/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 15:16:06,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 15:16:06,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 15:16:06,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 15:16:06,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 15:16:06,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 15:16:06,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 15:16:06,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-06 15:16:06,209 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 15:16:06,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 15:16:06,210 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 15:16:06,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 15:16:06,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 15:16:06,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 15:16:06,213 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 15:16:06,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 15:16:06,213 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 15:16:06,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 15:16:06,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 15:16:06,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 15:16:06,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 15:16:06,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 15:16:06,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 15:16:06,215 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 15:16:06,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 15:16:06,215 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 15:16:06,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 15:16:06,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 15:16:06,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 15:16:06,215 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 15:16:06,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 15:16:06,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:16:06,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 15:16:06,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 15:16:06,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 15:16:06,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 15:16:06,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 15:16:06,216 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 15:16:06,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 15:16:06,217 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 15:16:06,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 15:16:06,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 15:16:06,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 15:16:06,510 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 15:16:06,511 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 15:16:06,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl [2021-08-06 15:16:06,511 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl' [2021-08-06 15:16:06,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 15:16:06,563 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 15:16:06,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 15:16:06,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 15:16:06,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 15:16:06,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:16:06" (1/1) ... [2021-08-06 15:16:06,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:16:06" (1/1) ... [2021-08-06 15:16:06,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 15:16:06,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 15:16:06,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 15:16:06,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 15:16:06,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:16:06" (1/1) ... [2021-08-06 15:16:06,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:16:06" (1/1) ... [2021-08-06 15:16:06,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:16:06" (1/1) ... [2021-08-06 15:16:06,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:16:06" (1/1) ... [2021-08-06 15:16:06,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:16:06" (1/1) ... [2021-08-06 15:16:06,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:16:06" (1/1) ... [2021-08-06 15:16:06,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:16:06" (1/1) ... [2021-08-06 15:16:06,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 15:16:06,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 15:16:06,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 15:16:06,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 15:16:06,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:16:06" (1/1) ... [2021-08-06 15:16:06,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:16:06,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:06,630 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 15:16:06,647 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 15:16:06,666 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 15:16:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 15:16:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 15:16:06,667 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 15:16:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 15:16:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 15:16:06,667 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 15:16:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 15:16:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 15:16:06,667 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 15:16:06,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 15:16:06,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 15:16:06,668 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-06 15:16:06,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-06 15:16:06,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-06 15:16:06,669 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 15:16:06,877 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 15:16:06,877 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 15:16:06,878 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:16:06 BoogieIcfgContainer [2021-08-06 15:16:06,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 15:16:06,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 15:16:06,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 15:16:06,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 15:16:06,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:16:06" (1/2) ... [2021-08-06 15:16:06,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdecb2d and model type buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 03:16:06, skipping insertion in model container [2021-08-06 15:16:06,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:16:06" (2/2) ... [2021-08-06 15:16:06,883 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series.wvr.bpl [2021-08-06 15:16:06,887 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 15:16:06,887 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 15:16:06,887 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 15:16:06,887 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 15:16:06,950 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-06 15:16:06,989 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 15:16:06,994 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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 15:16:06,994 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-06 15:16:07,003 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-08-06 15:16:07,073 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:07,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 15:16:07,099 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:07,099 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:07,100 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:07,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:07,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1445873811, now seen corresponding path program 1 times [2021-08-06 15:16:07,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:07,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313928041] [2021-08-06 15:16:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:07,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:07,214 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 15:16:07,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:07,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313928041] [2021-08-06 15:16:07,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313928041] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:16:07,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:16:07,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 15:16:07,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141754932] [2021-08-06 15:16:07,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:16:07,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:07,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:16:07,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:16:07,235 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:07,291 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-08-06 15:16:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:16:07,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 15:16:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:07,316 INFO L225 Difference]: With dead ends: 1236 [2021-08-06 15:16:07,316 INFO L226 Difference]: Without dead ends: 1109 [2021-08-06 15:16:07,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:16:07,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-08-06 15:16:07,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-08-06 15:16:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-08-06 15:16:07,406 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-08-06 15:16:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:07,408 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-08-06 15:16:07,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:07,409 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-08-06 15:16:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 15:16:07,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:07,417 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] [2021-08-06 15:16:07,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 15:16:07,418 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:07,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:07,420 INFO L82 PathProgramCache]: Analyzing trace with hash 925045909, now seen corresponding path program 1 times [2021-08-06 15:16:07,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:07,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19045130] [2021-08-06 15:16:07,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:07,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:07,513 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 15:16:07,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:07,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19045130] [2021-08-06 15:16:07,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19045130] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:16:07,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:16:07,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:16:07,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540286410] [2021-08-06 15:16:07,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:16:07,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:07,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:16:07,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:16:07,517 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:07,571 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-08-06 15:16:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:16:07,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 15:16:07,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:07,580 INFO L225 Difference]: With dead ends: 1524 [2021-08-06 15:16:07,580 INFO L226 Difference]: Without dead ends: 1418 [2021-08-06 15:16:07,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:16:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-08-06 15:16:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-08-06 15:16:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:07,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-08-06 15:16:07,619 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-08-06 15:16:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:07,620 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-08-06 15:16:07,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-08-06 15:16:07,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 15:16:07,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:07,624 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] [2021-08-06 15:16:07,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 15:16:07,625 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1282496465, now seen corresponding path program 1 times [2021-08-06 15:16:07,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:07,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753837321] [2021-08-06 15:16:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:07,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:07,699 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 15:16:07,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:07,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753837321] [2021-08-06 15:16:07,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753837321] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:16:07,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:16:07,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:16:07,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349780711] [2021-08-06 15:16:07,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:16:07,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:07,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:16:07,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:16:07,703 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:07,751 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-08-06 15:16:07,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:16:07,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 15:16:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:07,768 INFO L225 Difference]: With dead ends: 2017 [2021-08-06 15:16:07,772 INFO L226 Difference]: Without dead ends: 1875 [2021-08-06 15:16:07,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:16:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-08-06 15:16:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-08-06 15:16:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-08-06 15:16:07,842 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-08-06 15:16:07,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:07,842 INFO L470 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-08-06 15:16:07,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-08-06 15:16:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:16:07,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:07,848 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] [2021-08-06 15:16:07,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 15:16:07,849 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:07,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:07,849 INFO L82 PathProgramCache]: Analyzing trace with hash 770950601, now seen corresponding path program 1 times [2021-08-06 15:16:07,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:07,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666623760] [2021-08-06 15:16:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:07,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:07,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:07,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666623760] [2021-08-06 15:16:07,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666623760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:07,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121272953] [2021-08-06 15:16:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:07,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:07,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:07,905 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 15:16:07,906 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 15:16:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:07,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 15:16:07,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:08,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121272953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:08,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:08,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-06 15:16:08,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431150414] [2021-08-06 15:16:08,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:16:08,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:08,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:16:08,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:16:08,282 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:08,409 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-08-06 15:16:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:16:08,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:16:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:08,420 INFO L225 Difference]: With dead ends: 2308 [2021-08-06 15:16:08,420 INFO L226 Difference]: Without dead ends: 2108 [2021-08-06 15:16:08,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:16:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-08-06 15:16:08,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-08-06 15:16:08,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-08-06 15:16:08,462 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-08-06 15:16:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:08,462 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-08-06 15:16:08,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:08,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-08-06 15:16:08,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:16:08,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:08,465 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] [2021-08-06 15:16:08,482 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 15:16:08,681 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 15:16:08,682 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:08,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:08,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1120776452, now seen corresponding path program 1 times [2021-08-06 15:16:08,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:08,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271369303] [2021-08-06 15:16:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:08,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:08,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:08,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271369303] [2021-08-06 15:16:08,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271369303] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:16:08,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:16:08,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:16:08,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972457412] [2021-08-06 15:16:08,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:16:08,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:08,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:16:08,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:16:08,710 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:08,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:08,778 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-08-06 15:16:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:16:08,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:16:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:08,787 INFO L225 Difference]: With dead ends: 1950 [2021-08-06 15:16:08,787 INFO L226 Difference]: Without dead ends: 1860 [2021-08-06 15:16:08,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:16:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-08-06 15:16:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-08-06 15:16:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-08-06 15:16:08,840 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-08-06 15:16:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:08,840 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-08-06 15:16:08,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-08-06 15:16:08,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:16:08,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:08,845 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] [2021-08-06 15:16:08,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 15:16:08,845 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash 712551812, now seen corresponding path program 2 times [2021-08-06 15:16:08,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:08,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627195541] [2021-08-06 15:16:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:08,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:08,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:08,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627195541] [2021-08-06 15:16:08,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627195541] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:16:08,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:16:08,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:16:08,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254881772] [2021-08-06 15:16:08,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:16:08,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:08,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:16:08,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:16:08,885 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:08,931 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-08-06 15:16:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:16:08,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:16:08,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:08,937 INFO L225 Difference]: With dead ends: 1308 [2021-08-06 15:16:08,938 INFO L226 Difference]: Without dead ends: 1308 [2021-08-06 15:16:08,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:16:08,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-08-06 15:16:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-08-06 15:16:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-08-06 15:16:08,961 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-08-06 15:16:08,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:08,962 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-08-06 15:16:08,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-08-06 15:16:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:16:08,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:08,964 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] [2021-08-06 15:16:08,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 15:16:08,964 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:08,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1043177095, now seen corresponding path program 2 times [2021-08-06 15:16:08,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:08,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497643737] [2021-08-06 15:16:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:08,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:09,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:09,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497643737] [2021-08-06 15:16:09,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497643737] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:16:09,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:16:09,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:16:09,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818076751] [2021-08-06 15:16:09,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:16:09,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:09,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:16:09,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:16:09,004 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:09,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:09,042 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-08-06 15:16:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:16:09,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:16:09,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:09,048 INFO L225 Difference]: With dead ends: 1142 [2021-08-06 15:16:09,048 INFO L226 Difference]: Without dead ends: 1120 [2021-08-06 15:16:09,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:16:09,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-08-06 15:16:09,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-08-06 15:16:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:09,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-08-06 15:16:09,072 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-08-06 15:16:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:09,072 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-08-06 15:16:09,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:09,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-08-06 15:16:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:16:09,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:09,075 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] [2021-08-06 15:16:09,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 15:16:09,076 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:09,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:09,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2066683916, now seen corresponding path program 1 times [2021-08-06 15:16:09,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:09,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574285625] [2021-08-06 15:16:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:09,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:16:09,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:09,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574285625] [2021-08-06 15:16:09,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574285625] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:16:09,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:16:09,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:16:09,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911275578] [2021-08-06 15:16:09,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:16:09,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:09,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:16:09,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:16:09,106 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:09,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:09,124 INFO L93 Difference]: Finished difference Result 1334 states and 4929 transitions. [2021-08-06 15:16:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:16:09,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:16:09,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:09,131 INFO L225 Difference]: With dead ends: 1334 [2021-08-06 15:16:09,131 INFO L226 Difference]: Without dead ends: 1334 [2021-08-06 15:16:09,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:16:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-08-06 15:16:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 954. [2021-08-06 15:16:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.63903462749213) internal successors, (3468), 953 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3468 transitions. [2021-08-06 15:16:09,156 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3468 transitions. Word has length 27 [2021-08-06 15:16:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:09,156 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 3468 transitions. [2021-08-06 15:16:09,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3468 transitions. [2021-08-06 15:16:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:16:09,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:09,159 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] [2021-08-06 15:16:09,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 15:16:09,159 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:09,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:09,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1787495248, now seen corresponding path program 1 times [2021-08-06 15:16:09,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:09,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658132587] [2021-08-06 15:16:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:09,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:09,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:09,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658132587] [2021-08-06 15:16:09,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658132587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:09,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853570178] [2021-08-06 15:16:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:09,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:09,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:09,185 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 15:16:09,208 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 15:16:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:09,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 15:16:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:09,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853570178] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:16:09,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 15:16:09,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-08-06 15:16:09,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032986632] [2021-08-06 15:16:09,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:16:09,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:09,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:16:09,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:16:09,381 INFO L87 Difference]: Start difference. First operand 954 states and 3468 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:09,408 INFO L93 Difference]: Finished difference Result 1658 states and 5999 transitions. [2021-08-06 15:16:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:16:09,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:16:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:09,416 INFO L225 Difference]: With dead ends: 1658 [2021-08-06 15:16:09,416 INFO L226 Difference]: Without dead ends: 1658 [2021-08-06 15:16:09,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:16:09,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-08-06 15:16:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1112. [2021-08-06 15:16:09,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.667866786678668) internal successors, (4075), 1111 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4075 transitions. [2021-08-06 15:16:09,442 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4075 transitions. Word has length 27 [2021-08-06 15:16:09,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:09,443 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 4075 transitions. [2021-08-06 15:16:09,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4075 transitions. [2021-08-06 15:16:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:16:09,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:09,445 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, 1] [2021-08-06 15:16:09,464 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 15:16:09,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-06 15:16:09,660 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:09,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:09,660 INFO L82 PathProgramCache]: Analyzing trace with hash -383422002, now seen corresponding path program 1 times [2021-08-06 15:16:09,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:09,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184444700] [2021-08-06 15:16:09,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:09,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:09,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:09,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184444700] [2021-08-06 15:16:09,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184444700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:09,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504652824] [2021-08-06 15:16:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:09,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:09,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:09,825 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 15:16:09,826 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 15:16:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:09,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:16:09,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:10,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 15:16:10,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-06 15:16:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:10,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504652824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:10,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:10,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-06 15:16:10,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942430563] [2021-08-06 15:16:10,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:16:10,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:10,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:16:10,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:16:10,337 INFO L87 Difference]: Start difference. First operand 1112 states and 4075 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:10,467 INFO L93 Difference]: Finished difference Result 2387 states and 8904 transitions. [2021-08-06 15:16:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:16:10,467 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:16:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:10,475 INFO L225 Difference]: With dead ends: 2387 [2021-08-06 15:16:10,475 INFO L226 Difference]: Without dead ends: 2308 [2021-08-06 15:16:10,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:16:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-08-06 15:16:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1550. [2021-08-06 15:16:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.7140090380890896) internal successors, (5753), 1549 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5753 transitions. [2021-08-06 15:16:10,512 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5753 transitions. Word has length 29 [2021-08-06 15:16:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:10,512 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5753 transitions. [2021-08-06 15:16:10,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5753 transitions. [2021-08-06 15:16:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:16:10,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:10,516 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, 1] [2021-08-06 15:16:10,539 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 15:16:10,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:10,739 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:10,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1158240516, now seen corresponding path program 2 times [2021-08-06 15:16:10,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:10,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547719702] [2021-08-06 15:16:10,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:10,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:10,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:10,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547719702] [2021-08-06 15:16:10,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547719702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:10,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704208284] [2021-08-06 15:16:10,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:16:10,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:10,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:10,873 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 15:16:10,908 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 15:16:10,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:16:10,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:10,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:16:10,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:11,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-06 15:16:11,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-06 15:16:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:11,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704208284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:11,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:11,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-06 15:16:11,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940913678] [2021-08-06 15:16:11,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:16:11,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:11,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:16:11,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:16:11,404 INFO L87 Difference]: Start difference. First operand 1550 states and 5753 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:11,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:11,523 INFO L93 Difference]: Finished difference Result 2792 states and 10515 transitions. [2021-08-06 15:16:11,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:16:11,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:16:11,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:11,533 INFO L225 Difference]: With dead ends: 2792 [2021-08-06 15:16:11,533 INFO L226 Difference]: Without dead ends: 2713 [2021-08-06 15:16:11,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:16:11,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-08-06 15:16:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 1749. [2021-08-06 15:16:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.7299771167048057) internal successors, (6520), 1748 states have internal predecessors, (6520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6520 transitions. [2021-08-06 15:16:11,574 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6520 transitions. Word has length 29 [2021-08-06 15:16:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:11,574 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 6520 transitions. [2021-08-06 15:16:11,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6520 transitions. [2021-08-06 15:16:11,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:16:11,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:11,579 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, 1] [2021-08-06 15:16:11,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-06 15:16:11,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:11,793 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:11,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:11,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1824203434, now seen corresponding path program 3 times [2021-08-06 15:16:11,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:11,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654976323] [2021-08-06 15:16:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:11,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:11,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:11,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654976323] [2021-08-06 15:16:11,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654976323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:11,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289323258] [2021-08-06 15:16:11,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:16:11,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:11,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:11,913 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 15:16:11,914 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 15:16:12,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:16:12,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:12,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:16:12,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:12,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-06 15:16:12,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-06 15:16:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:12,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289323258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:12,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:12,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-06 15:16:12,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399187558] [2021-08-06 15:16:12,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:16:12,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:12,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:16:12,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:16:12,370 INFO L87 Difference]: Start difference. First operand 1749 states and 6520 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 15:16:12,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:12,522 INFO L93 Difference]: Finished difference Result 2570 states and 9639 transitions. [2021-08-06 15:16:12,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:16:12,522 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 29 [2021-08-06 15:16:12,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:12,531 INFO L225 Difference]: With dead ends: 2570 [2021-08-06 15:16:12,531 INFO L226 Difference]: Without dead ends: 2491 [2021-08-06 15:16:12,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:16:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-08-06 15:16:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1887. [2021-08-06 15:16:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.7338282078472957) internal successors, (7042), 1886 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 7042 transitions. [2021-08-06 15:16:12,584 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 7042 transitions. Word has length 29 [2021-08-06 15:16:12,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:12,584 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 7042 transitions. [2021-08-06 15:16:12,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 15:16:12,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 7042 transitions. [2021-08-06 15:16:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:16:12,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:12,610 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, 1] [2021-08-06 15:16:12,631 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 15:16:12,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-06 15:16:12,825 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:12,825 INFO L82 PathProgramCache]: Analyzing trace with hash -614164824, now seen corresponding path program 4 times [2021-08-06 15:16:12,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:12,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005483506] [2021-08-06 15:16:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:12,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:12,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:12,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005483506] [2021-08-06 15:16:12,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005483506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:12,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323534583] [2021-08-06 15:16:12,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:16:12,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:12,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:12,949 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 15:16:12,968 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 15:16:13,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:16:13,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:13,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:16:13,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:13,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-06 15:16:13,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-06 15:16:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:13,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323534583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:13,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:13,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-06 15:16:13,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122135961] [2021-08-06 15:16:13,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:16:13,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:13,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:16:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:16:13,452 INFO L87 Difference]: Start difference. First operand 1887 states and 7042 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:13,620 INFO L93 Difference]: Finished difference Result 3006 states and 11331 transitions. [2021-08-06 15:16:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:16:13,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:16:13,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:13,629 INFO L225 Difference]: With dead ends: 3006 [2021-08-06 15:16:13,629 INFO L226 Difference]: Without dead ends: 2927 [2021-08-06 15:16:13,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:16:13,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-08-06 15:16:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2081. [2021-08-06 15:16:13,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.751923076923077) internal successors, (7804), 2080 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7804 transitions. [2021-08-06 15:16:13,676 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7804 transitions. Word has length 29 [2021-08-06 15:16:13,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:13,676 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 7804 transitions. [2021-08-06 15:16:13,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:13,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7804 transitions. [2021-08-06 15:16:13,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:16:13,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:13,680 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, 1] [2021-08-06 15:16:13,720 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 15:16:13,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:13,897 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:13,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:13,898 INFO L82 PathProgramCache]: Analyzing trace with hash -357509362, now seen corresponding path program 5 times [2021-08-06 15:16:13,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:13,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085313209] [2021-08-06 15:16:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:13,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:14,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:14,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085313209] [2021-08-06 15:16:14,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085313209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:14,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327043179] [2021-08-06 15:16:14,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:16:14,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:14,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:14,048 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 15:16:14,048 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 15:16:14,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:16:14,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:14,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:16:14,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:14,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-06 15:16:14,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-06 15:16:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:14,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327043179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:14,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:14,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-06 15:16:14,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768852441] [2021-08-06 15:16:14,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:16:14,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:14,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:16:14,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:16:14,637 INFO L87 Difference]: Start difference. First operand 2081 states and 7804 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 15:16:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:14,815 INFO L93 Difference]: Finished difference Result 2784 states and 10455 transitions. [2021-08-06 15:16:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:16:14,816 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 29 [2021-08-06 15:16:14,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:14,825 INFO L225 Difference]: With dead ends: 2784 [2021-08-06 15:16:14,825 INFO L226 Difference]: Without dead ends: 2705 [2021-08-06 15:16:14,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:16:14,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2021-08-06 15:16:14,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1882. [2021-08-06 15:16:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.741095162147794) internal successors, (7037), 1881 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 7037 transitions. [2021-08-06 15:16:14,875 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 7037 transitions. Word has length 29 [2021-08-06 15:16:14,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:14,875 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 7037 transitions. [2021-08-06 15:16:14,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 15:16:14,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 7037 transitions. [2021-08-06 15:16:14,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:16:14,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:14,879 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, 1] [2021-08-06 15:16:14,897 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 15:16:15,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:15,093 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:15,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:15,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1162136574, now seen corresponding path program 6 times [2021-08-06 15:16:15,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:15,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385444139] [2021-08-06 15:16:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:15,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:15,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:15,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385444139] [2021-08-06 15:16:15,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385444139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:15,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677904816] [2021-08-06 15:16:15,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:16:15,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:15,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:15,229 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 15:16:15,238 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 15:16:15,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:16:15,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:15,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:16:15,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:15,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-06 15:16:15,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-06 15:16:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:15,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677904816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:15,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:15,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-06 15:16:15,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174867230] [2021-08-06 15:16:15,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:16:15,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:15,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:16:15,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:16:15,748 INFO L87 Difference]: Start difference. First operand 1882 states and 7037 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:15,950 INFO L93 Difference]: Finished difference Result 2657 states and 9932 transitions. [2021-08-06 15:16:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:16:15,950 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:16:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:15,959 INFO L225 Difference]: With dead ends: 2657 [2021-08-06 15:16:15,959 INFO L226 Difference]: Without dead ends: 2578 [2021-08-06 15:16:15,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:16:15,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-08-06 15:16:15,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1926. [2021-08-06 15:16:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.7314285714285713) internal successors, (7183), 1925 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7183 transitions. [2021-08-06 15:16:16,003 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7183 transitions. Word has length 29 [2021-08-06 15:16:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:16,004 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 7183 transitions. [2021-08-06 15:16:16,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7183 transitions. [2021-08-06 15:16:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:16:16,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:16,008 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:16,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 15:16:16,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 15:16:16,221 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:16,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:16,221 INFO L82 PathProgramCache]: Analyzing trace with hash 719206604, now seen corresponding path program 7 times [2021-08-06 15:16:16,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:16,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199145251] [2021-08-06 15:16:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:16,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:16,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:16,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199145251] [2021-08-06 15:16:16,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199145251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:16,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680363305] [2021-08-06 15:16:16,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:16:16,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:16,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:16,266 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 15:16:16,280 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 15:16:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:16,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 15:16:16,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:16,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680363305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:16,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:16,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-06 15:16:16,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137239262] [2021-08-06 15:16:16,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:16:16,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:16,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:16:16,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:16:16,595 INFO L87 Difference]: Start difference. First operand 1926 states and 7183 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:16,662 INFO L93 Difference]: Finished difference Result 3472 states and 12599 transitions. [2021-08-06 15:16:16,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:16:16,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:16:16,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:16,672 INFO L225 Difference]: With dead ends: 3472 [2021-08-06 15:16:16,672 INFO L226 Difference]: Without dead ends: 3318 [2021-08-06 15:16:16,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:16:16,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2021-08-06 15:16:16,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2796. [2021-08-06 15:16:16,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 3.759212880143113) internal successors, (10507), 2795 states have internal predecessors, (10507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 10507 transitions. [2021-08-06 15:16:16,728 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 10507 transitions. Word has length 31 [2021-08-06 15:16:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:16,728 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 10507 transitions. [2021-08-06 15:16:16,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:16,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 10507 transitions. [2021-08-06 15:16:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:16:16,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:16,734 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:16,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-06 15:16:16,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 15:16:16,951 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:16,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1293130992, now seen corresponding path program 8 times [2021-08-06 15:16:16,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:16,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011310505] [2021-08-06 15:16:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:16,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:16:16,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:16,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011310505] [2021-08-06 15:16:16,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011310505] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:16:16,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:16:16,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:16:16,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83925436] [2021-08-06 15:16:16,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:16:16,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:16,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:16:16,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:16:16,974 INFO L87 Difference]: Start difference. First operand 2796 states and 10507 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:17,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:17,024 INFO L93 Difference]: Finished difference Result 5761 states and 21881 transitions. [2021-08-06 15:16:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:16:17,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:16:17,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:17,037 INFO L225 Difference]: With dead ends: 5761 [2021-08-06 15:16:17,037 INFO L226 Difference]: Without dead ends: 5510 [2021-08-06 15:16:17,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:16:17,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2021-08-06 15:16:17,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 4894. [2021-08-06 15:16:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4894 states, 4893 states have (on average 3.8779889638258735) internal successors, (18975), 4893 states have internal predecessors, (18975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 18975 transitions. [2021-08-06 15:16:17,142 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 18975 transitions. Word has length 31 [2021-08-06 15:16:17,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:17,142 INFO L470 AbstractCegarLoop]: Abstraction has 4894 states and 18975 transitions. [2021-08-06 15:16:17,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:17,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 18975 transitions. [2021-08-06 15:16:17,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:16:17,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:17,153 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:17,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-06 15:16:17,153 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:17,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:17,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1002043648, now seen corresponding path program 9 times [2021-08-06 15:16:17,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:17,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893489315] [2021-08-06 15:16:17,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:17,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:16:17,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:17,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893489315] [2021-08-06 15:16:17,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893489315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:17,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616930585] [2021-08-06 15:16:17,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:16:17,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:17,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:17,186 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 15:16:17,212 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 15:16:17,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:16:17,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:17,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:16:17,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:16:17,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616930585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:17,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:17,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 15:16:17,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867780268] [2021-08-06 15:16:17,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:16:17,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:17,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:16:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:16:17,664 INFO L87 Difference]: Start difference. First operand 4894 states and 18975 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 15:16:17,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:17,988 INFO L93 Difference]: Finished difference Result 17927 states and 66398 transitions. [2021-08-06 15:16:17,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:16:17,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 34 [2021-08-06 15:16:17,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:18,032 INFO L225 Difference]: With dead ends: 17927 [2021-08-06 15:16:18,032 INFO L226 Difference]: Without dead ends: 15301 [2021-08-06 15:16:18,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:16:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2021-08-06 15:16:18,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 8354. [2021-08-06 15:16:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 8353 states have (on average 3.950676403687298) internal successors, (33000), 8353 states have internal predecessors, (33000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 33000 transitions. [2021-08-06 15:16:18,345 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 33000 transitions. Word has length 34 [2021-08-06 15:16:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:18,346 INFO L470 AbstractCegarLoop]: Abstraction has 8354 states and 33000 transitions. [2021-08-06 15:16:18,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 15:16:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 33000 transitions. [2021-08-06 15:16:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:16:18,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:18,366 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:18,384 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 15:16:18,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 15:16:18,577 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:18,577 INFO L82 PathProgramCache]: Analyzing trace with hash -129967119, now seen corresponding path program 10 times [2021-08-06 15:16:18,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:18,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276266161] [2021-08-06 15:16:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:18,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:16:18,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:18,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276266161] [2021-08-06 15:16:18,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276266161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:18,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040502699] [2021-08-06 15:16:18,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:16:18,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:18,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:18,673 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 15:16:18,696 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 15:16:18,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:16:18,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:18,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:16:18,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:16:19,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040502699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:19,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:19,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 15:16:19,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788638202] [2021-08-06 15:16:19,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:16:19,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:19,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:16:19,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:16:19,149 INFO L87 Difference]: Start difference. First operand 8354 states and 33000 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:19,537 INFO L93 Difference]: Finished difference Result 21371 states and 81454 transitions. [2021-08-06 15:16:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:16:19,537 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:16:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:19,598 INFO L225 Difference]: With dead ends: 21371 [2021-08-06 15:16:19,598 INFO L226 Difference]: Without dead ends: 20932 [2021-08-06 15:16:19,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:16:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20932 states. [2021-08-06 15:16:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20932 to 12631. [2021-08-06 15:16:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12631 states, 12630 states have (on average 4.037925574030087) internal successors, (50999), 12630 states have internal predecessors, (50999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 50999 transitions. [2021-08-06 15:16:20,125 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 50999 transitions. Word has length 34 [2021-08-06 15:16:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:20,125 INFO L470 AbstractCegarLoop]: Abstraction has 12631 states and 50999 transitions. [2021-08-06 15:16:20,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 50999 transitions. [2021-08-06 15:16:20,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:16:20,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:20,158 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:20,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 15:16:20,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:20,373 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:20,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1761367056, now seen corresponding path program 11 times [2021-08-06 15:16:20,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:20,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657503094] [2021-08-06 15:16:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:20,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:20,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:20,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657503094] [2021-08-06 15:16:20,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657503094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:20,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114226139] [2021-08-06 15:16:20,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:16:20,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:20,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:20,401 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 15:16:20,407 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 15:16:20,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:16:20,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:20,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:16:20,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:20,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114226139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:20,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:20,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-06 15:16:20,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650675279] [2021-08-06 15:16:20,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:16:20,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:20,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:16:20,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:16:20,953 INFO L87 Difference]: Start difference. First operand 12631 states and 50999 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:21,260 INFO L93 Difference]: Finished difference Result 20596 states and 79596 transitions. [2021-08-06 15:16:21,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:16:21,261 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:16:21,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:21,329 INFO L225 Difference]: With dead ends: 20596 [2021-08-06 15:16:21,329 INFO L226 Difference]: Without dead ends: 20518 [2021-08-06 15:16:21,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:16:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20518 states. [2021-08-06 15:16:21,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 12577. [2021-08-06 15:16:21,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12577 states, 12576 states have (on average 4.042064249363868) internal successors, (50833), 12576 states have internal predecessors, (50833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12577 states to 12577 states and 50833 transitions. [2021-08-06 15:16:21,763 INFO L78 Accepts]: Start accepts. Automaton has 12577 states and 50833 transitions. Word has length 34 [2021-08-06 15:16:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:21,763 INFO L470 AbstractCegarLoop]: Abstraction has 12577 states and 50833 transitions. [2021-08-06 15:16:21,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 12577 states and 50833 transitions. [2021-08-06 15:16:21,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:16:21,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:21,792 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:21,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-06 15:16:21,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:21,997 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:21,997 INFO L82 PathProgramCache]: Analyzing trace with hash -447820591, now seen corresponding path program 12 times [2021-08-06 15:16:21,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:21,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149555041] [2021-08-06 15:16:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:21,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:22,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:22,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149555041] [2021-08-06 15:16:22,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149555041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:22,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848393616] [2021-08-06 15:16:22,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:16:22,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:22,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:22,033 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 15:16:22,034 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 15:16:22,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:16:22,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:22,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:16:22,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:22,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848393616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:22,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:22,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-06 15:16:22,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193338534] [2021-08-06 15:16:22,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:16:22,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:22,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:16:22,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:16:22,602 INFO L87 Difference]: Start difference. First operand 12577 states and 50833 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:22,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:22,900 INFO L93 Difference]: Finished difference Result 22733 states and 87606 transitions. [2021-08-06 15:16:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:16:22,900 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:16:22,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:22,965 INFO L225 Difference]: With dead ends: 22733 [2021-08-06 15:16:22,965 INFO L226 Difference]: Without dead ends: 21028 [2021-08-06 15:16:22,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:16:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2021-08-06 15:16:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 15386. [2021-08-06 15:16:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15386 states, 15385 states have (on average 4.0534936626584335) internal successors, (62363), 15385 states have internal predecessors, (62363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 62363 transitions. [2021-08-06 15:16:23,405 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 62363 transitions. Word has length 34 [2021-08-06 15:16:23,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:23,405 INFO L470 AbstractCegarLoop]: Abstraction has 15386 states and 62363 transitions. [2021-08-06 15:16:23,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 62363 transitions. [2021-08-06 15:16:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:16:23,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:23,435 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:23,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 15:16:23,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-06 15:16:23,637 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:23,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1932805376, now seen corresponding path program 13 times [2021-08-06 15:16:23,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:23,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283349332] [2021-08-06 15:16:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:23,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:23,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:23,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283349332] [2021-08-06 15:16:23,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283349332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:23,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624951857] [2021-08-06 15:16:23,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:16:23,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:23,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:23,675 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 15:16:23,675 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 15:16:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:24,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:16:24,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:24,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624951857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:24,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:24,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 15:16:24,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194710628] [2021-08-06 15:16:24,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:16:24,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:24,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:16:24,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:16:24,258 INFO L87 Difference]: Start difference. First operand 15386 states and 62363 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:24,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:24,708 INFO L93 Difference]: Finished difference Result 31402 states and 124083 transitions. [2021-08-06 15:16:24,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:16:24,709 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:16:24,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:24,812 INFO L225 Difference]: With dead ends: 31402 [2021-08-06 15:16:24,812 INFO L226 Difference]: Without dead ends: 31094 [2021-08-06 15:16:24,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:16:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31094 states. [2021-08-06 15:16:25,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31094 to 19812. [2021-08-06 15:16:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19812 states, 19811 states have (on average 4.119024784210792) internal successors, (81602), 19811 states have internal predecessors, (81602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:25,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19812 states to 19812 states and 81602 transitions. [2021-08-06 15:16:25,436 INFO L78 Accepts]: Start accepts. Automaton has 19812 states and 81602 transitions. Word has length 34 [2021-08-06 15:16:25,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:25,437 INFO L470 AbstractCegarLoop]: Abstraction has 19812 states and 81602 transitions. [2021-08-06 15:16:25,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:25,437 INFO L276 IsEmpty]: Start isEmpty. Operand 19812 states and 81602 transitions. [2021-08-06 15:16:25,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:16:25,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:25,478 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:25,496 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 15:16:25,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:25,679 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:25,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:25,679 INFO L82 PathProgramCache]: Analyzing trace with hash 19813248, now seen corresponding path program 14 times [2021-08-06 15:16:25,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:25,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497013573] [2021-08-06 15:16:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:25,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:16:25,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:25,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497013573] [2021-08-06 15:16:25,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497013573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:25,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322532799] [2021-08-06 15:16:25,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:16:25,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:25,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:25,817 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 15:16:25,819 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 15:16:26,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:16:26,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:26,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:16:26,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:26,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322532799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:26,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:26,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-06 15:16:26,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153763146] [2021-08-06 15:16:26,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:16:26,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:26,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:16:26,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:16:26,343 INFO L87 Difference]: Start difference. First operand 19812 states and 81602 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:26,770 INFO L93 Difference]: Finished difference Result 33709 states and 133959 transitions. [2021-08-06 15:16:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:16:26,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:16:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:26,879 INFO L225 Difference]: With dead ends: 33709 [2021-08-06 15:16:26,879 INFO L226 Difference]: Without dead ends: 32656 [2021-08-06 15:16:26,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:16:26,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32656 states. [2021-08-06 15:16:27,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32656 to 23355. [2021-08-06 15:16:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23355 states, 23354 states have (on average 4.114370129314036) internal successors, (96087), 23354 states have internal predecessors, (96087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:27,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23355 states to 23355 states and 96087 transitions. [2021-08-06 15:16:27,614 INFO L78 Accepts]: Start accepts. Automaton has 23355 states and 96087 transitions. Word has length 34 [2021-08-06 15:16:27,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:27,614 INFO L470 AbstractCegarLoop]: Abstraction has 23355 states and 96087 transitions. [2021-08-06 15:16:27,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:27,614 INFO L276 IsEmpty]: Start isEmpty. Operand 23355 states and 96087 transitions. [2021-08-06 15:16:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:16:27,673 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:27,673 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:27,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 15:16:27,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:27,874 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:27,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:27,874 INFO L82 PathProgramCache]: Analyzing trace with hash -650007193, now seen corresponding path program 15 times [2021-08-06 15:16:27,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:27,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598396612] [2021-08-06 15:16:27,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:27,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:16:27,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:27,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598396612] [2021-08-06 15:16:27,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598396612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:27,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629609607] [2021-08-06 15:16:27,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:16:27,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:27,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:27,914 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 15:16:27,915 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 15:16:28,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:16:28,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:28,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:16:28,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:28,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629609607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:28,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:28,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-06 15:16:28,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101220961] [2021-08-06 15:16:28,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:16:28,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:28,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:16:28,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:16:28,587 INFO L87 Difference]: Start difference. First operand 23355 states and 96087 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 15:16:29,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:29,067 INFO L93 Difference]: Finished difference Result 31214 states and 125510 transitions. [2021-08-06 15:16:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:16:29,067 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:16:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:29,166 INFO L225 Difference]: With dead ends: 31214 [2021-08-06 15:16:29,166 INFO L226 Difference]: Without dead ends: 31106 [2021-08-06 15:16:29,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:16:29,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31106 states. [2021-08-06 15:16:29,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31106 to 24543. [2021-08-06 15:16:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24543 states, 24542 states have (on average 4.135033819574606) internal successors, (101482), 24542 states have internal predecessors, (101482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24543 states to 24543 states and 101482 transitions. [2021-08-06 15:16:29,788 INFO L78 Accepts]: Start accepts. Automaton has 24543 states and 101482 transitions. Word has length 34 [2021-08-06 15:16:29,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:29,788 INFO L470 AbstractCegarLoop]: Abstraction has 24543 states and 101482 transitions. [2021-08-06 15:16:29,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 15:16:29,788 INFO L276 IsEmpty]: Start isEmpty. Operand 24543 states and 101482 transitions. [2021-08-06 15:16:29,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:16:29,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:29,840 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:29,857 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 15:16:30,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-06 15:16:30,041 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:30,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:30,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2144646697, now seen corresponding path program 16 times [2021-08-06 15:16:30,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:30,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919178218] [2021-08-06 15:16:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:30,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-06 15:16:30,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:30,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919178218] [2021-08-06 15:16:30,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919178218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:30,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980181393] [2021-08-06 15:16:30,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:16:30,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:30,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:30,069 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 15:16:30,072 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 15:16:30,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:16:30,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:30,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:16:30,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-06 15:16:30,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980181393] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:16:30,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 15:16:30,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-08-06 15:16:30,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564253548] [2021-08-06 15:16:30,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:16:30,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:30,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:16:30,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:16:30,537 INFO L87 Difference]: Start difference. First operand 24543 states and 101482 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:30,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:30,851 INFO L93 Difference]: Finished difference Result 29524 states and 121533 transitions. [2021-08-06 15:16:30,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:16:30,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:16:30,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:30,955 INFO L225 Difference]: With dead ends: 29524 [2021-08-06 15:16:30,955 INFO L226 Difference]: Without dead ends: 29524 [2021-08-06 15:16:30,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:16:30,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29524 states. [2021-08-06 15:16:31,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29524 to 22120. [2021-08-06 15:16:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22120 states, 22119 states have (on average 4.096252090962521) internal successors, (90605), 22119 states have internal predecessors, (90605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22120 states to 22120 states and 90605 transitions. [2021-08-06 15:16:31,572 INFO L78 Accepts]: Start accepts. Automaton has 22120 states and 90605 transitions. Word has length 37 [2021-08-06 15:16:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:31,572 INFO L470 AbstractCegarLoop]: Abstraction has 22120 states and 90605 transitions. [2021-08-06 15:16:31,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:31,572 INFO L276 IsEmpty]: Start isEmpty. Operand 22120 states and 90605 transitions. [2021-08-06 15:16:31,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:16:31,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:31,619 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:31,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 15:16:31,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:31,819 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:31,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:31,820 INFO L82 PathProgramCache]: Analyzing trace with hash -461619199, now seen corresponding path program 17 times [2021-08-06 15:16:31,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:31,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857272330] [2021-08-06 15:16:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:31,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-06 15:16:31,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:31,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857272330] [2021-08-06 15:16:31,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857272330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:31,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040878864] [2021-08-06 15:16:31,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:16:31,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:31,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:31,853 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 15:16:31,854 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 15:16:32,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:16:32,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:32,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:16:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-06 15:16:32,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040878864] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:16:32,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 15:16:32,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-08-06 15:16:32,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309671506] [2021-08-06 15:16:32,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:16:32,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:32,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:16:32,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:16:32,462 INFO L87 Difference]: Start difference. First operand 22120 states and 90605 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:32,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:32,699 INFO L93 Difference]: Finished difference Result 30000 states and 123549 transitions. [2021-08-06 15:16:32,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:16:32,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:16:32,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:32,791 INFO L225 Difference]: With dead ends: 30000 [2021-08-06 15:16:32,791 INFO L226 Difference]: Without dead ends: 30000 [2021-08-06 15:16:32,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:16:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30000 states. [2021-08-06 15:16:33,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30000 to 24376. [2021-08-06 15:16:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24376 states, 24375 states have (on average 4.091979487179487) internal successors, (99742), 24375 states have internal predecessors, (99742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24376 states to 24376 states and 99742 transitions. [2021-08-06 15:16:33,391 INFO L78 Accepts]: Start accepts. Automaton has 24376 states and 99742 transitions. Word has length 37 [2021-08-06 15:16:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:33,391 INFO L470 AbstractCegarLoop]: Abstraction has 24376 states and 99742 transitions. [2021-08-06 15:16:33,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 24376 states and 99742 transitions. [2021-08-06 15:16:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:16:33,441 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:33,441 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:33,457 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 15:16:33,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:33,641 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash -857424067, now seen corresponding path program 18 times [2021-08-06 15:16:33,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:33,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260247438] [2021-08-06 15:16:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:33,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 15:16:33,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:33,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260247438] [2021-08-06 15:16:33,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260247438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:33,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793110490] [2021-08-06 15:16:33,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:16:33,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:33,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:33,679 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 15:16:33,689 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 15:16:34,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:16:34,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:34,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:16:34,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 15:16:34,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793110490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:34,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:34,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-06 15:16:34,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885863407] [2021-08-06 15:16:34,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:16:34,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:34,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:16:34,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:16:34,324 INFO L87 Difference]: Start difference. First operand 24376 states and 99742 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:34,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:34,572 INFO L93 Difference]: Finished difference Result 37294 states and 154370 transitions. [2021-08-06 15:16:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:16:34,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:16:34,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:34,713 INFO L225 Difference]: With dead ends: 37294 [2021-08-06 15:16:34,713 INFO L226 Difference]: Without dead ends: 37294 [2021-08-06 15:16:34,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:16:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37294 states. [2021-08-06 15:16:35,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37294 to 34517. [2021-08-06 15:16:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34517 states, 34516 states have (on average 4.136226677482907) internal successors, (142766), 34516 states have internal predecessors, (142766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34517 states to 34517 states and 142766 transitions. [2021-08-06 15:16:35,801 INFO L78 Accepts]: Start accepts. Automaton has 34517 states and 142766 transitions. Word has length 37 [2021-08-06 15:16:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:35,801 INFO L470 AbstractCegarLoop]: Abstraction has 34517 states and 142766 transitions. [2021-08-06 15:16:35,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 34517 states and 142766 transitions. [2021-08-06 15:16:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:16:35,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:35,884 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:35,901 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 15:16:36,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:36,084 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:36,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:36,085 INFO L82 PathProgramCache]: Analyzing trace with hash -709164033, now seen corresponding path program 19 times [2021-08-06 15:16:36,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:36,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715640649] [2021-08-06 15:16:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:36,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:36,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:36,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715640649] [2021-08-06 15:16:36,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715640649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:36,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081617690] [2021-08-06 15:16:36,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:16:36,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:36,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:36,747 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 15:16:36,748 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 15:16:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:37,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:16:37,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:37,589 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:16:37,590 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 28 treesize of output 16 [2021-08-06 15:16:37,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 15:16:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:37,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081617690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:37,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:37,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:16:37,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895833829] [2021-08-06 15:16:37,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:16:37,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:37,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:16:37,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:16:37,950 INFO L87 Difference]: Start difference. First operand 34517 states and 142766 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:39,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:39,580 INFO L93 Difference]: Finished difference Result 62289 states and 254360 transitions. [2021-08-06 15:16:39,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:16:39,580 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:16:39,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:39,836 INFO L225 Difference]: With dead ends: 62289 [2021-08-06 15:16:39,836 INFO L226 Difference]: Without dead ends: 62097 [2021-08-06 15:16:39,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 938.8ms TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:16:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62097 states. [2021-08-06 15:16:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62097 to 34913. [2021-08-06 15:16:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34913 states, 34912 states have (on average 4.134910632447296) internal successors, (144358), 34912 states have internal predecessors, (144358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34913 states to 34913 states and 144358 transitions. [2021-08-06 15:16:41,271 INFO L78 Accepts]: Start accepts. Automaton has 34913 states and 144358 transitions. Word has length 39 [2021-08-06 15:16:41,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:41,271 INFO L470 AbstractCegarLoop]: Abstraction has 34913 states and 144358 transitions. [2021-08-06 15:16:41,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 34913 states and 144358 transitions. [2021-08-06 15:16:41,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:16:41,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:41,363 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:41,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-06 15:16:41,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 15:16:41,564 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:41,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:41,564 INFO L82 PathProgramCache]: Analyzing trace with hash -943081597, now seen corresponding path program 20 times [2021-08-06 15:16:41,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:41,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911078052] [2021-08-06 15:16:41,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:41,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:42,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:42,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911078052] [2021-08-06 15:16:42,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911078052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:42,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213503923] [2021-08-06 15:16:42,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:16:42,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:42,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:42,173 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 15:16:42,196 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 15:16:42,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:16:42,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:42,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:16:42,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:43,058 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:16:43,058 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 28 treesize of output 16 [2021-08-06 15:16:43,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 15:16:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:43,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213503923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:43,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:43,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:16:43,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12351247] [2021-08-06 15:16:43,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:16:43,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:43,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:16:43,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:16:43,399 INFO L87 Difference]: Start difference. First operand 34913 states and 144358 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:45,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:45,316 INFO L93 Difference]: Finished difference Result 63409 states and 258944 transitions. [2021-08-06 15:16:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 15:16:45,317 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:16:45,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:45,570 INFO L225 Difference]: With dead ends: 63409 [2021-08-06 15:16:45,571 INFO L226 Difference]: Without dead ends: 63193 [2021-08-06 15:16:45,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1046.1ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:16:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63193 states. [2021-08-06 15:16:46,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63193 to 35063. [2021-08-06 15:16:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35063 states, 35062 states have (on average 4.133534881067822) internal successors, (144930), 35062 states have internal predecessors, (144930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35063 states to 35063 states and 144930 transitions. [2021-08-06 15:16:46,770 INFO L78 Accepts]: Start accepts. Automaton has 35063 states and 144930 transitions. Word has length 39 [2021-08-06 15:16:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:46,770 INFO L470 AbstractCegarLoop]: Abstraction has 35063 states and 144930 transitions. [2021-08-06 15:16:46,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 35063 states and 144930 transitions. [2021-08-06 15:16:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:16:46,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:46,849 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:46,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-06 15:16:47,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 15:16:47,049 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:47,050 INFO L82 PathProgramCache]: Analyzing trace with hash 868774019, now seen corresponding path program 21 times [2021-08-06 15:16:47,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:47,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417213862] [2021-08-06 15:16:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:47,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:47,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:47,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417213862] [2021-08-06 15:16:47,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417213862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:47,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831406164] [2021-08-06 15:16:47,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:16:47,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:47,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:47,690 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 15:16:47,690 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 15:16:48,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:16:48,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:48,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 15:16:48,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:48,769 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-08-06 15:16:48,769 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 38 treesize of output 44 [2021-08-06 15:16:49,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:16:49,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-08-06 15:16:49,261 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-08-06 15:16:49,261 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 41 treesize of output 47 [2021-08-06 15:16:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:49,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831406164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:49,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:49,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-06 15:16:49,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440277652] [2021-08-06 15:16:49,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:16:49,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:49,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:16:49,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:16:49,559 INFO L87 Difference]: Start difference. First operand 35063 states and 144930 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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 15:16:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:52,086 INFO L93 Difference]: Finished difference Result 61244 states and 248903 transitions. [2021-08-06 15:16:52,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:16:52,087 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:16:52,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:52,436 INFO L225 Difference]: With dead ends: 61244 [2021-08-06 15:16:52,436 INFO L226 Difference]: Without dead ends: 61134 [2021-08-06 15:16:52,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1877.6ms TimeCoverageRelationStatistics Valid=668, Invalid=2638, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:16:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61134 states. [2021-08-06 15:16:53,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61134 to 35258. [2021-08-06 15:16:53,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35258 states, 35257 states have (on average 4.134583203335508) internal successors, (145773), 35257 states have internal predecessors, (145773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35258 states to 35258 states and 145773 transitions. [2021-08-06 15:16:53,662 INFO L78 Accepts]: Start accepts. Automaton has 35258 states and 145773 transitions. Word has length 39 [2021-08-06 15:16:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:53,662 INFO L470 AbstractCegarLoop]: Abstraction has 35258 states and 145773 transitions. [2021-08-06 15:16:53,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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 15:16:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 35258 states and 145773 transitions. [2021-08-06 15:16:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:16:53,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:53,753 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:53,772 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 15:16:53,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:53,954 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:53,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:53,954 INFO L82 PathProgramCache]: Analyzing trace with hash -813062891, now seen corresponding path program 22 times [2021-08-06 15:16:53,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:53,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8255528] [2021-08-06 15:16:53,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:53,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:54,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:54,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8255528] [2021-08-06 15:16:54,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8255528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:54,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730783787] [2021-08-06 15:16:54,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:16:54,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:54,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:54,381 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 15:16:54,382 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 15:16:55,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:16:55,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:55,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:16:55,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:55,479 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:16:55,479 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 28 treesize of output 16 [2021-08-06 15:16:55,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-06 15:16:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:55,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730783787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:55,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:55,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:16:55,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659773841] [2021-08-06 15:16:55,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:16:55,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:55,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:16:55,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:16:55,785 INFO L87 Difference]: Start difference. First operand 35258 states and 145773 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:57,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:57,431 INFO L93 Difference]: Finished difference Result 81375 states and 332127 transitions. [2021-08-06 15:16:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:16:57,432 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:16:57,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:57,931 INFO L225 Difference]: With dead ends: 81375 [2021-08-06 15:16:57,931 INFO L226 Difference]: Without dead ends: 81320 [2021-08-06 15:16:57,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 926.2ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:16:58,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81320 states. [2021-08-06 15:16:59,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81320 to 35753. [2021-08-06 15:16:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35753 states, 35752 states have (on average 4.141138957261132) internal successors, (148054), 35752 states have internal predecessors, (148054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35753 states to 35753 states and 148054 transitions. [2021-08-06 15:16:59,278 INFO L78 Accepts]: Start accepts. Automaton has 35753 states and 148054 transitions. Word has length 39 [2021-08-06 15:16:59,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:59,278 INFO L470 AbstractCegarLoop]: Abstraction has 35753 states and 148054 transitions. [2021-08-06 15:16:59,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 35753 states and 148054 transitions. [2021-08-06 15:16:59,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:16:59,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:59,363 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:59,380 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 15:16:59,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:59,569 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:59,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:59,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1038211985, now seen corresponding path program 23 times [2021-08-06 15:16:59,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:59,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182201248] [2021-08-06 15:16:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:59,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:00,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:00,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182201248] [2021-08-06 15:17:00,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182201248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:00,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687742680] [2021-08-06 15:17:00,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:17:00,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:00,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:00,186 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 15:17:00,186 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 15:17:00,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:17:00,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:00,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:17:00,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:01,210 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-08-06 15:17:01,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 54 [2021-08-06 15:17:01,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 15:17:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:01,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687742680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:01,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:01,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-08-06 15:17:01,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608450306] [2021-08-06 15:17:01,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:17:01,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:17:01,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:17:01,647 INFO L87 Difference]: Start difference. First operand 35753 states and 148054 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:03,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:03,696 INFO L93 Difference]: Finished difference Result 61389 states and 250239 transitions. [2021-08-06 15:17:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:17:03,696 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:17:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:03,938 INFO L225 Difference]: With dead ends: 61389 [2021-08-06 15:17:03,938 INFO L226 Difference]: Without dead ends: 61187 [2021-08-06 15:17:03,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1573.6ms TimeCoverageRelationStatistics Valid=434, Invalid=2428, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:17:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61187 states. [2021-08-06 15:17:04,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61187 to 36168. [2021-08-06 15:17:04,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36168 states, 36167 states have (on average 4.135427323250477) internal successors, (149566), 36167 states have internal predecessors, (149566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36168 states to 36168 states and 149566 transitions. [2021-08-06 15:17:05,096 INFO L78 Accepts]: Start accepts. Automaton has 36168 states and 149566 transitions. Word has length 39 [2021-08-06 15:17:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:05,096 INFO L470 AbstractCegarLoop]: Abstraction has 36168 states and 149566 transitions. [2021-08-06 15:17:05,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:05,096 INFO L276 IsEmpty]: Start isEmpty. Operand 36168 states and 149566 transitions. [2021-08-06 15:17:05,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:17:05,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:05,379 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:05,399 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 15:17:05,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:05,593 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:05,593 INFO L82 PathProgramCache]: Analyzing trace with hash 804294421, now seen corresponding path program 24 times [2021-08-06 15:17:05,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:05,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507660063] [2021-08-06 15:17:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:05,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:06,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:06,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507660063] [2021-08-06 15:17:06,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507660063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:06,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88839384] [2021-08-06 15:17:06,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:17:06,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:06,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:06,055 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 15:17:06,055 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 15:17:06,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:17:06,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:06,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 15:17:06,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:07,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:17:07,323 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 34 treesize of output 52 [2021-08-06 15:17:07,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 15:17:07,767 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 15:17:07,767 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 18 treesize of output 17 [2021-08-06 15:17:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:07,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88839384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:07,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:07,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-08-06 15:17:07,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357534396] [2021-08-06 15:17:07,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:17:07,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:07,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:17:07,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:17:07,846 INFO L87 Difference]: Start difference. First operand 36168 states and 149566 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:10,214 INFO L93 Difference]: Finished difference Result 62363 states and 254195 transitions. [2021-08-06 15:17:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:17:10,215 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:17:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:10,469 INFO L225 Difference]: With dead ends: 62363 [2021-08-06 15:17:10,469 INFO L226 Difference]: Without dead ends: 62235 [2021-08-06 15:17:10,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1442.6ms TimeCoverageRelationStatistics Valid=434, Invalid=2428, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:17:10,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62235 states. [2021-08-06 15:17:11,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62235 to 36362. [2021-08-06 15:17:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36362 states, 36361 states have (on average 4.133439674376392) internal successors, (150296), 36361 states have internal predecessors, (150296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:11,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36362 states to 36362 states and 150296 transitions. [2021-08-06 15:17:11,707 INFO L78 Accepts]: Start accepts. Automaton has 36362 states and 150296 transitions. Word has length 39 [2021-08-06 15:17:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:11,707 INFO L470 AbstractCegarLoop]: Abstraction has 36362 states and 150296 transitions. [2021-08-06 15:17:11,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 36362 states and 150296 transitions. [2021-08-06 15:17:11,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:17:11,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:11,786 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:11,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-06 15:17:11,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-06 15:17:11,987 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:11,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1678817259, now seen corresponding path program 25 times [2021-08-06 15:17:11,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:11,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010496453] [2021-08-06 15:17:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:11,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:12,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:12,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010496453] [2021-08-06 15:17:12,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010496453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:12,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043183484] [2021-08-06 15:17:12,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:17:12,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:12,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:12,571 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 15:17:12,572 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 15:17:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:13,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:17:13,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:13,679 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:17:13,680 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 28 treesize of output 16 [2021-08-06 15:17:13,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-06 15:17:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:13,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043183484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:13,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:13,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:17:13,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731849606] [2021-08-06 15:17:13,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:17:13,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:13,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:17:13,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:17:13,960 INFO L87 Difference]: Start difference. First operand 36362 states and 150296 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:15,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:15,254 INFO L93 Difference]: Finished difference Result 68551 states and 281963 transitions. [2021-08-06 15:17:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:17:15,254 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:17:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:15,662 INFO L225 Difference]: With dead ends: 68551 [2021-08-06 15:17:15,662 INFO L226 Difference]: Without dead ends: 68496 [2021-08-06 15:17:15,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 821.1ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:17:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68496 states. [2021-08-06 15:17:16,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68496 to 36296. [2021-08-06 15:17:16,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36296 states, 36295 states have (on average 4.135087477613997) internal successors, (150083), 36295 states have internal predecessors, (150083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:16,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36296 states to 36296 states and 150083 transitions. [2021-08-06 15:17:16,943 INFO L78 Accepts]: Start accepts. Automaton has 36296 states and 150083 transitions. Word has length 39 [2021-08-06 15:17:16,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:16,943 INFO L470 AbstractCegarLoop]: Abstraction has 36296 states and 150083 transitions. [2021-08-06 15:17:16,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:16,943 INFO L276 IsEmpty]: Start isEmpty. Operand 36296 states and 150083 transitions. [2021-08-06 15:17:17,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:17:17,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:17,043 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:17,060 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 15:17:17,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-06 15:17:17,244 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:17,244 INFO L82 PathProgramCache]: Analyzing trace with hash 847258595, now seen corresponding path program 26 times [2021-08-06 15:17:17,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:17,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171926395] [2021-08-06 15:17:17,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:17,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:17,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:17,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171926395] [2021-08-06 15:17:17,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171926395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:17,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126209554] [2021-08-06 15:17:17,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:17:17,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:17,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:17,674 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 15:17:17,675 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 15:17:18,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:17:18,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:18,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:17:18,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:18,893 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:17:18,894 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 28 treesize of output 16 [2021-08-06 15:17:19,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 15:17:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:19,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126209554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:19,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:19,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:17:19,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993613354] [2021-08-06 15:17:19,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:17:19,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:17:19,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:17:19,273 INFO L87 Difference]: Start difference. First operand 36296 states and 150083 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:20,971 INFO L93 Difference]: Finished difference Result 78071 states and 316818 transitions. [2021-08-06 15:17:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:17:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:17:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:21,442 INFO L225 Difference]: With dead ends: 78071 [2021-08-06 15:17:21,442 INFO L226 Difference]: Without dead ends: 77887 [2021-08-06 15:17:21,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 996.9ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:17:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77887 states. [2021-08-06 15:17:22,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77887 to 36268. [2021-08-06 15:17:22,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36268 states, 36267 states have (on average 4.135688091102104) internal successors, (149989), 36267 states have internal predecessors, (149989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36268 states to 36268 states and 149989 transitions. [2021-08-06 15:17:22,888 INFO L78 Accepts]: Start accepts. Automaton has 36268 states and 149989 transitions. Word has length 39 [2021-08-06 15:17:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:22,889 INFO L470 AbstractCegarLoop]: Abstraction has 36268 states and 149989 transitions. [2021-08-06 15:17:22,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 36268 states and 149989 transitions. [2021-08-06 15:17:22,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:17:22,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:22,979 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:22,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-06 15:17:23,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-06 15:17:23,179 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:23,180 INFO L82 PathProgramCache]: Analyzing trace with hash -275859033, now seen corresponding path program 27 times [2021-08-06 15:17:23,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:23,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473526725] [2021-08-06 15:17:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:23,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:23,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:23,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473526725] [2021-08-06 15:17:23,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473526725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:23,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635839715] [2021-08-06 15:17:23,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:17:23,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:23,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:23,662 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 15:17:23,663 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 15:17:24,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:17:24,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:24,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 15:17:24,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:25,075 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-08-06 15:17:25,076 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 38 treesize of output 44 [2021-08-06 15:17:25,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 15:17:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:25,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635839715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:25,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:25,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-08-06 15:17:25,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538463390] [2021-08-06 15:17:25,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:17:25,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:25,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:17:25,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:17:25,539 INFO L87 Difference]: Start difference. First operand 36268 states and 149989 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:28,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:28,057 INFO L93 Difference]: Finished difference Result 76669 states and 310629 transitions. [2021-08-06 15:17:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:17:28,057 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:17:28,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:28,338 INFO L225 Difference]: With dead ends: 76669 [2021-08-06 15:17:28,338 INFO L226 Difference]: Without dead ends: 76397 [2021-08-06 15:17:28,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1446.7ms TimeCoverageRelationStatistics Valid=485, Invalid=2707, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:17:28,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76397 states. [2021-08-06 15:17:29,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76397 to 35787. [2021-08-06 15:17:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35787 states, 35786 states have (on average 4.1410048622366284) internal successors, (148190), 35786 states have internal predecessors, (148190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35787 states to 35787 states and 148190 transitions. [2021-08-06 15:17:29,700 INFO L78 Accepts]: Start accepts. Automaton has 35787 states and 148190 transitions. Word has length 39 [2021-08-06 15:17:29,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:29,700 INFO L470 AbstractCegarLoop]: Abstraction has 35787 states and 148190 transitions. [2021-08-06 15:17:29,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:29,700 INFO L276 IsEmpty]: Start isEmpty. Operand 35787 states and 148190 transitions. [2021-08-06 15:17:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:17:29,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:29,783 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:29,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-06 15:17:29,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:29,984 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:29,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:29,984 INFO L82 PathProgramCache]: Analyzing trace with hash 630820215, now seen corresponding path program 28 times [2021-08-06 15:17:29,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:29,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808147232] [2021-08-06 15:17:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:29,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:30,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:30,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808147232] [2021-08-06 15:17:30,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808147232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:30,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537539549] [2021-08-06 15:17:30,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:17:30,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:30,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:30,595 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 15:17:30,595 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 15:17:31,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:17:31,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:31,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:17:31,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:31,971 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:17:31,971 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 33 treesize of output 21 [2021-08-06 15:17:32,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 15:17:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:32,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537539549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:32,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:32,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:17:32,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904986181] [2021-08-06 15:17:32,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:17:32,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:32,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:17:32,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:17:32,199 INFO L87 Difference]: Start difference. First operand 35787 states and 148190 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:33,670 INFO L93 Difference]: Finished difference Result 62909 states and 257374 transitions. [2021-08-06 15:17:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:17:33,670 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:17:33,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:33,909 INFO L225 Difference]: With dead ends: 62909 [2021-08-06 15:17:33,909 INFO L226 Difference]: Without dead ends: 62717 [2021-08-06 15:17:33,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1034.8ms TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:17:33,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62717 states. [2021-08-06 15:17:34,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62717 to 35811. [2021-08-06 15:17:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35811 states, 35810 states have (on average 4.140575258307735) internal successors, (148274), 35810 states have internal predecessors, (148274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:35,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35811 states to 35811 states and 148274 transitions. [2021-08-06 15:17:35,067 INFO L78 Accepts]: Start accepts. Automaton has 35811 states and 148274 transitions. Word has length 39 [2021-08-06 15:17:35,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:35,067 INFO L470 AbstractCegarLoop]: Abstraction has 35811 states and 148274 transitions. [2021-08-06 15:17:35,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:35,067 INFO L276 IsEmpty]: Start isEmpty. Operand 35811 states and 148274 transitions. [2021-08-06 15:17:35,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:17:35,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:35,141 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:35,159 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 15:17:35,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 15:17:35,342 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:35,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:35,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1514365043, now seen corresponding path program 29 times [2021-08-06 15:17:35,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:35,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679309909] [2021-08-06 15:17:35,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:35,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:35,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:35,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679309909] [2021-08-06 15:17:35,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679309909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:35,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198204730] [2021-08-06 15:17:35,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:17:35,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:35,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:35,967 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 15:17:35,968 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 15:17:36,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:17:36,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:36,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:17:36,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:37,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:17:37,498 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 39 treesize of output 57 [2021-08-06 15:17:37,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-06 15:17:37,720 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-08-06 15:17:37,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 47 [2021-08-06 15:17:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:37,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198204730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:37,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:37,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-08-06 15:17:37,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363523693] [2021-08-06 15:17:37,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:17:37,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:17:37,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:17:37,849 INFO L87 Difference]: Start difference. First operand 35811 states and 148274 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:41,188 INFO L93 Difference]: Finished difference Result 65491 states and 266916 transitions. [2021-08-06 15:17:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 15:17:41,188 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:17:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:41,437 INFO L225 Difference]: With dead ends: 65491 [2021-08-06 15:17:41,437 INFO L226 Difference]: Without dead ends: 65150 [2021-08-06 15:17:41,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2267.6ms TimeCoverageRelationStatistics Valid=805, Invalid=4451, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 15:17:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65150 states. [2021-08-06 15:17:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65150 to 36256. [2021-08-06 15:17:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36256 states, 36255 states have (on average 4.134933112674114) internal successors, (149912), 36255 states have internal predecessors, (149912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:42,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36256 states to 36256 states and 149912 transitions. [2021-08-06 15:17:42,609 INFO L78 Accepts]: Start accepts. Automaton has 36256 states and 149912 transitions. Word has length 39 [2021-08-06 15:17:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:42,609 INFO L470 AbstractCegarLoop]: Abstraction has 36256 states and 149912 transitions. [2021-08-06 15:17:42,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:42,609 INFO L276 IsEmpty]: Start isEmpty. Operand 36256 states and 149912 transitions. [2021-08-06 15:17:42,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:17:42,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:42,689 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:42,708 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 15:17:42,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 15:17:42,890 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:42,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:42,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1604148193, now seen corresponding path program 30 times [2021-08-06 15:17:42,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:42,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135535893] [2021-08-06 15:17:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:42,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:43,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:43,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135535893] [2021-08-06 15:17:43,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135535893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:43,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51061223] [2021-08-06 15:17:43,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:17:43,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:43,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:43,569 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 15:17:43,570 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 15:17:44,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:17:44,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:44,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 15:17:44,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:45,237 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:17:45,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 32 [2021-08-06 15:17:45,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 15:17:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:45,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51061223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:45,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:45,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:17:45,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865197451] [2021-08-06 15:17:45,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:17:45,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:45,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:17:45,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:17:45,387 INFO L87 Difference]: Start difference. First operand 36256 states and 149912 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:47,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:47,195 INFO L93 Difference]: Finished difference Result 78346 states and 317655 transitions. [2021-08-06 15:17:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:17:47,195 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:17:47,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:47,631 INFO L225 Difference]: With dead ends: 78346 [2021-08-06 15:17:47,632 INFO L226 Difference]: Without dead ends: 78178 [2021-08-06 15:17:47,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1150.5ms TimeCoverageRelationStatistics Valid=415, Invalid=1937, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:17:47,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78178 states. [2021-08-06 15:17:48,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78178 to 35997. [2021-08-06 15:17:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35997 states, 35996 states have (on average 4.138626514057117) internal successors, (148974), 35996 states have internal predecessors, (148974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35997 states to 35997 states and 148974 transitions. [2021-08-06 15:17:48,959 INFO L78 Accepts]: Start accepts. Automaton has 35997 states and 148974 transitions. Word has length 39 [2021-08-06 15:17:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:48,959 INFO L470 AbstractCegarLoop]: Abstraction has 35997 states and 148974 transitions. [2021-08-06 15:17:48,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 35997 states and 148974 transitions. [2021-08-06 15:17:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:17:49,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:49,035 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:49,056 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 15:17:49,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 15:17:49,236 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:49,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:49,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1838065757, now seen corresponding path program 31 times [2021-08-06 15:17:49,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:49,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566933291] [2021-08-06 15:17:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:49,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:49,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:49,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566933291] [2021-08-06 15:17:49,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566933291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:49,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584881091] [2021-08-06 15:17:49,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:17:49,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:49,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:49,679 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 15:17:49,679 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 15:17:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:50,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:17:50,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:51,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-06 15:17:51,471 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:17:51,472 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 39 treesize of output 27 [2021-08-06 15:17:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:51,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584881091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:51,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:51,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:17:51,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282451621] [2021-08-06 15:17:51,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:17:51,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:51,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:17:51,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:17:51,567 INFO L87 Difference]: Start difference. First operand 35997 states and 148974 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:53,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:53,491 INFO L93 Difference]: Finished difference Result 79840 states and 324547 transitions. [2021-08-06 15:17:53,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:17:53,491 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:17:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:53,798 INFO L225 Difference]: With dead ends: 79840 [2021-08-06 15:17:53,798 INFO L226 Difference]: Without dead ends: 79688 [2021-08-06 15:17:53,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1117.3ms TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:17:53,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79688 states. [2021-08-06 15:17:54,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79688 to 36067. [2021-08-06 15:17:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36067 states, 36066 states have (on average 4.13946653357733) internal successors, (149294), 36066 states have internal predecessors, (149294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36067 states to 36067 states and 149294 transitions. [2021-08-06 15:17:55,161 INFO L78 Accepts]: Start accepts. Automaton has 36067 states and 149294 transitions. Word has length 39 [2021-08-06 15:17:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:55,163 INFO L470 AbstractCegarLoop]: Abstraction has 36067 states and 149294 transitions. [2021-08-06 15:17:55,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 36067 states and 149294 transitions. [2021-08-06 15:17:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:17:55,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:55,237 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:55,256 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 15:17:55,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 15:17:55,442 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:55,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:55,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1634145011, now seen corresponding path program 32 times [2021-08-06 15:17:55,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:55,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279346910] [2021-08-06 15:17:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:55,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:56,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:56,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279346910] [2021-08-06 15:17:56,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279346910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:56,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447237481] [2021-08-06 15:17:56,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:17:56,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:56,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:56,028 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 15:17:56,029 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 15:17:57,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:17:57,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:57,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:17:57,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:57,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-06 15:17:57,708 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:17:57,708 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 39 treesize of output 27 [2021-08-06 15:17:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:57,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447237481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:57,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:57,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:17:57,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938778189] [2021-08-06 15:17:57,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:17:57,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:17:57,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:17:57,819 INFO L87 Difference]: Start difference. First operand 36067 states and 149294 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:59,258 INFO L93 Difference]: Finished difference Result 66515 states and 271677 transitions. [2021-08-06 15:17:59,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:17:59,258 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:17:59,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:59,511 INFO L225 Difference]: With dead ends: 66515 [2021-08-06 15:17:59,511 INFO L226 Difference]: Without dead ends: 66425 [2021-08-06 15:17:59,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 950.7ms TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:17:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66425 states. [2021-08-06 15:18:00,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66425 to 36065. [2021-08-06 15:18:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36065 states, 36064 states have (on average 4.142413487133984) internal successors, (149392), 36064 states have internal predecessors, (149392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36065 states to 36065 states and 149392 transitions. [2021-08-06 15:18:00,826 INFO L78 Accepts]: Start accepts. Automaton has 36065 states and 149392 transitions. Word has length 39 [2021-08-06 15:18:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:00,826 INFO L470 AbstractCegarLoop]: Abstraction has 36065 states and 149392 transitions. [2021-08-06 15:18:00,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:00,826 INFO L276 IsEmpty]: Start isEmpty. Operand 36065 states and 149392 transitions. [2021-08-06 15:18:00,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:18:00,907 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:00,907 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:00,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 15:18:01,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-06 15:18:01,108 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:01,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:01,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1560500787, now seen corresponding path program 33 times [2021-08-06 15:18:01,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:01,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951187109] [2021-08-06 15:18:01,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:01,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:18:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:01,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:18:01,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951187109] [2021-08-06 15:18:01,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951187109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:01,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228561241] [2021-08-06 15:18:01,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:18:01,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:01,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:18:01,513 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 15:18:01,513 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 15:18:02,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:18:02,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:18:02,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 15:18:02,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:03,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:18:03,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:18:03,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-08-06 15:18:03,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:18:03,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-08-06 15:18:03,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:18:03,681 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 25 treesize of output 29 [2021-08-06 15:18:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:03,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228561241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:03,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:03,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-08-06 15:18:03,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541453678] [2021-08-06 15:18:03,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:18:03,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:03,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:18:03,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:18:03,966 INFO L87 Difference]: Start difference. First operand 36065 states and 149392 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:08,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:08,514 INFO L93 Difference]: Finished difference Result 62921 states and 254607 transitions. [2021-08-06 15:18:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-06 15:18:08,514 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:18:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:08,856 INFO L225 Difference]: With dead ends: 62921 [2021-08-06 15:18:08,857 INFO L226 Difference]: Without dead ends: 62773 [2021-08-06 15:18:08,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2424 ImplicationChecksByTransitivity, 3285.4ms TimeCoverageRelationStatistics Valid=1005, Invalid=6651, Unknown=0, NotChecked=0, Total=7656 [2021-08-06 15:18:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62773 states. [2021-08-06 15:18:09,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62773 to 36501. [2021-08-06 15:18:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36501 states, 36500 states have (on average 4.138684931506849) internal successors, (151062), 36500 states have internal predecessors, (151062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:09,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36501 states to 36501 states and 151062 transitions. [2021-08-06 15:18:09,907 INFO L78 Accepts]: Start accepts. Automaton has 36501 states and 151062 transitions. Word has length 39 [2021-08-06 15:18:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:09,907 INFO L470 AbstractCegarLoop]: Abstraction has 36501 states and 151062 transitions. [2021-08-06 15:18:09,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:09,907 INFO L276 IsEmpty]: Start isEmpty. Operand 36501 states and 151062 transitions. [2021-08-06 15:18:10,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:18:10,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:10,338 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:10,358 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 15:18:10,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:10,553 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:10,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:10,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1052629599, now seen corresponding path program 34 times [2021-08-06 15:18:10,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:10,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098834809] [2021-08-06 15:18:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:10,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:18:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:10,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:18:10,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098834809] [2021-08-06 15:18:10,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098834809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:10,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795666875] [2021-08-06 15:18:10,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:18:10,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:10,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:18:10,956 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 15:18:10,957 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 15:18:12,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:18:12,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:18:12,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:18:12,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:12,738 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:18:12,738 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 28 treesize of output 16 [2021-08-06 15:18:12,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 15:18:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:12,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795666875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:12,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:12,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:18:12,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794048807] [2021-08-06 15:18:12,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:18:12,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:12,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:18:12,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:18:12,967 INFO L87 Difference]: Start difference. First operand 36501 states and 151062 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:14,919 INFO L93 Difference]: Finished difference Result 78456 states and 318871 transitions. [2021-08-06 15:18:14,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:18:14,920 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:18:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:15,280 INFO L225 Difference]: With dead ends: 78456 [2021-08-06 15:18:15,280 INFO L226 Difference]: Without dead ends: 78240 [2021-08-06 15:18:15,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1061.8ms TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 15:18:15,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78240 states. [2021-08-06 15:18:16,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78240 to 36339. [2021-08-06 15:18:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36339 states, 36338 states have (on average 4.140899334030491) internal successors, (150472), 36338 states have internal predecessors, (150472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36339 states to 36339 states and 150472 transitions. [2021-08-06 15:18:16,759 INFO L78 Accepts]: Start accepts. Automaton has 36339 states and 150472 transitions. Word has length 39 [2021-08-06 15:18:16,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:16,759 INFO L470 AbstractCegarLoop]: Abstraction has 36339 states and 150472 transitions. [2021-08-06 15:18:16,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:16,759 INFO L276 IsEmpty]: Start isEmpty. Operand 36339 states and 150472 transitions. [2021-08-06 15:18:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:18:16,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:16,836 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:16,855 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 15:18:17,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-06 15:18:17,037 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:17,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:17,037 INFO L82 PathProgramCache]: Analyzing trace with hash 251354829, now seen corresponding path program 35 times [2021-08-06 15:18:17,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:17,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559581630] [2021-08-06 15:18:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:17,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:18:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:17,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:18:17,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559581630] [2021-08-06 15:18:17,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559581630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:17,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357656674] [2021-08-06 15:18:17,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:18:17,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:17,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:18:17,673 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 15:18:17,700 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 15:18:18,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:18:18,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:18:18,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 15:18:18,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:19,324 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-08-06 15:18:19,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 54 [2021-08-06 15:18:19,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-08-06 15:18:19,559 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-08-06 15:18:19,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 47 [2021-08-06 15:18:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:19,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357656674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:19,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:19,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-08-06 15:18:19,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179883494] [2021-08-06 15:18:19,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:18:19,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:19,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:18:19,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:18:19,684 INFO L87 Difference]: Start difference. First operand 36339 states and 150472 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:22,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:22,467 INFO L93 Difference]: Finished difference Result 66197 states and 270596 transitions. [2021-08-06 15:18:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 15:18:22,467 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:18:22,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:22,761 INFO L225 Difference]: With dead ends: 66197 [2021-08-06 15:18:22,761 INFO L226 Difference]: Without dead ends: 66087 [2021-08-06 15:18:22,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1692.9ms TimeCoverageRelationStatistics Valid=632, Invalid=4060, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 15:18:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66087 states. [2021-08-06 15:18:23,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66087 to 36697. [2021-08-06 15:18:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36697 states, 36696 states have (on average 4.138761717898409) internal successors, (151876), 36696 states have internal predecessors, (151876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:24,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36697 states to 36697 states and 151876 transitions. [2021-08-06 15:18:24,059 INFO L78 Accepts]: Start accepts. Automaton has 36697 states and 151876 transitions. Word has length 39 [2021-08-06 15:18:24,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:24,059 INFO L470 AbstractCegarLoop]: Abstraction has 36697 states and 151876 transitions. [2021-08-06 15:18:24,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:24,059 INFO L276 IsEmpty]: Start isEmpty. Operand 36697 states and 151876 transitions. [2021-08-06 15:18:24,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:18:24,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:24,149 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:24,168 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 15:18:24,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:24,349 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:24,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:24,349 INFO L82 PathProgramCache]: Analyzing trace with hash -475176097, now seen corresponding path program 36 times [2021-08-06 15:18:24,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:24,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560041456] [2021-08-06 15:18:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:24,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:18:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:24,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:18:24,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560041456] [2021-08-06 15:18:24,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560041456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:24,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131631643] [2021-08-06 15:18:24,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:18:24,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:24,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:18:24,764 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 15:18:24,796 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 15:18:26,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:18:26,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:18:26,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 15:18:26,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:26,743 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:18:26,744 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 28 treesize of output 16 [2021-08-06 15:18:26,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-06 15:18:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:26,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131631643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:26,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:26,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:18:26,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339679471] [2021-08-06 15:18:26,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:18:26,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:18:26,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:18:26,914 INFO L87 Difference]: Start difference. First operand 36697 states and 151876 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:28,435 INFO L93 Difference]: Finished difference Result 83068 states and 339285 transitions. [2021-08-06 15:18:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:18:28,436 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:18:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:29,100 INFO L225 Difference]: With dead ends: 83068 [2021-08-06 15:18:29,100 INFO L226 Difference]: Without dead ends: 83013 [2021-08-06 15:18:29,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 844.6ms TimeCoverageRelationStatistics Valid=331, Invalid=1739, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:18:29,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83013 states. [2021-08-06 15:18:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83013 to 36189. [2021-08-06 15:18:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36189 states, 36188 states have (on average 4.142257101801702) internal successors, (149900), 36188 states have internal predecessors, (149900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:30,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36189 states to 36189 states and 149900 transitions. [2021-08-06 15:18:30,644 INFO L78 Accepts]: Start accepts. Automaton has 36189 states and 149900 transitions. Word has length 39 [2021-08-06 15:18:30,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:30,644 INFO L470 AbstractCegarLoop]: Abstraction has 36189 states and 149900 transitions. [2021-08-06 15:18:30,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:30,644 INFO L276 IsEmpty]: Start isEmpty. Operand 36189 states and 149900 transitions. [2021-08-06 15:18:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:18:30,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:30,734 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:30,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-06 15:18:30,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-06 15:18:30,935 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:30,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:30,935 INFO L82 PathProgramCache]: Analyzing trace with hash 892867017, now seen corresponding path program 37 times [2021-08-06 15:18:30,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:30,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560070168] [2021-08-06 15:18:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:30,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:18:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:31,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:18:31,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560070168] [2021-08-06 15:18:31,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560070168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:31,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87743321] [2021-08-06 15:18:31,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:18:31,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:31,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:18:31,357 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 15:18:31,357 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 15:18:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:32,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:18:32,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:33,371 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:18:33,371 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 33 treesize of output 21 [2021-08-06 15:18:33,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 15:18:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:33,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87743321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:33,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:33,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:18:33,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377911219] [2021-08-06 15:18:33,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:18:33,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:33,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:18:33,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:18:33,553 INFO L87 Difference]: Start difference. First operand 36189 states and 149900 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:35,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:35,017 INFO L93 Difference]: Finished difference Result 64715 states and 264452 transitions. [2021-08-06 15:18:35,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:18:35,022 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:18:35,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:35,255 INFO L225 Difference]: With dead ends: 64715 [2021-08-06 15:18:35,256 INFO L226 Difference]: Without dead ends: 64467 [2021-08-06 15:18:35,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 851.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:18:35,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64467 states. [2021-08-06 15:18:36,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64467 to 36375. [2021-08-06 15:18:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36375 states, 36374 states have (on average 4.1403200087974925) internal successors, (150600), 36374 states have internal predecessors, (150600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36375 states to 36375 states and 150600 transitions. [2021-08-06 15:18:36,521 INFO L78 Accepts]: Start accepts. Automaton has 36375 states and 150600 transitions. Word has length 39 [2021-08-06 15:18:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:36,521 INFO L470 AbstractCegarLoop]: Abstraction has 36375 states and 150600 transitions. [2021-08-06 15:18:36,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 36375 states and 150600 transitions. [2021-08-06 15:18:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:18:36,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:36,600 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:36,621 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 15:18:36,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 15:18:36,802 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:36,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:36,802 INFO L82 PathProgramCache]: Analyzing trace with hash 255706527, now seen corresponding path program 38 times [2021-08-06 15:18:36,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:36,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32072561] [2021-08-06 15:18:36,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:36,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:18:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:37,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:18:37,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32072561] [2021-08-06 15:18:37,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32072561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:37,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962586967] [2021-08-06 15:18:37,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:18:37,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:37,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:18:37,243 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 15:18:37,244 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 15:18:38,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:18:38,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:18:38,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:18:38,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:39,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-06 15:18:39,315 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:18:39,315 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 39 treesize of output 27 [2021-08-06 15:18:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:39,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962586967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:39,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:39,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:18:39,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996338022] [2021-08-06 15:18:39,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:18:39,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:39,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:18:39,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:18:39,419 INFO L87 Difference]: Start difference. First operand 36375 states and 150600 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:41,177 INFO L93 Difference]: Finished difference Result 80659 states and 327927 transitions. [2021-08-06 15:18:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:18:41,178 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:18:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:41,528 INFO L225 Difference]: With dead ends: 80659 [2021-08-06 15:18:41,528 INFO L226 Difference]: Without dead ends: 80491 [2021-08-06 15:18:41,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 934.2ms TimeCoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:18:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80491 states. [2021-08-06 15:18:42,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80491 to 36445. [2021-08-06 15:18:42,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36445 states, 36444 states have (on average 4.141148062781253) internal successors, (150920), 36444 states have internal predecessors, (150920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36445 states to 36445 states and 150920 transitions. [2021-08-06 15:18:42,956 INFO L78 Accepts]: Start accepts. Automaton has 36445 states and 150920 transitions. Word has length 39 [2021-08-06 15:18:42,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:42,956 INFO L470 AbstractCegarLoop]: Abstraction has 36445 states and 150920 transitions. [2021-08-06 15:18:42,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:42,956 INFO L276 IsEmpty]: Start isEmpty. Operand 36445 states and 150920 transitions. [2021-08-06 15:18:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:18:43,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:43,035 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:43,057 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 15:18:43,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 15:18:43,235 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:43,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:43,236 INFO L82 PathProgramCache]: Analyzing trace with hash 459627273, now seen corresponding path program 39 times [2021-08-06 15:18:43,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:43,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288905046] [2021-08-06 15:18:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:43,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:18:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:43,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:18:43,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288905046] [2021-08-06 15:18:43,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288905046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:43,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967085959] [2021-08-06 15:18:43,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:18:43,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:43,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:18:43,819 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 15:18:43,820 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 15:18:45,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:18:45,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:18:45,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 15:18:45,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:46,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:18:46,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-08-06 15:18:46,094 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:18:46,094 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 60 treesize of output 46 [2021-08-06 15:18:46,149 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:18:46,149 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 13 treesize of output 5 [2021-08-06 15:18:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:46,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967085959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:46,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:46,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-06 15:18:46,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89278836] [2021-08-06 15:18:46,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:18:46,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:46,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:18:46,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:18:46,373 INFO L87 Difference]: Start difference. First operand 36445 states and 150920 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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 15:18:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:48,384 INFO L93 Difference]: Finished difference Result 59731 states and 242803 transitions. [2021-08-06 15:18:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:18:48,384 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:18:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:48,739 INFO L225 Difference]: With dead ends: 59731 [2021-08-06 15:18:48,739 INFO L226 Difference]: Without dead ends: 59583 [2021-08-06 15:18:48,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1277.3ms TimeCoverageRelationStatistics Valid=476, Invalid=2176, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 15:18:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59583 states. [2021-08-06 15:18:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59583 to 36467. [2021-08-06 15:18:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36467 states, 36466 states have (on average 4.140953216695004) internal successors, (151004), 36466 states have internal predecessors, (151004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36467 states to 36467 states and 151004 transitions. [2021-08-06 15:18:49,746 INFO L78 Accepts]: Start accepts. Automaton has 36467 states and 151004 transitions. Word has length 39 [2021-08-06 15:18:49,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:49,747 INFO L470 AbstractCegarLoop]: Abstraction has 36467 states and 151004 transitions. [2021-08-06 15:18:49,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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 15:18:49,747 INFO L276 IsEmpty]: Start isEmpty. Operand 36467 states and 151004 transitions. [2021-08-06 15:18:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:18:49,838 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:49,838 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]