/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-serverassert08.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:38:55,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:38:55,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:38:55,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 13:38:55,585 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 13:38:55,621 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:38:55,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:38:55,621 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:38:55,621 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:38:55,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:38:55,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:38:55,623 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:38:55,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:38:55,623 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:38:55,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:38:55,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:38:55,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:38:55,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:38:55,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:38:55,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:38:55,624 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:38:55,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:38:55,625 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:38:55,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:38:55,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:38:55,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:38:55,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:38:55,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:38:55,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:38:55,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:38:55,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:38:55,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:38:55,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:38:55,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:38:55,627 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:38:55,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:38:55,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:38:55,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:38:55,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:38:55,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:38:55,936 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:38:55,937 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:38:55,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert08.bpl [2021-08-21 13:38:55,939 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert08.bpl' [2021-08-21 13:38:55,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:38:55,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:38:55,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:38:55,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:38:55,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:38:55,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:55,981 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:55,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:38:55,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:38:55,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:38:55,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:38:56,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:56,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:56,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:56,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:56,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:56,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:56,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:56,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:38:56,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:38:56,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:38:56,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:38:56,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/1) ... [2021-08-21 13:38:56,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:38:56,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:38:56,042 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 13:38:56,051 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 13:38:56,085 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-08-21 13:38:56,086 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-08-21 13:38:56,086 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-08-21 13:38:56,086 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-08-21 13:38:56,086 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-08-21 13:38:56,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-08-21 13:38:56,086 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:38:56,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:38:56,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:38:56,087 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 13:38:56,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:38:56,361 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-21 13:38:56,362 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-08-21 13:38:56,363 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:38:56 BoogieIcfgContainer [2021-08-21 13:38:56,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:38:56,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:38:56,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:38:56,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:38:56,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:55" (1/2) ... [2021-08-21 13:38:56,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691a6ec4 and model type bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:38:56, skipping insertion in model container [2021-08-21 13:38:56,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:38:56" (2/2) ... [2021-08-21 13:38:56,371 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-serverassert08.bpl [2021-08-21 13:38:56,380 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:38:56,381 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:38:56,381 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:38:56,381 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:38:56,468 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-21 13:38:56,521 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:38:56,529 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 13:38:56,530 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-08-21 13:38:56,545 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 74 places, 54 transitions, 153 flow [2021-08-21 13:39:03,780 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 104977 states, 104975 states have (on average 9.05220290545368) internal successors, (950255), 104976 states have internal predecessors, (950255), 0 states have call successors, (0), 0 states 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 13:39:04,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 104977 states, 104975 states have (on average 9.05220290545368) internal successors, (950255), 104976 states have internal predecessors, (950255), 0 states have call successors, (0), 0 states 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 13:39:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 13:39:04,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:04,084 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:04,085 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 13:39:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:04,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1493695156, now seen corresponding path program 1 times [2021-08-21 13:39:04,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:04,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775954217] [2021-08-21 13:39:04,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:04,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:04,253 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 13:39:04,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:04,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775954217] [2021-08-21 13:39:04,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775954217] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:39:04,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:39:04,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:39:04,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417197045] [2021-08-21 13:39:04,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:39:04,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:04,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:39:04,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:39:04,685 INFO L87 Difference]: Start difference. First operand has 104977 states, 104975 states have (on average 9.05220290545368) internal successors, (950255), 104976 states have internal predecessors, (950255), 0 states have call successors, (0), 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 13:39:12,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:12,241 INFO L93 Difference]: Finished difference Result 226323 states and 2052907 transitions. [2021-08-21 13:39:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:39:12,246 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 13:39:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:17,294 INFO L225 Difference]: With dead ends: 226323 [2021-08-21 13:39:17,294 INFO L226 Difference]: Without dead ends: 213195 [2021-08-21 13:39:17,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:39:18,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213195 states. [2021-08-21 13:39:34,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213195 to 180411. [2021-08-21 13:39:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180411 states, 180410 states have (on average 9.11850784324594) internal successors, (1645070), 180410 states have internal predecessors, (1645070), 0 states have call successors, (0), 0 states 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 13:39:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180411 states to 180411 states and 1645070 transitions. [2021-08-21 13:39:39,799 INFO L78 Accepts]: Start accepts. Automaton has 180411 states and 1645070 transitions. Word has length 10 [2021-08-21 13:39:39,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:39,800 INFO L470 AbstractCegarLoop]: Abstraction has 180411 states and 1645070 transitions. [2021-08-21 13:39:39,801 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 13:39:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 180411 states and 1645070 transitions. [2021-08-21 13:39:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 13:39:39,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:39,806 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:39,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:39:39,807 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 13:39:39,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:39,808 INFO L82 PathProgramCache]: Analyzing trace with hash 921976960, now seen corresponding path program 1 times [2021-08-21 13:39:39,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:39,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513354354] [2021-08-21 13:39:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:39,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:39,829 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 13:39:39,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:39,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513354354] [2021-08-21 13:39:39,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513354354] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:39:39,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:39:39,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:39:39,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688901143] [2021-08-21 13:39:39,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:39:39,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:39,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:39:39,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:39:39,833 INFO L87 Difference]: Start difference. First operand 180411 states and 1645070 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 13:39:45,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:45,099 INFO L93 Difference]: Finished difference Result 180411 states and 1266170 transitions. [2021-08-21 13:39:45,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:39:45,100 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 13:39:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:50,258 INFO L225 Difference]: With dead ends: 180411 [2021-08-21 13:39:50,258 INFO L226 Difference]: Without dead ends: 177351 [2021-08-21 13:39:50,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:39:51,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177351 states. [2021-08-21 13:40:03,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177351 to 177351. [2021-08-21 13:40:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177351 states, 177350 states have (on average 7.047454186636594) internal successors, (1249866), 177350 states have internal predecessors, (1249866), 0 states have call successors, (0), 0 states 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 13:40:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177351 states to 177351 states and 1249866 transitions. [2021-08-21 13:40:08,128 INFO L78 Accepts]: Start accepts. Automaton has 177351 states and 1249866 transitions. Word has length 12 [2021-08-21 13:40:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:08,128 INFO L470 AbstractCegarLoop]: Abstraction has 177351 states and 1249866 transitions. [2021-08-21 13:40:08,129 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 13:40:08,129 INFO L276 IsEmpty]: Start isEmpty. Operand 177351 states and 1249866 transitions. [2021-08-21 13:40:08,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 13:40:08,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:08,153 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:40:08,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:40:08,154 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 13:40:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:08,156 INFO L82 PathProgramCache]: Analyzing trace with hash 308282889, now seen corresponding path program 1 times [2021-08-21 13:40:08,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:08,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473134880] [2021-08-21 13:40:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:08,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:08,340 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 13:40:08,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:08,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473134880] [2021-08-21 13:40:08,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473134880] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:40:08,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:40:08,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 13:40:08,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643524375] [2021-08-21 13:40:08,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:40:08,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:08,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:40:08,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:40:08,343 INFO L87 Difference]: Start difference. First operand 177351 states and 1249866 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 13:40:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:19,634 INFO L93 Difference]: Finished difference Result 307536 states and 2218936 transitions. [2021-08-21 13:40:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:40:19,634 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 13:40:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:28,322 INFO L225 Difference]: With dead ends: 307536 [2021-08-21 13:40:28,322 INFO L226 Difference]: Without dead ends: 293136 [2021-08-21 13:40:28,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:40:30,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293136 states.