 20:37:08,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:08,725 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:08,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:08,925 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 [2021-08-06 20:37:08,925 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:08,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1793636542, now seen corresponding path program 43 times [2021-08-06 20:37:08,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:08,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556713771] [2021-08-06 20:37:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:08,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 176 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:09,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:09,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556713771] [2021-08-06 20:37:09,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556713771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:09,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623112778] [2021-08-06 20:37:09,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:37:09,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:09,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:09,204 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) [2021-08-06 20:37:09,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 20:37:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:11,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:37:11,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 176 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:11,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623112778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:11,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:11,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2021-08-06 20:37:11,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811805676] [2021-08-06 20:37:11,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:37:11,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:11,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:37:11,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:37:11,800 INFO L87 Difference]: Start difference. First operand 185 states and 197 transitions. Second operand has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:12,119 INFO L93 Difference]: Finished difference Result 321 states and 339 transitions. [2021-08-06 20:37:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:37:12,119 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-08-06 20:37:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:12,120 INFO L225 Difference]: With dead ends: 321 [2021-08-06 20:37:12,120 INFO L226 Difference]: Without dead ends: 321 [2021-08-06 20:37:12,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 537.2ms TimeCoverageRelationStatistics Valid=849, Invalid=2013, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 20:37:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-06 20:37:12,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 176. [2021-08-06 20:37:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0571428571428572) internal successors, (185), 175 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) [2021-08-06 20:37:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 185 transitions. [2021-08-06 20:37:12,123 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 185 transitions. Word has length 91 [2021-08-06 20:37:12,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:12,123 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 185 transitions. [2021-08-06 20:37:12,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:12,123 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 185 transitions. [2021-08-06 20:37:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-06 20:37:12,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:12,123 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:12,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:12,341 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 [2021-08-06 20:37:12,341 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:12,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:12,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1422182074, now seen corresponding path program 44 times [2021-08-06 20:37:12,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:12,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810842657] [2021-08-06 20:37:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:12,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 210 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:12,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:12,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810842657] [2021-08-06 20:37:12,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810842657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:12,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884771880] [2021-08-06 20:37:12,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:37:12,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:12,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:12,633 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) [2021-08-06 20:37:12,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 20:37:14,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:37:14,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:14,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:37:14,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 210 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:15,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884771880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:15,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:15,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2021-08-06 20:37:15,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017798870] [2021-08-06 20:37:15,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:37:15,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:15,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:37:15,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:37:15,363 INFO L87 Difference]: Start difference. First operand 176 states and 185 transitions. Second operand has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:15,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:15,599 INFO L93 Difference]: Finished difference Result 289 states and 298 transitions. [2021-08-06 20:37:15,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:37:15,600 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-08-06 20:37:15,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:15,600 INFO L225 Difference]: With dead ends: 289 [2021-08-06 20:37:15,600 INFO L226 Difference]: Without dead ends: 181 [2021-08-06 20:37:15,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 577.8ms TimeCoverageRelationStatistics Valid=649, Invalid=2003, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 20:37:15,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-06 20:37:15,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2021-08-06 20:37:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0561797752808988) internal successors, (188), 178 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 188 transitions. [2021-08-06 20:37:15,603 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 188 transitions. Word has length 91 [2021-08-06 20:37:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:15,603 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 188 transitions. [2021-08-06 20:37:15,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 188 transitions. [2021-08-06 20:37:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-06 20:37:15,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:15,603 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:15,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:15,826 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 [2021-08-06 20:37:15,826 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:15,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:15,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1825693972, now seen corresponding path program 45 times [2021-08-06 20:37:15,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:15,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748248245] [2021-08-06 20:37:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:15,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:16,394 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:37:16,395 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:37:16,424 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:37:16,425 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:37:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:16,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:16,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748248245] [2021-08-06 20:37:16,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748248245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:16,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989547294] [2021-08-06 20:37:16,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:37:16,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:16,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:16,480 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) [2021-08-06 20:37:16,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 20:37:18,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-06 20:37:18,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:18,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-06 20:37:18,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:20,036 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:37:20,036 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 59 treesize of output 33 [2021-08-06 20:37:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:20,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989547294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:20,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:20,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2021-08-06 20:37:20,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397772816] [2021-08-06 20:37:20,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-06 20:37:20,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:20,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-06 20:37:20,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:37:20,068 INFO L87 Difference]: Start difference. First operand 179 states and 188 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:20,646 INFO L93 Difference]: Finished difference Result 322 states and 341 transitions. [2021-08-06 20:37:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:37:20,647 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-08-06 20:37:20,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:20,647 INFO L225 Difference]: With dead ends: 322 [2021-08-06 20:37:20,647 INFO L226 Difference]: Without dead ends: 307 [2021-08-06 20:37:20,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1005.7ms TimeCoverageRelationStatistics Valid=168, Invalid=2184, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 20:37:20,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-06 20:37:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 187. [2021-08-06 20:37:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.064516129032258) internal successors, (198), 186 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 198 transitions. [2021-08-06 20:37:20,650 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 198 transitions. Word has length 94 [2021-08-06 20:37:20,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:20,650 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 198 transitions. [2021-08-06 20:37:20,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:20,650 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 198 transitions. [2021-08-06 20:37:20,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-06 20:37:20,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:20,651 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:20,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:20,851 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 [2021-08-06 20:37:20,851 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash 438690642, now seen corresponding path program 46 times [2021-08-06 20:37:20,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:20,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759829302] [2021-08-06 20:37:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:20,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:21,104 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:37:21,106 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:37:21,131 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,133 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,162 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,165 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,223 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,225 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,254 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,257 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,288 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,290 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,322 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,325 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,358 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,360 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,433 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,435 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,473 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,475 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:21,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:37:21,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:37:21,557 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:37:21,559 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:37:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:21,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:21,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759829302] [2021-08-06 20:37:21,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759829302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:21,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552806848] [2021-08-06 20:37:21,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:37:21,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:21,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:21,652 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) [2021-08-06 20:37:21,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 20:37:23,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:37:23,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:23,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-06 20:37:23,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:25,482 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:37:25,482 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 52 treesize of output 37 [2021-08-06 20:37:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:25,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552806848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:25,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:25,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 45 [2021-08-06 20:37:25,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877060358] [2021-08-06 20:37:25,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-06 20:37:25,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:25,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-06 20:37:25,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1942, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:37:25,513 INFO L87 Difference]: Start difference. First operand 187 states and 198 transitions. Second operand has 46 states, 46 states have (on average 3.0) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:26,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:26,029 INFO L93 Difference]: Finished difference Result 329 states and 349 transitions. [2021-08-06 20:37:26,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:37:26,030 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-08-06 20:37:26,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:26,031 INFO L225 Difference]: With dead ends: 329 [2021-08-06 20:37:26,031 INFO L226 Difference]: Without dead ends: 314 [2021-08-06 20:37:26,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1034.4ms TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:37:26,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-08-06 20:37:26,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 197. [2021-08-06 20:37:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.066326530612245) internal successors, (209), 196 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 209 transitions. [2021-08-06 20:37:26,033 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 209 transitions. Word has length 94 [2021-08-06 20:37:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:26,033 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 209 transitions. [2021-08-06 20:37:26,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:26,034 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 209 transitions. [2021-08-06 20:37:26,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-06 20:37:26,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:26,034 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:26,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:26,240 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 [2021-08-06 20:37:26,241 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:26,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:26,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1235185786, now seen corresponding path program 47 times [2021-08-06 20:37:26,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:26,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52105935] [2021-08-06 20:37:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:26,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 210 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:26,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:26,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52105935] [2021-08-06 20:37:26,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52105935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:26,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281841495] [2021-08-06 20:37:26,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:37:26,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:26,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:26,562 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) [2021-08-06 20:37:26,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 20:37:28,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-08-06 20:37:28,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:28,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:37:28,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 210 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:29,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281841495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:29,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:29,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2021-08-06 20:37:29,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308656412] [2021-08-06 20:37:29,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-06 20:37:29,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:29,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-06 20:37:29,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:37:29,472 INFO L87 Difference]: Start difference. First operand 197 states and 209 transitions. Second operand has 42 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:29,803 INFO L93 Difference]: Finished difference Result 342 states and 360 transitions. [2021-08-06 20:37:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:37:29,803 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-08-06 20:37:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:29,804 INFO L225 Difference]: With dead ends: 342 [2021-08-06 20:37:29,804 INFO L226 Difference]: Without dead ends: 342 [2021-08-06 20:37:29,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 610.8ms TimeCoverageRelationStatistics Valid=977, Invalid=2329, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 20:37:29,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-08-06 20:37:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 188. [2021-08-06 20:37:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.053475935828877) internal successors, (197), 187 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) [2021-08-06 20:37:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 197 transitions. [2021-08-06 20:37:29,807 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 197 transitions. Word has length 97 [2021-08-06 20:37:29,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:29,807 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 197 transitions. [2021-08-06 20:37:29,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 197 transitions. [2021-08-06 20:37:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-06 20:37:29,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:29,808 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:29,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:30,030 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 [2021-08-06 20:37:30,030 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:30,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:30,030 INFO L82 PathProgramCache]: Analyzing trace with hash -147070466, now seen corresponding path program 48 times [2021-08-06 20:37:30,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:30,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656085268] [2021-08-06 20:37:30,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:30,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 247 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:30,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:30,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656085268] [2021-08-06 20:37:30,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656085268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:30,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10488536] [2021-08-06 20:37:30,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:37:30,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:30,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:30,390 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) [2021-08-06 20:37:30,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 20:37:32,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-08-06 20:37:32,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:32,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:37:32,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 247 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:33,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10488536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:33,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:33,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2021-08-06 20:37:33,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479403726] [2021-08-06 20:37:33,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-06 20:37:33,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:33,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-06 20:37:33,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:37:33,476 INFO L87 Difference]: Start difference. First operand 188 states and 197 transitions. Second operand has 42 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:33,755 INFO L93 Difference]: Finished difference Result 310 states and 319 transitions. [2021-08-06 20:37:33,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:37:33,755 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-08-06 20:37:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:33,755 INFO L225 Difference]: With dead ends: 310 [2021-08-06 20:37:33,755 INFO L226 Difference]: Without dead ends: 193 [2021-08-06 20:37:33,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 697.6ms TimeCoverageRelationStatistics Valid=748, Invalid=2332, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:37:33,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-06 20:37:33,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2021-08-06 20:37:33,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0526315789473684) internal successors, (200), 190 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 200 transitions. [2021-08-06 20:37:33,758 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 200 transitions. Word has length 97 [2021-08-06 20:37:33,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:33,758 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 200 transitions. [2021-08-06 20:37:33,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:33,758 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 200 transitions. [2021-08-06 20:37:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-06 20:37:33,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:33,758 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:33,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 20:37:33,981 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 [2021-08-06 20:37:33,981 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:33,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:33,981 INFO L82 PathProgramCache]: Analyzing trace with hash -503745756, now seen corresponding path program 49 times [2021-08-06 20:37:33,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:33,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18632801] [2021-08-06 20:37:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:33,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:34,785 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:37:34,787 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:37:34,820 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:37:34,822 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:37:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:34,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:34,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18632801] [2021-08-06 20:37:34,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18632801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:34,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376103226] [2021-08-06 20:37:34,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:37:34,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:34,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:34,880 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) [2021-08-06 20:37:34,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 20:37:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:37,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-06 20:37:37,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:39,224 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:37:39,224 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 65 treesize of output 39 [2021-08-06 20:37:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:39,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376103226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:39,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:39,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2021-08-06 20:37:39,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535908453] [2021-08-06 20:37:39,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-06 20:37:39,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:39,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-06 20:37:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2282, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 20:37:39,312 INFO L87 Difference]: Start difference. First operand 191 states and 200 transitions. Second operand has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:39,920 INFO L93 Difference]: Finished difference Result 343 states and 362 transitions. [2021-08-06 20:37:39,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:37:39,920 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-06 20:37:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:39,921 INFO L225 Difference]: With dead ends: 343 [2021-08-06 20:37:39,921 INFO L226 Difference]: Without dead ends: 328 [2021-08-06 20:37:39,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1386.7ms TimeCoverageRelationStatistics Valid=179, Invalid=2473, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 20:37:39,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-08-06 20:37:39,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 199. [2021-08-06 20:37:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.0606060606060606) internal successors, (210), 198 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 210 transitions. [2021-08-06 20:37:39,924 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 210 transitions. Word has length 100 [2021-08-06 20:37:39,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:39,924 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 210 transitions. [2021-08-06 20:37:39,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 210 transitions. [2021-08-06 20:37:39,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-06 20:37:39,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:39,925 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:39,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:40,145 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 [2021-08-06 20:37:40,145 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:40,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:40,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1357059724, now seen corresponding path program 50 times [2021-08-06 20:37:40,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:40,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890079904] [2021-08-06 20:37:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:40,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:40,456 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:37:40,458 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:37:40,479 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,481 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,505 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,528 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,530 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,553 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,555 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,580 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,606 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,633 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,635 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,662 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,664 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,728 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,730 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,757 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,788 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,795 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,824 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,826 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,857 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,859 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:37:40,904 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:37:40,918 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:37:40,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:37:40,955 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:37:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:41,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:41,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890079904] [2021-08-06 20:37:41,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890079904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:41,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300574088] [2021-08-06 20:37:41,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:37:41,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:41,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:41,031 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) [2021-08-06 20:37:41,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 20:37:43,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:37:43,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:43,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-06 20:37:43,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:45,374 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:37:45,374 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 56 treesize of output 41 [2021-08-06 20:37:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:45,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300574088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:45,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:45,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 48 [2021-08-06 20:37:45,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600528126] [2021-08-06 20:37:45,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-06 20:37:45,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:45,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-06 20:37:45,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2215, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 20:37:45,411 INFO L87 Difference]: Start difference. First operand 199 states and 210 transitions. Second operand has 49 states, 49 states have (on average 3.0) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:46,019 INFO L93 Difference]: Finished difference Result 350 states and 370 transitions. [2021-08-06 20:37:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:37:46,020 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-06 20:37:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:46,021 INFO L225 Difference]: With dead ends: 350 [2021-08-06 20:37:46,021 INFO L226 Difference]: Without dead ends: 335 [2021-08-06 20:37:46,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1199.2ms TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:37:46,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-08-06 20:37:46,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 209. [2021-08-06 20:37:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0625) internal successors, (221), 208 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 221 transitions. [2021-08-06 20:37:46,023 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 221 transitions. Word has length 100 [2021-08-06 20:37:46,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:46,023 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 221 transitions. [2021-08-06 20:37:46,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:46,024 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 221 transitions. [2021-08-06 20:37:46,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-08-06 20:37:46,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:46,024 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:46,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:46,232 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 [2021-08-06 20:37:46,233 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash -468219842, now seen corresponding path program 51 times [2021-08-06 20:37:46,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:46,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252692798] [2021-08-06 20:37:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:46,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 247 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:46,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:46,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252692798] [2021-08-06 20:37:46,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252692798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:46,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262001936] [2021-08-06 20:37:46,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:37:46,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:46,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:46,594 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) [2021-08-06 20:37:46,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 20:37:49,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-08-06 20:37:49,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:49,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 20:37:49,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 247 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:49,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262001936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:49,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:49,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 45 [2021-08-06 20:37:49,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578036822] [2021-08-06 20:37:49,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-06 20:37:49,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:49,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-06 20:37:49,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:37:49,927 INFO L87 Difference]: Start difference. First operand 209 states and 221 transitions. Second operand has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:50,293 INFO L93 Difference]: Finished difference Result 363 states and 381 transitions. [2021-08-06 20:37:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:37:50,293 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-08-06 20:37:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:50,294 INFO L225 Difference]: With dead ends: 363 [2021-08-06 20:37:50,294 INFO L226 Difference]: Without dead ends: 363 [2021-08-06 20:37:50,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 734.8ms TimeCoverageRelationStatistics Valid=1114, Invalid=2668, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 20:37:50,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-08-06 20:37:50,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 200. [2021-08-06 20:37:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.050251256281407) internal successors, (209), 199 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 209 transitions. [2021-08-06 20:37:50,297 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 209 transitions. Word has length 103 [2021-08-06 20:37:50,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:50,297 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 209 transitions. [2021-08-06 20:37:50,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:50,297 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 209 transitions. [2021-08-06 20:37:50,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-08-06 20:37:50,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:50,298 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:50,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 20:37:50,512 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 [2021-08-06 20:37:50,513 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:50,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:50,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1457095366, now seen corresponding path program 52 times [2021-08-06 20:37:50,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:50,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975789557] [2021-08-06 20:37:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:50,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 287 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:50,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:50,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975789557] [2021-08-06 20:37:50,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975789557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:50,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723733819] [2021-08-06 20:37:50,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:37:50,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:50,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:50,873 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) [2021-08-06 20:37:50,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 20:37:53,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:37:53,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:53,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 20:37:53,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 287 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:54,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723733819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:54,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:54,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 45 [2021-08-06 20:37:54,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263592731] [2021-08-06 20:37:54,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-06 20:37:54,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:54,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-06 20:37:54,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:37:54,382 INFO L87 Difference]: Start difference. First operand 200 states and 209 transitions. Second operand has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:54,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:54,699 INFO L93 Difference]: Finished difference Result 331 states and 340 transitions. [2021-08-06 20:37:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:37:54,700 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-08-06 20:37:54,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:54,700 INFO L225 Difference]: With dead ends: 331 [2021-08-06 20:37:54,701 INFO L226 Difference]: Without dead ends: 205 [2021-08-06 20:37:54,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 786.3ms TimeCoverageRelationStatistics Valid=854, Invalid=2686, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 20:37:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-06 20:37:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2021-08-06 20:37:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0495049504950495) internal successors, (212), 202 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 212 transitions. [2021-08-06 20:37:54,705 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 212 transitions. Word has length 103 [2021-08-06 20:37:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:54,705 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 212 transitions. [2021-08-06 20:37:54,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 212 transitions. [2021-08-06 20:37:54,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-06 20:37:54,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:54,721 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:54,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:54,921 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 [2021-08-06 20:37:54,921 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:54,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1047322772, now seen corresponding path program 53 times [2021-08-06 20:37:54,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:54,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221256788] [2021-08-06 20:37:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:54,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:55,645 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:37:55,646 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:37:55,673 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:37:55,674 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:37:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:55,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:55,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221256788] [2021-08-06 20:37:55,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221256788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:55,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359222304] [2021-08-06 20:37:55,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:37:55,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:55,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:55,726 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) [2021-08-06 20:37:55,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 20:37:58,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-08-06 20:37:58,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:58,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-06 20:37:58,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:00,421 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:38:00,421 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 59 treesize of output 33 [2021-08-06 20:38:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:00,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359222304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:00,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:00,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2021-08-06 20:38:00,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704894373] [2021-08-06 20:38:00,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-06 20:38:00,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-06 20:38:00,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2577, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 20:38:00,450 INFO L87 Difference]: Start difference. First operand 203 states and 212 transitions. Second operand has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:01,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:01,009 INFO L93 Difference]: Finished difference Result 364 states and 383 transitions. [2021-08-06 20:38:01,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:38:01,010 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-08-06 20:38:01,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:01,010 INFO L225 Difference]: With dead ends: 364 [2021-08-06 20:38:01,011 INFO L226 Difference]: Without dead ends: 349 [2021-08-06 20:38:01,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1368.1ms TimeCoverageRelationStatistics Valid=190, Invalid=2780, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:38:01,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-08-06 20:38:01,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 211. [2021-08-06 20:38:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.0571428571428572) internal successors, (222), 210 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 222 transitions. [2021-08-06 20:38:01,013 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 222 transitions. Word has length 106 [2021-08-06 20:38:01,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:01,013 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 222 transitions. [2021-08-06 20:38:01,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 222 transitions. [2021-08-06 20:38:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-06 20:38:01,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:01,014 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:01,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:01,228 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 [2021-08-06 20:38:01,229 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:01,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1703650194, now seen corresponding path program 54 times [2021-08-06 20:38:01,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:01,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33368934] [2021-08-06 20:38:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:01,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:01,508 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:38:01,510 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:38:01,531 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,533 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,555 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,557 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,580 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,582 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,607 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,632 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,635 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,662 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,664 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,693 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,695 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,726 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,729 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,758 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,760 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,790 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,792 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,822 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,824 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,855 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,857 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,892 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:01,927 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:38:01,930 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:38:01,972 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:38:01,974 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:38:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:02,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:02,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33368934] [2021-08-06 20:38:02,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33368934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:02,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265208325] [2021-08-06 20:38:02,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:38:02,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:02,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:02,070 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) [2021-08-06 20:38:02,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 20:38:04,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-08-06 20:38:04,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:04,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-06 20:38:04,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:06,997 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:38:06,997 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 52 treesize of output 37 [2021-08-06 20:38:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:07,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265208325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:07,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:07,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 51 [2021-08-06 20:38:07,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328988002] [2021-08-06 20:38:07,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-06 20:38:07,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:07,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-06 20:38:07,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2506, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 20:38:07,033 INFO L87 Difference]: Start difference. First operand 211 states and 222 transitions. Second operand has 52 states, 52 states have (on average 3.0) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:07,640 INFO L93 Difference]: Finished difference Result 371 states and 391 transitions. [2021-08-06 20:38:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:38:07,640 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-08-06 20:38:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:07,641 INFO L225 Difference]: With dead ends: 371 [2021-08-06 20:38:07,641 INFO L226 Difference]: Without dead ends: 356 [2021-08-06 20:38:07,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1178.8ms TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 20:38:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-08-06 20:38:07,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 221. [2021-08-06 20:38:07,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.059090909090909) internal successors, (233), 220 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 233 transitions. [2021-08-06 20:38:07,644 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 233 transitions. Word has length 106 [2021-08-06 20:38:07,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:07,644 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 233 transitions. [2021-08-06 20:38:07,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 233 transitions. [2021-08-06 20:38:07,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-08-06 20:38:07,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:07,644 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:07,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:07,845 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 [2021-08-06 20:38:07,845 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:07,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:07,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2003794182, now seen corresponding path program 55 times [2021-08-06 20:38:07,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:07,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881502767] [2021-08-06 20:38:07,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:07,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 287 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:08,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:08,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881502767] [2021-08-06 20:38:08,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881502767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:08,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848596011] [2021-08-06 20:38:08,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:38:08,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:08,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:08,239 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) [2021-08-06 20:38:08,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 20:38:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:11,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:38:11,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 287 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:11,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848596011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:11,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:11,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 48 [2021-08-06 20:38:11,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340924923] [2021-08-06 20:38:11,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-06 20:38:11,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:11,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-06 20:38:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:38:11,809 INFO L87 Difference]: Start difference. First operand 221 states and 233 transitions. Second operand has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 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) [2021-08-06 20:38:12,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:12,152 INFO L93 Difference]: Finished difference Result 384 states and 402 transitions. [2021-08-06 20:38:12,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:38:12,156 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 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) Word has length 109 [2021-08-06 20:38:12,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:12,157 INFO L225 Difference]: With dead ends: 384 [2021-08-06 20:38:12,157 INFO L226 Difference]: Without dead ends: 384 [2021-08-06 20:38:12,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 709.8ms TimeCoverageRelationStatistics Valid=1260, Invalid=3030, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 20:38:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-08-06 20:38:12,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 212. [2021-08-06 20:38:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.04739336492891) internal successors, (221), 211 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 221 transitions. [2021-08-06 20:38:12,160 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 221 transitions. Word has length 109 [2021-08-06 20:38:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:12,160 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 221 transitions. [2021-08-06 20:38:12,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 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) [2021-08-06 20:38:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 221 transitions. [2021-08-06 20:38:12,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-08-06 20:38:12,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:12,161 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:12,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:12,379 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 [2021-08-06 20:38:12,380 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:12,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:12,380 INFO L82 PathProgramCache]: Analyzing trace with hash -219082370, now seen corresponding path program 56 times [2021-08-06 20:38:12,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:12,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142577991] [2021-08-06 20:38:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:12,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 330 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:12,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:12,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142577991] [2021-08-06 20:38:12,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142577991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:12,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968439043] [2021-08-06 20:38:12,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:38:12,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:12,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:12,732 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) [2021-08-06 20:38:12,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 20:38:15,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:38:15,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:15,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:38:15,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 330 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:16,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968439043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:16,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:16,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 48 [2021-08-06 20:38:16,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275576012] [2021-08-06 20:38:16,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-06 20:38:16,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:16,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-06 20:38:16,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:38:16,631 INFO L87 Difference]: Start difference. First operand 212 states and 221 transitions. Second operand has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 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) [2021-08-06 20:38:17,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:17,009 INFO L93 Difference]: Finished difference Result 352 states and 361 transitions. [2021-08-06 20:38:17,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:38:17,009 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 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) Word has length 109 [2021-08-06 20:38:17,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:17,010 INFO L225 Difference]: With dead ends: 352 [2021-08-06 20:38:17,010 INFO L226 Difference]: Without dead ends: 217 [2021-08-06 20:38:17,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 857.0ms TimeCoverageRelationStatistics Valid=967, Invalid=3065, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:38:17,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-06 20:38:17,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2021-08-06 20:38:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0467289719626167) internal successors, (224), 214 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 224 transitions. [2021-08-06 20:38:17,013 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 224 transitions. Word has length 109 [2021-08-06 20:38:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:17,013 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 224 transitions. [2021-08-06 20:38:17,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 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) [2021-08-06 20:38:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 224 transitions. [2021-08-06 20:38:17,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-08-06 20:38:17,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:17,013 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:17,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:17,231 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 [2021-08-06 20:38:17,232 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1213208996, now seen corresponding path program 57 times [2021-08-06 20:38:17,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:17,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901377531] [2021-08-06 20:38:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:17,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:18,085 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:38:18,087 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:38:18,124 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:38:18,126 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:38:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:18,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:18,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901377531] [2021-08-06 20:38:18,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901377531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:18,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197385999] [2021-08-06 20:38:18,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:38:18,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:18,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:18,197 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) [2021-08-06 20:38:18,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 20:38:21,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-06 20:38:21,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:21,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-06 20:38:21,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:23,263 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:38:23,263 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 59 treesize of output 33 [2021-08-06 20:38:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:23,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197385999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:23,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:23,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2021-08-06 20:38:23,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726988645] [2021-08-06 20:38:23,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-06 20:38:23,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:23,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-06 20:38:23,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2890, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:38:23,291 INFO L87 Difference]: Start difference. First operand 215 states and 224 transitions. Second operand has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:24,054 INFO L93 Difference]: Finished difference Result 385 states and 404 transitions. [2021-08-06 20:38:24,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:38:24,054 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-08-06 20:38:24,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:24,055 INFO L225 Difference]: With dead ends: 385 [2021-08-06 20:38:24,055 INFO L226 Difference]: Without dead ends: 370 [2021-08-06 20:38:24,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1533.3ms TimeCoverageRelationStatistics Valid=201, Invalid=3105, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 20:38:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-06 20:38:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 223. [2021-08-06 20:38:24,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.054054054054054) internal successors, (234), 222 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:24,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 234 transitions. [2021-08-06 20:38:24,058 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 234 transitions. Word has length 112 [2021-08-06 20:38:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:24,058 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 234 transitions. [2021-08-06 20:38:24,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 234 transitions. [2021-08-06 20:38:24,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-08-06 20:38:24,058 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:24,058 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:24,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:24,267 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 [2021-08-06 20:38:24,267 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:24,267 INFO L82 PathProgramCache]: Analyzing trace with hash 798865460, now seen corresponding path program 58 times [2021-08-06 20:38:24,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:24,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453314846] [2021-08-06 20:38:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:24,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:24,611 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:38:24,614 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:38:24,640 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,673 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,676 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,710 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,713 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,777 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,814 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,847 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,883 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,886 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,926 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,929 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,968 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:24,971 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:25,012 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:25,015 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:25,054 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:25,057 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:25,097 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:25,100 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:25,142 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:25,145 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:25,189 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:38:25,192 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:38:25,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:38:25,239 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:38:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:25,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:25,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453314846] [2021-08-06 20:38:25,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453314846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:25,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645072309] [2021-08-06 20:38:25,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:38:25,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:25,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:25,342 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) [2021-08-06 20:38:25,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 20:38:28,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:38:28,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:28,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-06 20:38:28,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:30,513 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:38:30,513 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 52 treesize of output 37 [2021-08-06 20:38:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:30,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645072309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:30,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:30,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2021-08-06 20:38:30,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373046784] [2021-08-06 20:38:30,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-06 20:38:30,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:30,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-06 20:38:30,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2815, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:38:30,541 INFO L87 Difference]: Start difference. First operand 223 states and 234 transitions. Second operand has 55 states, 55 states have (on average 3.0) internal successors, (165), 54 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:31,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:31,319 INFO L93 Difference]: Finished difference Result 392 states and 412 transitions. [2021-08-06 20:38:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:38:31,320 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.0) internal successors, (165), 54 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-08-06 20:38:31,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:31,321 INFO L225 Difference]: With dead ends: 392 [2021-08-06 20:38:31,321 INFO L226 Difference]: Without dead ends: 377 [2021-08-06 20:38:31,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1381.7ms TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 20:38:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-08-06 20:38:31,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 233. [2021-08-06 20:38:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0560344827586208) internal successors, (245), 232 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 245 transitions. [2021-08-06 20:38:31,323 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 245 transitions. Word has length 112 [2021-08-06 20:38:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:31,323 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 245 transitions. [2021-08-06 20:38:31,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.0) internal successors, (165), 54 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:31,325 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 245 transitions. [2021-08-06 20:38:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-06 20:38:31,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:31,326 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:31,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:31,540 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 [2021-08-06 20:38:31,541 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:31,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:31,541 INFO L82 PathProgramCache]: Analyzing trace with hash 105207742, now seen corresponding path program 59 times [2021-08-06 20:38:31,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:31,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893749978] [2021-08-06 20:38:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:31,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 330 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:32,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:32,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893749978] [2021-08-06 20:38:32,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893749978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:32,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823848718] [2021-08-06 20:38:32,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:38:32,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:32,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:32,013 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) [2021-08-06 20:38:32,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 20:38:35,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-06 20:38:35,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:35,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:38:35,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 330 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:35,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823848718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:35,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:35,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 51 [2021-08-06 20:38:35,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920889467] [2021-08-06 20:38:35,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-06 20:38:35,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:35,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-06 20:38:35,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:38:35,934 INFO L87 Difference]: Start difference. First operand 233 states and 245 transitions. Second operand has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:36,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:36,420 INFO L93 Difference]: Finished difference Result 405 states and 423 transitions. [2021-08-06 20:38:36,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:38:36,420 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-08-06 20:38:36,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:36,421 INFO L225 Difference]: With dead ends: 405 [2021-08-06 20:38:36,421 INFO L226 Difference]: Without dead ends: 405 [2021-08-06 20:38:36,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 886.6ms TimeCoverageRelationStatistics Valid=1415, Invalid=3415, Unknown=0, NotChecked=0, Total=4830 [2021-08-06 20:38:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-08-06 20:38:36,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 224. [2021-08-06 20:38:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0448430493273542) internal successors, (233), 223 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 233 transitions. [2021-08-06 20:38:36,424 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 233 transitions. Word has length 115 [2021-08-06 20:38:36,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:36,424 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 233 transitions. [2021-08-06 20:38:36,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 233 transitions. [2021-08-06 20:38:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-06 20:38:36,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:36,424 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:36,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:36,639 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 [2021-08-06 20:38:36,639 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:36,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:36,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1804383162, now seen corresponding path program 60 times [2021-08-06 20:38:36,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:36,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600063465] [2021-08-06 20:38:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:36,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 376 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:37,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:37,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600063465] [2021-08-06 20:38:37,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600063465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:37,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653806656] [2021-08-06 20:38:37,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:38:37,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:37,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:37,086 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) [2021-08-06 20:38:37,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 20:38:40,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-08-06 20:38:40,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:40,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:38:40,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 376 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:41,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653806656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:41,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:41,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 51 [2021-08-06 20:38:41,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855674892] [2021-08-06 20:38:41,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-06 20:38:41,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:41,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-06 20:38:41,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:38:41,312 INFO L87 Difference]: Start difference. First operand 224 states and 233 transitions. Second operand has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:41,762 INFO L93 Difference]: Finished difference Result 373 states and 382 transitions. [2021-08-06 20:38:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 20:38:41,762 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-08-06 20:38:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:41,763 INFO L225 Difference]: With dead ends: 373 [2021-08-06 20:38:41,763 INFO L226 Difference]: Without dead ends: 229 [2021-08-06 20:38:41,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 991.7ms TimeCoverageRelationStatistics Valid=1087, Invalid=3469, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 20:38:41,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-08-06 20:38:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2021-08-06 20:38:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0442477876106195) internal successors, (236), 226 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 236 transitions. [2021-08-06 20:38:41,765 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 236 transitions. Word has length 115 [2021-08-06 20:38:41,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:41,765 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 236 transitions. [2021-08-06 20:38:41,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:41,765 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 236 transitions. [2021-08-06 20:38:41,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-06 20:38:41,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:41,766 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:41,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:41,987 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 [2021-08-06 20:38:41,987 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:41,987 INFO L82 PathProgramCache]: Analyzing trace with hash 848895980, now seen corresponding path program 61 times [2021-08-06 20:38:41,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:41,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000420163] [2021-08-06 20:38:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:41,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:42,978 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:38:42,980 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:38:43,019 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:38:43,021 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:38:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:43,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:43,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000420163] [2021-08-06 20:38:43,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000420163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:43,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635220474] [2021-08-06 20:38:43,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:38:43,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:43,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:43,096 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) [2021-08-06 20:38:43,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 20:38:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:46,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-06 20:38:46,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:48,862 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:38:48,862 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 65 treesize of output 39 [2021-08-06 20:38:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:48,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635220474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:48,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:48,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2021-08-06 20:38:48,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094336992] [2021-08-06 20:38:48,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-06 20:38:48,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:48,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-06 20:38:48,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3221, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:38:48,900 INFO L87 Difference]: Start difference. First operand 227 states and 236 transitions. Second operand has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:49,756 INFO L93 Difference]: Finished difference Result 406 states and 425 transitions. [2021-08-06 20:38:49,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 20:38:49,756 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-08-06 20:38:49,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:49,757 INFO L225 Difference]: With dead ends: 406 [2021-08-06 20:38:49,757 INFO L226 Difference]: Without dead ends: 391 [2021-08-06 20:38:49,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1835.3ms TimeCoverageRelationStatistics Valid=212, Invalid=3448, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 20:38:49,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-06 20:38:49,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 235. [2021-08-06 20:38:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0512820512820513) internal successors, (246), 234 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 246 transitions. [2021-08-06 20:38:49,760 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 246 transitions. Word has length 118 [2021-08-06 20:38:49,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:49,760 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 246 transitions. [2021-08-06 20:38:49,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:49,760 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 246 transitions. [2021-08-06 20:38:49,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-06 20:38:49,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:49,761 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:49,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 20:38:49,968 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 [2021-08-06 20:38:49,969 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:49,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1502374958, now seen corresponding path program 62 times [2021-08-06 20:38:49,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:49,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462220132] [2021-08-06 20:38:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:49,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:50,345 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:38:50,347 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:38:50,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,383 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,416 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,419 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,448 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,451 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,481 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,484 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,515 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,556 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,558 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,594 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,597 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,635 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,638 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,678 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,681 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,718 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,721 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,759 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,762 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,802 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,805 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,846 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,892 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,895 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,939 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,941 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:38:50,985 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:38:50,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:38:51,035 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:38:51,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:38:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:51,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:51,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462220132] [2021-08-06 20:38:51,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462220132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:51,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671957097] [2021-08-06 20:38:51,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:38:51,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:51,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:51,204 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) [2021-08-06 20:38:51,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 20:38:54,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:38:54,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:54,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-06 20:38:54,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:56,718 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:38:56,718 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 67 treesize of output 39 [2021-08-06 20:38:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:56,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671957097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:56,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:56,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40] total 59 [2021-08-06 20:38:56,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740995468] [2021-08-06 20:38:56,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-06 20:38:56,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:56,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-06 20:38:56,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3387, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 20:38:56,773 INFO L87 Difference]: Start difference. First operand 235 states and 246 transitions. Second operand has 60 states, 60 states have (on average 2.9166666666666665) internal successors, (175), 59 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:58,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:58,427 INFO L93 Difference]: Finished difference Result 428 states and 451 transitions. [2021-08-06 20:38:58,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 20:38:58,427 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.9166666666666665) internal successors, (175), 59 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-08-06 20:38:58,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:58,428 INFO L225 Difference]: With dead ends: 428 [2021-08-06 20:38:58,428 INFO L226 Difference]: Without dead ends: 413 [2021-08-06 20:38:58,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 2401.1ms TimeCoverageRelationStatistics Valid=288, Invalid=5874, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 20:38:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-06 20:38:58,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 245. [2021-08-06 20:38:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0532786885245902) internal successors, (257), 244 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 257 transitions. [2021-08-06 20:38:58,431 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 257 transitions. Word has length 118 [2021-08-06 20:38:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:58,431 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 257 transitions. [2021-08-06 20:38:58,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.9166666666666665) internal successors, (175), 59 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:58,431 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 257 transitions. [2021-08-06 20:38:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-08-06 20:38:58,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:58,432 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:58,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:58,632 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 [2021-08-06 20:38:58,632 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:58,636 INFO L82 PathProgramCache]: Analyzing trace with hash 109699718, now seen corresponding path program 63 times [2021-08-06 20:38:58,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:58,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824215475] [2021-08-06 20:38:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:58,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 376 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:59,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:59,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824215475] [2021-08-06 20:38:59,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824215475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:59,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095579353] [2021-08-06 20:38:59,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:38:59,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:59,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:59,185 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) [2021-08-06 20:38:59,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 20:39:02,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-08-06 20:39:02,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:02,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 20:39:02,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 376 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:03,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095579353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:03,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:03,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2021-08-06 20:39:03,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464412615] [2021-08-06 20:39:03,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-06 20:39:03,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:03,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-06 20:39:03,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 20:39:03,862 INFO L87 Difference]: Start difference. First operand 245 states and 257 transitions. Second operand has 54 states, 54 states have (on average 3.1666666666666665) internal successors, (171), 54 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:04,320 INFO L93 Difference]: Finished difference Result 426 states and 444 transitions. [2021-08-06 20:39:04,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:39:04,321 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.1666666666666665) internal successors, (171), 54 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-08-06 20:39:04,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:04,322 INFO L225 Difference]: With dead ends: 426 [2021-08-06 20:39:04,322 INFO L226 Difference]: Without dead ends: 426 [2021-08-06 20:39:04,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 969.5ms TimeCoverageRelationStatistics Valid=1579, Invalid=3823, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 20:39:04,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-08-06 20:39:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 236. [2021-08-06 20:39:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.0425531914893618) internal successors, (245), 235 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 245 transitions. [2021-08-06 20:39:04,329 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 245 transitions. Word has length 121 [2021-08-06 20:39:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:04,329 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 245 transitions. [2021-08-06 20:39:04,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.1666666666666665) internal successors, (171), 54 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 245 transitions. [2021-08-06 20:39:04,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-08-06 20:39:04,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:04,330 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:04,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:04,544 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 [2021-08-06 20:39:04,545 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:04,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:04,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1671085826, now seen corresponding path program 64 times [2021-08-06 20:39:04,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:04,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884799936] [2021-08-06 20:39:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:04,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 425 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:04,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:04,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884799936] [2021-08-06 20:39:04,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884799936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:04,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830516511] [2021-08-06 20:39:04,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:39:04,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:04,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:04,969 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) [2021-08-06 20:39:04,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 20:39:08,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:39:08,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:08,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 20:39:08,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 425 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:09,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830516511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:09,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:09,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2021-08-06 20:39:09,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91225324] [2021-08-06 20:39:09,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-06 20:39:09,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:09,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-06 20:39:09,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 20:39:09,960 INFO L87 Difference]: Start difference. First operand 236 states and 245 transitions. Second operand has 54 states, 54 states have (on average 3.1666666666666665) internal successors, (171), 54 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:10,329 INFO L93 Difference]: Finished difference Result 394 states and 403 transitions. [2021-08-06 20:39:10,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:39:10,329 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.1666666666666665) internal successors, (171), 54 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-08-06 20:39:10,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:10,330 INFO L225 Difference]: With dead ends: 394 [2021-08-06 20:39:10,330 INFO L226 Difference]: Without dead ends: 241 [2021-08-06 20:39:10,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 995.4ms TimeCoverageRelationStatistics Valid=1214, Invalid=3898, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 20:39:10,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-06 20:39:10,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2021-08-06 20:39:10,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0420168067226891) internal successors, (248), 238 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:10,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 248 transitions. [2021-08-06 20:39:10,332 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 248 transitions. Word has length 121 [2021-08-06 20:39:10,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:10,333 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 248 transitions. [2021-08-06 20:39:10,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.1666666666666665) internal successors, (171), 54 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:10,333 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 248 transitions. [2021-08-06 20:39:10,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-08-06 20:39:10,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:10,333 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:10,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-06 20:39:10,556 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 [2021-08-06 20:39:10,557 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:10,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1525366820, now seen corresponding path program 65 times [2021-08-06 20:39:10,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:10,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431182927] [2021-08-06 20:39:10,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:10,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:11,687 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:39:11,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:39:11,730 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:39:11,733 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:39:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:11,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:11,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431182927] [2021-08-06 20:39:11,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431182927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:11,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571240561] [2021-08-06 20:39:11,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:39:11,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:11,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:11,809 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) [2021-08-06 20:39:11,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 20:39:15,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-06 20:39:15,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:15,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 82 conjunts are in the unsatisfiable core [2021-08-06 20:39:15,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:18,058 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:39:18,058 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 59 treesize of output 33 [2021-08-06 20:39:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:18,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571240561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:18,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:18,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 61 [2021-08-06 20:39:18,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831661043] [2021-08-06 20:39:18,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-06 20:39:18,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:18,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-06 20:39:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=3570, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 20:39:18,098 INFO L87 Difference]: Start difference. First operand 239 states and 248 transitions. Second operand has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:18,985 INFO L93 Difference]: Finished difference Result 427 states and 446 transitions. [2021-08-06 20:39:18,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:39:18,985 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-08-06 20:39:18,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:18,986 INFO L225 Difference]: With dead ends: 427 [2021-08-06 20:39:18,986 INFO L226 Difference]: Without dead ends: 412 [2021-08-06 20:39:18,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1986.4ms TimeCoverageRelationStatistics Valid=223, Invalid=3809, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:39:18,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-08-06 20:39:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 247. [2021-08-06 20:39:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.048780487804878) internal successors, (258), 246 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 258 transitions. [2021-08-06 20:39:18,989 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 258 transitions. Word has length 124 [2021-08-06 20:39:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:18,989 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 258 transitions. [2021-08-06 20:39:18,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 258 transitions. [2021-08-06 20:39:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-08-06 20:39:18,990 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:18,990 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:19,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:19,196 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 [2021-08-06 20:39:19,197 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:19,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:19,197 INFO L82 PathProgramCache]: Analyzing trace with hash -944515340, now seen corresponding path program 66 times [2021-08-06 20:39:19,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:19,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095921936] [2021-08-06 20:39:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:19,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:19,641 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:39:19,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:39:19,667 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,670 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,696 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,698 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,725 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,727 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,756 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,758 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,787 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,790 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,823 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,826 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,857 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,859 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,892 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,894 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,930 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,932 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,967 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:19,969 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:20,005 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:20,007 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:20,045 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:20,047 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:20,085 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:20,087 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:20,126 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:20,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:20,168 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:20,170 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:20,211 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:20,214 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:20,256 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:39:20,258 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:39:20,306 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:39:20,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:39:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:20,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:20,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095921936] [2021-08-06 20:39:20,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095921936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:20,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802025925] [2021-08-06 20:39:20,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:39:20,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:20,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:20,418 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) [2021-08-06 20:39:20,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 20:39:24,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-06 20:39:24,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:24,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 84 conjunts are in the unsatisfiable core [2021-08-06 20:39:24,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:26,531 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:39:26,532 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 61 treesize of output 33 [2021-08-06 20:39:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:26,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802025925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:26,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:26,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 62 [2021-08-06 20:39:26,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914734304] [2021-08-06 20:39:26,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-06 20:39:26,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:26,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-06 20:39:26,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=3745, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 20:39:26,574 INFO L87 Difference]: Start difference. First operand 247 states and 258 transitions. Second operand has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 62 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:28,264 INFO L93 Difference]: Finished difference Result 449 states and 472 transitions. [2021-08-06 20:39:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:39:28,265 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 62 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-08-06 20:39:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:28,266 INFO L225 Difference]: With dead ends: 449 [2021-08-06 20:39:28,266 INFO L226 Difference]: Without dead ends: 434 [2021-08-06 20:39:28,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 2429.3ms TimeCoverageRelationStatistics Valid=303, Invalid=6503, Unknown=0, NotChecked=0, Total=6806 [2021-08-06 20:39:28,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-08-06 20:39:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 257. [2021-08-06 20:39:28,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.05078125) internal successors, (269), 256 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 269 transitions. [2021-08-06 20:39:28,269 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 269 transitions. Word has length 124 [2021-08-06 20:39:28,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:28,270 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 269 transitions. [2021-08-06 20:39:28,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 62 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 269 transitions. [2021-08-06 20:39:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-08-06 20:39:28,270 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:28,270 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:28,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:28,484 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 [2021-08-06 20:39:28,485 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:28,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:28,485 INFO L82 PathProgramCache]: Analyzing trace with hash -968743106, now seen corresponding path program 67 times [2021-08-06 20:39:28,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:28,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879954633] [2021-08-06 20:39:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:28,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 425 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:28,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:28,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879954633] [2021-08-06 20:39:28,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879954633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:28,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942191138] [2021-08-06 20:39:28,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:39:28,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:28,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:28,897 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) [2021-08-06 20:39:28,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 20:39:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:33,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 20:39:33,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 425 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:33,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942191138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:33,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:33,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 57 [2021-08-06 20:39:33,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881218470] [2021-08-06 20:39:33,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-06 20:39:33,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:33,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-06 20:39:33,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 20:39:33,966 INFO L87 Difference]: Start difference. First operand 257 states and 269 transitions. Second operand has 57 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 57 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:34,431 INFO L93 Difference]: Finished difference Result 447 states and 465 transitions. [2021-08-06 20:39:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 20:39:34,431 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 57 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-08-06 20:39:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:34,432 INFO L225 Difference]: With dead ends: 447 [2021-08-06 20:39:34,432 INFO L226 Difference]: Without dead ends: 447 [2021-08-06 20:39:34,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 849.0ms TimeCoverageRelationStatistics Valid=1752, Invalid=4254, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 20:39:34,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-08-06 20:39:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 248. [2021-08-06 20:39:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.040485829959514) internal successors, (257), 247 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:34,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 257 transitions. [2021-08-06 20:39:34,435 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 257 transitions. Word has length 127 [2021-08-06 20:39:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:34,435 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 257 transitions. [2021-08-06 20:39:34,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 57 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 257 transitions. [2021-08-06 20:39:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-08-06 20:39:34,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:34,436 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:34,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:34,661 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 [2021-08-06 20:39:34,661 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:34,661 INFO L82 PathProgramCache]: Analyzing trace with hash -914844218, now seen corresponding path program 68 times [2021-08-06 20:39:34,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:34,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981643490] [2021-08-06 20:39:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:34,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 477 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:35,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:35,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981643490] [2021-08-06 20:39:35,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981643490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:35,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462117001] [2021-08-06 20:39:35,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:39:35,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:35,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:35,309 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) [2021-08-06 20:39:35,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 20:39:39,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:39:39,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:39,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 20:39:39,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 477 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:40,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462117001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:40,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:40,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 57 [2021-08-06 20:39:40,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737129950] [2021-08-06 20:39:40,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-06 20:39:40,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:40,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-06 20:39:40,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 20:39:40,619 INFO L87 Difference]: Start difference. First operand 248 states and 257 transitions. Second operand has 57 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 57 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:41,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:41,135 INFO L93 Difference]: Finished difference Result 415 states and 424 transitions. [2021-08-06 20:39:41,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:39:41,136 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 57 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-08-06 20:39:41,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:41,136 INFO L225 Difference]: With dead ends: 415 [2021-08-06 20:39:41,136 INFO L226 Difference]: Without dead ends: 253 [2021-08-06 20:39:41,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1309.7ms TimeCoverageRelationStatistics Valid=1348, Invalid=4352, Unknown=0, NotChecked=0, Total=5700 [2021-08-06 20:39:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-06 20:39:41,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 251. [2021-08-06 20:39:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.04) internal successors, (260), 250 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 260 transitions. [2021-08-06 20:39:41,139 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 260 transitions. Word has length 127 [2021-08-06 20:39:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:41,139 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 260 transitions. [2021-08-06 20:39:41,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 57 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:41,139 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 260 transitions. [2021-08-06 20:39:41,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-06 20:39:41,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:41,140 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:41,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:41,341 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 [2021-08-06 20:39:41,341 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:41,341 INFO L82 PathProgramCache]: Analyzing trace with hash -9428884, now seen corresponding path program 69 times [2021-08-06 20:39:41,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:41,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459286672] [2021-08-06 20:39:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:41,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:42,602 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:39:42,604 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:39:42,644 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:39:42,646 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:39:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:42,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:42,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459286672] [2021-08-06 20:39:42,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459286672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:42,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724411252] [2021-08-06 20:39:42,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:39:42,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:42,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:42,715 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) [2021-08-06 20:39:42,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 20:39:47,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-08-06 20:39:47,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:47,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-06 20:39:47,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:49,740 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:39:49,740 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 59 treesize of output 33 [2021-08-06 20:39:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:49,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724411252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:49,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:49,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2021-08-06 20:39:49,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71761483] [2021-08-06 20:39:49,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-08-06 20:39:49,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:49,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-08-06 20:39:49,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3937, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 20:39:49,780 INFO L87 Difference]: Start difference. First operand 251 states and 260 transitions. Second operand has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:50,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:50,504 INFO L93 Difference]: Finished difference Result 448 states and 467 transitions. [2021-08-06 20:39:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 20:39:50,505 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-08-06 20:39:50,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:50,506 INFO L225 Difference]: With dead ends: 448 [2021-08-06 20:39:50,506 INFO L226 Difference]: Without dead ends: 433 [2021-08-06 20:39:50,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2091.6ms TimeCoverageRelationStatistics Valid=234, Invalid=4188, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 20:39:50,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-08-06 20:39:50,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 259. [2021-08-06 20:39:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.0465116279069768) internal successors, (270), 258 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 270 transitions. [2021-08-06 20:39:50,510 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 270 transitions. Word has length 130 [2021-08-06 20:39:50,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:50,511 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 270 transitions. [2021-08-06 20:39:50,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:50,511 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 270 transitions. [2021-08-06 20:39:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-06 20:39:50,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:50,512 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:50,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:50,727 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 [2021-08-06 20:39:50,727 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:50,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:50,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1268141038, now seen corresponding path program 70 times [2021-08-06 20:39:50,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:50,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423667190] [2021-08-06 20:39:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:50,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:51,124 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:39:51,126 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:39:51,150 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,152 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,180 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,210 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,239 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,297 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,299 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,333 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,362 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,364 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,394 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,396 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,429 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,462 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,464 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,498 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,500 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,534 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,536 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,573 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,576 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,612 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,614 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,652 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,654 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,694 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,696 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:39:51,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:39:51,741 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:39:51,782 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:39:51,785 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:39:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:51,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:51,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423667190] [2021-08-06 20:39:51,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423667190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:51,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567924565] [2021-08-06 20:39:51,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:39:51,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:51,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:51,891 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) [2021-08-06 20:39:51,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 20:39:56,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:39:56,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:56,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-06 20:39:56,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:58,635 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:39:58,635 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 52 treesize of output 37 [2021-08-06 20:39:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:58,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567924565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:58,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:58,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 63 [2021-08-06 20:39:58,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972101546] [2021-08-06 20:39:58,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-08-06 20:39:58,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:58,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-08-06 20:39:58,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3850, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:39:58,664 INFO L87 Difference]: Start difference. First operand 259 states and 270 transitions. Second operand has 64 states, 64 states have (on average 3.0) internal successors, (192), 63 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:59,710 INFO L93 Difference]: Finished difference Result 455 states and 475 transitions. [2021-08-06 20:39:59,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 20:39:59,711 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.0) internal successors, (192), 63 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-08-06 20:39:59,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:59,712 INFO L225 Difference]: With dead ends: 455 [2021-08-06 20:39:59,712 INFO L226 Difference]: Without dead ends: 440 [2021-08-06 20:39:59,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1626.7ms TimeCoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 20:39:59,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-08-06 20:39:59,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 269. [2021-08-06 20:39:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.0485074626865671) internal successors, (281), 268 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) [2021-08-06 20:39:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 281 transitions. [2021-08-06 20:39:59,716 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 281 transitions. Word has length 130 [2021-08-06 20:39:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:59,716 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 281 transitions. [2021-08-06 20:39:59,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.0) internal successors, (192), 63 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 281 transitions. [2021-08-06 20:39:59,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-08-06 20:39:59,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:59,717 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:59,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:59,935 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 [2021-08-06 20:39:59,936 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:59,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:59,936 INFO L82 PathProgramCache]: Analyzing trace with hash 824167430, now seen corresponding path program 71 times [2021-08-06 20:39:59,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:59,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464260871] [2021-08-06 20:39:59,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:59,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 477 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:00,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:00,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464260871] [2021-08-06 20:40:00,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464260871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:00,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704794711] [2021-08-06 20:40:00,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:40:00,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:00,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:00,497 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) [2021-08-06 20:40:00,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 20:40:05,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-08-06 20:40:05,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:05,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 20:40:05,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 477 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:06,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704794711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:06,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:06,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 60 [2021-08-06 20:40:06,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249958120] [2021-08-06 20:40:06,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-06 20:40:06,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:06,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-06 20:40:06,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 20:40:06,046 INFO L87 Difference]: Start difference. First operand 269 states and 281 transitions. Second operand has 60 states, 60 states have (on average 3.15) internal successors, (189), 60 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:06,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:06,409 INFO L93 Difference]: Finished difference Result 468 states and 486 transitions. [2021-08-06 20:40:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:40:06,410 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.15) internal successors, (189), 60 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-08-06 20:40:06,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:06,411 INFO L225 Difference]: With dead ends: 468 [2021-08-06 20:40:06,411 INFO L226 Difference]: Without dead ends: 468 [2021-08-06 20:40:06,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 941.1ms TimeCoverageRelationStatistics Valid=1934, Invalid=4708, Unknown=0, NotChecked=0, Total=6642 [2021-08-06 20:40:06,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-06 20:40:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 260. [2021-08-06 20:40:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.0386100386100385) internal successors, (269), 259 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 269 transitions. [2021-08-06 20:40:06,414 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 269 transitions. Word has length 133 [2021-08-06 20:40:06,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:06,414 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 269 transitions. [2021-08-06 20:40:06,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.15) internal successors, (189), 60 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 269 transitions. [2021-08-06 20:40:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-08-06 20:40:06,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:06,415 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:40:06,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 20:40:06,615 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 [2021-08-06 20:40:06,615 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:06,616 INFO L82 PathProgramCache]: Analyzing trace with hash 208171134, now seen corresponding path program 72 times [2021-08-06 20:40:06,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:06,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498074163] [2021-08-06 20:40:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:06,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 532 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:07,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:07,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498074163] [2021-08-06 20:40:07,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498074163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:07,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865302214] [2021-08-06 20:40:07,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:40:07,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:07,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:07,208 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) [2021-08-06 20:40:07,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 20:40:11,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-08-06 20:40:11,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:11,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 20:40:11,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 532 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:13,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865302214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:13,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:13,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 60 [2021-08-06 20:40:13,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500278564] [2021-08-06 20:40:13,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-06 20:40:13,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:13,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-06 20:40:13,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 20:40:13,054 INFO L87 Difference]: Start difference. First operand 260 states and 269 transitions. Second operand has 60 states, 60 states have (on average 3.15) internal successors, (189), 60 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:13,469 INFO L93 Difference]: Finished difference Result 436 states and 445 transitions. [2021-08-06 20:40:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 20:40:13,470 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.15) internal successors, (189), 60 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-08-06 20:40:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:13,470 INFO L225 Difference]: With dead ends: 436 [2021-08-06 20:40:13,470 INFO L226 Difference]: Without dead ends: 265 [2021-08-06 20:40:13,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 1233.4ms TimeCoverageRelationStatistics Valid=1489, Invalid=4831, Unknown=0, NotChecked=0, Total=6320 [2021-08-06 20:40:13,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-06 20:40:13,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 263. [2021-08-06 20:40:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.0381679389312977) internal successors, (272), 262 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 272 transitions. [2021-08-06 20:40:13,473 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 272 transitions. Word has length 133 [2021-08-06 20:40:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:13,473 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 272 transitions. [2021-08-06 20:40:13,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.15) internal successors, (189), 60 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 272 transitions. [2021-08-06 20:40:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-08-06 20:40:13,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:13,474 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:40:13,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 20:40:13,700 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 [2021-08-06 20:40:13,701 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:13,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:13,701 INFO L82 PathProgramCache]: Analyzing trace with hash 375056036, now seen corresponding path program 73 times [2021-08-06 20:40:13,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:13,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407474219] [2021-08-06 20:40:13,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:13,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:14,785 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:40:14,786 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:40:14,825 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:40:14,827 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:40:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:14,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:14,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407474219] [2021-08-06 20:40:14,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407474219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:14,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245393061] [2021-08-06 20:40:14,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:40:14,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:14,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:14,893 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) [2021-08-06 20:40:14,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 20:40:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:19,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 90 conjunts are in the unsatisfiable core [2021-08-06 20:40:19,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:21,838 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:40:21,838 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 65 treesize of output 39 [2021-08-06 20:40:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:21,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245393061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:21,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:21,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2021-08-06 20:40:21,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175430188] [2021-08-06 20:40:21,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-08-06 20:40:21,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:21,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-08-06 20:40:21,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=4322, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 20:40:21,873 INFO L87 Difference]: Start difference. First operand 263 states and 272 transitions. Second operand has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:22,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:22,731 INFO L93 Difference]: Finished difference Result 469 states and 488 transitions. [2021-08-06 20:40:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 20:40:22,731 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-08-06 20:40:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:22,732 INFO L225 Difference]: With dead ends: 469 [2021-08-06 20:40:22,732 INFO L226 Difference]: Without dead ends: 454 [2021-08-06 20:40:22,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1920.0ms TimeCoverageRelationStatistics Valid=245, Invalid=4585, Unknown=0, NotChecked=0, Total=4830 [2021-08-06 20:40:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-06 20:40:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 271. [2021-08-06 20:40:22,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.0444444444444445) internal successors, (282), 270 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 282 transitions. [2021-08-06 20:40:22,736 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 282 transitions. Word has length 136 [2021-08-06 20:40:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:22,736 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 282 transitions. [2021-08-06 20:40:22,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:22,761 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 282 transitions. [2021-08-06 20:40:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-08-06 20:40:22,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:22,761 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:40:22,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 20:40:22,962 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 [2021-08-06 20:40:22,962 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:22,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:22,962 INFO L82 PathProgramCache]: Analyzing trace with hash -938261068, now seen corresponding path program 74 times [2021-08-06 20:40:22,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:22,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193062048] [2021-08-06 20:40:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:22,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:23,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:40:23,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:40:23,505 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,507 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,535 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,538 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,567 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,569 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,599 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,602 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,636 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,639 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,675 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,678 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,715 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,717 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,755 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,757 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,796 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,798 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,838 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,840 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,881 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,883 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,925 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,928 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,972 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:23,975 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:24,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:24,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:24,068 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:24,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:24,118 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:24,120 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:24,171 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:24,173 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:24,225 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:24,227 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:40:24,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:40:24,280 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:40:24,333 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:40:24,336 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:40:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:24,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:24,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193062048] [2021-08-06 20:40:24,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193062048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:24,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844915937] [2021-08-06 20:40:24,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:40:24,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:24,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:24,457 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) [2021-08-06 20:40:24,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 20:40:29,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:40:29,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:29,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 90 conjunts are in the unsatisfiable core [2021-08-06 20:40:29,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:32,359 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:40:32,359 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 56 treesize of output 41 [2021-08-06 20:40:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:32,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844915937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:32,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:32,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 66 [2021-08-06 20:40:32,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314541680] [2021-08-06 20:40:32,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-06 20:40:32,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:32,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-06 20:40:32,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4231, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 20:40:32,392 INFO L87 Difference]: Start difference. First operand 271 states and 282 transitions. Second operand has 67 states, 67 states have (on average 3.0) internal successors, (201), 66 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:33,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:33,518 INFO L93 Difference]: Finished difference Result 476 states and 496 transitions. [2021-08-06 20:40:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 20:40:33,519 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.0) internal successors, (201), 66 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-08-06 20:40:33,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:33,520 INFO L225 Difference]: With dead ends: 476 [2021-08-06 20:40:33,520 INFO L226 Difference]: Without dead ends: 461 [2021-08-06 20:40:33,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 2121.2ms TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 20:40:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-08-06 20:40:33,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 281. [2021-08-06 20:40:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.0464285714285715) internal successors, (293), 280 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 293 transitions. [2021-08-06 20:40:33,523 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 293 transitions. Word has length 136 [2021-08-06 20:40:33,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:33,523 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 293 transitions. [2021-08-06 20:40:33,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.0) internal successors, (201), 66 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:33,523 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 293 transitions. [2021-08-06 20:40:33,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-08-06 20:40:33,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:33,523 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:40:33,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 20:40:33,724 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 [2021-08-06 20:40:33,724 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:33,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1528957250, now seen corresponding path program 75 times [2021-08-06 20:40:33,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:33,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442980197] [2021-08-06 20:40:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:33,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 532 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:34,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:34,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442980197] [2021-08-06 20:40:34,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442980197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:34,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217224369] [2021-08-06 20:40:34,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:40:34,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:34,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:34,423 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) [2021-08-06 20:40:34,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 20:40:39,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-08-06 20:40:39,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:39,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:40:39,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 532 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:40,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217224369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:40,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:40,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 63 [2021-08-06 20:40:40,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769533044] [2021-08-06 20:40:40,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-06 20:40:40,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:40,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-06 20:40:40,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 20:40:40,674 INFO L87 Difference]: Start difference. First operand 281 states and 293 transitions. Second operand has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:41,285 INFO L93 Difference]: Finished difference Result 489 states and 507 transitions. [2021-08-06 20:40:41,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 20:40:41,285 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-08-06 20:40:41,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:41,286 INFO L225 Difference]: With dead ends: 489 [2021-08-06 20:40:41,286 INFO L226 Difference]: Without dead ends: 489 [2021-08-06 20:40:41,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 1309.9ms TimeCoverageRelationStatistics Valid=2125, Invalid=5185, Unknown=0, NotChecked=0, Total=7310 [2021-08-06 20:40:41,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-06 20:40:41,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 272. [2021-08-06 20:40:41,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.03690036900369) internal successors, (281), 271 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) [2021-08-06 20:40:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 281 transitions. [2021-08-06 20:40:41,290 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 281 transitions. Word has length 139 [2021-08-06 20:40:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:41,290 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 281 transitions. [2021-08-06 20:40:41,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 281 transitions. [2021-08-06 20:40:41,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-08-06 20:40:41,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:41,290 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:40:41,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 20:40:41,516 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 [2021-08-06 20:40:41,517 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:41,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:41,517 INFO L82 PathProgramCache]: Analyzing trace with hash -279355578, now seen corresponding path program 76 times [2021-08-06 20:40:41,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:41,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694348424] [2021-08-06 20:40:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:41,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 590 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:42,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:42,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694348424] [2021-08-06 20:40:42,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694348424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:42,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371650399] [2021-08-06 20:40:42,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:40:42,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:42,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:42,274 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) [2021-08-06 20:40:42,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 20:40:47,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:40:47,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:47,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 20:40:47,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 590 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:48,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371650399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:48,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:48,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 63 [2021-08-06 20:40:48,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51849841] [2021-08-06 20:40:48,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-06 20:40:48,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:48,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-06 20:40:48,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 20:40:48,843 INFO L87 Difference]: Start difference. First operand 272 states and 281 transitions. Second operand has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:49,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:49,421 INFO L93 Difference]: Finished difference Result 457 states and 466 transitions. [2021-08-06 20:40:49,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:40:49,421 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-08-06 20:40:49,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:49,422 INFO L225 Difference]: With dead ends: 457 [2021-08-06 20:40:49,422 INFO L226 Difference]: Without dead ends: 277 [2021-08-06 20:40:49,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 1634.9ms TimeCoverageRelationStatistics Valid=1637, Invalid=5335, Unknown=0, NotChecked=0, Total=6972 [2021-08-06 20:40:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-08-06 20:40:49,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2021-08-06 20:40:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.0364963503649636) internal successors, (284), 274 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 284 transitions. [2021-08-06 20:40:49,425 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 284 transitions. Word has length 139 [2021-08-06 20:40:49,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:49,425 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 284 transitions. [2021-08-06 20:40:49,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 284 transitions. [2021-08-06 20:40:49,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-08-06 20:40:49,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:49,425 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:40:49,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 20:40:49,653 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 [2021-08-06 20:40:49,653 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash 893919468, now seen corresponding path program 77 times [2021-08-06 20:40:49,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:49,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14330902] [2021-08-06 20:40:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:49,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:51,064 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:40:51,066 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:40:51,114 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:40:51,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:40:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:51,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:51,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14330902] [2021-08-06 20:40:51,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14330902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:51,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987046254] [2021-08-06 20:40:51,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:40:51,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:51,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:51,203 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) [2021-08-06 20:40:51,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 20:40:56,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-08-06 20:40:56,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:56,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-06 20:40:56,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:59,550 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:40:59,550 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 65 treesize of output 39 [2021-08-06 20:40:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:59,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987046254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:59,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:59,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2021-08-06 20:40:59,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666707808] [2021-08-06 20:40:59,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-06 20:40:59,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:59,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-06 20:40:59,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=4725, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 20:40:59,584 INFO L87 Difference]: Start difference. First operand 275 states and 284 transitions. Second operand has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:00,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:00,676 INFO L93 Difference]: Finished difference Result 490 states and 509 transitions. [2021-08-06 20:41:00,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:41:00,677 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-08-06 20:41:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:00,678 INFO L225 Difference]: With dead ends: 490 [2021-08-06 20:41:00,678 INFO L226 Difference]: Without dead ends: 475 [2021-08-06 20:41:00,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 2621.9ms TimeCoverageRelationStatistics Valid=256, Invalid=5000, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 20:41:00,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-08-06 20:41:00,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 283. [2021-08-06 20:41:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.0425531914893618) internal successors, (294), 282 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:00,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 294 transitions. [2021-08-06 20:41:00,681 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 294 transitions. Word has length 142 [2021-08-06 20:41:00,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:00,681 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 294 transitions. [2021-08-06 20:41:00,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 294 transitions. [2021-08-06 20:41:00,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-08-06 20:41:00,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:00,682 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:41:00,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 20:41:00,882 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 [2021-08-06 20:41:00,882 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:00,882 INFO L82 PathProgramCache]: Analyzing trace with hash 637142098, now seen corresponding path program 78 times [2021-08-06 20:41:00,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:00,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91712514] [2021-08-06 20:41:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:00,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:01,623 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:41:01,625 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:41:01,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,725 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,753 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,756 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,785 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,787 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,817 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,820 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,852 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,884 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,886 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,919 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,922 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,955 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,957 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,992 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:01,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,031 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,033 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,073 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,111 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,113 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,152 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,155 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,196 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,199 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,242 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,244 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,287 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,302 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,358 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,360 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,405 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,407 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:02,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:41:02,505 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:41:02,553 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:41:02,555 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:41:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:02,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:02,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91712514] [2021-08-06 20:41:02,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91712514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:02,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702672053] [2021-08-06 20:41:02,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:41:02,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:02,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:02,672 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) [2021-08-06 20:41:02,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 20:41:07,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-08-06 20:41:07,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:41:07,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-06 20:41:07,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:11,058 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:41:11,059 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 56 treesize of output 41 [2021-08-06 20:41:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:11,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702672053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:11,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:11,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 69 [2021-08-06 20:41:11,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069627221] [2021-08-06 20:41:11,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-08-06 20:41:11,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:11,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-08-06 20:41:11,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4630, Unknown=0, NotChecked=0, Total=4830 [2021-08-06 20:41:11,091 INFO L87 Difference]: Start difference. First operand 283 states and 294 transitions. Second operand has 70 states, 70 states have (on average 3.0) internal successors, (210), 69 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:12,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:12,162 INFO L93 Difference]: Finished difference Result 497 states and 517 transitions. [2021-08-06 20:41:12,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:41:12,163 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.0) internal successors, (210), 69 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-08-06 20:41:12,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:12,164 INFO L225 Difference]: With dead ends: 497 [2021-08-06 20:41:12,164 INFO L226 Difference]: Without dead ends: 482 [2021-08-06 20:41:12,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 2392.2ms TimeCoverageRelationStatistics Valid=210, Invalid=4902, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 20:41:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-06 20:41:12,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 293. [2021-08-06 20:41:12,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.0445205479452055) internal successors, (305), 292 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 305 transitions. [2021-08-06 20:41:12,167 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 305 transitions. Word has length 142 [2021-08-06 20:41:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:12,167 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 305 transitions. [2021-08-06 20:41:12,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.0) internal successors, (210), 69 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 305 transitions. [2021-08-06 20:41:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-08-06 20:41:12,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:12,168 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:41:12,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 20:41:12,376 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 [2021-08-06 20:41:12,377 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:12,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:12,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1486960006, now seen corresponding path program 79 times [2021-08-06 20:41:12,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:12,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492961623] [2021-08-06 20:41:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:12,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 590 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:13,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:13,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492961623] [2021-08-06 20:41:13,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492961623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:13,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037915655] [2021-08-06 20:41:13,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:41:13,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:13,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:13,213 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) [2021-08-06 20:41:13,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 20:41:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:18,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 20:41:18,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 590 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:19,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037915655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:19,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:19,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 66 [2021-08-06 20:41:19,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520605193] [2021-08-06 20:41:19,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-06 20:41:19,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:19,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-06 20:41:19,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 20:41:19,592 INFO L87 Difference]: Start difference. First operand 293 states and 305 transitions. Second operand has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:19,988 INFO L93 Difference]: Finished difference Result 510 states and 528 transitions. [2021-08-06 20:41:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 20:41:19,988 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-08-06 20:41:19,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:19,989 INFO L225 Difference]: With dead ends: 510 [2021-08-06 20:41:19,989 INFO L226 Difference]: Without dead ends: 510 [2021-08-06 20:41:19,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 1297.4ms TimeCoverageRelationStatistics Valid=2325, Invalid=5685, Unknown=0, NotChecked=0, Total=8010 [2021-08-06 20:41:19,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-08-06 20:41:19,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 284. [2021-08-06 20:41:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.0353356890459364) internal successors, (293), 283 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 293 transitions. [2021-08-06 20:41:19,993 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 293 transitions. Word has length 145 [2021-08-06 20:41:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:19,993 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 293 transitions. [2021-08-06 20:41:19,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 293 transitions. [2021-08-06 20:41:19,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-08-06 20:41:19,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:19,994 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:41:20,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 20:41:20,216 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 [2021-08-06 20:41:20,217 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:20,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:20,217 INFO L82 PathProgramCache]: Analyzing trace with hash -406151170, now seen corresponding path program 80 times [2021-08-06 20:41:20,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:20,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273014312] [2021-08-06 20:41:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:20,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 651 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:20,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:20,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273014312] [2021-08-06 20:41:20,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273014312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:20,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574015392] [2021-08-06 20:41:20,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:41:20,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:20,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:20,868 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) [2021-08-06 20:41:20,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 20:41:26,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:41:26,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:41:26,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 20:41:26,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 651 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:27,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574015392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:27,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:27,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 66 [2021-08-06 20:41:27,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095249197] [2021-08-06 20:41:27,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-06 20:41:27,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:27,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-06 20:41:27,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 20:41:27,633 INFO L87 Difference]: Start difference. First operand 284 states and 293 transitions. Second operand has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:28,002 INFO L93 Difference]: Finished difference Result 478 states and 487 transitions. [2021-08-06 20:41:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 20:41:28,015 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-08-06 20:41:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:28,016 INFO L225 Difference]: With dead ends: 478 [2021-08-06 20:41:28,016 INFO L226 Difference]: Without dead ends: 289 [2021-08-06 20:41:28,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 1193.5ms TimeCoverageRelationStatistics Valid=1792, Invalid=5864, Unknown=0, NotChecked=0, Total=7656 [2021-08-06 20:41:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-08-06 20:41:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2021-08-06 20:41:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.034965034965035) internal successors, (296), 286 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:28,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 296 transitions. [2021-08-06 20:41:28,033 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 296 transitions. Word has length 145 [2021-08-06 20:41:28,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:28,033 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 296 transitions. [2021-08-06 20:41:28,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:28,034 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 296 transitions. [2021-08-06 20:41:28,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-08-06 20:41:28,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:28,035 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:41:28,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 20:41:28,235 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 [2021-08-06 20:41:28,235 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:28,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:28,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1664027940, now seen corresponding path program 81 times [2021-08-06 20:41:28,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:28,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974848727] [2021-08-06 20:41:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:28,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:29,485 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:41:29,486 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:41:29,524 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:41:29,526 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:41:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:29,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:29,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974848727] [2021-08-06 20:41:29,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974848727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:29,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454958793] [2021-08-06 20:41:29,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:41:29,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:29,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:29,589 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) [2021-08-06 20:41:29,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 20:41:35,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-08-06 20:41:35,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:41:35,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-06 20:41:35,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:37,667 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:41:37,668 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 65 treesize of output 39 [2021-08-06 20:41:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:37,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454958793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:37,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:37,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2021-08-06 20:41:37,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078549045] [2021-08-06 20:41:37,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-08-06 20:41:37,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:37,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-08-06 20:41:37,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=5146, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 20:41:37,695 INFO L87 Difference]: Start difference. First operand 287 states and 296 transitions. Second operand has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:38,687 INFO L93 Difference]: Finished difference Result 511 states and 530 transitions. [2021-08-06 20:41:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 20:41:38,688 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-08-06 20:41:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:38,689 INFO L225 Difference]: With dead ends: 511 [2021-08-06 20:41:38,689 INFO L226 Difference]: Without dead ends: 496 [2021-08-06 20:41:38,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 2199.2ms TimeCoverageRelationStatistics Valid=267, Invalid=5433, Unknown=0, NotChecked=0, Total=5700 [2021-08-06 20:41:38,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-08-06 20:41:38,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 295. [2021-08-06 20:41:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.0408163265306123) internal successors, (306), 294 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:38,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 306 transitions. [2021-08-06 20:41:38,693 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 306 transitions. Word has length 148 [2021-08-06 20:41:38,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:38,693 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 306 transitions. [2021-08-06 20:41:38,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:38,693 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 306 transitions. [2021-08-06 20:41:38,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-08-06 20:41:38,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:38,693 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:41:38,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 20:41:38,908 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 [2021-08-06 20:41:38,909 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:38,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:38,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1032846220, now seen corresponding path program 82 times [2021-08-06 20:41:38,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:38,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833035631] [2021-08-06 20:41:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:38,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:39,471 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:41:39,473 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:41:39,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,493 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,513 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,515 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,536 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,538 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,560 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,561 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,584 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,586 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,610 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,637 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,639 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,664 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,666 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,695 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,697 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,776 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,778 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,807 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,809 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,839 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,841 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,874 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,876 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,912 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,913 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,946 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,948 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,982 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:39,984 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:40,019 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:40,021 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:40,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:40,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:40,098 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:40,100 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:41:40,136 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:41:40,137 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:41:40,173 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:41:40,175 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:41:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:40,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:40,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833035631] [2021-08-06 20:41:40,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833035631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:40,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474592210] [2021-08-06 20:41:40,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:41:40,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:40,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:40,261 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) [2021-08-06 20:41:40,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 20:41:46,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:41:46,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:41:46,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-06 20:41:46,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:48,387 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:41:48,388 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 56 treesize of output 41 [2021-08-06 20:41:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:48,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474592210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:48,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:48,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 72 [2021-08-06 20:41:48,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818085649] [2021-08-06 20:41:48,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-06 20:41:48,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:48,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-06 20:41:48,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=5047, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 20:41:48,411 INFO L87 Difference]: Start difference. First operand 295 states and 306 transitions. Second operand has 73 states, 73 states have (on average 3.0) internal successors, (219), 72 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:49,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:49,389 INFO L93 Difference]: Finished difference Result 518 states and 538 transitions. [2021-08-06 20:41:49,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 20:41:49,390 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.0) internal successors, (219), 72 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-08-06 20:41:49,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:49,391 INFO L225 Difference]: With dead ends: 518 [2021-08-06 20:41:49,391 INFO L226 Difference]: Without dead ends: 503 [2021-08-06 20:41:49,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1814.4ms TimeCoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 20:41:49,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-06 20:41:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 305. [2021-08-06 20:41:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.042763157894737) internal successors, (317), 304 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 317 transitions. [2021-08-06 20:41:49,394 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 317 transitions. Word has length 148 [2021-08-06 20:41:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:49,394 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 317 transitions. [2021-08-06 20:41:49,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.0) internal successors, (219), 72 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:49,394 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 317 transitions. [2021-08-06 20:41:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-08-06 20:41:49,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:49,395 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:41:49,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 20:41:49,608 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 [2021-08-06 20:41:49,609 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:49,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1360476610, now seen corresponding path program 83 times [2021-08-06 20:41:49,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:49,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474730039] [2021-08-06 20:41:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:49,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 651 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:50,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:50,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474730039] [2021-08-06 20:41:50,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474730039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:50,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172708208] [2021-08-06 20:41:50,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:41:50,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:50,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:50,116 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) [2021-08-06 20:41:50,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 20:41:56,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-08-06 20:41:56,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:41:56,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 20:41:56,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 651 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:56,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172708208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:56,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:56,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 69 [2021-08-06 20:41:56,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961162499] [2021-08-06 20:41:56,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-08-06 20:41:56,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:56,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-06 20:41:56,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 20:41:56,990 INFO L87 Difference]: Start difference. First operand 305 states and 317 transitions. Second operand has 69 states, 69 states have (on average 3.130434782608696) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:57,480 INFO L93 Difference]: Finished difference Result 531 states and 549 transitions. [2021-08-06 20:41:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:41:57,481 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.130434782608696) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-08-06 20:41:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:57,482 INFO L225 Difference]: With dead ends: 531 [2021-08-06 20:41:57,482 INFO L226 Difference]: Without dead ends: 531 [2021-08-06 20:41:57,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 975.4ms TimeCoverageRelationStatistics Valid=2534, Invalid=6208, Unknown=0, NotChecked=0, Total=8742 [2021-08-06 20:41:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-08-06 20:41:57,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 296. [2021-08-06 20:41:57,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.0338983050847457) internal successors, (305), 295 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 305 transitions. [2021-08-06 20:41:57,485 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 305 transitions. Word has length 151 [2021-08-06 20:41:57,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:57,486 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 305 transitions. [2021-08-06 20:41:57,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.130434782608696) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:57,486 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 305 transitions. [2021-08-06 20:41:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-08-06 20:41:57,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:57,486 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:41:57,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 20:41:57,707 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 [2021-08-06 20:41:57,708 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:57,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:57,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1819957050, now seen corresponding path program 84 times [2021-08-06 20:41:57,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:57,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105026558] [2021-08-06 20:41:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:57,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 715 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:58,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:58,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105026558] [2021-08-06 20:41:58,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105026558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:58,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367047314] [2021-08-06 20:41:58,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:41:58,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:58,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:58,389 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) [2021-08-06 20:41:58,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 20:42:04,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-08-06 20:42:04,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:04,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 20:42:04,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 715 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:05,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367047314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:05,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:05,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 69 [2021-08-06 20:42:05,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435202086] [2021-08-06 20:42:05,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-08-06 20:42:05,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:05,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-06 20:42:05,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 20:42:05,400 INFO L87 Difference]: Start difference. First operand 296 states and 305 transitions. Second operand has 69 states, 69 states have (on average 3.130434782608696) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:05,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:05,817 INFO L93 Difference]: Finished difference Result 499 states and 508 transitions. [2021-08-06 20:42:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 20:42:05,818 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.130434782608696) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-08-06 20:42:05,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:05,819 INFO L225 Difference]: With dead ends: 499 [2021-08-06 20:42:05,819 INFO L226 Difference]: Without dead ends: 301 [2021-08-06 20:42:05,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 1330.1ms TimeCoverageRelationStatistics Valid=1954, Invalid=6418, Unknown=0, NotChecked=0, Total=8372 [2021-08-06 20:42:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-08-06 20:42:05,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 299. [2021-08-06 20:42:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.0335570469798658) internal successors, (308), 298 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:05,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 308 transitions. [2021-08-06 20:42:05,822 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 308 transitions. Word has length 151 [2021-08-06 20:42:05,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:05,822 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 308 transitions. [2021-08-06 20:42:05,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.130434782608696) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:05,822 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 308 transitions. [2021-08-06 20:42:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-08-06 20:42:05,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:05,822 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:42:05,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:06,044 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 [2021-08-06 20:42:06,045 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:06,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:06,045 INFO L82 PathProgramCache]: Analyzing trace with hash -716103316, now seen corresponding path program 85 times [2021-08-06 20:42:06,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:06,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316661260] [2021-08-06 20:42:06,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:06,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:07,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:42:07,201 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:42:07,235 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:42:07,237 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:42:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:07,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:07,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316661260] [2021-08-06 20:42:07,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316661260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:07,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266551343] [2021-08-06 20:42:07,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:42:07,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:07,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:07,307 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) [2021-08-06 20:42:07,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 20:42:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:13,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 102 conjunts are in the unsatisfiable core [2021-08-06 20:42:13,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:16,997 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:42:16,997 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 65 treesize of output 39 [2021-08-06 20:42:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:17,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266551343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:17,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:17,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2021-08-06 20:42:17,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140770925] [2021-08-06 20:42:17,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-08-06 20:42:17,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:17,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-08-06 20:42:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=5585, Unknown=0, NotChecked=0, Total=5852 [2021-08-06 20:42:17,050 INFO L87 Difference]: Start difference. First operand 299 states and 308 transitions. Second operand has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:18,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:18,451 INFO L93 Difference]: Finished difference Result 532 states and 551 transitions. [2021-08-06 20:42:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 20:42:18,451 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-08-06 20:42:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:18,453 INFO L225 Difference]: With dead ends: 532 [2021-08-06 20:42:18,453 INFO L226 Difference]: Without dead ends: 517 [2021-08-06 20:42:18,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2663.9ms TimeCoverageRelationStatistics Valid=278, Invalid=5884, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 20:42:18,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-08-06 20:42:18,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 307. [2021-08-06 20:42:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.0392156862745099) internal successors, (318), 306 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 318 transitions. [2021-08-06 20:42:18,456 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 318 transitions. Word has length 154 [2021-08-06 20:42:18,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:18,456 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 318 transitions. [2021-08-06 20:42:18,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:18,456 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 318 transitions. [2021-08-06 20:42:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-08-06 20:42:18,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:18,457 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:42:18,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 20:42:18,672 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 [2021-08-06 20:42:18,673 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:18,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:18,673 INFO L82 PathProgramCache]: Analyzing trace with hash 280003730, now seen corresponding path program 86 times [2021-08-06 20:42:18,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:18,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498731225] [2021-08-06 20:42:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:18,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:19,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:42:19,281 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:42:19,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,313 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,343 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,346 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,377 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,379 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,411 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,447 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,449 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,483 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,485 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,523 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,526 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,567 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,570 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,610 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,613 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,657 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,660 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,703 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,705 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,751 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,797 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,799 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,846 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,975 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:19,977 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:20,024 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:20,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:20,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:20,073 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:20,118 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:20,121 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:20,166 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:20,169 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:20,216 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:20,218 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:20,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:20,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:42:20,320 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:42:20,322 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:42:20,375 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:42:20,378 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:42:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:20,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:20,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498731225] [2021-08-06 20:42:20,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498731225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:20,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600168114] [2021-08-06 20:42:20,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:42:20,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:20,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:20,505 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) [2021-08-06 20:42:20,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 20:42:26,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:42:26,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:26,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 102 conjunts are in the unsatisfiable core [2021-08-06 20:42:26,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:29,835 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:42:29,835 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 56 treesize of output 41 [2021-08-06 20:42:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:29,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600168114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:29,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:29,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 75 [2021-08-06 20:42:29,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214160854] [2021-08-06 20:42:29,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-08-06 20:42:29,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:29,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-08-06 20:42:29,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5482, Unknown=0, NotChecked=0, Total=5700 [2021-08-06 20:42:29,866 INFO L87 Difference]: Start difference. First operand 307 states and 318 transitions. Second operand has 76 states, 76 states have (on average 3.0) internal successors, (228), 75 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:30,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:30,898 INFO L93 Difference]: Finished difference Result 539 states and 559 transitions. [2021-08-06 20:42:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 20:42:30,899 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.0) internal successors, (228), 75 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-08-06 20:42:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:30,900 INFO L225 Difference]: With dead ends: 539 [2021-08-06 20:42:30,900 INFO L226 Difference]: Without dead ends: 524 [2021-08-06 20:42:30,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 2669.8ms TimeCoverageRelationStatistics Valid=228, Invalid=5778, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 20:42:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-08-06 20:42:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 317. [2021-08-06 20:42:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.0411392405063291) internal successors, (329), 316 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 329 transitions. [2021-08-06 20:42:30,903 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 329 transitions. Word has length 154 [2021-08-06 20:42:30,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:30,903 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 329 transitions. [2021-08-06 20:42:30,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.0) internal successors, (228), 75 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 329 transitions. [2021-08-06 20:42:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-08-06 20:42:30,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:30,904 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:42:30,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:31,128 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 [2021-08-06 20:42:31,129 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1920868102, now seen corresponding path program 87 times [2021-08-06 20:42:31,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:31,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121801451] [2021-08-06 20:42:31,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:31,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 715 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:31,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:31,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121801451] [2021-08-06 20:42:31,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121801451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:31,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268701870] [2021-08-06 20:42:31,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:42:31,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:31,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:31,851 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) [2021-08-06 20:42:31,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 20:42:38,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-08-06 20:42:38,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:38,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 20:42:38,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 715 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:39,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268701870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:39,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:39,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 72 [2021-08-06 20:42:39,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961640403] [2021-08-06 20:42:39,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-08-06 20:42:39,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:39,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-08-06 20:42:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 20:42:39,500 INFO L87 Difference]: Start difference. First operand 317 states and 329 transitions. Second operand has 72 states, 72 states have (on average 3.125) internal successors, (225), 72 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:40,195 INFO L93 Difference]: Finished difference Result 552 states and 570 transitions. [2021-08-06 20:42:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 20:42:40,196 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.125) internal successors, (225), 72 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-08-06 20:42:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:40,197 INFO L225 Difference]: With dead ends: 552 [2021-08-06 20:42:40,197 INFO L226 Difference]: Without dead ends: 552 [2021-08-06 20:42:40,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 1486.3ms TimeCoverageRelationStatistics Valid=2752, Invalid=6754, Unknown=0, NotChecked=0, Total=9506 [2021-08-06 20:42:40,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-08-06 20:42:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 308. [2021-08-06 20:42:40,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.0325732899022801) internal successors, (317), 307 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 317 transitions. [2021-08-06 20:42:40,200 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 317 transitions. Word has length 157 [2021-08-06 20:42:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:40,201 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 317 transitions. [2021-08-06 20:42:40,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.125) internal successors, (225), 72 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 317 transitions. [2021-08-06 20:42:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-08-06 20:42:40,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:40,201 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:42:40,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:40,428 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 [2021-08-06 20:42:40,429 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:40,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:40,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1599852414, now seen corresponding path program 88 times [2021-08-06 20:42:40,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:40,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947971444] [2021-08-06 20:42:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:40,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 782 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:41,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:41,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947971444] [2021-08-06 20:42:41,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947971444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:41,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108603] [2021-08-06 20:42:41,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:42:41,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:41,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:41,434 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) [2021-08-06 20:42:41,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 20:42:47,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:42:47,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:47,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 20:42:47,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 782 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:49,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:49,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:49,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 72 [2021-08-06 20:42:49,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462288087] [2021-08-06 20:42:49,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-08-06 20:42:49,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:49,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-08-06 20:42:49,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 20:42:49,840 INFO L87 Difference]: Start difference. First operand 308 states and 317 transitions. Second operand has 72 states, 72 states have (on average 3.125) internal successors, (225), 72 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:50,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:50,581 INFO L93 Difference]: Finished difference Result 520 states and 529 transitions. [2021-08-06 20:42:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 20:42:50,581 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.125) internal successors, (225), 72 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-08-06 20:42:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:50,582 INFO L225 Difference]: With dead ends: 520 [2021-08-06 20:42:50,582 INFO L226 Difference]: Without dead ends: 313 [2021-08-06 20:42:50,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 2199.1ms TimeCoverageRelationStatistics Valid=2123, Invalid=6997, Unknown=0, NotChecked=0, Total=9120 [2021-08-06 20:42:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-06 20:42:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2021-08-06 20:42:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.032258064516129) internal successors, (320), 310 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 320 transitions. [2021-08-06 20:42:50,585 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 320 transitions. Word has length 157 [2021-08-06 20:42:50,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:50,585 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 320 transitions. [2021-08-06 20:42:50,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.125) internal successors, (225), 72 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 320 transitions. [2021-08-06 20:42:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-08-06 20:42:50,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:50,586 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:42:50,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:50,800 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 [2021-08-06 20:42:50,800 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:50,800 INFO L82 PathProgramCache]: Analyzing trace with hash 368554916, now seen corresponding path program 89 times [2021-08-06 20:42:50,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:50,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907036561] [2021-08-06 20:42:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:50,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:52,567 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:42:52,569 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:42:52,621 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:42:52,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:42:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:52,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:52,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907036561] [2021-08-06 20:42:52,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907036561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:52,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951989210] [2021-08-06 20:42:52,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:42:52,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:52,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:52,715 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) [2021-08-06 20:42:52,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 20:42:59,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-08-06 20:42:59,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:59,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 106 conjunts are in the unsatisfiable core [2021-08-06 20:42:59,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:02,830 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:43:02,831 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 65 treesize of output 39 [2021-08-06 20:43:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:02,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951989210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:02,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:02,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2021-08-06 20:43:02,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8509651] [2021-08-06 20:43:02,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-08-06 20:43:02,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:02,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-08-06 20:43:02,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=6042, Unknown=0, NotChecked=0, Total=6320 [2021-08-06 20:43:02,869 INFO L87 Difference]: Start difference. First operand 311 states and 320 transitions. Second operand has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:04,413 INFO L93 Difference]: Finished difference Result 553 states and 572 transitions. [2021-08-06 20:43:04,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 20:43:04,413 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-08-06 20:43:04,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:04,414 INFO L225 Difference]: With dead ends: 553 [2021-08-06 20:43:04,414 INFO L226 Difference]: Without dead ends: 538 [2021-08-06 20:43:04,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 3076.2ms TimeCoverageRelationStatistics Valid=289, Invalid=6353, Unknown=0, NotChecked=0, Total=6642 [2021-08-06 20:43:04,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-08-06 20:43:04,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 319. [2021-08-06 20:43:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.0377358490566038) internal successors, (330), 318 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 330 transitions. [2021-08-06 20:43:04,417 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 330 transitions. Word has length 160 [2021-08-06 20:43:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:04,418 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 330 transitions. [2021-08-06 20:43:04,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 330 transitions. [2021-08-06 20:43:04,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-08-06 20:43:04,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:04,418 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:43:04,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 20:43:04,632 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 [2021-08-06 20:43:04,633 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:04,633 INFO L82 PathProgramCache]: Analyzing trace with hash -914484428, now seen corresponding path program 90 times [2021-08-06 20:43:04,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:04,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354575394] [2021-08-06 20:43:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:04,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:05,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:43:05,284 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:43:05,313 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,316 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,349 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,389 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,392 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,429 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,466 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,468 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,505 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,508 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,554 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,557 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,606 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,609 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,655 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,698 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,701 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,745 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,747 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,796 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,843 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,845 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,892 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,894 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,942 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,945 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,993 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:05,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:06,047 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:06,049 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:06,102 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:06,105 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:06,156 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:06,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:06,209 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:06,212 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:06,264 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:06,266 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:06,321 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:06,324 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:06,376 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:43:06,378 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:43:06,432 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:43:06,434 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:43:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:06,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:06,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354575394] [2021-08-06 20:43:06,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354575394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:06,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999102669] [2021-08-06 20:43:06,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:43:06,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:06,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:06,564 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) [2021-08-06 20:43:06,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 20:43:13,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-08-06 20:43:13,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:13,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 106 conjunts are in the unsatisfiable core [2021-08-06 20:43:13,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:17,060 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:43:17,061 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 56 treesize of output 41 [2021-08-06 20:43:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:17,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999102669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:17,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:17,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 78 [2021-08-06 20:43:17,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79171971] [2021-08-06 20:43:17,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-06 20:43:17,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:17,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-06 20:43:17,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5935, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 20:43:17,092 INFO L87 Difference]: Start difference. First operand 319 states and 330 transitions. Second operand has 79 states, 79 states have (on average 3.0) internal successors, (237), 78 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:18,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:18,331 INFO L93 Difference]: Finished difference Result 560 states and 580 transitions. [2021-08-06 20:43:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 20:43:18,331 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.0) internal successors, (237), 78 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-08-06 20:43:18,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:18,332 INFO L225 Difference]: With dead ends: 560 [2021-08-06 20:43:18,332 INFO L226 Difference]: Without dead ends: 545 [2021-08-06 20:43:18,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 2783.5ms TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2021-08-06 20:43:18,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-08-06 20:43:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 329. [2021-08-06 20:43:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.0396341463414633) internal successors, (341), 328 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 341 transitions. [2021-08-06 20:43:18,336 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 341 transitions. Word has length 160 [2021-08-06 20:43:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:18,336 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 341 transitions. [2021-08-06 20:43:18,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.0) internal successors, (237), 78 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 341 transitions. [2021-08-06 20:43:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-08-06 20:43:18,336 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:18,337 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:43:18,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:18,544 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 [2021-08-06 20:43:18,545 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:18,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2100467134, now seen corresponding path program 91 times [2021-08-06 20:43:18,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:18,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598565478] [2021-08-06 20:43:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:18,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 782 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:19,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:19,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598565478] [2021-08-06 20:43:19,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598565478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:19,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456781915] [2021-08-06 20:43:19,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:43:19,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:19,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:19,637 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) [2021-08-06 20:43:19,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 20:43:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:26,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-06 20:43:26,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 782 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:28,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456781915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:28,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:28,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 75 [2021-08-06 20:43:28,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465876256] [2021-08-06 20:43:28,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-06 20:43:28,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:28,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-06 20:43:28,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 20:43:28,149 INFO L87 Difference]: Start difference. First operand 329 states and 341 transitions. Second operand has 75 states, 75 states have (on average 3.12) internal successors, (234), 75 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:28,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:28,845 INFO L93 Difference]: Finished difference Result 573 states and 591 transitions. [2021-08-06 20:43:28,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 20:43:28,846 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.12) internal successors, (234), 75 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-08-06 20:43:28,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:28,847 INFO L225 Difference]: With dead ends: 573 [2021-08-06 20:43:28,847 INFO L226 Difference]: Without dead ends: 573 [2021-08-06 20:43:28,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2902 ImplicationChecksByTransitivity, 1863.1ms TimeCoverageRelationStatistics Valid=2979, Invalid=7323, Unknown=0, NotChecked=0, Total=10302 [2021-08-06 20:43:28,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-08-06 20:43:28,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 320. [2021-08-06 20:43:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.031347962382445) internal successors, (329), 319 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 329 transitions. [2021-08-06 20:43:28,876 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 329 transitions. Word has length 163 [2021-08-06 20:43:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:28,876 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 329 transitions. [2021-08-06 20:43:28,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.12) internal successors, (234), 75 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 329 transitions. [2021-08-06 20:43:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-08-06 20:43:28,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:28,877 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:43:28,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:29,100 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 [2021-08-06 20:43:29,101 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:29,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:29,101 INFO L82 PathProgramCache]: Analyzing trace with hash -680693178, now seen corresponding path program 92 times [2021-08-06 20:43:29,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:29,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938319786] [2021-08-06 20:43:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:29,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 852 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:30,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:30,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938319786] [2021-08-06 20:43:30,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938319786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:30,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950444388] [2021-08-06 20:43:30,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:43:30,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:30,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:30,073 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) [2021-08-06 20:43:30,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 20:43:37,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:43:37,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:37,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-06 20:43:37,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 852 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:38,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950444388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:38,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:38,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 75 [2021-08-06 20:43:38,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874254886] [2021-08-06 20:43:38,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-06 20:43:38,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:38,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-06 20:43:38,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 20:43:38,998 INFO L87 Difference]: Start difference. First operand 320 states and 329 transitions. Second operand has 75 states, 75 states have (on average 3.12) internal successors, (234), 75 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:39,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:39,779 INFO L93 Difference]: Finished difference Result 541 states and 550 transitions. [2021-08-06 20:43:39,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 20:43:39,780 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.12) internal successors, (234), 75 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-08-06 20:43:39,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:39,780 INFO L225 Difference]: With dead ends: 541 [2021-08-06 20:43:39,780 INFO L226 Difference]: Without dead ends: 325 [2021-08-06 20:43:39,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 2177.0ms TimeCoverageRelationStatistics Valid=2299, Invalid=7601, Unknown=0, NotChecked=0, Total=9900 [2021-08-06 20:43:39,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-08-06 20:43:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2021-08-06 20:43:39,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.031055900621118) internal successors, (332), 322 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 332 transitions. [2021-08-06 20:43:39,785 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 332 transitions. Word has length 163 [2021-08-06 20:43:39,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:39,785 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 332 transitions. [2021-08-06 20:43:39,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.12) internal successors, (234), 75 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:39,785 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 332 transitions. [2021-08-06 20:43:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-08-06 20:43:39,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:39,786 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:43:39,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:39,999 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 [2021-08-06 20:43:40,000 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:40,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:40,000 INFO L82 PathProgramCache]: Analyzing trace with hash -725933588, now seen corresponding path program 93 times [2021-08-06 20:43:40,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:40,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451152837] [2021-08-06 20:43:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:40,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:41,960 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:43:41,962 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:43:42,016 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:43:42,018 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:43:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:42,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:42,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451152837] [2021-08-06 20:43:42,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451152837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:42,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234879097] [2021-08-06 20:43:42,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:43:42,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:42,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:42,117 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) [2021-08-06 20:43:42,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 20:43:49,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-08-06 20:43:49,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:49,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 110 conjunts are in the unsatisfiable core [2021-08-06 20:43:49,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:53,252 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:43:53,252 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 65 treesize of output 39 [2021-08-06 20:43:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:53,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234879097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:53,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:53,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2021-08-06 20:43:53,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061671537] [2021-08-06 20:43:53,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-08-06 20:43:53,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:53,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-08-06 20:43:53,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=6517, Unknown=0, NotChecked=0, Total=6806 [2021-08-06 20:43:53,288 INFO L87 Difference]: Start difference. First operand 323 states and 332 transitions. Second operand has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:54,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:54,921 INFO L93 Difference]: Finished difference Result 574 states and 593 transitions. [2021-08-06 20:43:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 20:43:54,921 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-08-06 20:43:54,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:54,922 INFO L225 Difference]: With dead ends: 574 [2021-08-06 20:43:54,922 INFO L226 Difference]: Without dead ends: 559 [2021-08-06 20:43:54,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 3686.3ms TimeCoverageRelationStatistics Valid=300, Invalid=6840, Unknown=0, NotChecked=0, Total=7140 [2021-08-06 20:43:54,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-06 20:43:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 331. [2021-08-06 20:43:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.0363636363636364) internal successors, (342), 330 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 342 transitions. [2021-08-06 20:43:54,926 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 342 transitions. Word has length 166 [2021-08-06 20:43:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:54,926 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 342 transitions. [2021-08-06 20:43:54,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 342 transitions. [2021-08-06 20:43:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-08-06 20:43:54,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:54,927 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:43:54,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:55,127 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 [2021-08-06 20:43:55,128 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:55,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:55,128 INFO L82 PathProgramCache]: Analyzing trace with hash -921094958, now seen corresponding path program 94 times [2021-08-06 20:43:55,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:55,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109871996] [2021-08-06 20:43:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:55,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:55,776 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:43:55,779 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:43:55,807 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:55,809 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:55,839 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:55,841 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:55,872 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:55,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:55,907 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:55,909 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:55,942 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:55,944 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:55,978 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:55,981 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,016 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,018 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,058 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,098 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,101 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,140 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,142 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,187 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,189 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,232 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,235 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,279 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,282 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,330 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,332 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,429 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,432 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,480 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,482 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,530 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,533 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,583 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,586 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,635 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,637 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,690 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,746 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,799 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,802 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:43:56,855 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:43:56,858 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:43:56,912 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:43:56,915 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:43:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:57,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:57,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109871996] [2021-08-06 20:43:57,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109871996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:57,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592916211] [2021-08-06 20:43:57,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:43:57,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:57,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:57,139 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) [2021-08-06 20:43:57,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 20:44:04,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:44:04,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:04,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 110 conjunts are in the unsatisfiable core [2021-08-06 20:44:04,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:08,204 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:44:08,204 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 56 treesize of output 41 [2021-08-06 20:44:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:08,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592916211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:08,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:08,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 81 [2021-08-06 20:44:08,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263803514] [2021-08-06 20:44:08,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-08-06 20:44:08,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:08,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-08-06 20:44:08,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6406, Unknown=0, NotChecked=0, Total=6642 [2021-08-06 20:44:08,235 INFO L87 Difference]: Start difference. First operand 331 states and 342 transitions. Second operand has 82 states, 82 states have (on average 3.0) internal successors, (246), 81 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:09,975 INFO L93 Difference]: Finished difference Result 581 states and 601 transitions. [2021-08-06 20:44:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 20:44:09,975 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.0) internal successors, (246), 81 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-08-06 20:44:09,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:09,977 INFO L225 Difference]: With dead ends: 581 [2021-08-06 20:44:09,977 INFO L226 Difference]: Without dead ends: 566 [2021-08-06 20:44:09,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 3079.8ms TimeCoverageRelationStatistics Valid=246, Invalid=6726, Unknown=0, NotChecked=0, Total=6972 [2021-08-06 20:44:09,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-08-06 20:44:09,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 341. [2021-08-06 20:44:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.0382352941176471) internal successors, (353), 340 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 353 transitions. [2021-08-06 20:44:09,980 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 353 transitions. Word has length 166 [2021-08-06 20:44:09,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:09,980 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 353 transitions. [2021-08-06 20:44:09,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.0) internal successors, (246), 81 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 353 transitions. [2021-08-06 20:44:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-08-06 20:44:09,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:09,981 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:10,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:10,189 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 [2021-08-06 20:44:10,189 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:10,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:10,190 INFO L82 PathProgramCache]: Analyzing trace with hash 136743046, now seen corresponding path program 95 times [2021-08-06 20:44:10,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:10,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230139762] [2021-08-06 20:44:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:10,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1777 backedges. 852 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:11,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:11,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230139762] [2021-08-06 20:44:11,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230139762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:11,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030969806] [2021-08-06 20:44:11,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:44:11,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:11,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:11,228 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) [2021-08-06 20:44:11,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 20:44:18,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-08-06 20:44:18,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:18,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 20:44:18,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1777 backedges. 852 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:20,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030969806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:20,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:20,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 78 [2021-08-06 20:44:20,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320085972] [2021-08-06 20:44:20,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-08-06 20:44:20,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:20,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-08-06 20:44:20,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 20:44:20,377 INFO L87 Difference]: Start difference. First operand 341 states and 353 transitions. Second operand has 78 states, 78 states have (on average 3.1153846153846154) internal successors, (243), 78 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:21,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:21,115 INFO L93 Difference]: Finished difference Result 594 states and 612 transitions. [2021-08-06 20:44:21,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 20:44:21,115 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.1153846153846154) internal successors, (243), 78 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-08-06 20:44:21,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:21,116 INFO L225 Difference]: With dead ends: 594 [2021-08-06 20:44:21,116 INFO L226 Difference]: Without dead ends: 594 [2021-08-06 20:44:21,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3148 ImplicationChecksByTransitivity, 1908.9ms TimeCoverageRelationStatistics Valid=3215, Invalid=7915, Unknown=0, NotChecked=0, Total=11130 [2021-08-06 20:44:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-08-06 20:44:21,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 332. [2021-08-06 20:44:21,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.0302114803625377) internal successors, (341), 331 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 341 transitions. [2021-08-06 20:44:21,121 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 341 transitions. Word has length 169 [2021-08-06 20:44:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:21,122 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 341 transitions. [2021-08-06 20:44:21,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.1153846153846154) internal successors, (243), 78 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:21,122 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 341 transitions. [2021-08-06 20:44:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-08-06 20:44:21,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:21,122 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:21,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:21,348 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 [2021-08-06 20:44:21,349 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:21,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:21,349 INFO L82 PathProgramCache]: Analyzing trace with hash 803995390, now seen corresponding path program 96 times [2021-08-06 20:44:21,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:21,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32837141] [2021-08-06 20:44:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:21,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1777 backedges. 925 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:22,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:22,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32837141] [2021-08-06 20:44:22,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32837141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:22,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517440766] [2021-08-06 20:44:22,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:44:22,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:22,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:22,423 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) [2021-08-06 20:44:22,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 20:44:30,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-08-06 20:44:30,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:30,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 20:44:30,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1777 backedges. 925 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:31,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517440766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:31,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:31,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 78 [2021-08-06 20:44:31,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328250536] [2021-08-06 20:44:31,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-08-06 20:44:31,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:31,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-08-06 20:44:31,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 20:44:31,950 INFO L87 Difference]: Start difference. First operand 332 states and 341 transitions. Second operand has 78 states, 78 states have (on average 3.1153846153846154) internal successors, (243), 78 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:32,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:32,739 INFO L93 Difference]: Finished difference Result 562 states and 571 transitions. [2021-08-06 20:44:32,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 20:44:32,739 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.1153846153846154) internal successors, (243), 78 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-08-06 20:44:32,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:32,740 INFO L225 Difference]: With dead ends: 562 [2021-08-06 20:44:32,740 INFO L226 Difference]: Without dead ends: 337 [2021-08-06 20:44:32,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 2398.0ms TimeCoverageRelationStatistics Valid=2482, Invalid=8230, Unknown=0, NotChecked=0, Total=10712 [2021-08-06 20:44:32,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-08-06 20:44:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 335. [2021-08-06 20:44:32,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.029940119760479) internal successors, (344), 334 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 344 transitions. [2021-08-06 20:44:32,743 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 344 transitions. Word has length 169 [2021-08-06 20:44:32,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:32,743 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 344 transitions. [2021-08-06 20:44:32,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.1153846153846154) internal successors, (243), 78 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:32,744 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 344 transitions. [2021-08-06 20:44:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-08-06 20:44:32,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:32,744 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:32,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:32,966 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 [2021-08-06 20:44:32,967 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:32,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:32,967 INFO L82 PathProgramCache]: Analyzing trace with hash -280700380, now seen corresponding path program 97 times [2021-08-06 20:44:32,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:32,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653291131] [2021-08-06 20:44:32,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:32,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:34,908 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:44:34,910 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:44:34,967 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:44:34,969 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:44:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:35,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:35,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653291131] [2021-08-06 20:44:35,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653291131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:35,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013630569] [2021-08-06 20:44:35,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:44:35,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:35,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:35,070 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) [2021-08-06 20:44:35,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 20:44:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:42,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 114 conjunts are in the unsatisfiable core [2021-08-06 20:44:42,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:46,641 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:44:46,642 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 65 treesize of output 39 [2021-08-06 20:44:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:46,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013630569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:46,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:46,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 85 [2021-08-06 20:44:46,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134166960] [2021-08-06 20:44:46,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-08-06 20:44:46,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:46,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-08-06 20:44:46,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=7010, Unknown=0, NotChecked=0, Total=7310 [2021-08-06 20:44:46,692 INFO L87 Difference]: Start difference. First operand 335 states and 344 transitions. Second operand has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:48,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:48,496 INFO L93 Difference]: Finished difference Result 595 states and 614 transitions. [2021-08-06 20:44:48,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:44:48,497 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-08-06 20:44:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:48,498 INFO L225 Difference]: With dead ends: 595 [2021-08-06 20:44:48,498 INFO L226 Difference]: Without dead ends: 580 [2021-08-06 20:44:48,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 3626.6ms TimeCoverageRelationStatistics Valid=311, Invalid=7345, Unknown=0, NotChecked=0, Total=7656 [2021-08-06 20:44:48,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-08-06 20:44:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 343. [2021-08-06 20:44:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.0350877192982457) internal successors, (354), 342 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 354 transitions. [2021-08-06 20:44:48,501 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 354 transitions. Word has length 172 [2021-08-06 20:44:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:48,502 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 354 transitions. [2021-08-06 20:44:48,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 354 transitions. [2021-08-06 20:44:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-08-06 20:44:48,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:48,502 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:48,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:48,707 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 [2021-08-06 20:44:48,707 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:48,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1326353932, now seen corresponding path program 98 times [2021-08-06 20:44:48,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:48,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789948175] [2021-08-06 20:44:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:48,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:49,474 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:44:49,476 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:44:49,505 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,507 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,539 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,541 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,672 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,674 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,706 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,708 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,743 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,777 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,815 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,817 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,854 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,857 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,895 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,897 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,978 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:49,980 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,022 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,067 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,069 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,112 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,114 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,158 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,161 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,206 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,209 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,255 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,258 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,314 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,365 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,367 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,419 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,488 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,492 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,540 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,543 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,586 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,588 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,629 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,631 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:44:50,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:44:50,672 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:44:50,711 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:44:50,713 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:44:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:50,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:50,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789948175] [2021-08-06 20:44:50,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789948175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:50,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34747985] [2021-08-06 20:44:50,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:44:50,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:50,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:50,809 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) [2021-08-06 20:44:50,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 20:44:58,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:44:58,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:58,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 116 conjunts are in the unsatisfiable core [2021-08-06 20:44:58,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:02,490 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:45:02,490 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 67 treesize of output 39 [2021-08-06 20:45:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:02,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34747985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:02,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:02,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58] total 86 [2021-08-06 20:45:02,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358525277] [2021-08-06 20:45:02,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-06 20:45:02,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:02,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-06 20:45:02,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=7257, Unknown=0, NotChecked=0, Total=7482 [2021-08-06 20:45:02,533 INFO L87 Difference]: Start difference. First operand 343 states and 354 transitions. Second operand has 87 states, 87 states have (on average 2.942528735632184) internal successors, (256), 86 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:05,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:05,830 INFO L93 Difference]: Finished difference Result 617 states and 640 transitions. [2021-08-06 20:45:05,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 20:45:05,831 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.942528735632184) internal successors, (256), 86 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-08-06 20:45:05,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:05,832 INFO L225 Difference]: With dead ends: 617 [2021-08-06 20:45:05,832 INFO L226 Difference]: Without dead ends: 602 [2021-08-06 20:45:05,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 4786.7ms TimeCoverageRelationStatistics Valid=423, Invalid=12687, Unknown=0, NotChecked=0, Total=13110 [2021-08-06 20:45:05,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-08-06 20:45:05,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 353. [2021-08-06 20:45:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.0369318181818181) internal successors, (365), 352 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 365 transitions. [2021-08-06 20:45:05,837 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 365 transitions. Word has length 172 [2021-08-06 20:45:05,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:05,837 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 365 transitions. [2021-08-06 20:45:05,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.942528735632184) internal successors, (256), 86 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 365 transitions. [2021-08-06 20:45:05,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-08-06 20:45:05,838 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:05,838 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:05,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:06,060 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 [2021-08-06 20:45:06,061 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:06,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:06,061 INFO L82 PathProgramCache]: Analyzing trace with hash 881550654, now seen corresponding path program 99 times [2021-08-06 20:45:06,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:06,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509566405] [2021-08-06 20:45:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:06,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 925 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:07,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:07,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509566405] [2021-08-06 20:45:07,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509566405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:07,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861287442] [2021-08-06 20:45:07,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:45:07,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:07,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:07,229 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) [2021-08-06 20:45:07,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 20:45:15,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-08-06 20:45:15,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-06 20:45:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 925 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:17,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861287442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:17,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:17,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 81 [2021-08-06 20:45:17,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295868688] [2021-08-06 20:45:17,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-08-06 20:45:17,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:17,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-08-06 20:45:17,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2021-08-06 20:45:17,091 INFO L87 Difference]: Start difference. First operand 353 states and 365 transitions. Second operand has 81 states, 81 states have (on average 3.111111111111111) internal successors, (252), 81 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:18,048 INFO L93 Difference]: Finished difference Result 615 states and 633 transitions. [2021-08-06 20:45:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 20:45:18,048 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.111111111111111) internal successors, (252), 81 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-08-06 20:45:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:18,049 INFO L225 Difference]: With dead ends: 615 [2021-08-06 20:45:18,049 INFO L226 Difference]: Without dead ends: 615 [2021-08-06 20:45:18,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 2098.0ms TimeCoverageRelationStatistics Valid=3460, Invalid=8530, Unknown=0, NotChecked=0, Total=11990 [2021-08-06 20:45:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-06 20:45:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 344. [2021-08-06 20:45:18,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.0291545189504374) internal successors, (353), 343 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:18,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 353 transitions. [2021-08-06 20:45:18,053 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 353 transitions. Word has length 175 [2021-08-06 20:45:18,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:18,053 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 353 transitions. [2021-08-06 20:45:18,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.111111111111111) internal successors, (252), 81 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:18,053 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 353 transitions. [2021-08-06 20:45:18,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-08-06 20:45:18,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:18,053 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:18,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:18,280 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 [2021-08-06 20:45:18,281 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:18,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:18,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1887484870, now seen corresponding path program 100 times [2021-08-06 20:45:18,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:18,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739558396] [2021-08-06 20:45:18,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:18,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 1001 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:19,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:19,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739558396] [2021-08-06 20:45:19,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739558396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:19,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039938410] [2021-08-06 20:45:19,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:45:19,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:19,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:19,646 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) [2021-08-06 20:45:19,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 20:45:28,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:45:28,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:28,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-06 20:45:28,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 1001 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:30,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039938410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:30,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:30,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 81 [2021-08-06 20:45:30,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073585073] [2021-08-06 20:45:30,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-08-06 20:45:30,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:30,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-08-06 20:45:30,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2021-08-06 20:45:30,195 INFO L87 Difference]: Start difference. First operand 344 states and 353 transitions. Second operand has 81 states, 81 states have (on average 3.111111111111111) internal successors, (252), 81 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:31,125 INFO L93 Difference]: Finished difference Result 583 states and 592 transitions. [2021-08-06 20:45:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 20:45:31,126 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.111111111111111) internal successors, (252), 81 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-08-06 20:45:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:31,126 INFO L225 Difference]: With dead ends: 583 [2021-08-06 20:45:31,126 INFO L226 Difference]: Without dead ends: 349 [2021-08-06 20:45:31,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 2801.5ms TimeCoverageRelationStatistics Valid=2672, Invalid=8884, Unknown=0, NotChecked=0, Total=11556 [2021-08-06 20:45:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-08-06 20:45:31,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 347. [2021-08-06 20:45:31,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.0289017341040463) internal successors, (356), 346 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:31,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 356 transitions. [2021-08-06 20:45:31,130 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 356 transitions. Word has length 175 [2021-08-06 20:45:31,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:31,130 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 356 transitions. [2021-08-06 20:45:31,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.111111111111111) internal successors, (252), 81 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:31,130 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 356 transitions. [2021-08-06 20:45:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-08-06 20:45:31,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:31,130 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:31,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:31,356 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 [2021-08-06 20:45:31,357 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:31,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:31,357 INFO L82 PathProgramCache]: Analyzing trace with hash 481698412, now seen corresponding path program 101 times [2021-08-06 20:45:31,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:31,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141427524] [2021-08-06 20:45:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:31,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:33,691 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:45:33,693 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:45:33,755 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:45:33,757 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:45:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:33,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:33,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141427524] [2021-08-06 20:45:33,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141427524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:33,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621340509] [2021-08-06 20:45:33,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:45:33,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:33,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:33,860 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) [2021-08-06 20:45:33,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 20:45:42,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-08-06 20:45:42,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:42,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 118 conjunts are in the unsatisfiable core [2021-08-06 20:45:42,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:46,849 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:45:46,849 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 59 treesize of output 33 [2021-08-06 20:45:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:46,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621340509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:46,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:46,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2021-08-06 20:45:46,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387715905] [2021-08-06 20:45:46,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-08-06 20:45:46,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:46,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-08-06 20:45:46,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=7521, Unknown=0, NotChecked=0, Total=7832 [2021-08-06 20:45:46,919 INFO L87 Difference]: Start difference. First operand 347 states and 356 transitions. Second operand has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:48,796 INFO L93 Difference]: Finished difference Result 616 states and 635 transitions. [2021-08-06 20:45:48,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-06 20:45:48,796 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-08-06 20:45:48,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:48,797 INFO L225 Difference]: With dead ends: 616 [2021-08-06 20:45:48,797 INFO L226 Difference]: Without dead ends: 601 [2021-08-06 20:45:48,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 4081.3ms TimeCoverageRelationStatistics Valid=322, Invalid=7868, Unknown=0, NotChecked=0, Total=8190 [2021-08-06 20:45:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-06 20:45:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 355. [2021-08-06 20:45:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.0338983050847457) internal successors, (366), 354 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 366 transitions. [2021-08-06 20:45:48,800 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 366 transitions. Word has length 178 [2021-08-06 20:45:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:48,800 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 366 transitions. [2021-08-06 20:45:48,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 366 transitions. [2021-08-06 20:45:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-08-06 20:45:48,801 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:48,801 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:48,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:49,011 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 [2021-08-06 20:45:49,011 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:49,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1564469998, now seen corresponding path program 102 times [2021-08-06 20:45:49,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:49,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837746212] [2021-08-06 20:45:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:49,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:50,047 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:45:50,049 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:45:50,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,081 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,114 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,150 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,152 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,183 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,185 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,216 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,218 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,251 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,253 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,286 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,288 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,325 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,327 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,363 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,366 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,404 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,406 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,445 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,448 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,487 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,489 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,530 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,532 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,573 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,575 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,617 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,620 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,662 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,664 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,706 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,708 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,750 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,752 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,798 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,800 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,846 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,848 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,895 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,897 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,945 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:50,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:51,000 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:51,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:51,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:51,119 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:51,121 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:45:51,181 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:45:51,184 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:45:51,247 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:45:51,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:45:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:51,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:51,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837746212] [2021-08-06 20:45:51,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837746212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:51,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668903487] [2021-08-06 20:45:51,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:45:51,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:51,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:51,403 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) [2021-08-06 20:45:51,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 20:45:59,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-08-06 20:45:59,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:59,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 120 conjunts are in the unsatisfiable core [2021-08-06 20:45:59,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:03,180 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:46:03,180 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 61 treesize of output 33 [2021-08-06 20:46:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:03,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668903487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:03,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:03,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 60] total 89 [2021-08-06 20:46:03,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468984631] [2021-08-06 20:46:03,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-08-06 20:46:03,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:03,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-08-06 20:46:03,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=7777, Unknown=0, NotChecked=0, Total=8010 [2021-08-06 20:46:03,204 INFO L87 Difference]: Start difference. First operand 355 states and 366 transitions. Second operand has 90 states, 90 states have (on average 2.9444444444444446) internal successors, (265), 89 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:05,844 INFO L93 Difference]: Finished difference Result 638 states and 661 transitions. [2021-08-06 20:46:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 20:46:05,845 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.9444444444444446) internal successors, (265), 89 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-08-06 20:46:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:05,845 INFO L225 Difference]: With dead ends: 638 [2021-08-06 20:46:05,845 INFO L226 Difference]: Without dead ends: 623 [2021-08-06 20:46:05,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2942 ImplicationChecksByTransitivity, 4309.1ms TimeCoverageRelationStatistics Valid=438, Invalid=13604, Unknown=0, NotChecked=0, Total=14042 [2021-08-06 20:46:05,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-08-06 20:46:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 365. [2021-08-06 20:46:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.0357142857142858) internal successors, (377), 364 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:05,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 377 transitions. [2021-08-06 20:46:05,849 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 377 transitions. Word has length 178 [2021-08-06 20:46:05,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:05,849 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 377 transitions. [2021-08-06 20:46:05,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.9444444444444446) internal successors, (265), 89 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:05,849 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 377 transitions. [2021-08-06 20:46:05,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-08-06 20:46:05,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:05,850 INFO L512 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:05,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:06,063 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 [2021-08-06 20:46:06,063 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:06,063 INFO L82 PathProgramCache]: Analyzing trace with hash 923431430, now seen corresponding path program 103 times [2021-08-06 20:46:06,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:06,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295279768] [2021-08-06 20:46:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:06,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 1001 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:07,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:07,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295279768] [2021-08-06 20:46:07,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295279768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:07,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797790853] [2021-08-06 20:46:07,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:46:07,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:07,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:07,221 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) [2021-08-06 20:46:07,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 20:46:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:16,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-06 20:46:16,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 1001 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:17,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797790853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:17,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:17,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 84 [2021-08-06 20:46:17,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084802736] [2021-08-06 20:46:17,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-08-06 20:46:17,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-08-06 20:46:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2021-08-06 20:46:17,809 INFO L87 Difference]: Start difference. First operand 365 states and 377 transitions. Second operand has 84 states, 84 states have (on average 3.107142857142857) internal successors, (261), 84 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:18,606 INFO L93 Difference]: Finished difference Result 636 states and 654 transitions. [2021-08-06 20:46:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:46:18,607 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.107142857142857) internal successors, (261), 84 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-08-06 20:46:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:18,607 INFO L225 Difference]: With dead ends: 636 [2021-08-06 20:46:18,608 INFO L226 Difference]: Without dead ends: 636 [2021-08-06 20:46:18,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3670 ImplicationChecksByTransitivity, 2035.0ms TimeCoverageRelationStatistics Valid=3714, Invalid=9168, Unknown=0, NotChecked=0, Total=12882 [2021-08-06 20:46:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-06 20:46:18,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 356. [2021-08-06 20:46:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.028169014084507) internal successors, (365), 355 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:18,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 365 transitions. [2021-08-06 20:46:18,611 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 365 transitions. Word has length 181 [2021-08-06 20:46:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:18,611 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 365 transitions. [2021-08-06 20:46:18,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.107142857142857) internal successors, (261), 84 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:18,612 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 365 transitions. [2021-08-06 20:46:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-08-06 20:46:18,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:18,612 INFO L512 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:18,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:18,828 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 [2021-08-06 20:46:18,829 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:18,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:18,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1572131202, now seen corresponding path program 104 times [2021-08-06 20:46:18,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:18,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340101741] [2021-08-06 20:46:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:18,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 1080 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:20,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:20,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340101741] [2021-08-06 20:46:20,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340101741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:20,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281673925] [2021-08-06 20:46:20,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:46:20,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:20,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:20,122 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) [2021-08-06 20:46:20,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 20:46:29,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:46:29,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:29,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-06 20:46:29,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 1080 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:31,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281673925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:31,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:31,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 84 [2021-08-06 20:46:31,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085671455] [2021-08-06 20:46:31,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-08-06 20:46:31,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:31,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-08-06 20:46:31,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2021-08-06 20:46:31,432 INFO L87 Difference]: Start difference. First operand 356 states and 365 transitions. Second operand has 84 states, 84 states have (on average 3.107142857142857) internal successors, (261), 84 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:32,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:32,370 INFO L93 Difference]: Finished difference Result 604 states and 613 transitions. [2021-08-06 20:46:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 20:46:32,371 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.107142857142857) internal successors, (261), 84 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-08-06 20:46:32,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:32,371 INFO L225 Difference]: With dead ends: 604 [2021-08-06 20:46:32,371 INFO L226 Difference]: Without dead ends: 361 [2021-08-06 20:46:32,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2919.5ms TimeCoverageRelationStatistics Valid=2869, Invalid=9563, Unknown=0, NotChecked=0, Total=12432 [2021-08-06 20:46:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-08-06 20:46:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 359. [2021-08-06 20:46:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.0279329608938548) internal successors, (368), 358 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 368 transitions. [2021-08-06 20:46:32,375 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 368 transitions. Word has length 181 [2021-08-06 20:46:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:32,375 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 368 transitions. [2021-08-06 20:46:32,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.107142857142857) internal successors, (261), 84 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:32,375 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 368 transitions. [2021-08-06 20:46:32,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-08-06 20:46:32,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:32,375 INFO L512 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:32,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:32,600 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 [2021-08-06 20:46:32,601 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:32,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:32,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1683586908, now seen corresponding path program 105 times [2021-08-06 20:46:32,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:32,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635301842] [2021-08-06 20:46:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:32,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:34,799 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:46:34,801 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:46:34,849 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:46:34,851 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:46:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:35,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:35,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635301842] [2021-08-06 20:46:35,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635301842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:35,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290538691] [2021-08-06 20:46:35,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:46:35,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:35,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:35,067 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) [2021-08-06 20:46:35,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 20:46:43,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-08-06 20:46:43,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:43,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 122 conjunts are in the unsatisfiable core [2021-08-06 20:46:43,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:48,228 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:46:48,228 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 65 treesize of output 39 [2021-08-06 20:46:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:48,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290538691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:48,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:48,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 91 [2021-08-06 20:46:48,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377336857] [2021-08-06 20:46:48,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-08-06 20:46:48,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:48,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-08-06 20:46:48,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=8050, Unknown=0, NotChecked=0, Total=8372 [2021-08-06 20:46:48,267 INFO L87 Difference]: Start difference. First operand 359 states and 368 transitions. Second operand has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:50,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:50,374 INFO L93 Difference]: Finished difference Result 637 states and 656 transitions. [2021-08-06 20:46:50,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 20:46:50,374 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-08-06 20:46:50,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:50,375 INFO L225 Difference]: With dead ends: 637 [2021-08-06 20:46:50,375 INFO L226 Difference]: Without dead ends: 622 [2021-08-06 20:46:50,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 4250.0ms TimeCoverageRelationStatistics Valid=333, Invalid=8409, Unknown=0, NotChecked=0, Total=8742 [2021-08-06 20:46:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-08-06 20:46:50,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 367. [2021-08-06 20:46:50,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.0327868852459017) internal successors, (378), 366 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 378 transitions. [2021-08-06 20:46:50,378 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 378 transitions. Word has length 184 [2021-08-06 20:46:50,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:50,379 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 378 transitions. [2021-08-06 20:46:50,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:50,379 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 378 transitions. [2021-08-06 20:46:50,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-08-06 20:46:50,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:50,379 INFO L512 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:50,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:50,580 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 [2021-08-06 20:46:50,580 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:50,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:50,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1300111540, now seen corresponding path program 106 times [2021-08-06 20:46:50,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:50,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655535147] [2021-08-06 20:46:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:50,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:51,479 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:46:51,481 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:46:51,511 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,514 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,545 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,547 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,579 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,582 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,617 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,619 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,692 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,694 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,737 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,740 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,788 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,832 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,834 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,870 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,873 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,914 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,916 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,956 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,995 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:51,997 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,039 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,041 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,082 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,084 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,126 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,175 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,178 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,226 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,229 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,279 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,282 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,330 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,332 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,378 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,380 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,429 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,527 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,529 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,577 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,630 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,632 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:46:52,684 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:46:52,686 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:46:52,739 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:46:52,741 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:46:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:52,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:52,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655535147] [2021-08-06 20:46:52,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655535147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:52,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085586591] [2021-08-06 20:46:52,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:46:52,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:52,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:52,872 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) [2021-08-06 20:46:52,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 20:47:02,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:47:02,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:02,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 122 conjunts are in the unsatisfiable core [2021-08-06 20:47:02,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:06,136 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 20:47:06,137 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 56 treesize of output 41 [2021-08-06 20:47:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:06,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085586591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:06,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:06,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 90 [2021-08-06 20:47:06,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569256298] [2021-08-06 20:47:06,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-08-06 20:47:06,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:06,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-08-06 20:47:06,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=7927, Unknown=0, NotChecked=0, Total=8190 [2021-08-06 20:47:06,172 INFO L87 Difference]: Start difference. First operand 367 states and 378 transitions. Second operand has 91 states, 91 states have (on average 3.0) internal successors, (273), 90 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:08,119 INFO L93 Difference]: Finished difference Result 644 states and 664 transitions. [2021-08-06 20:47:08,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 20:47:08,120 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.0) internal successors, (273), 90 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-08-06 20:47:08,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:08,120 INFO L225 Difference]: With dead ends: 644 [2021-08-06 20:47:08,121 INFO L226 Difference]: Without dead ends: 629 [2021-08-06 20:47:08,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 3347.8ms TimeCoverageRelationStatistics Valid=273, Invalid=8283, Unknown=0, NotChecked=0, Total=8556 [2021-08-06 20:47:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-08-06 20:47:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 377. [2021-08-06 20:47:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.0345744680851063) internal successors, (389), 376 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 389 transitions. [2021-08-06 20:47:08,124 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 389 transitions. Word has length 184 [2021-08-06 20:47:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:08,124 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 389 transitions. [2021-08-06 20:47:08,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.0) internal successors, (273), 90 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 389 transitions. [2021-08-06 20:47:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-08-06 20:47:08,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:08,125 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:08,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:08,325 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 [2021-08-06 20:47:08,325 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:08,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:08,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2050804546, now seen corresponding path program 107 times [2021-08-06 20:47:08,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:08,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159282272] [2021-08-06 20:47:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:08,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 1080 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:09,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:09,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159282272] [2021-08-06 20:47:09,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159282272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:09,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933318325] [2021-08-06 20:47:09,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:47:09,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:09,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:09,717 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) [2021-08-06 20:47:09,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 20:47:19,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-08-06 20:47:19,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-06 20:47:19,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 1080 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:21,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933318325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:21,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:21,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 87 [2021-08-06 20:47:21,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444208829] [2021-08-06 20:47:21,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-06 20:47:21,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:21,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-06 20:47:21,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1739, Invalid=5743, Unknown=0, NotChecked=0, Total=7482 [2021-08-06 20:47:21,052 INFO L87 Difference]: Start difference. First operand 377 states and 389 transitions. Second operand has 87 states, 87 states have (on average 3.103448275862069) internal successors, (270), 87 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:21,967 INFO L93 Difference]: Finished difference Result 657 states and 675 transitions. [2021-08-06 20:47:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-06 20:47:21,967 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.103448275862069) internal successors, (270), 87 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-08-06 20:47:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:21,968 INFO L225 Difference]: With dead ends: 657 [2021-08-06 20:47:21,968 INFO L226 Difference]: Without dead ends: 657 [2021-08-06 20:47:21,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3946 ImplicationChecksByTransitivity, 2468.9ms TimeCoverageRelationStatistics Valid=3977, Invalid=9829, Unknown=0, NotChecked=0, Total=13806 [2021-08-06 20:47:21,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-08-06 20:47:21,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 368. [2021-08-06 20:47:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.0272479564032697) internal successors, (377), 367 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:21,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 377 transitions. [2021-08-06 20:47:21,972 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 377 transitions. Word has length 187 [2021-08-06 20:47:21,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:21,972 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 377 transitions. [2021-08-06 20:47:21,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.103448275862069) internal successors, (270), 87 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:21,972 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 377 transitions. [2021-08-06 20:47:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-08-06 20:47:21,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:21,973 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:22,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:22,192 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 [2021-08-06 20:47:22,193 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:22,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1473280698, now seen corresponding path program 108 times [2021-08-06 20:47:22,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:22,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795814725] [2021-08-06 20:47:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:22,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 1162 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:23,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:23,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795814725] [2021-08-06 20:47:23,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795814725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:23,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593857657] [2021-08-06 20:47:23,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:47:23,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:23,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:23,498 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) [2021-08-06 20:47:23,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 20:47:33,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-08-06 20:47:33,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:33,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-06 20:47:33,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 1162 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:35,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593857657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:35,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:35,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 87 [2021-08-06 20:47:35,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489792406] [2021-08-06 20:47:35,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-06 20:47:35,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:35,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-06 20:47:35,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1739, Invalid=5743, Unknown=0, NotChecked=0, Total=7482 [2021-08-06 20:47:35,749 INFO L87 Difference]: Start difference. First operand 368 states and 377 transitions. Second operand has 87 states, 87 states have (on average 3.103448275862069) internal successors, (270), 87 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:36,718 INFO L93 Difference]: Finished difference Result 625 states and 634 transitions. [2021-08-06 20:47:36,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 20:47:36,719 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.103448275862069) internal successors, (270), 87 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-08-06 20:47:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:36,719 INFO L225 Difference]: With dead ends: 625 [2021-08-06 20:47:36,720 INFO L226 Difference]: Without dead ends: 373 [2021-08-06 20:47:36,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2674 ImplicationChecksByTransitivity, 3161.2ms TimeCoverageRelationStatistics Valid=3073, Invalid=10267, Unknown=0, NotChecked=0, Total=13340 [2021-08-06 20:47:36,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-08-06 20:47:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 371. [2021-08-06 20:47:36,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.027027027027027) internal successors, (380), 370 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:36,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 380 transitions. [2021-08-06 20:47:36,724 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 380 transitions. Word has length 187 [2021-08-06 20:47:36,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:36,724 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 380 transitions. [2021-08-06 20:47:36,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.103448275862069) internal successors, (270), 87 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:36,724 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 380 transitions. [2021-08-06 20:47:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-08-06 20:47:36,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:36,725 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:36,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:36,940 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 [2021-08-06 20:47:36,941 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1972231444, now seen corresponding path program 109 times [2021-08-06 20:47:36,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:36,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244534765] [2021-08-06 20:47:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:36,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:39,543 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:47:39,544 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:47:39,607 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:47:39,609 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:47:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 0 proven. 2324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:39,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:39,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244534765] [2021-08-06 20:47:39,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244534765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:39,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960990246] [2021-08-06 20:47:39,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:47:39,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:39,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:39,715 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) [2021-08-06 20:47:39,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 20:47:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:49,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 126 conjunts are in the unsatisfiable core [2021-08-06 20:47:49,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:53,446 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:47:53,446 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 65 treesize of output 39 [2021-08-06 20:47:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 0 proven. 2324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:53,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960990246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:53,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:53,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 94 [2021-08-06 20:47:53,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865812475] [2021-08-06 20:47:53,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-08-06 20:47:53,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:53,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-08-06 20:47:53,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=8597, Unknown=0, NotChecked=0, Total=8930 [2021-08-06 20:47:53,482 INFO L87 Difference]: Start difference. First operand 371 states and 380 transitions. Second operand has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:54,955 INFO L93 Difference]: Finished difference Result 658 states and 677 transitions. [2021-08-06 20:47:54,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-06 20:47:54,955 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-08-06 20:47:54,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:54,956 INFO L225 Difference]: With dead ends: 658 [2021-08-06 20:47:54,956 INFO L226 Difference]: Without dead ends: 643 [2021-08-06 20:47:54,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 4404.8ms TimeCoverageRelationStatistics Valid=344, Invalid=8968, Unknown=0, NotChecked=0, Total=9312 [2021-08-06 20:47:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-08-06 20:47:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 379. [2021-08-06 20:47:54,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.0317460317460319) internal successors, (390), 378 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 390 transitions. [2021-08-06 20:47:54,959 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 390 transitions. Word has length 190 [2021-08-06 20:47:54,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:54,960 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 390 transitions. [2021-08-06 20:47:54,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:54,960 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 390 transitions. [2021-08-06 20:47:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-08-06 20:47:54,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:54,960 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:55,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 20:47:55,176 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 [2021-08-06 20:47:55,177 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:55,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1338956462, now seen corresponding path program 110 times [2021-08-06 20:47:55,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:55,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881481636] [2021-08-06 20:47:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:55,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:55,928 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:47:55,929 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:47:55,951 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:55,953 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:55,976 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:55,978 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,002 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,003 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,028 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,030 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,055 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,057 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,085 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,087 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,116 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,118 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,146 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,147 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,180 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,213 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,215 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,247 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,285 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,288 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,334 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,376 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,378 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,425 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,427 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,470 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,472 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,515 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,561 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,609 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,611 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,657 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,659 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,705 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,707 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,755 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,757 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,805 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,807 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,856 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,858 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,908 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,911 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,961 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:56,964 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:57,016 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:57,018 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:47:57,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:47:57,073 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:47:57,128 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:47:57,130 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:47:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 0 proven. 2324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:57,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:57,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881481636] [2021-08-06 20:47:57,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881481636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:57,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450139458] [2021-08-06 20:47:57,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:47:57,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:57,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:57,280 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) [2021-08-06 20:47:57,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 20:48:06,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:48:06,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:06,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 128 conjunts are in the unsatisfiable core [2021-08-06 20:48:06,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:11,375 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:48:11,375 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 67 treesize of output 39 [2021-08-06 20:48:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 0 proven. 2324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:11,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450139458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:11,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:11,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 64] total 95 [2021-08-06 20:48:11,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825908478] [2021-08-06 20:48:11,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-08-06 20:48:11,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:11,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-08-06 20:48:11,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=8871, Unknown=0, NotChecked=0, Total=9120 [2021-08-06 20:48:11,423 INFO L87 Difference]: Start difference. First operand 379 states and 390 transitions. Second operand has 96 states, 96 states have (on average 2.9479166666666665) internal successors, (283), 95 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:15,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:15,513 INFO L93 Difference]: Finished difference Result 680 states and 703 transitions. [2021-08-06 20:48:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 20:48:15,513 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.9479166666666665) internal successors, (283), 95 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-08-06 20:48:15,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:15,514 INFO L225 Difference]: With dead ends: 680 [2021-08-06 20:48:15,515 INFO L226 Difference]: Without dead ends: 665 [2021-08-06 20:48:15,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3363 ImplicationChecksByTransitivity, 5617.6ms TimeCoverageRelationStatistics Valid=468, Invalid=15534, Unknown=0, NotChecked=0, Total=16002 [2021-08-06 20:48:15,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-08-06 20:48:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 389. [2021-08-06 20:48:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0335051546391754) internal successors, (401), 388 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:15,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 401 transitions. [2021-08-06 20:48:15,519 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 401 transitions. Word has length 190 [2021-08-06 20:48:15,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:15,519 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 401 transitions. [2021-08-06 20:48:15,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.9479166666666665) internal successors, (283), 95 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 401 transitions. [2021-08-06 20:48:15,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-08-06 20:48:15,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:15,520 INFO L512 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:15,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:15,740 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 [2021-08-06 20:48:15,741 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:15,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:15,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1332094074, now seen corresponding path program 111 times [2021-08-06 20:48:15,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:15,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050391858] [2021-08-06 20:48:15,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:15,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 1162 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:17,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:17,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050391858] [2021-08-06 20:48:17,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050391858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:17,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199023834] [2021-08-06 20:48:17,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:48:17,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:17,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:17,292 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) [2021-08-06 20:48:17,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 20:48:27,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-08-06 20:48:27,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:27,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-06 20:48:27,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 1162 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:29,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199023834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:29,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:29,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 90 [2021-08-06 20:48:29,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254673513] [2021-08-06 20:48:29,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-08-06 20:48:29,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:29,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-08-06 20:48:29,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2021-08-06 20:48:29,366 INFO L87 Difference]: Start difference. First operand 389 states and 401 transitions. Second operand has 90 states, 90 states have (on average 3.1) internal successors, (279), 90 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:30,355 INFO L93 Difference]: Finished difference Result 678 states and 696 transitions. [2021-08-06 20:48:30,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 20:48:30,356 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.1) internal successors, (279), 90 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-08-06 20:48:30,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:30,357 INFO L225 Difference]: With dead ends: 678 [2021-08-06 20:48:30,357 INFO L226 Difference]: Without dead ends: 678 [2021-08-06 20:48:30,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 2656.5ms TimeCoverageRelationStatistics Valid=4249, Invalid=10513, Unknown=0, NotChecked=0, Total=14762 [2021-08-06 20:48:30,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-08-06 20:48:30,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 380. [2021-08-06 20:48:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.0263852242744063) internal successors, (389), 379 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:30,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 389 transitions. [2021-08-06 20:48:30,361 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 389 transitions. Word has length 193 [2021-08-06 20:48:30,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:30,362 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 389 transitions. [2021-08-06 20:48:30,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.1) internal successors, (279), 90 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:30,362 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 389 transitions. [2021-08-06 20:48:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-08-06 20:48:30,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:30,363 INFO L512 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:30,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:30,576 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 [2021-08-06 20:48:30,577 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:30,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:30,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1958126082, now seen corresponding path program 112 times [2021-08-06 20:48:30,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:30,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370506] [2021-08-06 20:48:30,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:30,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 1247 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:32,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:32,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370506] [2021-08-06 20:48:32,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:32,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313783084] [2021-08-06 20:48:32,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:48:32,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:32,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:32,078 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) [2021-08-06 20:48:32,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 20:48:42,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:48:42,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:42,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-06 20:48:42,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 1247 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:44,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313783084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:44,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:44,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 90 [2021-08-06 20:48:44,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551203405] [2021-08-06 20:48:44,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-08-06 20:48:44,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-08-06 20:48:44,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2021-08-06 20:48:44,467 INFO L87 Difference]: Start difference. First operand 380 states and 389 transitions. Second operand has 90 states, 90 states have (on average 3.1) internal successors, (279), 90 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:45,588 INFO L93 Difference]: Finished difference Result 646 states and 655 transitions. [2021-08-06 20:48:45,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 20:48:45,589 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.1) internal successors, (279), 90 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-08-06 20:48:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:45,589 INFO L225 Difference]: With dead ends: 646 [2021-08-06 20:48:45,589 INFO L226 Difference]: Without dead ends: 385 [2021-08-06 20:48:45,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 3231.4ms TimeCoverageRelationStatistics Valid=3284, Invalid=10996, Unknown=0, NotChecked=0, Total=14280 [2021-08-06 20:48:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-08-06 20:48:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 383. [2021-08-06 20:48:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.0261780104712042) internal successors, (392), 382 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 392 transitions. [2021-08-06 20:48:45,593 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 392 transitions. Word has length 193 [2021-08-06 20:48:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:45,593 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 392 transitions. [2021-08-06 20:48:45,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.1) internal successors, (279), 90 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 392 transitions. [2021-08-06 20:48:45,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-08-06 20:48:45,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:45,594 INFO L512 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:45,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:45,808 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 [2021-08-06 20:48:45,809 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:45,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1280530652, now seen corresponding path program 113 times [2021-08-06 20:48:45,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:45,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247871679] [2021-08-06 20:48:45,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:45,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:48,282 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:48:48,283 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:48:48,345 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:48:48,347 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:48:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 2494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:48,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:48,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247871679] [2021-08-06 20:48:48,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247871679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:48,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305333894] [2021-08-06 20:48:48,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:48:48,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:48,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:48,457 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) [2021-08-06 20:48:48,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 20:48:58,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-08-06 20:48:58,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:58,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 130 conjunts are in the unsatisfiable core [2021-08-06 20:48:58,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:04,087 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:49:04,088 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 59 treesize of output 33 [2021-08-06 20:49:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 2494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:04,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305333894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:04,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:04,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 97 [2021-08-06 20:49:04,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492219073] [2021-08-06 20:49:04,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-08-06 20:49:04,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:04,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-08-06 20:49:04,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=9162, Unknown=0, NotChecked=0, Total=9506 [2021-08-06 20:49:04,123 INFO L87 Difference]: Start difference. First operand 383 states and 392 transitions. Second operand has 98 states, 98 states have (on average 2.979591836734694) internal successors, (292), 97 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:06,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:06,126 INFO L93 Difference]: Finished difference Result 679 states and 698 transitions. [2021-08-06 20:49:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-06 20:49:06,126 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.979591836734694) internal successors, (292), 97 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-08-06 20:49:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:06,127 INFO L225 Difference]: With dead ends: 679 [2021-08-06 20:49:06,127 INFO L226 Difference]: Without dead ends: 664 [2021-08-06 20:49:06,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 4790.5ms TimeCoverageRelationStatistics Valid=355, Invalid=9545, Unknown=0, NotChecked=0, Total=9900 [2021-08-06 20:49:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-08-06 20:49:06,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 391. [2021-08-06 20:49:06,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.0307692307692307) internal successors, (402), 390 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 402 transitions. [2021-08-06 20:49:06,131 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 402 transitions. Word has length 196 [2021-08-06 20:49:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:06,132 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 402 transitions. [2021-08-06 20:49:06,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.979591836734694) internal successors, (292), 97 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 402 transitions. [2021-08-06 20:49:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-08-06 20:49:06,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:06,132 INFO L512 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:06,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-06 20:49:06,360 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 [2021-08-06 20:49:06,361 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:06,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:06,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1260904588, now seen corresponding path program 114 times [2021-08-06 20:49:06,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:06,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013253907] [2021-08-06 20:49:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:06,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:07,353 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:49:07,355 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:49:07,387 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,389 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,422 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,424 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,457 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,460 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,494 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,497 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,532 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,535 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,571 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,573 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,610 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,613 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,651 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,653 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,693 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,696 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,736 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,738 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,782 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,825 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,827 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,871 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,873 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,918 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,921 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,970 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:07,972 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,073 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,122 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,175 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,178 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,226 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,228 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,277 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,279 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,330 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,333 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,386 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,388 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,441 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,443 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,495 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,497 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,551 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,553 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,607 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,610 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.2 percent of original size [2021-08-06 20:49:08,726 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:49:08,728 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 20:49:08,787 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:49:08,789 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:49:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 2494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:08,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:08,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013253907] [2021-08-06 20:49:08,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013253907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:08,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501774121] [2021-08-06 20:49:08,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:49:08,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:08,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:08,965 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) [2021-08-06 20:49:08,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 20:49:19,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2021-08-06 20:49:19,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:19,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 132 conjunts are in the unsatisfiable core [2021-08-06 20:49:19,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:24,111 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:49:24,112 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 61 treesize of output 33 [2021-08-06 20:49:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 2494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:24,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501774121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:24,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:24,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 66] total 98 [2021-08-06 20:49:24,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936731659] [2021-08-06 20:49:24,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-08-06 20:49:24,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:24,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-08-06 20:49:24,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=9445, Unknown=0, NotChecked=0, Total=9702 [2021-08-06 20:49:24,169 INFO L87 Difference]: Start difference. First operand 391 states and 402 transitions. Second operand has 99 states, 99 states have (on average 2.9494949494949494) internal successors, (292), 98 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:28,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:28,103 INFO L93 Difference]: Finished difference Result 701 states and 724 transitions. [2021-08-06 20:49:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-06 20:49:28,103 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.9494949494949494) internal successors, (292), 98 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-08-06 20:49:28,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:28,104 INFO L225 Difference]: With dead ends: 701 [2021-08-06 20:49:28,104 INFO L226 Difference]: Without dead ends: 686 [2021-08-06 20:49:28,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3584 ImplicationChecksByTransitivity, 5958.7ms TimeCoverageRelationStatistics Valid=483, Invalid=16547, Unknown=0, NotChecked=0, Total=17030 [2021-08-06 20:49:28,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-08-06 20:49:28,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 401. [2021-08-06 20:49:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.0325) internal successors, (413), 400 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 413 transitions. [2021-08-06 20:49:28,108 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 413 transitions. Word has length 196 [2021-08-06 20:49:28,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:28,108 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 413 transitions. [2021-08-06 20:49:28,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.9494949494949494) internal successors, (292), 98 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:28,108 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 413 transitions. [2021-08-06 20:49:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-08-06 20:49:28,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:28,109 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:28,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 20:49:28,336 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 [2021-08-06 20:49:28,337 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:28,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:28,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1381366722, now seen corresponding path program 115 times [2021-08-06 20:49:28,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:28,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819708957] [2021-08-06 20:49:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:28,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2582 backedges. 1247 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:30,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:30,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819708957] [2021-08-06 20:49:30,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819708957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:30,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408148798] [2021-08-06 20:49:30,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:49:30,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:30,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:30,031 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) [2021-08-06 20:49:30,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 20:49:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:40,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-06 20:49:40,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2582 backedges. 1247 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:42,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408148798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:42,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:42,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 93 [2021-08-06 20:49:42,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474427776] [2021-08-06 20:49:42,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-08-06 20:49:42,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:42,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-08-06 20:49:42,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1983, Invalid=6573, Unknown=0, NotChecked=0, Total=8556 [2021-08-06 20:49:42,720 INFO L87 Difference]: Start difference. First operand 401 states and 413 transitions. Second operand has 93 states, 93 states have (on average 3.096774193548387) internal successors, (288), 93 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:43,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:43,675 INFO L93 Difference]: Finished difference Result 699 states and 717 transitions. [2021-08-06 20:49:43,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-06 20:49:43,675 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.096774193548387) internal successors, (288), 93 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-08-06 20:49:43,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:43,676 INFO L225 Difference]: With dead ends: 699 [2021-08-06 20:49:43,677 INFO L226 Difference]: Without dead ends: 699 [2021-08-06 20:49:43,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4528 ImplicationChecksByTransitivity, 2708.6ms TimeCoverageRelationStatistics Valid=4530, Invalid=11220, Unknown=0, NotChecked=0, Total=15750 [2021-08-06 20:49:43,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-08-06 20:49:43,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 392. [2021-08-06 20:49:43,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.0255754475703325) internal successors, (401), 391 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 401 transitions. [2021-08-06 20:49:43,683 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 401 transitions. Word has length 199 [2021-08-06 20:49:43,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:43,684 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 401 transitions. [2021-08-06 20:49:43,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.096774193548387) internal successors, (288), 93 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 401 transitions. [2021-08-06 20:49:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-08-06 20:49:43,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:43,684 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:43,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-06 20:49:43,900 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 [2021-08-06 20:49:43,901 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:43,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:43,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1542049478, now seen corresponding path program 116 times [2021-08-06 20:49:43,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:43,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199341129] [2021-08-06 20:49:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:43,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2582 backedges. 1335 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:45,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:45,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199341129] [2021-08-06 20:49:45,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199341129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:45,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808644324] [2021-08-06 20:49:45,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:49:45,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:45,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:45,409 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:45,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 20:49:56,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:49:56,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:56,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-06 20:49:56,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2582 backedges. 1335 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:59,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808644324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:59,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:59,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 93 [2021-08-06 20:49:59,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643178650] [2021-08-06 20:49:59,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-08-06 20:49:59,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:59,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-08-06 20:49:59,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1983, Invalid=6573, Unknown=0, NotChecked=0, Total=8556 [2021-08-06 20:49:59,098 INFO L87 Difference]: Start difference. First operand 392 states and 401 transitions. Second operand has 93 states, 93 states have (on average 3.096774193548387) internal successors, (288), 93 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:00,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:00,171 INFO L93 Difference]: Finished difference Result 667 states and 676 transitions. [2021-08-06 20:50:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-06 20:50:00,171 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.096774193548387) internal successors, (288), 93 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-08-06 20:50:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:00,172 INFO L225 Difference]: With dead ends: 667 [2021-08-06 20:50:00,172 INFO L226 Difference]: Without dead ends: 397 [2021-08-06 20:50:00,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 3553.4ms TimeCoverageRelationStatistics Valid=3502, Invalid=11750, Unknown=0, NotChecked=0, Total=15252 [2021-08-06 20:50:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-08-06 20:50:00,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2021-08-06 20:50:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.0253807106598984) internal successors, (404), 394 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 404 transitions. [2021-08-06 20:50:00,176 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 404 transitions. Word has length 199 [2021-08-06 20:50:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:00,176 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 404 transitions. [2021-08-06 20:50:00,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.096774193548387) internal successors, (288), 93 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 404 transitions. [2021-08-06 20:50:00,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-08-06 20:50:00,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:00,177 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:00,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 20:50:00,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:00,393 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash -283171988, now seen corresponding path program 117 times [2021-08-06 20:50:00,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:00,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913260613] [2021-08-06 20:50:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:00,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:03,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:50:03,179 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 47.2 percent of original size [2021-08-06 20:50:03,246 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:50:03,248 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.1 percent of original size [2021-08-06 20:50:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:03,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:03,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913260613] [2021-08-06 20:50:03,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913260613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:03,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470615285] [2021-08-06 20:50:03,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:50:03,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:03,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:03,366 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:03,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 20:50:05,449 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 [2021-08-06 20:50:05,449 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:50:06,499 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:50:06,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-06 20:50:06,529 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 0 [2021-08-06 20:50:06,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-08-06 20:50:06,700 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 203 with TraceHistMax 30,while executing Executor. [2021-08-06 20:50:06,701 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:50:06,701 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:50:06,702 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 20:50:06,718 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:50:06,719 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:50:06,721 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:50:06 BasicIcfg [2021-08-06 20:50:06,721 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:50:06,722 INFO L168 Benchmark]: Toolchain (without parser) took 869989.78 ms. Allocated memory was 127.9 MB in the beginning and 2.4 GB in the end (delta: 2.3 GB). Free memory was 107.4 MB in the beginning and 769.6 MB in the end (delta: -662.2 MB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. [2021-08-06 20:50:06,722 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 127.9 MB. Free memory was 108.6 MB in the beginning and 108.4 MB in the end (delta: 132.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:50:06,723 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.19 ms. Allocated memory is still 127.9 MB. Free memory was 107.2 MB in the beginning and 105.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:50:06,724 INFO L168 Benchmark]: Boogie Preprocessor took 15.46 ms. Allocated memory is still 127.9 MB. Free memory was 105.8 MB in the beginning and 104.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:50:06,724 INFO L168 Benchmark]: RCFGBuilder took 250.36 ms. Allocated memory is still 127.9 MB. Free memory was 104.8 MB in the beginning and 92.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:50:06,728 INFO L168 Benchmark]: TraceAbstraction took 869689.65 ms. Allocated memory was 127.9 MB in the beginning and 2.4 GB in the end (delta: 2.3 GB). Free memory was 91.5 MB in the beginning and 769.6 MB in the end (delta: -678.1 MB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. [2021-08-06 20:50:06,728 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 0.11 ms. Allocated memory is still 127.9 MB. Free memory was 108.6 MB in the beginning and 108.4 MB in the end (delta: 132.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.19 ms. Allocated memory is still 127.9 MB. Free memory was 107.2 MB in the beginning and 105.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.46 ms. Allocated memory is still 127.9 MB. Free memory was 105.8 MB in the beginning and 104.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 250.36 ms. Allocated memory is still 127.9 MB. Free memory was 104.8 MB in the beginning and 92.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 869689.65 ms. Allocated memory was 127.9 MB in the beginning and 2.4 GB in the end (delta: 2.3 GB). Free memory was 91.5 MB in the beginning and 769.6 MB in the end (delta: -678.1 MB). Peak memory consumption was 2.0 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: 700, positive: 662, positive conditional: 662, positive unconditional: 0, negative: 38, negative conditional: 38, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 681, positive: 662, positive conditional: 0, positive unconditional: 662, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 163, positive: 160, positive conditional: 0, positive unconditional: 160, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 163, positive: 160, positive conditional: 0, positive unconditional: 160, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 25, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 681, positive: 502, positive conditional: 0, positive unconditional: 502, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 163, unknown conditional: 0, unknown unconditional: 163] , Statistics on independence cache: Total cache size (in pairs): 163, Positive cache size: 160, Positive conditional cache size: 0, Positive unconditional cache size: 160, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Independence queries for same thread: 19 - 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: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 203 with TraceHistMax 30,while executing Executor. - TimeoutResultAtElement [Line: 61]: 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 203 with TraceHistMax 30,while executing Executor. - TimeoutResultAtElement [Line: 62]: 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 203 with TraceHistMax 30,while executing Executor. - TimeoutResultAtElement [Line: 61]: 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 203 with TraceHistMax 30,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 55 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 869553.8ms, OverallIterations: 122, TraceHistogramMax: 30, EmptinessCheckTime: 89.3ms, AutomataDifference: 84939.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 160.8ms, PartialOrderReductionTime: 143.5ms, HoareTripleCheckerStatistics: 7914 SDtfs, 13404 SDslu, 251188 SDs, 0 SdLazy, 138986 SolverSat, 3313 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44555.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18622 GetRequests, 11185 SyntacticMatches, 111 SemanticMatches, 7326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124539 ImplicationChecksByTransitivity, 176367.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=401occurred in iteration=119, InterpolantAutomatonStates: 4422, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 399.7ms AutomataMinimizationTime, 121 MinimizatonAttempts, 13949 StatesRemovedByMinimization, 120 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 898.5ms SsaConstructionTime, 4704.0ms SatisfiabilityAnalysisTime, 287564.0ms InterpolantComputationTime, 26473 NumberOfCodeBlocks, 26473 NumberOfCodeBlocksAsserted, 1146 NumberOfCheckSat, 26235 ConstructedInterpolants, 72 QuantifiedInterpolants, 245157 SizeOfPredicates, 477 NumberOfNonLiveVariables, 24013 ConjunctsInSsa, 6288 ConjunctsInUnsatCore, 238 InterpolantComputations, 4 PerfectInterpolantSequences, 53129/207179 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