/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/parallel/min-max-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:29:45,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:29:45,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:29:45,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:29:45,190 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 [2021-08-21 12:29:45,221 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:29:45,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:29:45,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:29:45,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:29:45,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:29:45,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:29:45,224 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:29:45,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:29:45,225 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:29:45,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:29:45,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:29:45,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:29:45,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:29:45,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:29:45,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:29:45,226 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:29:45,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:29:45,226 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:29:45,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:29:45,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:29:45,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:29:45,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:29:45,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:29:45,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:29:45,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:29:45,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:29:45,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:29:45,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:29:45,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:29:45,228 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:29:45,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:29:45,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:29:45,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:29:45,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:29:45,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:29:45,481 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:29:45,482 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:29:45,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl [2021-08-21 12:29:45,483 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl' [2021-08-21 12:29:45,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:29:45,529 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:29:45,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:29:45,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:29:45,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:29:45,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:29:45" (1/1) ... [2021-08-21 12:29:45,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:29:45" (1/1) ... [2021-08-21 12:29:45,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:29:45,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:29:45,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:29:45,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:29:45,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:29:45" (1/1) ... [2021-08-21 12:29:45,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:29:45" (1/1) ... [2021-08-21 12:29:45,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:29:45" (1/1) ... [2021-08-21 12:29:45,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:29:45" (1/1) ... [2021-08-21 12:29:45,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:29:45" (1/1) ... [2021-08-21 12:29:45,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:29:45" (1/1) ... [2021-08-21 12:29:45,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:29:45" (1/1) ... [2021-08-21 12:29:45,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:29:45,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:29:45,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:29:45,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:29:45,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:29:45" (1/1) ... [2021-08-21 12:29:45,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:29:45,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:45,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 12:29:45,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 12:29:45,639 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:29:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:29:45,640 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:29:45,640 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:29:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:29:45,640 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:29:45,640 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:29:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:29:45,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:29:45,640 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:29:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:29:45,641 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:29:45,641 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 12:29:45,642 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 12:29:45,642 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 12:29:45,642 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-08-21 12:29:45,642 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-08-21 12:29:45,642 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-08-21 12:29:45,643 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:29:45,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:29:45,798 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:29:45,799 INFO L202 PluginConnector]: Adding new model min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:29:45 BoogieIcfgContainer [2021-08-21 12:29:45,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:29:45,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:29:45,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:29:45,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:29:45,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:29:45" (1/2) ... [2021-08-21 12:29:45,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6421dcd1 and model type min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:29:45, skipping insertion in model container [2021-08-21 12:29:45,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:29:45" (2/2) ... [2021-08-21 12:29:45,804 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-2.wvr.bpl [2021-08-21 12:29:45,807 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:29:45,807 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:29:45,807 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:29:45,807 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:29:45,874 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-08-21 12:29:45,900 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:29:45,904 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 12:29:45,905 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-21 12:29:45,911 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 46 transitions, 132 flow [2021-08-21 12:29:46,086 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5824 states, 5823 states have (on average 4.66958612399107) internal successors, (27191), 5823 states have internal predecessors, (27191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:46,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 5824 states, 5823 states have (on average 4.66958612399107) internal successors, (27191), 5823 states have internal predecessors, (27191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:29:46,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:46,162 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] [2021-08-21 12:29:46,163 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:29:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:46,167 INFO L82 PathProgramCache]: Analyzing trace with hash -2136423211, now seen corresponding path program 1 times [2021-08-21 12:29:46,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:46,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762778043] [2021-08-21 12:29:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:46,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:46,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:46,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762778043] [2021-08-21 12:29:46,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762778043] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:46,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:46,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:29:46,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364413342] [2021-08-21 12:29:46,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:29:46,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:46,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:29:46,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:29:46,394 INFO L87 Difference]: Start difference. First operand has 5824 states, 5823 states have (on average 4.66958612399107) internal successors, (27191), 5823 states have internal predecessors, (27191), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:46,868 INFO L93 Difference]: Finished difference Result 23171 states and 106643 transitions. [2021-08-21 12:29:46,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:29:46,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:29:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:47,012 INFO L225 Difference]: With dead ends: 23171 [2021-08-21 12:29:47,012 INFO L226 Difference]: Without dead ends: 15763 [2021-08-21 12:29:47,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:29:47,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15763 states. [2021-08-21 12:29:47,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15763 to 7383. [2021-08-21 12:29:47,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7383 states, 7382 states have (on average 4.632078027634788) internal successors, (34194), 7382 states have internal predecessors, (34194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7383 states to 7383 states and 34194 transitions. [2021-08-21 12:29:47,504 INFO L78 Accepts]: Start accepts. Automaton has 7383 states and 34194 transitions. Word has length 27 [2021-08-21 12:29:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:47,504 INFO L470 AbstractCegarLoop]: Abstraction has 7383 states and 34194 transitions. [2021-08-21 12:29:47,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 7383 states and 34194 transitions. [2021-08-21 12:29:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:29:47,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:47,527 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] [2021-08-21 12:29:47,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:29:47,527 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:29:47,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:47,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1694783063, now seen corresponding path program 2 times [2021-08-21 12:29:47,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:47,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498586175] [2021-08-21 12:29:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:47,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:47,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:47,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498586175] [2021-08-21 12:29:47,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498586175] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:47,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:47,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:29:47,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543313276] [2021-08-21 12:29:47,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:29:47,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:47,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:29:47,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:29:47,559 INFO L87 Difference]: Start difference. First operand 7383 states and 34194 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) [2021-08-21 12:29:47,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:47,707 INFO L93 Difference]: Finished difference Result 9446 states and 43398 transitions. [2021-08-21 12:29:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:29:47,707 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 [2021-08-21 12:29:47,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:47,734 INFO L225 Difference]: With dead ends: 9446 [2021-08-21 12:29:47,734 INFO L226 Difference]: Without dead ends: 6583 [2021-08-21 12:29:47,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:29:47,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-08-21 12:29:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6583. [2021-08-21 12:29:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 6582 states have (on average 4.564570039501671) internal successors, (30044), 6582 states have internal predecessors, (30044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 30044 transitions. [2021-08-21 12:29:47,950 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 30044 transitions. Word has length 27 [2021-08-21 12:29:47,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:47,952 INFO L470 AbstractCegarLoop]: Abstraction has 6583 states and 30044 transitions. [2021-08-21 12:29:47,953 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) [2021-08-21 12:29:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 30044 transitions. [2021-08-21 12:29:47,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:29:47,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:47,973 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] [2021-08-21 12:29:47,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:29:47,974 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:29:47,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:47,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1387431189, now seen corresponding path program 3 times [2021-08-21 12:29:47,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:47,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882936114] [2021-08-21 12:29:47,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:47,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:48,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:48,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882936114] [2021-08-21 12:29:48,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882936114] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:48,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:48,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:29:48,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522607929] [2021-08-21 12:29:48,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:29:48,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:48,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:29:48,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:29:48,029 INFO L87 Difference]: Start difference. First operand 6583 states and 30044 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:48,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:48,359 INFO L93 Difference]: Finished difference Result 22801 states and 103818 transitions. [2021-08-21 12:29:48,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:29:48,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:29:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:48,465 INFO L225 Difference]: With dead ends: 22801 [2021-08-21 12:29:48,465 INFO L226 Difference]: Without dead ends: 16593 [2021-08-21 12:29:48,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:29:48,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16593 states. [2021-08-21 12:29:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16593 to 6861. [2021-08-21 12:29:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6861 states, 6860 states have (on average 4.574052478134111) internal successors, (31378), 6860 states have internal predecessors, (31378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 31378 transitions. [2021-08-21 12:29:48,836 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 31378 transitions. Word has length 27 [2021-08-21 12:29:48,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:48,836 INFO L470 AbstractCegarLoop]: Abstraction has 6861 states and 31378 transitions. [2021-08-21 12:29:48,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 31378 transitions. [2021-08-21 12:29:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:29:48,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:48,861 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] [2021-08-21 12:29:48,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:29:48,861 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:29:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1055757637, now seen corresponding path program 4 times [2021-08-21 12:29:48,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:48,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747113391] [2021-08-21 12:29:48,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:48,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:48,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:48,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747113391] [2021-08-21 12:29:48,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747113391] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:48,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:48,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:29:48,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79215993] [2021-08-21 12:29:48,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:29:48,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:48,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:29:48,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:29:48,987 INFO L87 Difference]: Start difference. First operand 6861 states and 31378 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) [2021-08-21 12:29:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:49,067 INFO L93 Difference]: Finished difference Result 8424 states and 38332 transitions. [2021-08-21 12:29:49,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:29:49,067 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 [2021-08-21 12:29:49,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:49,104 INFO L225 Difference]: With dead ends: 8424 [2021-08-21 12:29:49,104 INFO L226 Difference]: Without dead ends: 6361 [2021-08-21 12:29:49,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:29:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-08-21 12:29:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 6361. [2021-08-21 12:29:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6361 states, 6360 states have (on average 4.524842767295597) internal successors, (28778), 6360 states have internal predecessors, (28778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 28778 transitions. [2021-08-21 12:29:49,355 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 28778 transitions. Word has length 27 [2021-08-21 12:29:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:49,355 INFO L470 AbstractCegarLoop]: Abstraction has 6361 states and 28778 transitions. [2021-08-21 12:29:49,355 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) [2021-08-21 12:29:49,355 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 28778 transitions. [2021-08-21 12:29:49,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:29:49,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:49,378 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, 1] [2021-08-21 12:29:49,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:29:49,379 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:29:49,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:49,379 INFO L82 PathProgramCache]: Analyzing trace with hash 243141281, now seen corresponding path program 1 times [2021-08-21 12:29:49,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:49,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5840551] [2021-08-21 12:29:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:49,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:49,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:49,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5840551] [2021-08-21 12:29:49,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5840551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:49,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795499217] [2021-08-21 12:29:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:49,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:49,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:49,447 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:29:49,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:29:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:49,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:29:49,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:49,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795499217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:49,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:49,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 12:29:49,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565690594] [2021-08-21 12:29:49,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:29:49,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:49,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:29:49,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:29:49,691 INFO L87 Difference]: Start difference. First operand 6361 states and 28778 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) [2021-08-21 12:29:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:49,866 INFO L93 Difference]: Finished difference Result 13742 states and 61751 transitions. [2021-08-21 12:29:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:29:49,867 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 30 [2021-08-21 12:29:49,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:49,932 INFO L225 Difference]: With dead ends: 13742 [2021-08-21 12:29:49,932 INFO L226 Difference]: Without dead ends: 13742 [2021-08-21 12:29:49,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:29:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-08-21 12:29:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7994. [2021-08-21 12:29:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 4.5614913048917805) internal successors, (36460), 7993 states have internal predecessors, (36460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 36460 transitions. [2021-08-21 12:29:50,253 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 36460 transitions. Word has length 30 [2021-08-21 12:29:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:50,253 INFO L470 AbstractCegarLoop]: Abstraction has 7994 states and 36460 transitions. [2021-08-21 12:29:50,254 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) [2021-08-21 12:29:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 36460 transitions. [2021-08-21 12:29:50,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:29:50,273 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:50,273 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, 1] [2021-08-21 12:29:50,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:29:50,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:50,489 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:29:50,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:50,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1679087144, now seen corresponding path program 1 times [2021-08-21 12:29:50,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:50,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133621579] [2021-08-21 12:29:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:50,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:50,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:50,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133621579] [2021-08-21 12:29:50,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133621579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:50,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834667080] [2021-08-21 12:29:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:50,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:50,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:50,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:29:50,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:29:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:50,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:29:50,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:50,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834667080] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:50,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:29:50,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-08-21 12:29:50,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556554453] [2021-08-21 12:29:50,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:29:50,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:50,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:29:50,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:29:50,753 INFO L87 Difference]: Start difference. First operand 7994 states and 36460 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) [2021-08-21 12:29:50,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:50,875 INFO L93 Difference]: Finished difference Result 11412 states and 52000 transitions. [2021-08-21 12:29:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:29:50,876 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 30 [2021-08-21 12:29:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:50,914 INFO L225 Difference]: With dead ends: 11412 [2021-08-21 12:29:50,914 INFO L226 Difference]: Without dead ends: 11118 [2021-08-21 12:29:50,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:29:50,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2021-08-21 12:29:51,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 8742. [2021-08-21 12:29:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 8741 states have (on average 4.594554398810205) internal successors, (40161), 8741 states have internal predecessors, (40161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 40161 transitions. [2021-08-21 12:29:51,256 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 40161 transitions. Word has length 30 [2021-08-21 12:29:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:51,256 INFO L470 AbstractCegarLoop]: Abstraction has 8742 states and 40161 transitions. [2021-08-21 12:29:51,256 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) [2021-08-21 12:29:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 40161 transitions. [2021-08-21 12:29:51,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:29:51,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:51,277 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, 1] [2021-08-21 12:29:51,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:29:51,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-21 12:29:51,477 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:29:51,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:51,478 INFO L82 PathProgramCache]: Analyzing trace with hash -43418172, now seen corresponding path program 1 times [2021-08-21 12:29:51,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:51,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100714457] [2021-08-21 12:29:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:51,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:51,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:51,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100714457] [2021-08-21 12:29:51,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100714457] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:51,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:51,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:29:51,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499519442] [2021-08-21 12:29:51,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:29:51,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:51,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:29:51,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:29:51,507 INFO L87 Difference]: Start difference. First operand 8742 states and 40161 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) [2021-08-21 12:29:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:51,715 INFO L93 Difference]: Finished difference Result 15516 states and 70047 transitions. [2021-08-21 12:29:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:29:51,716 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 30 [2021-08-21 12:29:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:51,771 INFO L225 Difference]: With dead ends: 15516 [2021-08-21 12:29:51,771 INFO L226 Difference]: Without dead ends: 15386 [2021-08-21 12:29:51,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:29:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15386 states. [2021-08-21 12:29:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15386 to 12424. [2021-08-21 12:29:52,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 4.582065523625533) internal successors, (56923), 12423 states have internal predecessors, (56923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 56923 transitions. [2021-08-21 12:29:52,208 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 56923 transitions. Word has length 30 [2021-08-21 12:29:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:52,209 INFO L470 AbstractCegarLoop]: Abstraction has 12424 states and 56923 transitions. [2021-08-21 12:29:52,209 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) [2021-08-21 12:29:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 56923 transitions. [2021-08-21 12:29:52,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:29:52,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:52,240 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, 1] [2021-08-21 12:29:52,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 12:29:52,240 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:29:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:52,240 INFO L82 PathProgramCache]: Analyzing trace with hash 895564249, now seen corresponding path program 1 times [2021-08-21 12:29:52,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:52,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994395794] [2021-08-21 12:29:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:52,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:52,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:52,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994395794] [2021-08-21 12:29:52,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994395794] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:52,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:52,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:29:52,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455484880] [2021-08-21 12:29:52,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:29:52,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:52,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:29:52,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:29:52,267 INFO L87 Difference]: Start difference. First operand 12424 states and 56923 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) [2021-08-21 12:29:52,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:52,455 INFO L93 Difference]: Finished difference Result 22857 states and 102629 transitions. [2021-08-21 12:29:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:29:52,455 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 30 [2021-08-21 12:29:52,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:52,538 INFO L225 Difference]: With dead ends: 22857 [2021-08-21 12:29:52,538 INFO L226 Difference]: Without dead ends: 22667 [2021-08-21 12:29:52,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:29:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22667 states. [2021-08-21 12:29:53,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22667 to 18333. [2021-08-21 12:29:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18333 states, 18332 states have (on average 4.602280165830242) internal successors, (84369), 18332 states have internal predecessors, (84369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:53,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 84369 transitions. [2021-08-21 12:29:53,258 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 84369 transitions. Word has length 30 [2021-08-21 12:29:53,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:53,258 INFO L470 AbstractCegarLoop]: Abstraction has 18333 states and 84369 transitions. [2021-08-21 12:29:53,258 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) [2021-08-21 12:29:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 84369 transitions. [2021-08-21 12:29:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:29:53,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:53,301 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, 1] [2021-08-21 12:29:53,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 12:29:53,301 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:29:53,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:53,302 INFO L82 PathProgramCache]: Analyzing trace with hash -667683816, now seen corresponding path program 2 times [2021-08-21 12:29:53,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:53,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036082559] [2021-08-21 12:29:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:53,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:53,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:53,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036082559] [2021-08-21 12:29:53,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036082559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:53,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884013566] [2021-08-21 12:29:53,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:29:53,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:53,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:53,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:29:53,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:29:53,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:29:53,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:29:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:53,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884013566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:53,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:53,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-08-21 12:29:53,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634445873] [2021-08-21 12:29:53,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:29:53,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:53,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:29:53,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:29:53,530 INFO L87 Difference]: Start difference. First operand 18333 states and 84369 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:54,980 INFO L93 Difference]: Finished difference Result 64631 states and 282480 transitions. [2021-08-21 12:29:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:29:54,980 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:29:54,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:55,205 INFO L225 Difference]: With dead ends: 64631 [2021-08-21 12:29:55,206 INFO L226 Difference]: Without dead ends: 50671 [2021-08-21 12:29:55,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 451.6ms TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:29:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50671 states. [2021-08-21 12:29:56,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50671 to 22433. [2021-08-21 12:29:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22433 states, 22432 states have (on average 4.573511055634808) internal successors, (102593), 22432 states have internal predecessors, (102593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:56,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22433 states to 22433 states and 102593 transitions. [2021-08-21 12:29:56,420 INFO L78 Accepts]: Start accepts. Automaton has 22433 states and 102593 transitions. Word has length 30 [2021-08-21 12:29:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:56,421 INFO L470 AbstractCegarLoop]: Abstraction has 22433 states and 102593 transitions. [2021-08-21 12:29:56,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 22433 states and 102593 transitions. [2021-08-21 12:29:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:29:56,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:56,482 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, 1] [2021-08-21 12:29:56,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:29:56,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:56,698 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:29:56,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:56,698 INFO L82 PathProgramCache]: Analyzing trace with hash 990425401, now seen corresponding path program 2 times [2021-08-21 12:29:56,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:56,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171603628] [2021-08-21 12:29:56,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:56,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:56,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:56,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171603628] [2021-08-21 12:29:56,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171603628] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:56,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:56,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:29:56,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197033992] [2021-08-21 12:29:56,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:29:56,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:29:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:29:56,731 INFO L87 Difference]: Start difference. First operand 22433 states and 102593 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) [2021-08-21 12:29:56,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:56,917 INFO L93 Difference]: Finished difference Result 27166 states and 122184 transitions. [2021-08-21 12:29:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:29:56,917 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 30 [2021-08-21 12:29:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:57,203 INFO L225 Difference]: With dead ends: 27166 [2021-08-21 12:29:57,203 INFO L226 Difference]: Without dead ends: 26834 [2021-08-21 12:29:57,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:29:57,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26834 states. [2021-08-21 12:29:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26834 to 22633. [2021-08-21 12:29:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22633 states, 22632 states have (on average 4.55218275008837) internal successors, (103025), 22632 states have internal predecessors, (103025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22633 states to 22633 states and 103025 transitions. [2021-08-21 12:29:57,876 INFO L78 Accepts]: Start accepts. Automaton has 22633 states and 103025 transitions. Word has length 30 [2021-08-21 12:29:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:57,876 INFO L470 AbstractCegarLoop]: Abstraction has 22633 states and 103025 transitions. [2021-08-21 12:29:57,876 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) [2021-08-21 12:29:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 22633 states and 103025 transitions. [2021-08-21 12:29:57,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:29:57,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:57,931 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, 1] [2021-08-21 12:29:57,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 12:29:57,931 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:29:57,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:57,932 INFO L82 PathProgramCache]: Analyzing trace with hash 781962112, now seen corresponding path program 2 times [2021-08-21 12:29:57,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:57,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546436455] [2021-08-21 12:29:57,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:57,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:57,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:57,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546436455] [2021-08-21 12:29:57,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546436455] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:57,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:57,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:29:57,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953272214] [2021-08-21 12:29:57,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:29:57,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:57,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:29:57,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:29:57,965 INFO L87 Difference]: Start difference. First operand 22633 states and 103025 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) [2021-08-21 12:29:58,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:58,291 INFO L93 Difference]: Finished difference Result 24325 states and 108741 transitions. [2021-08-21 12:29:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:29:58,292 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 30 [2021-08-21 12:29:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:58,380 INFO L225 Difference]: With dead ends: 24325 [2021-08-21 12:29:58,380 INFO L226 Difference]: Without dead ends: 24325 [2021-08-21 12:29:58,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:29:58,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24325 states. [2021-08-21 12:29:58,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24325 to 21261. [2021-08-21 12:29:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21261 states, 21260 states have (on average 4.549952963311383) internal successors, (96732), 21260 states have internal predecessors, (96732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 96732 transitions. [2021-08-21 12:29:58,951 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 96732 transitions. Word has length 30 [2021-08-21 12:29:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:58,951 INFO L470 AbstractCegarLoop]: Abstraction has 21261 states and 96732 transitions. [2021-08-21 12:29:58,951 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) [2021-08-21 12:29:58,951 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 96732 transitions. [2021-08-21 12:29:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:29:58,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:58,995 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, 1] [2021-08-21 12:29:58,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 12:29:58,995 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:29:58,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:58,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2141067490, now seen corresponding path program 3 times [2021-08-21 12:29:58,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:58,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228501469] [2021-08-21 12:29:58,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:58,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:59,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:59,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228501469] [2021-08-21 12:29:59,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228501469] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:59,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:59,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:29:59,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613838628] [2021-08-21 12:29:59,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:29:59,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:59,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:29:59,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:29:59,028 INFO L87 Difference]: Start difference. First operand 21261 states and 96732 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 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) [2021-08-21 12:29:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:59,340 INFO L93 Difference]: Finished difference Result 22070 states and 97895 transitions. [2021-08-21 12:29:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:29:59,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 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 30 [2021-08-21 12:29:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:59,409 INFO L225 Difference]: With dead ends: 22070 [2021-08-21 12:29:59,410 INFO L226 Difference]: Without dead ends: 19364 [2021-08-21 12:29:59,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:29:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19364 states. [2021-08-21 12:29:59,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19364 to 13869. [2021-08-21 12:29:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13869 states, 13868 states have (on average 4.429838477069513) internal successors, (61433), 13868 states have internal predecessors, (61433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13869 states to 13869 states and 61433 transitions. [2021-08-21 12:29:59,924 INFO L78 Accepts]: Start accepts. Automaton has 13869 states and 61433 transitions. Word has length 30 [2021-08-21 12:29:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:59,924 INFO L470 AbstractCegarLoop]: Abstraction has 13869 states and 61433 transitions. [2021-08-21 12:29:59,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 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) [2021-08-21 12:29:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 13869 states and 61433 transitions. [2021-08-21 12:29:59,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:29:59,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:59,952 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, 1] [2021-08-21 12:29:59,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 12:29:59,952 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:29:59,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:59,952 INFO L82 PathProgramCache]: Analyzing trace with hash 169041953, now seen corresponding path program 2 times [2021-08-21 12:29:59,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:59,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904260070] [2021-08-21 12:29:59,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:59,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:59,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:59,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904260070] [2021-08-21 12:29:59,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904260070] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:29:59,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:29:59,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:29:59,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557005491] [2021-08-21 12:29:59,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:29:59,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:59,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:29:59,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:29:59,970 INFO L87 Difference]: Start difference. First operand 13869 states and 61433 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) [2021-08-21 12:30:00,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:00,117 INFO L93 Difference]: Finished difference Result 20880 states and 90831 transitions. [2021-08-21 12:30:00,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:30:00,117 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 30 [2021-08-21 12:30:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:00,179 INFO L225 Difference]: With dead ends: 20880 [2021-08-21 12:30:00,180 INFO L226 Difference]: Without dead ends: 20521 [2021-08-21 12:30:00,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20521 states. [2021-08-21 12:30:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20521 to 15337. [2021-08-21 12:30:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15337 states, 15336 states have (on average 4.414906103286385) internal successors, (67707), 15336 states have internal predecessors, (67707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15337 states to 15337 states and 67707 transitions. [2021-08-21 12:30:00,744 INFO L78 Accepts]: Start accepts. Automaton has 15337 states and 67707 transitions. Word has length 30 [2021-08-21 12:30:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:00,744 INFO L470 AbstractCegarLoop]: Abstraction has 15337 states and 67707 transitions. [2021-08-21 12:30:00,744 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) [2021-08-21 12:30:00,744 INFO L276 IsEmpty]: Start isEmpty. Operand 15337 states and 67707 transitions. [2021-08-21 12:30:00,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:30:00,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:00,775 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, 1] [2021-08-21 12:30:00,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 12:30:00,776 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:30:00,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:00,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1432170691, now seen corresponding path program 3 times [2021-08-21 12:30:00,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:00,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351672662] [2021-08-21 12:30:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:00,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:00,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:00,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351672662] [2021-08-21 12:30:00,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351672662] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:30:00,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:30:00,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:30:00,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482893419] [2021-08-21 12:30:00,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:30:00,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:00,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:30:00,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:00,838 INFO L87 Difference]: Start difference. First operand 15337 states and 67707 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 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) [2021-08-21 12:30:01,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:01,141 INFO L93 Difference]: Finished difference Result 19356 states and 85625 transitions. [2021-08-21 12:30:01,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:30:01,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 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 30 [2021-08-21 12:30:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:01,196 INFO L225 Difference]: With dead ends: 19356 [2021-08-21 12:30:01,196 INFO L226 Difference]: Without dead ends: 17254 [2021-08-21 12:30:01,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:01,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17254 states. [2021-08-21 12:30:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17254 to 13238. [2021-08-21 12:30:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13238 states, 13237 states have (on average 4.481755684822845) internal successors, (59325), 13237 states have internal predecessors, (59325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:01,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13238 states to 13238 states and 59325 transitions. [2021-08-21 12:30:01,735 INFO L78 Accepts]: Start accepts. Automaton has 13238 states and 59325 transitions. Word has length 30 [2021-08-21 12:30:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:01,741 INFO L470 AbstractCegarLoop]: Abstraction has 13238 states and 59325 transitions. [2021-08-21 12:30:01,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 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) [2021-08-21 12:30:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 13238 states and 59325 transitions. [2021-08-21 12:30:01,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:30:01,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:01,776 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, 1] [2021-08-21 12:30:01,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 12:30:01,776 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:30:01,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:01,776 INFO L82 PathProgramCache]: Analyzing trace with hash -576259964, now seen corresponding path program 3 times [2021-08-21 12:30:01,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:01,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198799929] [2021-08-21 12:30:01,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:01,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:01,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:01,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198799929] [2021-08-21 12:30:01,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198799929] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:30:01,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:30:01,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:30:01,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826377236] [2021-08-21 12:30:01,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:30:01,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:01,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:30:01,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:30:01,811 INFO L87 Difference]: Start difference. First operand 13238 states and 59325 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) [2021-08-21 12:30:02,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:02,006 INFO L93 Difference]: Finished difference Result 14893 states and 67180 transitions. [2021-08-21 12:30:02,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:30:02,008 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 30 [2021-08-21 12:30:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:02,065 INFO L225 Difference]: With dead ends: 14893 [2021-08-21 12:30:02,065 INFO L226 Difference]: Without dead ends: 13819 [2021-08-21 12:30:02,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13819 states. [2021-08-21 12:30:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13819 to 10861. [2021-08-21 12:30:02,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 4.560865561694291) internal successors, (49531), 10860 states have internal predecessors, (49531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 49531 transitions. [2021-08-21 12:30:02,538 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 49531 transitions. Word has length 30 [2021-08-21 12:30:02,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:02,540 INFO L470 AbstractCegarLoop]: Abstraction has 10861 states and 49531 transitions. [2021-08-21 12:30:02,540 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) [2021-08-21 12:30:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 49531 transitions. [2021-08-21 12:30:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:02,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:02,565 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:02,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-21 12:30:02,565 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:30:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:02,566 INFO L82 PathProgramCache]: Analyzing trace with hash 805676669, now seen corresponding path program 1 times [2021-08-21 12:30:02,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:02,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173862056] [2021-08-21 12:30:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:02,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:02,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:02,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173862056] [2021-08-21 12:30:02,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173862056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:02,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911342685] [2021-08-21 12:30:02,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:02,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:02,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:02,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:02,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:30:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:02,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:30:02,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:02,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911342685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:02,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:02,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 12:30:02,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747877001] [2021-08-21 12:30:02,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:02,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:02,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:02,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:02,816 INFO L87 Difference]: Start difference. First operand 10861 states and 49531 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:02,972 INFO L93 Difference]: Finished difference Result 16083 states and 73635 transitions. [2021-08-21 12:30:02,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:30:02,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:30:02,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:03,026 INFO L225 Difference]: With dead ends: 16083 [2021-08-21 12:30:03,026 INFO L226 Difference]: Without dead ends: 16083 [2021-08-21 12:30:03,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:03,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16083 states. [2021-08-21 12:30:03,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16083 to 11321. [2021-08-21 12:30:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11321 states, 11320 states have (on average 4.567667844522968) internal successors, (51706), 11320 states have internal predecessors, (51706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11321 states to 11321 states and 51706 transitions. [2021-08-21 12:30:03,410 INFO L78 Accepts]: Start accepts. Automaton has 11321 states and 51706 transitions. Word has length 36 [2021-08-21 12:30:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:03,410 INFO L470 AbstractCegarLoop]: Abstraction has 11321 states and 51706 transitions. [2021-08-21 12:30:03,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11321 states and 51706 transitions. [2021-08-21 12:30:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:30:03,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:03,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:03,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:03,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 12:30:03,635 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:30:03,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:03,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1566380201, now seen corresponding path program 1 times [2021-08-21 12:30:03,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:03,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739167416] [2021-08-21 12:30:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:03,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:03,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:03,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739167416] [2021-08-21 12:30:03,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739167416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:03,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578002586] [2021-08-21 12:30:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:03,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:03,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:03,785 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:03,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:30:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:03,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:30:03,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:04,076 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 11 treesize of output 7 [2021-08-21 12:30:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:04,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578002586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:04,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:04,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:30:04,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523629806] [2021-08-21 12:30:04,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:30:04,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:04,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:30:04,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:30:04,150 INFO L87 Difference]: Start difference. First operand 11321 states and 51706 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:04,986 INFO L93 Difference]: Finished difference Result 47246 states and 217897 transitions. [2021-08-21 12:30:04,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:30:04,987 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:30:04,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:05,319 INFO L225 Difference]: With dead ends: 47246 [2021-08-21 12:30:05,319 INFO L226 Difference]: Without dead ends: 22406 [2021-08-21 12:30:05,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:30:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22406 states. [2021-08-21 12:30:05,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22406 to 12265. [2021-08-21 12:30:05,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12265 states, 12264 states have (on average 4.510437051532942) internal successors, (55316), 12264 states have internal predecessors, (55316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12265 states to 12265 states and 55316 transitions. [2021-08-21 12:30:05,743 INFO L78 Accepts]: Start accepts. Automaton has 12265 states and 55316 transitions. Word has length 39 [2021-08-21 12:30:05,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:05,744 INFO L470 AbstractCegarLoop]: Abstraction has 12265 states and 55316 transitions. [2021-08-21 12:30:05,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 12265 states and 55316 transitions. [2021-08-21 12:30:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:30:05,771 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:05,771 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:05,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:05,981 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,SelfDestructingSolverStorable16 [2021-08-21 12:30:05,981 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:30:05,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:05,982 INFO L82 PathProgramCache]: Analyzing trace with hash -494818365, now seen corresponding path program 2 times [2021-08-21 12:30:05,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:05,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745222387] [2021-08-21 12:30:05,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:05,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:06,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:06,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745222387] [2021-08-21 12:30:06,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745222387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:06,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906349164] [2021-08-21 12:30:06,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:06,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:06,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:06,358 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:06,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:30:06,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:06,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:06,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:30:06,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:06,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-08-21 12:30:06,620 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 [2021-08-21 12:30:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:06,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906349164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:06,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:06,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-08-21 12:30:06,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143109811] [2021-08-21 12:30:06,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:30:06,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:06,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:30:06,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:30:06,675 INFO L87 Difference]: Start difference. First operand 12265 states and 55316 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) [2021-08-21 12:30:07,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:07,566 INFO L93 Difference]: Finished difference Result 44884 states and 205697 transitions. [2021-08-21 12:30:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:30:07,566 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 39 [2021-08-21 12:30:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:07,669 INFO L225 Difference]: With dead ends: 44884 [2021-08-21 12:30:07,669 INFO L226 Difference]: Without dead ends: 28673 [2021-08-21 12:30:07,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:30:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28673 states. [2021-08-21 12:30:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28673 to 12481. [2021-08-21 12:30:08,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12481 states, 12480 states have (on average 4.493429487179487) internal successors, (56078), 12480 states have internal predecessors, (56078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:08,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12481 states to 12481 states and 56078 transitions. [2021-08-21 12:30:08,316 INFO L78 Accepts]: Start accepts. Automaton has 12481 states and 56078 transitions. Word has length 39 [2021-08-21 12:30:08,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:08,316 INFO L470 AbstractCegarLoop]: Abstraction has 12481 states and 56078 transitions. [2021-08-21 12:30:08,316 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) [2021-08-21 12:30:08,316 INFO L276 IsEmpty]: Start isEmpty. Operand 12481 states and 56078 transitions. [2021-08-21 12:30:08,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:30:08,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:08,344 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:08,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:08,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 12:30:08,561 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:30:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:08,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1728772687, now seen corresponding path program 3 times [2021-08-21 12:30:08,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:08,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090633990] [2021-08-21 12:30:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:08,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:08,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:08,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090633990] [2021-08-21 12:30:08,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090633990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:08,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166787507] [2021-08-21 12:30:08,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:08,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:08,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:08,624 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:08,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:30:08,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:30:08,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:08,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:30:08,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:08,822 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 11 treesize of output 7 [2021-08-21 12:30:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:08,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166787507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:08,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:08,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 12:30:08,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672889586] [2021-08-21 12:30:08,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:30:08,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:08,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:30:08,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:30:08,903 INFO L87 Difference]: Start difference. First operand 12481 states and 56078 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:09,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:09,394 INFO L93 Difference]: Finished difference Result 28555 states and 129711 transitions. [2021-08-21 12:30:09,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:30:09,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 39 [2021-08-21 12:30:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:09,462 INFO L225 Difference]: With dead ends: 28555 [2021-08-21 12:30:09,462 INFO L226 Difference]: Without dead ends: 17145 [2021-08-21 12:30:09,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:30:09,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17145 states. [2021-08-21 12:30:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17145 to 11695. [2021-08-21 12:30:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11695 states, 11694 states have (on average 4.494783649734907) internal successors, (52562), 11694 states have internal predecessors, (52562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11695 states to 11695 states and 52562 transitions. [2021-08-21 12:30:09,795 INFO L78 Accepts]: Start accepts. Automaton has 11695 states and 52562 transitions. Word has length 39 [2021-08-21 12:30:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:09,795 INFO L470 AbstractCegarLoop]: Abstraction has 11695 states and 52562 transitions. [2021-08-21 12:30:09,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:09,795 INFO L276 IsEmpty]: Start isEmpty. Operand 11695 states and 52562 transitions. [2021-08-21 12:30:09,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:30:09,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:09,820 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:09,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:10,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:10,037 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:30:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:10,037 INFO L82 PathProgramCache]: Analyzing trace with hash -418305939, now seen corresponding path program 4 times [2021-08-21 12:30:10,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:10,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203684826] [2021-08-21 12:30:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:10,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:10,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:10,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203684826] [2021-08-21 12:30:10,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203684826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:10,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826371020] [2021-08-21 12:30:10,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:10,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:10,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:10,275 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:10,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:30:10,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:30:10,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:10,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:30:10,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:10,653 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 11 treesize of output 7 [2021-08-21 12:30:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:10,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826371020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:10,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:10,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:30:10,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610506824] [2021-08-21 12:30:10,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:30:10,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:10,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:30:10,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:30:10,735 INFO L87 Difference]: Start difference. First operand 11695 states and 52562 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:11,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:11,511 INFO L93 Difference]: Finished difference Result 41665 states and 191227 transitions. [2021-08-21 12:30:11,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:30:11,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:30:11,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:11,589 INFO L225 Difference]: With dead ends: 41665 [2021-08-21 12:30:11,589 INFO L226 Difference]: Without dead ends: 20790 [2021-08-21 12:30:11,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:30:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20790 states. [2021-08-21 12:30:11,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20790 to 11855. [2021-08-21 12:30:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11855 states, 11854 states have (on average 4.487599122659018) internal successors, (53196), 11854 states have internal predecessors, (53196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11855 states to 11855 states and 53196 transitions. [2021-08-21 12:30:12,053 INFO L78 Accepts]: Start accepts. Automaton has 11855 states and 53196 transitions. Word has length 39 [2021-08-21 12:30:12,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:12,066 INFO L470 AbstractCegarLoop]: Abstraction has 11855 states and 53196 transitions. [2021-08-21 12:30:12,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:12,067 INFO L276 IsEmpty]: Start isEmpty. Operand 11855 states and 53196 transitions. [2021-08-21 12:30:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:30:12,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:12,093 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:12,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-21 12:30:12,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:12,305 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:30:12,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:12,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1075994723, now seen corresponding path program 5 times [2021-08-21 12:30:12,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:12,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932131334] [2021-08-21 12:30:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:12,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:12,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:12,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932131334] [2021-08-21 12:30:12,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932131334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:12,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145006557] [2021-08-21 12:30:12,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:30:12,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:12,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:12,468 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:12,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:30:12,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:30:12,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:12,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:30:12,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:12,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-08-21 12:30:12,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2021-08-21 12:30:12,944 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 11 treesize of output 7 [2021-08-21 12:30:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:12,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145006557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:12,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:12,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-21 12:30:12,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506684874] [2021-08-21 12:30:12,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:30:12,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:12,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:30:12,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:30:12,983 INFO L87 Difference]: Start difference. First operand 11855 states and 53196 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:14,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:14,126 INFO L93 Difference]: Finished difference Result 30848 states and 139372 transitions. [2021-08-21 12:30:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:30:14,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 39 [2021-08-21 12:30:14,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:14,185 INFO L225 Difference]: With dead ends: 30848 [2021-08-21 12:30:14,186 INFO L226 Difference]: Without dead ends: 17834 [2021-08-21 12:30:14,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 611.7ms TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:30:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17834 states. [2021-08-21 12:30:14,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17834 to 12100. [2021-08-21 12:30:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12100 states, 12099 states have (on average 4.467311348045293) internal successors, (54050), 12099 states have internal predecessors, (54050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12100 states to 12100 states and 54050 transitions. [2021-08-21 12:30:14,555 INFO L78 Accepts]: Start accepts. Automaton has 12100 states and 54050 transitions. Word has length 39 [2021-08-21 12:30:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:14,555 INFO L470 AbstractCegarLoop]: Abstraction has 12100 states and 54050 transitions. [2021-08-21 12:30:14,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 12100 states and 54050 transitions. [2021-08-21 12:30:14,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:30:14,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:14,579 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:14,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:14,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:14,795 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:30:14,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:14,796 INFO L82 PathProgramCache]: Analyzing trace with hash 134337605, now seen corresponding path program 6 times [2021-08-21 12:30:14,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:14,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749846510] [2021-08-21 12:30:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:14,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:14,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:14,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749846510] [2021-08-21 12:30:14,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749846510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:14,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123305626] [2021-08-21 12:30:14,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:30:14,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:14,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:14,918 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:14,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:30:15,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:30:15,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:15,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:30:15,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:15,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-08-21 12:30:15,343 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 [2021-08-21 12:30:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:15,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123305626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:15,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:15,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 12:30:15,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614318412] [2021-08-21 12:30:15,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:30:15,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:15,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:30:15,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:30:15,396 INFO L87 Difference]: Start difference. First operand 12100 states and 54050 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:16,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:16,626 INFO L93 Difference]: Finished difference Result 38501 states and 174203 transitions. [2021-08-21 12:30:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:30:16,627 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:30:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:16,702 INFO L225 Difference]: With dead ends: 38501 [2021-08-21 12:30:16,703 INFO L226 Difference]: Without dead ends: 22306 [2021-08-21 12:30:16,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 495.2ms TimeCoverageRelationStatistics Valid=468, Invalid=1172, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:30:16,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22306 states. [2021-08-21 12:30:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22306 to 12385. [2021-08-21 12:30:16,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12385 states, 12384 states have (on average 4.465923772609819) internal successors, (55306), 12384 states have internal predecessors, (55306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:17,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12385 states to 12385 states and 55306 transitions. [2021-08-21 12:30:17,021 INFO L78 Accepts]: Start accepts. Automaton has 12385 states and 55306 transitions. Word has length 39 [2021-08-21 12:30:17,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:17,021 INFO L470 AbstractCegarLoop]: Abstraction has 12385 states and 55306 transitions. [2021-08-21 12:30:17,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 12385 states and 55306 transitions. [2021-08-21 12:30:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:30:17,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:17,047 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:17,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:17,247 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,SelfDestructingSolverStorable21 [2021-08-21 12:30:17,248 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:30:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash -515310098, now seen corresponding path program 7 times [2021-08-21 12:30:17,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:17,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301439595] [2021-08-21 12:30:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:17,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:17,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:17,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301439595] [2021-08-21 12:30:17,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301439595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:17,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118808560] [2021-08-21 12:30:17,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:30:17,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:17,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:17,289 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:17,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:30:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:17,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:30:17,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:17,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118808560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:17,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:17,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:30:17,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794026380] [2021-08-21 12:30:17,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:30:17,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:17,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:30:17,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:17,782 INFO L87 Difference]: Start difference. First operand 12385 states and 55306 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:18,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:18,018 INFO L93 Difference]: Finished difference Result 27249 states and 122597 transitions. [2021-08-21 12:30:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:18,018 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:30:18,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:18,108 INFO L225 Difference]: With dead ends: 27249 [2021-08-21 12:30:18,108 INFO L226 Difference]: Without dead ends: 27113 [2021-08-21 12:30:18,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:30:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27113 states. [2021-08-21 12:30:18,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27113 to 19810. [2021-08-21 12:30:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19810 states, 19809 states have (on average 4.61017719218537) internal successors, (91323), 19809 states have internal predecessors, (91323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19810 states to 19810 states and 91323 transitions. [2021-08-21 12:30:18,680 INFO L78 Accepts]: Start accepts. Automaton has 19810 states and 91323 transitions. Word has length 42 [2021-08-21 12:30:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:18,680 INFO L470 AbstractCegarLoop]: Abstraction has 19810 states and 91323 transitions. [2021-08-21 12:30:18,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 19810 states and 91323 transitions. [2021-08-21 12:30:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:30:18,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:18,824 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:18,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:19,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 12:30:19,028 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:30:19,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash -110682124, now seen corresponding path program 8 times [2021-08-21 12:30:19,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:19,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125696184] [2021-08-21 12:30:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:19,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:19,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:19,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125696184] [2021-08-21 12:30:19,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125696184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:19,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128427318] [2021-08-21 12:30:19,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:19,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:19,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:19,153 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:19,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:30:19,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:19,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:19,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:19,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:19,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128427318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:19,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:19,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 12:30:19,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539168694] [2021-08-21 12:30:19,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:30:19,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:19,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:30:19,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:30:19,565 INFO L87 Difference]: Start difference. First operand 19810 states and 91323 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:20,775 INFO L93 Difference]: Finished difference Result 82676 states and 367107 transitions. [2021-08-21 12:30:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 12:30:20,789 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:30:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:21,487 INFO L225 Difference]: With dead ends: 82676 [2021-08-21 12:30:21,488 INFO L226 Difference]: Without dead ends: 82676 [2021-08-21 12:30:21,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 12:30:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82676 states. [2021-08-21 12:30:23,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82676 to 36990. [2021-08-21 12:30:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36990 states, 36989 states have (on average 4.724107166995593) internal successors, (174740), 36989 states have internal predecessors, (174740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36990 states to 36990 states and 174740 transitions. [2021-08-21 12:30:23,570 INFO L78 Accepts]: Start accepts. Automaton has 36990 states and 174740 transitions. Word has length 42 [2021-08-21 12:30:23,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:23,570 INFO L470 AbstractCegarLoop]: Abstraction has 36990 states and 174740 transitions. [2021-08-21 12:30:23,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:23,570 INFO L276 IsEmpty]: Start isEmpty. Operand 36990 states and 174740 transitions. [2021-08-21 12:30:23,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:30:23,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:23,675 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:23,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:23,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 12:30:23,876 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:30:23,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:23,876 INFO L82 PathProgramCache]: Analyzing trace with hash -526915678, now seen corresponding path program 9 times [2021-08-21 12:30:23,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:23,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716088822] [2021-08-21 12:30:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:23,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:23,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:23,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716088822] [2021-08-21 12:30:23,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716088822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:23,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150914511] [2021-08-21 12:30:23,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:23,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:23,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:23,923 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:23,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:30:24,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:30:24,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:24,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:24,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:24,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150914511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:24,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:24,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 12:30:24,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223619379] [2021-08-21 12:30:24,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:30:24,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:24,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:30:24,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:30:24,342 INFO L87 Difference]: Start difference. First operand 36990 states and 174740 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:26,128 INFO L93 Difference]: Finished difference Result 113737 states and 542628 transitions. [2021-08-21 12:30:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:30:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:30:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:27,009 INFO L225 Difference]: With dead ends: 113737 [2021-08-21 12:30:27,010 INFO L226 Difference]: Without dead ends: 113627 [2021-08-21 12:30:27,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:30:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113627 states. [2021-08-21 12:30:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113627 to 77752. [2021-08-21 12:30:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77752 states, 77751 states have (on average 4.973543748633458) internal successors, (386698), 77751 states have internal predecessors, (386698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:30,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77752 states to 77752 states and 386698 transitions. [2021-08-21 12:30:30,726 INFO L78 Accepts]: Start accepts. Automaton has 77752 states and 386698 transitions. Word has length 42 [2021-08-21 12:30:30,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:30,726 INFO L470 AbstractCegarLoop]: Abstraction has 77752 states and 386698 transitions. [2021-08-21 12:30:30,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:30,726 INFO L276 IsEmpty]: Start isEmpty. Operand 77752 states and 386698 transitions. [2021-08-21 12:30:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:30:31,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:31,129 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:31,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:31,348 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,SelfDestructingSolverStorable24 [2021-08-21 12:30:31,348 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:30:31,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:31,350 INFO L82 PathProgramCache]: Analyzing trace with hash -399095643, now seen corresponding path program 10 times [2021-08-21 12:30:31,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:31,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848258650] [2021-08-21 12:30:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:31,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:31,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:31,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848258650] [2021-08-21 12:30:31,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848258650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:31,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836777404] [2021-08-21 12:30:31,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:31,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:31,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:31,449 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:31,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:30:31,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:30:31,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:31,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:31,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:31,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836777404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:31,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:31,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-08-21 12:30:31,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454022680] [2021-08-21 12:30:31,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:30:31,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:31,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:30:31,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:30:31,920 INFO L87 Difference]: Start difference. First operand 77752 states and 386698 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:34,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:34,143 INFO L93 Difference]: Finished difference Result 180946 states and 909108 transitions. [2021-08-21 12:30:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:30:34,143 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:30:34,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:35,616 INFO L225 Difference]: With dead ends: 180946 [2021-08-21 12:30:35,617 INFO L226 Difference]: Without dead ends: 175421 [2021-08-21 12:30:35,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:30:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175421 states. [2021-08-21 12:30:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175421 to 146812. [2021-08-21 12:30:40,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146812 states, 146811 states have (on average 5.126325684042749) internal successors, (752601), 146811 states have internal predecessors, (752601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:42,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146812 states to 146812 states and 752601 transitions. [2021-08-21 12:30:42,083 INFO L78 Accepts]: Start accepts. Automaton has 146812 states and 752601 transitions. Word has length 42 [2021-08-21 12:30:42,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:42,084 INFO L470 AbstractCegarLoop]: Abstraction has 146812 states and 752601 transitions. [2021-08-21 12:30:42,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:42,084 INFO L276 IsEmpty]: Start isEmpty. Operand 146812 states and 752601 transitions. [2021-08-21 12:30:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:30:42,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:42,971 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:42,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:43,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:43,175 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:30:43,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:43,175 INFO L82 PathProgramCache]: Analyzing trace with hash 62522503, now seen corresponding path program 11 times [2021-08-21 12:30:43,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:43,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676064273] [2021-08-21 12:30:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:43,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:43,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:43,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676064273] [2021-08-21 12:30:43,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676064273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:43,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956164036] [2021-08-21 12:30:43,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:30:43,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:43,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:43,209 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:43,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:30:43,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:30:43,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:43,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:30:43,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:43,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956164036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:43,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:43,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 12:30:43,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779286796] [2021-08-21 12:30:43,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:30:43,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:43,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:30:43,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:30:43,668 INFO L87 Difference]: Start difference. First operand 146812 states and 752601 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:48,976 INFO L93 Difference]: Finished difference Result 370786 states and 1885721 transitions. [2021-08-21 12:30:48,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:30:48,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 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 42 [2021-08-21 12:30:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:52,916 INFO L225 Difference]: With dead ends: 370786 [2021-08-21 12:30:52,916 INFO L226 Difference]: Without dead ends: 363752 [2021-08-21 12:30:52,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:30:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363752 states. [2021-08-21 12:31:05,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363752 to 272461. [2021-08-21 12:31:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272461 states, 272460 states have (on average 5.233524187036629) internal successors, (1425926), 272460 states have internal predecessors, (1425926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272461 states to 272461 states and 1425926 transitions. [2021-08-21 12:31:09,485 INFO L78 Accepts]: Start accepts. Automaton has 272461 states and 1425926 transitions. Word has length 42 [2021-08-21 12:31:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:09,486 INFO L470 AbstractCegarLoop]: Abstraction has 272461 states and 1425926 transitions. [2021-08-21 12:31:09,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 272461 states and 1425926 transitions. [2021-08-21 12:31:11,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 12:31:11,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:11,540 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:11,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:11,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 12:31:11,757 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 12:31:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:11,758 INFO L82 PathProgramCache]: Analyzing trace with hash -393856119, now seen corresponding path program 12 times [2021-08-21 12:31:11,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:11,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203174370] [2021-08-21 12:31:11,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:11,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:31:11,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:11,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203174370] [2021-08-21 12:31:11,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203174370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:11,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989216589] [2021-08-21 12:31:11,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:31:11,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:11,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:11,815 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:11,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:31:12,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:31:12,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:12,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:31:12,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:12,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989216589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:12,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:12,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 12:31:12,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315336672] [2021-08-21 12:31:12,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:31:12,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:12,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:31:12,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:31:12,524 INFO L87 Difference]: Start difference. First operand 272461 states and 1425926 transitions. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)