/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/POPL2022/bluetooth-serverassert07.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:38:55,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:38:55,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:38:55,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 13:38:55,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 13:38:55,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:38:55,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:38:55,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:38:55,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:38:55,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:38:55,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:38:55,306 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:38:55,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:38:55,306 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:38:55,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:38:55,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:38:55,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:38:55,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:38:55,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:38:55,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:38:55,308 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:38:55,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:38:55,308 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:38:55,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:38:55,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:38:55,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:38:55,309 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:38:55,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:38:55,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:38:55,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:38:55,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:38:55,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:38:55,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:38:55,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:38:55,310 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:38:55,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:38:55,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:38:55,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:38:55,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:38:55,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:38:55,601 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:38:55,603 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:38:55,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert07.bpl [2021-08-21 13:38:55,604 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert07.bpl' [2021-08-21 13:38:55,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:38:55,630 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:38:55,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:38:55,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:38:55,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:38:55,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:55,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:55,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:38:55,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:38:55,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:38:55,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:38:55,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:55,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:55,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:55,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:55,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:55,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:55,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:55,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:38:55,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:38:55,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:38:55,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:38:55,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:55,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:38:55,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:38:55,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 13:38:55,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 13:38:55,749 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-08-21 13:38:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-08-21 13:38:55,750 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-08-21 13:38:55,750 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-08-21 13:38:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-08-21 13:38:55,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-08-21 13:38:55,750 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:38:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:38:55,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:38:55,751 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 13:38:55,908 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:38:55,908 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-21 13:38:55,909 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-08-21 13:38:55,910 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:38:55 BoogieIcfgContainer [2021-08-21 13:38:55,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:38:55,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:38:55,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:38:55,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:38:55,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/2) ... [2021-08-21 13:38:55,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b5de47 and model type bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:38:55, skipping insertion in model container [2021-08-21 13:38:55,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:38:55" (2/2) ... [2021-08-21 13:38:55,915 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-serverassert07.bpl [2021-08-21 13:38:55,919 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:38:55,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:38:55,919 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:38:55,919 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:38:55,951 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-21 13:38:55,995 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:38:55,999 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 13:38:56,000 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-08-21 13:38:56,007 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 49 transitions, 138 flow [2021-08-21 13:38:58,124 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34993 states, 34991 states have (on average 8.052413477751422) internal successors, (281762), 34992 states have internal predecessors, (281762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:38:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 34993 states, 34991 states have (on average 8.052413477751422) internal successors, (281762), 34992 states have internal predecessors, (281762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:38:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 13:38:58,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:38:58,254 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:38:58,255 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:38:58,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:38:58,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1841629554, now seen corresponding path program 1 times [2021-08-21 13:38:58,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:38:58,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287409602] [2021-08-21 13:38:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:38:58,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:38:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:38:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:38:58,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:38:58,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287409602] [2021-08-21 13:38:58,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287409602] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:38:58,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:38:58,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:38:58,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533572045] [2021-08-21 13:38:58,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:38:58,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:38:58,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:38:58,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:38:58,573 INFO L87 Difference]: Start difference. First operand has 34993 states, 34991 states have (on average 8.052413477751422) internal successors, (281762), 34992 states have internal predecessors, (281762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:00,429 INFO L93 Difference]: Finished difference Result 75422 states and 608780 transitions. [2021-08-21 13:39:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:39:00,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-21 13:39:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:01,538 INFO L225 Difference]: With dead ends: 75422 [2021-08-21 13:39:01,538 INFO L226 Difference]: Without dead ends: 71042 [2021-08-21 13:39:01,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:39:01,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71042 states. [2021-08-21 13:39:05,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71042 to 60126. [2021-08-21 13:39:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60126 states, 60125 states have (on average 8.119035343035343) internal successors, (488157), 60125 states have internal predecessors, (488157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60126 states to 60126 states and 488157 transitions. [2021-08-21 13:39:06,543 INFO L78 Accepts]: Start accepts. Automaton has 60126 states and 488157 transitions. Word has length 10 [2021-08-21 13:39:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:06,544 INFO L470 AbstractCegarLoop]: Abstraction has 60126 states and 488157 transitions. [2021-08-21 13:39:06,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 60126 states and 488157 transitions. [2021-08-21 13:39:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 13:39:06,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:06,549 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:06,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:39:06,550 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:39:06,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:06,551 INFO L82 PathProgramCache]: Analyzing trace with hash -23953666, now seen corresponding path program 1 times [2021-08-21 13:39:06,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:06,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781440777] [2021-08-21 13:39:06,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:06,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:39:06,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:06,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781440777] [2021-08-21 13:39:06,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781440777] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:39:06,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:39:06,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:39:06,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36784624] [2021-08-21 13:39:06,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:39:06,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:06,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:39:06,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:39:06,570 INFO L87 Difference]: Start difference. First operand 60126 states and 488157 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:07,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:07,601 INFO L93 Difference]: Finished difference Result 60126 states and 378258 transitions. [2021-08-21 13:39:07,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:39:07,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 13:39:07,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:08,469 INFO L225 Difference]: With dead ends: 60126 [2021-08-21 13:39:08,469 INFO L226 Difference]: Without dead ends: 58602 [2021-08-21 13:39:08,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:39:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58602 states. [2021-08-21 13:39:10,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58602 to 58602. [2021-08-21 13:39:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58602 states, 58601 states have (on average 6.32934591559871) internal successors, (370906), 58601 states have internal predecessors, (370906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58602 states to 58602 states and 370906 transitions. [2021-08-21 13:39:11,811 INFO L78 Accepts]: Start accepts. Automaton has 58602 states and 370906 transitions. Word has length 12 [2021-08-21 13:39:11,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:11,811 INFO L470 AbstractCegarLoop]: Abstraction has 58602 states and 370906 transitions. [2021-08-21 13:39:11,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:11,812 INFO L276 IsEmpty]: Start isEmpty. Operand 58602 states and 370906 transitions. [2021-08-21 13:39:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 13:39:11,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:11,820 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:11,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:39:11,820 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:39:11,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:11,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1718235274, now seen corresponding path program 1 times [2021-08-21 13:39:11,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:11,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257866214] [2021-08-21 13:39:11,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:11,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:39:11,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:11,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257866214] [2021-08-21 13:39:11,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257866214] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:39:11,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:39:11,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 13:39:11,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077245801] [2021-08-21 13:39:11,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:39:11,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:39:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:39:11,933 INFO L87 Difference]: Start difference. First operand 58602 states and 370906 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:13,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:13,662 INFO L93 Difference]: Finished difference Result 101734 states and 657894 transitions. [2021-08-21 13:39:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:39:13,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 13:39:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:14,766 INFO L225 Difference]: With dead ends: 101734 [2021-08-21 13:39:14,767 INFO L226 Difference]: Without dead ends: 95278 [2021-08-21 13:39:14,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:39:14,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95278 states. [2021-08-21 13:39:17,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95278 to 71333. [2021-08-21 13:39:17,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71333 states, 71332 states have (on average 6.407601076655639) internal successors, (457067), 71332 states have internal predecessors, (457067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71333 states to 71333 states and 457067 transitions. [2021-08-21 13:39:18,648 INFO L78 Accepts]: Start accepts. Automaton has 71333 states and 457067 transitions. Word has length 13 [2021-08-21 13:39:18,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:18,648 INFO L470 AbstractCegarLoop]: Abstraction has 71333 states and 457067 transitions. [2021-08-21 13:39:18,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:18,649 INFO L276 IsEmpty]: Start isEmpty. Operand 71333 states and 457067 transitions. [2021-08-21 13:39:18,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 13:39:18,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:18,676 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:18,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 13:39:18,676 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:39:18,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:18,677 INFO L82 PathProgramCache]: Analyzing trace with hash -246494976, now seen corresponding path program 1 times [2021-08-21 13:39:18,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:18,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296337352] [2021-08-21 13:39:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:18,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:39:19,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:19,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296337352] [2021-08-21 13:39:19,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296337352] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:39:19,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:39:19,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:39:19,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226569137] [2021-08-21 13:39:19,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:39:19,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:19,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:39:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:39:19,139 INFO L87 Difference]: Start difference. First operand 71333 states and 457067 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:20,956 INFO L93 Difference]: Finished difference Result 91025 states and 573010 transitions. [2021-08-21 13:39:20,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 13:39:20,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 13:39:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:22,027 INFO L225 Difference]: With dead ends: 91025 [2021-08-21 13:39:22,028 INFO L226 Difference]: Without dead ends: 81249 [2021-08-21 13:39:22,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:39:22,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81249 states. [2021-08-21 13:39:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81249 to 77967. [2021-08-21 13:39:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77967 states, 77966 states have (on average 6.399815304106919) internal successors, (498968), 77966 states have internal predecessors, (498968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77967 states to 77967 states and 498968 transitions. [2021-08-21 13:39:26,118 INFO L78 Accepts]: Start accepts. Automaton has 77967 states and 498968 transitions. Word has length 16 [2021-08-21 13:39:26,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:26,119 INFO L470 AbstractCegarLoop]: Abstraction has 77967 states and 498968 transitions. [2021-08-21 13:39:26,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 77967 states and 498968 transitions. [2021-08-21 13:39:26,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 13:39:26,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:26,145 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:26,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 13:39:26,145 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:39:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:26,146 INFO L82 PathProgramCache]: Analyzing trace with hash 718602923, now seen corresponding path program 2 times [2021-08-21 13:39:26,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:26,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352884422] [2021-08-21 13:39:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:26,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:39:26,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:26,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352884422] [2021-08-21 13:39:26,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352884422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:26,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106680208] [2021-08-21 13:39:26,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:39:26,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:39:26,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:39:26,217 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:39:26,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 13:39:26,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:39:26,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:39:26,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 13:39:26,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:39:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:39:26,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106680208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:26,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:39:26,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 13:39:26,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925552418] [2021-08-21 13:39:26,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:39:26,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:26,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:39:26,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:39:26,503 INFO L87 Difference]: Start difference. First operand 77967 states and 498968 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:28,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:28,576 INFO L93 Difference]: Finished difference Result 117712 states and 771755 transitions. [2021-08-21 13:39:28,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:39:28,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 13:39:28,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:29,907 INFO L225 Difference]: With dead ends: 117712 [2021-08-21 13:39:29,908 INFO L226 Difference]: Without dead ends: 111395 [2021-08-21 13:39:29,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:39:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111395 states. [2021-08-21 13:39:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111395 to 78948. [2021-08-21 13:39:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78948 states, 78947 states have (on average 6.470543529203137) internal successors, (510830), 78947 states have internal predecessors, (510830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:34,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78948 states to 78948 states and 510830 transitions. [2021-08-21 13:39:34,896 INFO L78 Accepts]: Start accepts. Automaton has 78948 states and 510830 transitions. Word has length 17 [2021-08-21 13:39:34,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:34,897 INFO L470 AbstractCegarLoop]: Abstraction has 78948 states and 510830 transitions. [2021-08-21 13:39:34,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:34,897 INFO L276 IsEmpty]: Start isEmpty. Operand 78948 states and 510830 transitions. [2021-08-21 13:39:34,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 13:39:34,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:34,952 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:34,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 13:39:35,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:39:35,154 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:39:35,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:35,154 INFO L82 PathProgramCache]: Analyzing trace with hash 324340494, now seen corresponding path program 1 times [2021-08-21 13:39:35,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:35,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581781924] [2021-08-21 13:39:35,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:35,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:39:35,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:35,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581781924] [2021-08-21 13:39:35,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581781924] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:39:35,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:39:35,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 13:39:35,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157006000] [2021-08-21 13:39:35,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:39:35,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:35,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:39:35,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:39:35,244 INFO L87 Difference]: Start difference. First operand 78948 states and 510830 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:37,237 INFO L93 Difference]: Finished difference Result 106452 states and 678978 transitions. [2021-08-21 13:39:37,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:39:37,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 13:39:37,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:38,399 INFO L225 Difference]: With dead ends: 106452 [2021-08-21 13:39:38,399 INFO L226 Difference]: Without dead ends: 94052 [2021-08-21 13:39:38,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:39:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94052 states. [2021-08-21 13:39:42,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94052 to 89468. [2021-08-21 13:39:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89468 states, 89467 states have (on average 6.490068963975544) internal successors, (580647), 89467 states have internal predecessors, (580647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89468 states to 89468 states and 580647 transitions. [2021-08-21 13:39:43,471 INFO L78 Accepts]: Start accepts. Automaton has 89468 states and 580647 transitions. Word has length 19 [2021-08-21 13:39:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:43,471 INFO L470 AbstractCegarLoop]: Abstraction has 89468 states and 580647 transitions. [2021-08-21 13:39:43,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 89468 states and 580647 transitions. [2021-08-21 13:39:43,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:39:43,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:43,536 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:43,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 13:39:43,536 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:39:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1234633309, now seen corresponding path program 2 times [2021-08-21 13:39:43,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:43,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381246767] [2021-08-21 13:39:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:43,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:39:43,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:43,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381246767] [2021-08-21 13:39:43,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381246767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:43,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733587219] [2021-08-21 13:39:43,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:39:43,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:39:43,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:39:43,635 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:39:43,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 13:39:43,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:39:43,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:39:43,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 13:39:43,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:39:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:39:43,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733587219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:43,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:39:43,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 13:39:43,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015227713] [2021-08-21 13:39:43,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:39:43,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:43,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:39:43,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:39:43,802 INFO L87 Difference]: Start difference. First operand 89468 states and 580647 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:46,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:46,747 INFO L93 Difference]: Finished difference Result 125794 states and 829776 transitions. [2021-08-21 13:39:46,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 13:39:46,747 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:39:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:48,673 INFO L225 Difference]: With dead ends: 125794 [2021-08-21 13:39:48,673 INFO L226 Difference]: Without dead ends: 115236 [2021-08-21 13:39:48,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:39:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115236 states. [2021-08-21 13:39:52,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115236 to 80283. [2021-08-21 13:39:52,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80283 states, 80282 states have (on average 6.49860491766523) internal successors, (521721), 80282 states have internal predecessors, (521721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80283 states to 80283 states and 521721 transitions. [2021-08-21 13:39:53,844 INFO L78 Accepts]: Start accepts. Automaton has 80283 states and 521721 transitions. Word has length 20 [2021-08-21 13:39:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:53,844 INFO L470 AbstractCegarLoop]: Abstraction has 80283 states and 521721 transitions. [2021-08-21 13:39:53,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 80283 states and 521721 transitions. [2021-08-21 13:39:53,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:39:53,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:53,962 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:53,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 13:39:54,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-21 13:39:54,165 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:39:54,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:54,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1290155314, now seen corresponding path program 1 times [2021-08-21 13:39:54,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:54,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522983661] [2021-08-21 13:39:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:54,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:39:54,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:54,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522983661] [2021-08-21 13:39:54,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522983661] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:39:54,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:39:54,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 13:39:54,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905546905] [2021-08-21 13:39:54,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:39:54,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:54,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:39:54,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:39:54,275 INFO L87 Difference]: Start difference. First operand 80283 states and 521721 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:56,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:56,215 INFO L93 Difference]: Finished difference Result 111087 states and 714322 transitions. [2021-08-21 13:39:56,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:39:56,216 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:39:56,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:57,430 INFO L225 Difference]: With dead ends: 111087 [2021-08-21 13:39:57,430 INFO L226 Difference]: Without dead ends: 97519 [2021-08-21 13:39:57,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:39:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97519 states. [2021-08-21 13:40:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97519 to 92385. [2021-08-21 13:40:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92385 states, 92384 states have (on average 6.539032732940769) internal successors, (604102), 92384 states have internal predecessors, (604102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92385 states to 92385 states and 604102 transitions. [2021-08-21 13:40:02,684 INFO L78 Accepts]: Start accepts. Automaton has 92385 states and 604102 transitions. Word has length 22 [2021-08-21 13:40:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:02,687 INFO L470 AbstractCegarLoop]: Abstraction has 92385 states and 604102 transitions. [2021-08-21 13:40:02,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 92385 states and 604102 transitions. [2021-08-21 13:40:02,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 13:40:02,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:02,895 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:40:02,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 13:40:02,895 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:40:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:02,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1741871389, now seen corresponding path program 2 times [2021-08-21 13:40:02,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:02,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118497946] [2021-08-21 13:40:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:02,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:03,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:03,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118497946] [2021-08-21 13:40:03,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118497946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:03,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696830249] [2021-08-21 13:40:03,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:40:03,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:03,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:40:03,081 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:40:03,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 13:40:03,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:40:03,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:40:03,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 13:40:03,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:40:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:03,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696830249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:03,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:40:03,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 13:40:03,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762004928] [2021-08-21 13:40:03,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:40:03,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:03,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:40:03,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:40:03,747 INFO L87 Difference]: Start difference. First operand 92385 states and 604102 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:06,216 INFO L93 Difference]: Finished difference Result 120516 states and 795706 transitions. [2021-08-21 13:40:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:40:06,216 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 13:40:06,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:07,696 INFO L225 Difference]: With dead ends: 120516 [2021-08-21 13:40:07,696 INFO L226 Difference]: Without dead ends: 105484 [2021-08-21 13:40:07,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:40:07,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105484 states. [2021-08-21 13:40:11,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105484 to 74510. [2021-08-21 13:40:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74510 states, 74509 states have (on average 6.489095277080621) internal successors, (483496), 74509 states have internal predecessors, (483496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:12,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74510 states to 74510 states and 483496 transitions. [2021-08-21 13:40:12,728 INFO L78 Accepts]: Start accepts. Automaton has 74510 states and 483496 transitions. Word has length 23 [2021-08-21 13:40:12,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:12,729 INFO L470 AbstractCegarLoop]: Abstraction has 74510 states and 483496 transitions. [2021-08-21 13:40:12,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:12,736 INFO L276 IsEmpty]: Start isEmpty. Operand 74510 states and 483496 transitions. [2021-08-21 13:40:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 13:40:12,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:12,979 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:40:13,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 13:40:13,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:13,180 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:40:13,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:13,181 INFO L82 PathProgramCache]: Analyzing trace with hash -374931050, now seen corresponding path program 1 times [2021-08-21 13:40:13,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:13,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937662627] [2021-08-21 13:40:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:13,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:13,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:13,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937662627] [2021-08-21 13:40:13,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937662627] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:40:13,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:40:13,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 13:40:13,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273902156] [2021-08-21 13:40:13,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:40:13,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:13,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:40:13,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:40:13,356 INFO L87 Difference]: Start difference. First operand 74510 states and 483496 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:15,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:15,954 INFO L93 Difference]: Finished difference Result 104942 states and 676310 transitions. [2021-08-21 13:40:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 13:40:15,955 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 13:40:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:17,554 INFO L225 Difference]: With dead ends: 104942 [2021-08-21 13:40:17,555 INFO L226 Difference]: Without dead ends: 91270 [2021-08-21 13:40:17,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:40:17,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91270 states. [2021-08-21 13:40:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91270 to 86198. [2021-08-21 13:40:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86198 states, 86197 states have (on average 6.549566690256041) internal successors, (564553), 86197 states have internal predecessors, (564553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86198 states to 86198 states and 564553 transitions. [2021-08-21 13:40:22,821 INFO L78 Accepts]: Start accepts. Automaton has 86198 states and 564553 transitions. Word has length 25 [2021-08-21 13:40:22,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:22,822 INFO L470 AbstractCegarLoop]: Abstraction has 86198 states and 564553 transitions. [2021-08-21 13:40:22,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:22,822 INFO L276 IsEmpty]: Start isEmpty. Operand 86198 states and 564553 transitions. [2021-08-21 13:40:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:40:22,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:22,994 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:40:22,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 13:40:22,994 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:40:22,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:22,994 INFO L82 PathProgramCache]: Analyzing trace with hash 860277019, now seen corresponding path program 2 times [2021-08-21 13:40:22,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:22,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440111748] [2021-08-21 13:40:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:22,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:23,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:23,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440111748] [2021-08-21 13:40:23,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440111748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:23,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505880613] [2021-08-21 13:40:23,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:40:23,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:23,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:40:23,103 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:40:23,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 13:40:23,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:40:23,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:40:23,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:40:23,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:40:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:23,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505880613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:23,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:40:23,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 13:40:23,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634738254] [2021-08-21 13:40:23,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:40:23,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:23,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:40:23,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:40:23,340 INFO L87 Difference]: Start difference. First operand 86198 states and 564553 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:25,640 INFO L93 Difference]: Finished difference Result 101926 states and 671613 transitions. [2021-08-21 13:40:25,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:40:25,641 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:40:25,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:26,409 INFO L225 Difference]: With dead ends: 101926 [2021-08-21 13:40:26,409 INFO L226 Difference]: Without dead ends: 83020 [2021-08-21 13:40:26,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:40:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83020 states. [2021-08-21 13:40:29,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83020 to 61065. [2021-08-21 13:40:29,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61065 states, 61064 states have (on average 6.462842263854316) internal successors, (394647), 61064 states have internal predecessors, (394647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61065 states to 61065 states and 394647 transitions. [2021-08-21 13:40:30,218 INFO L78 Accepts]: Start accepts. Automaton has 61065 states and 394647 transitions. Word has length 26 [2021-08-21 13:40:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:30,218 INFO L470 AbstractCegarLoop]: Abstraction has 61065 states and 394647 transitions. [2021-08-21 13:40:30,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 61065 states and 394647 transitions. [2021-08-21 13:40:30,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:40:30,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:30,334 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:40:30,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 13:40:30,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:30,537 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:40:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:30,538 INFO L82 PathProgramCache]: Analyzing trace with hash -735505082, now seen corresponding path program 1 times [2021-08-21 13:40:30,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:30,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105639317] [2021-08-21 13:40:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:30,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:30,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:30,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105639317] [2021-08-21 13:40:30,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105639317] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:40:30,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:40:30,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 13:40:30,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102277020] [2021-08-21 13:40:30,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:40:30,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:30,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:40:30,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:40:30,660 INFO L87 Difference]: Start difference. First operand 61065 states and 394647 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:32,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:32,663 INFO L93 Difference]: Finished difference Result 87297 states and 561897 transitions. [2021-08-21 13:40:32,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:40:32,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:40:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:33,883 INFO L225 Difference]: With dead ends: 87297 [2021-08-21 13:40:33,883 INFO L226 Difference]: Without dead ends: 74277 [2021-08-21 13:40:33,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:40:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74277 states. [2021-08-21 13:40:36,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74277 to 69905. [2021-08-21 13:40:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69905 states, 69904 states have (on average 6.5392252231631955) internal successors, (457118), 69904 states have internal predecessors, (457118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:37,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69905 states to 69905 states and 457118 transitions. [2021-08-21 13:40:37,915 INFO L78 Accepts]: Start accepts. Automaton has 69905 states and 457118 transitions. Word has length 28 [2021-08-21 13:40:37,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:37,916 INFO L470 AbstractCegarLoop]: Abstraction has 69905 states and 457118 transitions. [2021-08-21 13:40:37,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:37,916 INFO L276 IsEmpty]: Start isEmpty. Operand 69905 states and 457118 transitions. [2021-08-21 13:40:38,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:40:38,049 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:38,049 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:40:38,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 13:40:38,050 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:40:38,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:38,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1899358287, now seen corresponding path program 2 times [2021-08-21 13:40:38,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:38,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323448940] [2021-08-21 13:40:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:38,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:38,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:38,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323448940] [2021-08-21 13:40:38,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323448940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:38,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237312945] [2021-08-21 13:40:38,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:40:38,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:38,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:40:38,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:40:38,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 13:40:38,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:40:38,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:40:38,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:40:38,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:40:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:38,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237312945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:38,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:40:38,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 13:40:38,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610839828] [2021-08-21 13:40:38,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:40:38,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:38,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:40:38,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:40:38,442 INFO L87 Difference]: Start difference. First operand 69905 states and 457118 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:40,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:40,023 INFO L93 Difference]: Finished difference Result 71584 states and 470863 transitions. [2021-08-21 13:40:40,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 13:40:40,024 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:40:40,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:40,440 INFO L225 Difference]: With dead ends: 71584 [2021-08-21 13:40:40,441 INFO L226 Difference]: Without dead ends: 51572 [2021-08-21 13:40:40,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:40:40,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51572 states. [2021-08-21 13:40:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51572 to 40776. [2021-08-21 13:40:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40776 states, 40775 states have (on average 6.4371796443899445) internal successors, (262476), 40775 states have internal predecessors, (262476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:42,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40776 states to 40776 states and 262476 transitions. [2021-08-21 13:40:42,949 INFO L78 Accepts]: Start accepts. Automaton has 40776 states and 262476 transitions. Word has length 29 [2021-08-21 13:40:42,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:42,949 INFO L470 AbstractCegarLoop]: Abstraction has 40776 states and 262476 transitions. [2021-08-21 13:40:42,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:42,949 INFO L276 IsEmpty]: Start isEmpty. Operand 40776 states and 262476 transitions. [2021-08-21 13:40:43,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 13:40:43,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:43,017 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] [2021-08-21 13:40:43,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 13:40:43,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 13:40:43,218 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:40:43,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:43,219 INFO L82 PathProgramCache]: Analyzing trace with hash 823218556, now seen corresponding path program 1 times [2021-08-21 13:40:43,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:43,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855539290] [2021-08-21 13:40:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:43,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:43,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:43,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855539290] [2021-08-21 13:40:43,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855539290] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:40:43,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:40:43,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-21 13:40:43,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946604487] [2021-08-21 13:40:43,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:40:43,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:43,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:40:43,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:40:43,350 INFO L87 Difference]: Start difference. First operand 40776 states and 262476 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:44,610 INFO L93 Difference]: Finished difference Result 40776 states and 262220 transitions. [2021-08-21 13:40:44,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:40:44,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 13:40:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:44,797 INFO L225 Difference]: With dead ends: 40776 [2021-08-21 13:40:44,797 INFO L226 Difference]: Without dead ends: 29722 [2021-08-21 13:40:44,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:40:44,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29722 states. [2021-08-21 13:40:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29722 to 29722. [2021-08-21 13:40:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29722 states, 29721 states have (on average 6.4687931092493525) internal successors, (192259), 29721 states have internal predecessors, (192259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:46,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29722 states to 29722 states and 192259 transitions. [2021-08-21 13:40:46,273 INFO L78 Accepts]: Start accepts. Automaton has 29722 states and 192259 transitions. Word has length 31 [2021-08-21 13:40:46,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:46,273 INFO L470 AbstractCegarLoop]: Abstraction has 29722 states and 192259 transitions. [2021-08-21 13:40:46,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 29722 states and 192259 transitions. [2021-08-21 13:40:46,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:40:46,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:46,320 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:40:46,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 13:40:46,320 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:40:46,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:46,321 INFO L82 PathProgramCache]: Analyzing trace with hash -823565765, now seen corresponding path program 2 times [2021-08-21 13:40:46,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:46,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555466201] [2021-08-21 13:40:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:46,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:46,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:46,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555466201] [2021-08-21 13:40:46,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555466201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:46,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138361208] [2021-08-21 13:40:46,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:40:46,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:46,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:40:46,454 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:40:46,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 13:40:46,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:40:46,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:40:46,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:40:46,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:40:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:46,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138361208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:46,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:40:46,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 13:40:47,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742591321] [2021-08-21 13:40:47,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:40:47,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:47,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:40:47,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:40:47,000 INFO L87 Difference]: Start difference. First operand 29722 states and 192259 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:47,398 INFO L93 Difference]: Finished difference Result 17112 states and 115948 transitions. [2021-08-21 13:40:47,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:40:47,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 13:40:47,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:47,398 INFO L225 Difference]: With dead ends: 17112 [2021-08-21 13:40:47,398 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 13:40:47,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:40:47,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 13:40:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 13:40:47,399 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) [2021-08-21 13:40:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 13:40:47,399 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-08-21 13:40:47,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:47,399 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 13:40:47,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 13:40:47,399 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 13:40:47,401 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ServerThreadErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:40:47,402 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 13:40:47,402 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 13:40:47,402 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 13:40:47,402 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 13:40:47,402 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4INUSE_VIOLATION [2021-08-21 13:40:47,402 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5INUSE_VIOLATION [2021-08-21 13:40:47,402 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6INUSE_VIOLATION [2021-08-21 13:40:47,402 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7INUSE_VIOLATION [2021-08-21 13:40:47,402 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ServerThreadErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:40:47,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 13:40:47,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 13:40:47,618 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 13:40:47,619 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 13:40:47,620 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:40:47 BasicIcfg [2021-08-21 13:40:47,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 13:40:47,621 INFO L168 Benchmark]: Toolchain (without parser) took 111990.63 ms. Allocated memory was 184.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 164.2 MB in the beginning and 5.2 GB in the end (delta: -5.0 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. [2021-08-21 13:40:47,621 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 184.5 MB. Free memory was 165.3 MB in the beginning and 165.3 MB in the end (delta: 69.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:40:47,621 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.40 ms. Allocated memory is still 184.5 MB. Free memory was 164.0 MB in the beginning and 162.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:40:47,621 INFO L168 Benchmark]: Boogie Preprocessor took 12.73 ms. Allocated memory is still 184.5 MB. Free memory was 162.3 MB in the beginning and 161.3 MB in the end (delta: 958.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:40:47,622 INFO L168 Benchmark]: RCFGBuilder took 237.67 ms. Allocated memory is still 184.5 MB. Free memory was 161.3 MB in the beginning and 148.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 13:40:47,622 INFO L168 Benchmark]: TraceAbstraction took 111708.50 ms. Allocated memory was 184.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 147.7 MB in the beginning and 5.2 GB in the end (delta: -5.0 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. [2021-08-21 13:40:47,623 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 0.10 ms. Allocated memory is still 184.5 MB. Free memory was 165.3 MB in the beginning and 165.3 MB in the end (delta: 69.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.40 ms. Allocated memory is still 184.5 MB. Free memory was 164.0 MB in the beginning and 162.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.73 ms. Allocated memory is still 184.5 MB. Free memory was 162.3 MB in the beginning and 161.3 MB in the end (delta: 958.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 237.67 ms. Allocated memory is still 184.5 MB. Free memory was 161.3 MB in the beginning and 148.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 111708.50 ms. Allocated memory was 184.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 147.7 MB in the beginning and 5.2 GB in the end (delta: -5.0 GB). Peak memory consumption was 2.8 GB. 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: 76]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 11 procedures, 62 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 111622.8ms, OverallIterations: 15, TraceHistogramMax: 2, EmptinessCheckTime: 1418.7ms, AutomataDifference: 43592.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2129.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1220 SDtfs, 1692 SDslu, 5155 SDs, 0 SdLazy, 6034 SolverSat, 1090 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2896.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 303 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 759.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=92385occurred in iteration=8, InterpolantAutomatonStates: 127, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 58898.6ms AutomataMinimizationTime, 15 MinimizatonAttempts, 188430 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 44.2ms SsaConstructionTime, 176.5ms SatisfiabilityAnalysisTime, 3561.0ms InterpolantComputationTime, 470 NumberOfCodeBlocks, 470 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 449 ConstructedInterpolants, 0 QuantifiedInterpolants, 2512 SizeOfPredicates, 12 NumberOfNonLiveVariables, 330 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 21 InterpolantComputations, 9 PerfectInterpolantSequences, 0/12 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! [2021-08-21 13:40:47,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...