/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/ticket-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:47:32,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:47:32,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:47:32,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:47:32,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-06 14:47:32,209 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:47:32,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:47:32,210 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:47:32,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:47:32,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:47:32,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:47:32,213 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:47:32,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:47:32,213 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:47:32,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:47:32,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:47:32,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:47:32,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:47:32,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:47:32,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:47:32,215 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:47:32,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:47:32,215 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:47:32,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:47:32,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:47:32,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:47:32,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:47:32,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:47:32,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:47:32,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:47:32,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:47:32,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:47:32,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:47:32,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:47:32,217 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:47:32,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:47:32,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:47:32,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:47:32,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:47:32,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:47:32,516 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:47:32,520 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:47:32,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-4.wvr.bpl [2021-08-06 14:47:32,522 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-4.wvr.bpl' [2021-08-06 14:47:32,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:47:32,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:47:32,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:47:32,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:47:32,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:47:32,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:32" (1/1) ... [2021-08-06 14:47:32,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:32" (1/1) ... [2021-08-06 14:47:32,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:47:32,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:47:32,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:47:32,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:47:32,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:32" (1/1) ... [2021-08-06 14:47:32,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:32" (1/1) ... [2021-08-06 14:47:32,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:32" (1/1) ... [2021-08-06 14:47:32,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:32" (1/1) ... [2021-08-06 14:47:32,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:32" (1/1) ... [2021-08-06 14:47:32,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:32" (1/1) ... [2021-08-06 14:47:32,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:32" (1/1) ... [2021-08-06 14:47:32,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:47:32,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:47:32,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:47:32,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:47:32,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:32" (1/1) ... [2021-08-06 14:47:32,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:47:32,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:32,647 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 14:47:32,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 14:47:32,675 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:47:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:47:32,676 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:47:32,676 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:47:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:47:32,676 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:47:32,676 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:47:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:47:32,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:47:32,677 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 14:47:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 14:47:32,677 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 14:47:32,677 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-06 14:47:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-06 14:47:32,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-06 14:47:32,679 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 14:47:32,861 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:47:32,861 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 14:47:32,863 INFO L202 PluginConnector]: Adding new model ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:47:32 BoogieIcfgContainer [2021-08-06 14:47:32,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:47:32,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:47:32,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:47:32,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:47:32,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:32" (1/2) ... [2021-08-06 14:47:32,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c038f0b and model type ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:47:32, skipping insertion in model container [2021-08-06 14:47:32,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:47:32" (2/2) ... [2021-08-06 14:47:32,870 INFO L111 eAbstractionObserver]: Analyzing ICFG ticket-4.wvr.bpl [2021-08-06 14:47:32,873 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:47:32,874 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:47:32,874 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:47:32,874 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:47:32,935 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-06 14:47:32,986 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:47:32,992 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 14:47:32,992 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-06 14:47:33,001 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 38 transitions, 108 flow [2021-08-06 14:47:33,155 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2076 states, 2075 states have (on average 3.3532530120481927) internal successors, (6958), 2075 states have internal predecessors, (6958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:33,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 2076 states, 2075 states have (on average 3.3532530120481927) internal successors, (6958), 2075 states have internal predecessors, (6958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:33,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:33,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:33,194 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] [2021-08-06 14:47:33,195 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:33,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:33,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1859282422, now seen corresponding path program 1 times [2021-08-06 14:47:33,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:33,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833236261] [2021-08-06 14:47:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:33,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:33,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:33,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833236261] [2021-08-06 14:47:33,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833236261] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:33,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:33,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:47:33,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504964278] [2021-08-06 14:47:33,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:47:33,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:33,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:47:33,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:47:33,540 INFO L87 Difference]: Start difference. First operand has 2076 states, 2075 states have (on average 3.3532530120481927) internal successors, (6958), 2075 states have internal predecessors, (6958), 0 states have call successors, (0), 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 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:33,818 INFO L93 Difference]: Finished difference Result 4631 states and 14853 transitions. [2021-08-06 14:47:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:47:33,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:33,878 INFO L225 Difference]: With dead ends: 4631 [2021-08-06 14:47:33,878 INFO L226 Difference]: Without dead ends: 4631 [2021-08-06 14:47:33,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:47:33,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2021-08-06 14:47:34,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2449. [2021-08-06 14:47:34,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2449 states, 2448 states have (on average 3.2834967320261437) internal successors, (8038), 2448 states have internal predecessors, (8038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 8038 transitions. [2021-08-06 14:47:34,094 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 8038 transitions. Word has length 32 [2021-08-06 14:47:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:34,095 INFO L470 AbstractCegarLoop]: Abstraction has 2449 states and 8038 transitions. [2021-08-06 14:47:34,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 8038 transitions. [2021-08-06 14:47:34,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:34,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:34,103 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] [2021-08-06 14:47:34,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:47:34,103 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:34,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:34,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1037503212, now seen corresponding path program 2 times [2021-08-06 14:47:34,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:34,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943960761] [2021-08-06 14:47:34,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:34,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:34,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:34,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943960761] [2021-08-06 14:47:34,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943960761] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:34,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:34,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:47:34,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811749995] [2021-08-06 14:47:34,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:47:34,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:34,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:47:34,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:47:34,252 INFO L87 Difference]: Start difference. First operand 2449 states and 8038 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:34,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:34,356 INFO L93 Difference]: Finished difference Result 3557 states and 11583 transitions. [2021-08-06 14:47:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:47:34,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:34,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:34,377 INFO L225 Difference]: With dead ends: 3557 [2021-08-06 14:47:34,378 INFO L226 Difference]: Without dead ends: 2328 [2021-08-06 14:47:34,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:47:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-06 14:47:34,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2328. [2021-08-06 14:47:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 3.1637301246239793) internal successors, (7362), 2327 states have internal predecessors, (7362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 7362 transitions. [2021-08-06 14:47:34,463 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 7362 transitions. Word has length 32 [2021-08-06 14:47:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:34,464 INFO L470 AbstractCegarLoop]: Abstraction has 2328 states and 7362 transitions. [2021-08-06 14:47:34,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 7362 transitions. [2021-08-06 14:47:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:34,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:34,475 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] [2021-08-06 14:47:34,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 14:47:34,476 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:34,476 INFO L82 PathProgramCache]: Analyzing trace with hash 272388534, now seen corresponding path program 3 times [2021-08-06 14:47:34,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:34,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975909465] [2021-08-06 14:47:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:34,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:34,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:34,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975909465] [2021-08-06 14:47:34,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975909465] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:34,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:34,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:47:34,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952949419] [2021-08-06 14:47:34,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:47:34,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:34,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:47:34,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:47:34,580 INFO L87 Difference]: Start difference. First operand 2328 states and 7362 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:34,714 INFO L93 Difference]: Finished difference Result 3796 states and 11479 transitions. [2021-08-06 14:47:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:47:34,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:34,741 INFO L225 Difference]: With dead ends: 3796 [2021-08-06 14:47:34,746 INFO L226 Difference]: Without dead ends: 3752 [2021-08-06 14:47:34,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:47:34,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2021-08-06 14:47:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 2380. [2021-08-06 14:47:34,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 3.051282051282051) internal successors, (7259), 2379 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 7259 transitions. [2021-08-06 14:47:34,861 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 7259 transitions. Word has length 32 [2021-08-06 14:47:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:34,861 INFO L470 AbstractCegarLoop]: Abstraction has 2380 states and 7259 transitions. [2021-08-06 14:47:34,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 7259 transitions. [2021-08-06 14:47:34,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:34,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:34,870 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] [2021-08-06 14:47:34,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 14:47:34,871 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:34,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:34,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2016061640, now seen corresponding path program 4 times [2021-08-06 14:47:34,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:34,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93310597] [2021-08-06 14:47:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:34,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:35,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:35,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93310597] [2021-08-06 14:47:35,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93310597] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:35,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:35,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 14:47:35,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013195496] [2021-08-06 14:47:35,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:47:35,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:35,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:47:35,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:47:35,015 INFO L87 Difference]: Start difference. First operand 2380 states and 7259 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:35,160 INFO L93 Difference]: Finished difference Result 4075 states and 12124 transitions. [2021-08-06 14:47:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:47:35,160 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:35,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:35,191 INFO L225 Difference]: With dead ends: 4075 [2021-08-06 14:47:35,191 INFO L226 Difference]: Without dead ends: 4027 [2021-08-06 14:47:35,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:47:35,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4027 states. [2021-08-06 14:47:35,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4027 to 2348. [2021-08-06 14:47:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2348 states, 2347 states have (on average 3.033233915636983) internal successors, (7119), 2347 states have internal predecessors, (7119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:35,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2348 states to 2348 states and 7119 transitions. [2021-08-06 14:47:35,286 INFO L78 Accepts]: Start accepts. Automaton has 2348 states and 7119 transitions. Word has length 32 [2021-08-06 14:47:35,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:35,289 INFO L470 AbstractCegarLoop]: Abstraction has 2348 states and 7119 transitions. [2021-08-06 14:47:35,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:35,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2348 states and 7119 transitions. [2021-08-06 14:47:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:35,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:35,322 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] [2021-08-06 14:47:35,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 14:47:35,322 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:35,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:35,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1363338346, now seen corresponding path program 5 times [2021-08-06 14:47:35,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:35,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707352902] [2021-08-06 14:47:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:35,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:35,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:35,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707352902] [2021-08-06 14:47:35,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707352902] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:35,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:35,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:47:35,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710351854] [2021-08-06 14:47:35,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:47:35,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:35,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:47:35,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:47:35,424 INFO L87 Difference]: Start difference. First operand 2348 states and 7119 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:35,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:35,594 INFO L93 Difference]: Finished difference Result 4192 states and 12353 transitions. [2021-08-06 14:47:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:47:35,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:35,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:35,610 INFO L225 Difference]: With dead ends: 4192 [2021-08-06 14:47:35,610 INFO L226 Difference]: Without dead ends: 4048 [2021-08-06 14:47:35,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:47:35,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4048 states. [2021-08-06 14:47:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4048 to 2389. [2021-08-06 14:47:35,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 3.009212730318258) internal successors, (7186), 2388 states have internal predecessors, (7186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 7186 transitions. [2021-08-06 14:47:35,726 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 7186 transitions. Word has length 32 [2021-08-06 14:47:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:35,727 INFO L470 AbstractCegarLoop]: Abstraction has 2389 states and 7186 transitions. [2021-08-06 14:47:35,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 7186 transitions. [2021-08-06 14:47:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:35,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:35,736 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] [2021-08-06 14:47:35,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 14:47:35,737 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:35,737 INFO L82 PathProgramCache]: Analyzing trace with hash -968025832, now seen corresponding path program 6 times [2021-08-06 14:47:35,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:35,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058950709] [2021-08-06 14:47:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:35,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:35,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:35,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058950709] [2021-08-06 14:47:35,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058950709] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:35,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:35,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 14:47:35,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080459517] [2021-08-06 14:47:35,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:47:35,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:35,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:47:35,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:47:35,802 INFO L87 Difference]: Start difference. First operand 2389 states and 7186 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:35,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:35,961 INFO L93 Difference]: Finished difference Result 4046 states and 11863 transitions. [2021-08-06 14:47:35,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:47:35,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:35,976 INFO L225 Difference]: With dead ends: 4046 [2021-08-06 14:47:35,976 INFO L226 Difference]: Without dead ends: 4002 [2021-08-06 14:47:35,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:47:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2021-08-06 14:47:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 2467. [2021-08-06 14:47:36,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 2466 states have (on average 2.981346309813463) internal successors, (7352), 2466 states have internal predecessors, (7352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 7352 transitions. [2021-08-06 14:47:36,073 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 7352 transitions. Word has length 32 [2021-08-06 14:47:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:36,074 INFO L470 AbstractCegarLoop]: Abstraction has 2467 states and 7352 transitions. [2021-08-06 14:47:36,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 7352 transitions. [2021-08-06 14:47:36,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:36,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:36,081 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] [2021-08-06 14:47:36,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 14:47:36,081 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:36,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:36,082 INFO L82 PathProgramCache]: Analyzing trace with hash 490021238, now seen corresponding path program 7 times [2021-08-06 14:47:36,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:36,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517861879] [2021-08-06 14:47:36,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:36,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:36,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:36,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517861879] [2021-08-06 14:47:36,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517861879] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:36,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:36,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:47:36,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215174241] [2021-08-06 14:47:36,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:47:36,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:36,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:47:36,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:47:36,186 INFO L87 Difference]: Start difference. First operand 2467 states and 7352 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:36,420 INFO L93 Difference]: Finished difference Result 4284 states and 12351 transitions. [2021-08-06 14:47:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:47:36,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:36,433 INFO L225 Difference]: With dead ends: 4284 [2021-08-06 14:47:36,434 INFO L226 Difference]: Without dead ends: 4176 [2021-08-06 14:47:36,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:47:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-08-06 14:47:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 2547. [2021-08-06 14:47:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 2.9571877454831106) internal successors, (7529), 2546 states have internal predecessors, (7529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 7529 transitions. [2021-08-06 14:47:36,506 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 7529 transitions. Word has length 32 [2021-08-06 14:47:36,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:36,506 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 7529 transitions. [2021-08-06 14:47:36,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 7529 transitions. [2021-08-06 14:47:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:36,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:36,514 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] [2021-08-06 14:47:36,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 14:47:36,514 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:36,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:36,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1381398922, now seen corresponding path program 8 times [2021-08-06 14:47:36,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:36,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626739014] [2021-08-06 14:47:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:36,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:36,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:36,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626739014] [2021-08-06 14:47:36,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626739014] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:36,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:36,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 14:47:36,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874855498] [2021-08-06 14:47:36,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:47:36,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:36,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:47:36,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:47:36,601 INFO L87 Difference]: Start difference. First operand 2547 states and 7529 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:36,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:36,743 INFO L93 Difference]: Finished difference Result 3902 states and 11122 transitions. [2021-08-06 14:47:36,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:47:36,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:36,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:36,756 INFO L225 Difference]: With dead ends: 3902 [2021-08-06 14:47:36,756 INFO L226 Difference]: Without dead ends: 3890 [2021-08-06 14:47:36,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:47:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2021-08-06 14:47:36,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 2497. [2021-08-06 14:47:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2496 states have (on average 2.890224358974359) internal successors, (7214), 2496 states have internal predecessors, (7214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:36,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 7214 transitions. [2021-08-06 14:47:36,827 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 7214 transitions. Word has length 32 [2021-08-06 14:47:36,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:36,827 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 7214 transitions. [2021-08-06 14:47:36,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 7214 transitions. [2021-08-06 14:47:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:36,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:36,834 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] [2021-08-06 14:47:36,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 14:47:36,834 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:36,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:36,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1848872406, now seen corresponding path program 9 times [2021-08-06 14:47:36,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:36,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960960115] [2021-08-06 14:47:36,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:36,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:36,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:36,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960960115] [2021-08-06 14:47:36,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960960115] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:36,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:36,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:47:36,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29040765] [2021-08-06 14:47:36,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:47:36,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:36,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:47:36,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:47:36,900 INFO L87 Difference]: Start difference. First operand 2497 states and 7214 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:37,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:37,084 INFO L93 Difference]: Finished difference Result 2921 states and 7631 transitions. [2021-08-06 14:47:37,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:47:37,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:37,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:37,092 INFO L225 Difference]: With dead ends: 2921 [2021-08-06 14:47:37,093 INFO L226 Difference]: Without dead ends: 2719 [2021-08-06 14:47:37,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:47:37,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-08-06 14:47:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 1853. [2021-08-06 14:47:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 2.6906047516198703) internal successors, (4983), 1852 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 4983 transitions. [2021-08-06 14:47:37,142 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 4983 transitions. Word has length 32 [2021-08-06 14:47:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:37,143 INFO L470 AbstractCegarLoop]: Abstraction has 1853 states and 4983 transitions. [2021-08-06 14:47:37,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 4983 transitions. [2021-08-06 14:47:37,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:37,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:37,148 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] [2021-08-06 14:47:37,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 14:47:37,148 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:37,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:37,148 INFO L82 PathProgramCache]: Analyzing trace with hash -970739558, now seen corresponding path program 10 times [2021-08-06 14:47:37,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:37,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269162251] [2021-08-06 14:47:37,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:37,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:37,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:37,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269162251] [2021-08-06 14:47:37,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269162251] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:37,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:37,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 14:47:37,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238434944] [2021-08-06 14:47:37,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:47:37,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:37,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:47:37,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:47:37,204 INFO L87 Difference]: Start difference. First operand 1853 states and 4983 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:37,348 INFO L93 Difference]: Finished difference Result 3038 states and 7985 transitions. [2021-08-06 14:47:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:47:37,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:37,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:37,357 INFO L225 Difference]: With dead ends: 3038 [2021-08-06 14:47:37,357 INFO L226 Difference]: Without dead ends: 2990 [2021-08-06 14:47:37,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:47:37,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2021-08-06 14:47:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 1829. [2021-08-06 14:47:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 2.6756017505470457) internal successors, (4891), 1828 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 4891 transitions. [2021-08-06 14:47:37,408 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 4891 transitions. Word has length 32 [2021-08-06 14:47:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:37,409 INFO L470 AbstractCegarLoop]: Abstraction has 1829 states and 4891 transitions. [2021-08-06 14:47:37,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:37,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 4891 transitions. [2021-08-06 14:47:37,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:37,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:37,413 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] [2021-08-06 14:47:37,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-06 14:47:37,414 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:37,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:37,414 INFO L82 PathProgramCache]: Analyzing trace with hash -318016264, now seen corresponding path program 11 times [2021-08-06 14:47:37,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:37,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784570932] [2021-08-06 14:47:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:37,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:37,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:37,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784570932] [2021-08-06 14:47:37,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784570932] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:37,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:37,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:47:37,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769927105] [2021-08-06 14:47:37,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:47:37,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:37,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:47:37,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:47:37,473 INFO L87 Difference]: Start difference. First operand 1829 states and 4891 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:37,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:37,640 INFO L93 Difference]: Finished difference Result 3002 states and 7863 transitions. [2021-08-06 14:47:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:47:37,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:37,648 INFO L225 Difference]: With dead ends: 3002 [2021-08-06 14:47:37,648 INFO L226 Difference]: Without dead ends: 2834 [2021-08-06 14:47:37,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:47:37,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-08-06 14:47:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1757. [2021-08-06 14:47:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1756 states have (on average 2.665717539863326) internal successors, (4681), 1756 states have internal predecessors, (4681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 4681 transitions. [2021-08-06 14:47:37,686 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 4681 transitions. Word has length 32 [2021-08-06 14:47:37,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:37,686 INFO L470 AbstractCegarLoop]: Abstraction has 1757 states and 4681 transitions. [2021-08-06 14:47:37,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 4681 transitions. [2021-08-06 14:47:37,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:37,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:37,690 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] [2021-08-06 14:47:37,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-06 14:47:37,690 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:37,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:37,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2076615436, now seen corresponding path program 12 times [2021-08-06 14:47:37,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:37,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627663262] [2021-08-06 14:47:37,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:37,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:37,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:37,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627663262] [2021-08-06 14:47:37,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627663262] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:37,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:37,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:47:37,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338158974] [2021-08-06 14:47:37,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:47:37,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:37,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:47:37,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:47:37,767 INFO L87 Difference]: Start difference. First operand 1757 states and 4681 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:37,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:37,999 INFO L93 Difference]: Finished difference Result 2972 states and 7731 transitions. [2021-08-06 14:47:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:47:37,999 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:38,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:38,007 INFO L225 Difference]: With dead ends: 2972 [2021-08-06 14:47:38,007 INFO L226 Difference]: Without dead ends: 2792 [2021-08-06 14:47:38,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:38,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-08-06 14:47:38,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 1715. [2021-08-06 14:47:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1714 states have (on average 2.6586931155192532) internal successors, (4557), 1714 states have internal predecessors, (4557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 4557 transitions. [2021-08-06 14:47:38,045 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 4557 transitions. Word has length 32 [2021-08-06 14:47:38,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:38,045 INFO L470 AbstractCegarLoop]: Abstraction has 1715 states and 4557 transitions. [2021-08-06 14:47:38,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 4557 transitions. [2021-08-06 14:47:38,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:38,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:38,051 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] [2021-08-06 14:47:38,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-06 14:47:38,051 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:38,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:38,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1009252986, now seen corresponding path program 13 times [2021-08-06 14:47:38,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:38,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223442015] [2021-08-06 14:47:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:38,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:38,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:38,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223442015] [2021-08-06 14:47:38,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223442015] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:38,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:38,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 14:47:38,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820625088] [2021-08-06 14:47:38,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:47:38,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:38,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:47:38,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:47:38,107 INFO L87 Difference]: Start difference. First operand 1715 states and 4557 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:38,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:38,257 INFO L93 Difference]: Finished difference Result 2909 states and 7590 transitions. [2021-08-06 14:47:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:47:38,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:38,265 INFO L225 Difference]: With dead ends: 2909 [2021-08-06 14:47:38,266 INFO L226 Difference]: Without dead ends: 2873 [2021-08-06 14:47:38,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:47:38,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2021-08-06 14:47:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 1632. [2021-08-06 14:47:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 2.6241569589209073) internal successors, (4280), 1631 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 4280 transitions. [2021-08-06 14:47:38,319 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 4280 transitions. Word has length 32 [2021-08-06 14:47:38,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:38,320 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 4280 transitions. [2021-08-06 14:47:38,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 4280 transitions. [2021-08-06 14:47:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:38,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:38,325 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] [2021-08-06 14:47:38,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-06 14:47:38,325 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:38,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:38,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1827667240, now seen corresponding path program 14 times [2021-08-06 14:47:38,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:38,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537036130] [2021-08-06 14:47:38,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:38,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:38,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:38,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537036130] [2021-08-06 14:47:38,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537036130] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:38,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:38,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:47:38,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421124895] [2021-08-06 14:47:38,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:47:38,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:38,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:47:38,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:47:38,387 INFO L87 Difference]: Start difference. First operand 1632 states and 4280 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:38,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:38,553 INFO L93 Difference]: Finished difference Result 2785 states and 7226 transitions. [2021-08-06 14:47:38,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:47:38,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:38,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:38,560 INFO L225 Difference]: With dead ends: 2785 [2021-08-06 14:47:38,560 INFO L226 Difference]: Without dead ends: 2701 [2021-08-06 14:47:38,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:47:38,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-08-06 14:47:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 1572. [2021-08-06 14:47:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 2.602800763844685) internal successors, (4089), 1571 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:38,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 4089 transitions. [2021-08-06 14:47:38,595 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 4089 transitions. Word has length 32 [2021-08-06 14:47:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:38,595 INFO L470 AbstractCegarLoop]: Abstraction has 1572 states and 4089 transitions. [2021-08-06 14:47:38,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 4089 transitions. [2021-08-06 14:47:38,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:38,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:38,599 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] [2021-08-06 14:47:38,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-06 14:47:38,599 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:38,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:38,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1232827092, now seen corresponding path program 15 times [2021-08-06 14:47:38,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:38,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527435597] [2021-08-06 14:47:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:38,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:38,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:38,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527435597] [2021-08-06 14:47:38,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527435597] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:38,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:38,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:47:38,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799810871] [2021-08-06 14:47:38,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:47:38,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:38,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:47:38,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:47:38,663 INFO L87 Difference]: Start difference. First operand 1572 states and 4089 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:38,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:38,901 INFO L93 Difference]: Finished difference Result 2741 states and 7066 transitions. [2021-08-06 14:47:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:47:38,902 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:38,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:38,908 INFO L225 Difference]: With dead ends: 2741 [2021-08-06 14:47:38,909 INFO L226 Difference]: Without dead ends: 2642 [2021-08-06 14:47:38,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:38,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-08-06 14:47:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1525. [2021-08-06 14:47:38,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 2.5990813648293964) internal successors, (3961), 1524 states have internal predecessors, (3961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:38,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 3961 transitions. [2021-08-06 14:47:38,944 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 3961 transitions. Word has length 32 [2021-08-06 14:47:38,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:38,944 INFO L470 AbstractCegarLoop]: Abstraction has 1525 states and 3961 transitions. [2021-08-06 14:47:38,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:38,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 3961 transitions. [2021-08-06 14:47:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:38,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:38,948 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] [2021-08-06 14:47:38,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-06 14:47:38,948 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:38,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:38,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1017116182, now seen corresponding path program 16 times [2021-08-06 14:47:38,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:38,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452535745] [2021-08-06 14:47:38,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:38,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:39,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:39,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452535745] [2021-08-06 14:47:39,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452535745] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:39,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:39,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:47:39,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803692649] [2021-08-06 14:47:39,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:47:39,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:47:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:47:39,018 INFO L87 Difference]: Start difference. First operand 1525 states and 3961 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:39,177 INFO L93 Difference]: Finished difference Result 2648 states and 6780 transitions. [2021-08-06 14:47:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:47:39,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:39,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:39,184 INFO L225 Difference]: With dead ends: 2648 [2021-08-06 14:47:39,184 INFO L226 Difference]: Without dead ends: 2576 [2021-08-06 14:47:39,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:47:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-08-06 14:47:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 1464. [2021-08-06 14:47:39,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 2.5598086124401913) internal successors, (3745), 1463 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:39,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 3745 transitions. [2021-08-06 14:47:39,215 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 3745 transitions. Word has length 32 [2021-08-06 14:47:39,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:39,215 INFO L470 AbstractCegarLoop]: Abstraction has 1464 states and 3745 transitions. [2021-08-06 14:47:39,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:39,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 3745 transitions. [2021-08-06 14:47:39,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:39,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:39,219 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] [2021-08-06 14:47:39,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-06 14:47:39,219 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:39,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:39,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1433444212, now seen corresponding path program 17 times [2021-08-06 14:47:39,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:39,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846148230] [2021-08-06 14:47:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:39,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:39,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:39,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846148230] [2021-08-06 14:47:39,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846148230] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:39,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:39,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:47:39,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289751536] [2021-08-06 14:47:39,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:47:39,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:39,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:47:39,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:47:39,313 INFO L87 Difference]: Start difference. First operand 1464 states and 3745 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:39,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:39,554 INFO L93 Difference]: Finished difference Result 2588 states and 6572 transitions. [2021-08-06 14:47:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:47:39,554 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:39,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:39,560 INFO L225 Difference]: With dead ends: 2588 [2021-08-06 14:47:39,560 INFO L226 Difference]: Without dead ends: 2505 [2021-08-06 14:47:39,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:39,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-08-06 14:47:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 1418. [2021-08-06 14:47:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 2.5772759350741) internal successors, (3652), 1417 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 3652 transitions. [2021-08-06 14:47:39,595 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 3652 transitions. Word has length 32 [2021-08-06 14:47:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:39,595 INFO L470 AbstractCegarLoop]: Abstraction has 1418 states and 3652 transitions. [2021-08-06 14:47:39,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 3652 transitions. [2021-08-06 14:47:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:39,598 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:39,598 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] [2021-08-06 14:47:39,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-06 14:47:39,599 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:39,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1966189090, now seen corresponding path program 18 times [2021-08-06 14:47:39,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:39,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110958015] [2021-08-06 14:47:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:39,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:39,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:39,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110958015] [2021-08-06 14:47:39,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110958015] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:39,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:39,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 14:47:39,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565818093] [2021-08-06 14:47:39,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:47:39,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:39,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:47:39,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:47:39,657 INFO L87 Difference]: Start difference. First operand 1418 states and 3652 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:39,775 INFO L93 Difference]: Finished difference Result 1974 states and 4941 transitions. [2021-08-06 14:47:39,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:47:39,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:39,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:39,780 INFO L225 Difference]: With dead ends: 1974 [2021-08-06 14:47:39,780 INFO L226 Difference]: Without dead ends: 1914 [2021-08-06 14:47:39,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:47:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-08-06 14:47:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 982. [2021-08-06 14:47:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.509683995922528) internal successors, (2462), 981 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2462 transitions. [2021-08-06 14:47:39,807 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2462 transitions. Word has length 32 [2021-08-06 14:47:39,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:39,807 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 2462 transitions. [2021-08-06 14:47:39,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2462 transitions. [2021-08-06 14:47:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:39,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:39,810 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] [2021-08-06 14:47:39,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-06 14:47:39,810 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1945609602, now seen corresponding path program 19 times [2021-08-06 14:47:39,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:39,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732328612] [2021-08-06 14:47:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:39,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:39,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:39,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732328612] [2021-08-06 14:47:39,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732328612] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:39,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:39,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 14:47:39,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072034094] [2021-08-06 14:47:39,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:47:39,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:39,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:47:39,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:47:39,874 INFO L87 Difference]: Start difference. First operand 982 states and 2462 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:40,004 INFO L93 Difference]: Finished difference Result 502 states and 1050 transitions. [2021-08-06 14:47:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:47:40,005 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:40,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:40,005 INFO L225 Difference]: With dead ends: 502 [2021-08-06 14:47:40,005 INFO L226 Difference]: Without dead ends: 234 [2021-08-06 14:47:40,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:47:40,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-06 14:47:40,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 162. [2021-08-06 14:47:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1677018633540373) internal successors, (349), 161 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:40,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 349 transitions. [2021-08-06 14:47:40,009 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 349 transitions. Word has length 32 [2021-08-06 14:47:40,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:40,009 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 349 transitions. [2021-08-06 14:47:40,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:40,010 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 349 transitions. [2021-08-06 14:47:40,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:47:40,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:40,010 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] [2021-08-06 14:47:40,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-06 14:47:40,011 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:40,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1091032676, now seen corresponding path program 20 times [2021-08-06 14:47:40,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:40,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914260655] [2021-08-06 14:47:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:40,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:40,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:40,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914260655] [2021-08-06 14:47:40,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914260655] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:40,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:40,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:47:40,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462827269] [2021-08-06 14:47:40,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:47:40,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:40,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:47:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:47:40,073 INFO L87 Difference]: Start difference. First operand 162 states and 349 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:40,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:40,192 INFO L93 Difference]: Finished difference Result 105 states and 189 transitions. [2021-08-06 14:47:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:47:40,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:47:40,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:40,192 INFO L225 Difference]: With dead ends: 105 [2021-08-06 14:47:40,192 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 14:47:40,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:47:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 14:47:40,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 14:47:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 14:47:40,193 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-08-06 14:47:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:40,193 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 14:47:40,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 14:47:40,194 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 14:47:40,196 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 14:47:40,197 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 14:47:40,199 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 14:47:40,200 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 14:47:40,200 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-06 14:47:40,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-06 14:47:40,214 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 14:47:40,215 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 14:47:40,216 INFO L202 PluginConnector]: Adding new model ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 02:47:40 BasicIcfg [2021-08-06 14:47:40,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 14:47:40,217 INFO L168 Benchmark]: Toolchain (without parser) took 7661.15 ms. Allocated memory was 181.4 MB in the beginning and 596.6 MB in the end (delta: 415.2 MB). Free memory was 161.7 MB in the beginning and 344.8 MB in the end (delta: -183.1 MB). Peak memory consumption was 233.2 MB. Max. memory is 8.0 GB. [2021-08-06 14:47:40,217 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 181.4 MB. Free memory is still 162.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 14:47:40,217 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.02 ms. Allocated memory is still 181.4 MB. Free memory was 161.5 MB in the beginning and 160.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 14:47:40,217 INFO L168 Benchmark]: Boogie Preprocessor took 21.45 ms. Allocated memory is still 181.4 MB. Free memory was 160.0 MB in the beginning and 159.1 MB in the end (delta: 911.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 14:47:40,217 INFO L168 Benchmark]: RCFGBuilder took 256.00 ms. Allocated memory is still 181.4 MB. Free memory was 158.9 MB in the beginning and 145.1 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-06 14:47:40,217 INFO L168 Benchmark]: TraceAbstraction took 7351.79 ms. Allocated memory was 181.4 MB in the beginning and 596.6 MB in the end (delta: 415.2 MB). Free memory was 144.5 MB in the beginning and 344.8 MB in the end (delta: -200.3 MB). Peak memory consumption was 215.3 MB. Max. memory is 8.0 GB. [2021-08-06 14:47:40,218 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 181.4 MB. Free memory is still 162.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.02 ms. Allocated memory is still 181.4 MB. Free memory was 161.5 MB in the beginning and 160.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.45 ms. Allocated memory is still 181.4 MB. Free memory was 160.0 MB in the beginning and 159.1 MB in the end (delta: 911.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 256.00 ms. Allocated memory is still 181.4 MB. Free memory was 158.9 MB in the beginning and 145.1 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7351.79 ms. Allocated memory was 181.4 MB in the beginning and 596.6 MB in the end (delta: 415.2 MB). Free memory was 144.5 MB in the beginning and 344.8 MB in the end (delta: -200.3 MB). Peak memory consumption was 215.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 80]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 68 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 7221.7ms, OverallIterations: 20, TraceHistogramMax: 1, EmptinessCheckTime: 161.7ms, AutomataDifference: 3746.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 163.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1037 SDtfs, 1535 SDslu, 3231 SDs, 0 SdLazy, 3288 SolverSat, 578 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1892.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 210 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 896.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2547occurred in iteration=7, InterpolantAutomatonStates: 171, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1239.3ms AutomataMinimizationTime, 20 MinimizatonAttempts, 22320 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 44.9ms SsaConstructionTime, 158.7ms SatisfiabilityAnalysisTime, 1468.2ms InterpolantComputationTime, 640 NumberOfCodeBlocks, 640 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 620 ConstructedInterpolants, 0 QuantifiedInterpolants, 1856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-06 14:47:40,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...