/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-serverassert05.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:38:50,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:38:50,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:38:50,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 13:38:50,262 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 13:38:50,297 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:38:50,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:38:50,298 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:38:50,298 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:38:50,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:38:50,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:38:50,301 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:38:50,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:38:50,302 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:38:50,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:38:50,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:38:50,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:38:50,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:38:50,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:38:50,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:38:50,303 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:38:50,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:38:50,304 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:38:50,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:38:50,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:38:50,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:38:50,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:38:50,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:38:50,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:38:50,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:38:50,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:38:50,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:38:50,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:38:50,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:38:50,306 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:38:50,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:38:50,306 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:38:50,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:38:50,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:38:50,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:38:50,629 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:38:50,631 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:38:50,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert05.bpl [2021-08-21 13:38:50,632 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert05.bpl' [2021-08-21 13:38:50,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:38:50,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:38:50,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:38:50,657 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:38:50,657 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:38:50,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:50" (1/1) ... [2021-08-21 13:38:50,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:50" (1/1) ... [2021-08-21 13:38:50,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:38:50,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:38:50,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:38:50,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:38:50,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:50" (1/1) ... [2021-08-21 13:38:50,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:50" (1/1) ... [2021-08-21 13:38:50,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:50" (1/1) ... [2021-08-21 13:38:50,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:50" (1/1) ... [2021-08-21 13:38:50,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:50" (1/1) ... [2021-08-21 13:38:50,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:50" (1/1) ... [2021-08-21 13:38:50,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:50" (1/1) ... [2021-08-21 13:38:50,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:38:50,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:38:50,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:38:50,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:38:50,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:50" (1/1) ... [2021-08-21 13:38:50,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:38:50,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:38:50,742 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 13:38:50,760 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 13:38:50,774 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-08-21 13:38:50,774 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-08-21 13:38:50,774 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-08-21 13:38:50,775 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-08-21 13:38:50,775 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-08-21 13:38:50,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-08-21 13:38:50,775 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:38:50,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:38:50,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:38:50,776 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 13:38:50,946 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:38:50,946 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-21 13:38:50,947 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-08-21 13:38:50,949 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:38:50 BoogieIcfgContainer [2021-08-21 13:38:50,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:38:50,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:38:50,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:38:50,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:38:50,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:38:50" (1/2) ... [2021-08-21 13:38:50,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eec6c9b and model type bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:38:50, skipping insertion in model container [2021-08-21 13:38:50,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:38:50" (2/2) ... [2021-08-21 13:38:50,955 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-serverassert05.bpl [2021-08-21 13:38:50,960 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:38:50,960 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:38:50,960 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:38:50,960 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:38:50,997 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-21 13:38:51,032 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:38:51,038 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 13:38:51,039 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-08-21 13:38:51,051 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 53 places, 39 transitions, 108 flow [2021-08-21 13:38:51,329 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3889 states, 3887 states have (on average 6.054540776948803) internal successors, (23534), 3888 states have internal predecessors, (23534), 0 states have call successors, (0), 0 states 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 13:38:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand has 3889 states, 3887 states have (on average 6.054540776948803) internal successors, (23534), 3888 states have internal predecessors, (23534), 0 states have call successors, (0), 0 states 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 13:38:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 13:38:51,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:38:51,359 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:38:51,360 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 13:38:51,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:38:51,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1240922043, now seen corresponding path program 1 times [2021-08-21 13:38:51,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:38:51,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583090647] [2021-08-21 13:38:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:38:51,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:38:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:38:51,585 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 13:38:51,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:38:51,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583090647] [2021-08-21 13:38:51,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583090647] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:38:51,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:38:51,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:38:51,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441341871] [2021-08-21 13:38:51,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:38:51,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:38:51,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:38:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:38:51,647 INFO L87 Difference]: Start difference. First operand has 3889 states, 3887 states have (on average 6.054540776948803) internal successors, (23534), 3888 states have internal predecessors, (23534), 0 states have call successors, (0), 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 13:38:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:38:52,065 INFO L93 Difference]: Finished difference Result 8358 states and 50809 transitions. [2021-08-21 13:38:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:38:52,068 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 13:38:52,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:38:52,229 INFO L225 Difference]: With dead ends: 8358 [2021-08-21 13:38:52,229 INFO L226 Difference]: Without dead ends: 7866 [2021-08-21 13:38:52,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:38:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7866 states. [2021-08-21 13:38:52,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7866 to 6666. [2021-08-21 13:38:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6666 states, 6665 states have (on average 6.123630907726931) internal successors, (40814), 6665 states have internal predecessors, (40814), 0 states have call successors, (0), 0 states 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 13:38:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 40814 transitions. [2021-08-21 13:38:52,765 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 40814 transitions. Word has length 10 [2021-08-21 13:38:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:38:52,765 INFO L470 AbstractCegarLoop]: Abstraction has 6666 states and 40814 transitions. [2021-08-21 13:38:52,766 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 13:38:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 40814 transitions. [2021-08-21 13:38:52,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 13:38:52,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:38:52,774 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:38:52,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:38:52,775 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 13:38:52,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:38:52,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1474833393, now seen corresponding path program 1 times [2021-08-21 13:38:52,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:38:52,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137772552] [2021-08-21 13:38:52,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:38:52,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:38:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:38:52,817 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 13:38:52,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:38:52,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137772552] [2021-08-21 13:38:52,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137772552] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:38:52,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:38:52,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:38:52,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865795236] [2021-08-21 13:38:52,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:38:52,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:38:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:38:52,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:38:52,824 INFO L87 Difference]: Start difference. First operand 6666 states and 40814 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 13:38:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:38:53,035 INFO L93 Difference]: Finished difference Result 6666 states and 32246 transitions. [2021-08-21 13:38:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:38:53,036 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 13:38:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:38:53,091 INFO L225 Difference]: With dead ends: 6666 [2021-08-21 13:38:53,091 INFO L226 Difference]: Without dead ends: 6294 [2021-08-21 13:38:53,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:38:53,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2021-08-21 13:38:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 6294. [2021-08-21 13:38:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6294 states, 6293 states have (on average 4.899094231686) internal successors, (30830), 6293 states have internal predecessors, (30830), 0 states have call successors, (0), 0 states 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 13:38:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6294 states to 6294 states and 30830 transitions. [2021-08-21 13:38:53,439 INFO L78 Accepts]: Start accepts. Automaton has 6294 states and 30830 transitions. Word has length 12 [2021-08-21 13:38:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:38:53,440 INFO L470 AbstractCegarLoop]: Abstraction has 6294 states and 30830 transitions. [2021-08-21 13:38:53,440 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 13:38:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 6294 states and 30830 transitions. [2021-08-21 13:38:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 13:38:53,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:38:53,443 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:38:53,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:38:53,444 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 13:38:53,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:38:53,444 INFO L82 PathProgramCache]: Analyzing trace with hash 266963113, now seen corresponding path program 1 times [2021-08-21 13:38:53,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:38:53,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895538397] [2021-08-21 13:38:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:38:53,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:38:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:38:53,546 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 13:38:53,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:38:53,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895538397] [2021-08-21 13:38:53,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895538397] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:38:53,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:38:53,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 13:38:53,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172933427] [2021-08-21 13:38:53,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:38:53,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:38:53,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:38:53,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:38:53,550 INFO L87 Difference]: Start difference. First operand 6294 states and 30830 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 13:38:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:38:53,938 INFO L93 Difference]: Finished difference Result 10908 states and 54281 transitions. [2021-08-21 13:38:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:38:53,939 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 13:38:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:38:54,006 INFO L225 Difference]: With dead ends: 10908 [2021-08-21 13:38:54,006 INFO L226 Difference]: Without dead ends: 9652 [2021-08-21 13:38:54,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:38:54,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9652 states. [2021-08-21 13:38:54,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9652 to 7343. [2021-08-21 13:38:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7343 states, 7342 states have (on average 4.9600926178153095) internal successors, (36417), 7342 states have internal predecessors, (36417), 0 states have call successors, (0), 0 states 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 13:38:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7343 states to 7343 states and 36417 transitions. [2021-08-21 13:38:54,501 INFO L78 Accepts]: Start accepts. Automaton has 7343 states and 36417 transitions. Word has length 13 [2021-08-21 13:38:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:38:54,501 INFO L470 AbstractCegarLoop]: Abstraction has 7343 states and 36417 transitions. [2021-08-21 13:38:54,501 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 13:38:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7343 states and 36417 transitions. [2021-08-21 13:38:54,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 13:38:54,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:38:54,512 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:38:54,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 13:38:54,512 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 13:38:54,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:38:54,513 INFO L82 PathProgramCache]: Analyzing trace with hash -721766125, now seen corresponding path program 1 times [2021-08-21 13:38:54,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:38:54,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729831134] [2021-08-21 13:38:54,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:38:54,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:38:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:38:54,702 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 13:38:54,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:38:54,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729831134] [2021-08-21 13:38:54,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729831134] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:38:54,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:38:54,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:38:54,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428366792] [2021-08-21 13:38:54,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:38:54,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:38:54,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:38:54,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:38:54,704 INFO L87 Difference]: Start difference. First operand 7343 states and 36417 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 13:38:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:38:54,938 INFO L93 Difference]: Finished difference Result 10235 states and 49936 transitions. [2021-08-21 13:38:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 13:38:54,938 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 13:38:54,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:38:55,001 INFO L225 Difference]: With dead ends: 10235 [2021-08-21 13:38:55,002 INFO L226 Difference]: Without dead ends: 8651 [2021-08-21 13:38:55,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:38:55,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8651 states. [2021-08-21 13:38:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8651 to 8169. [2021-08-21 13:38:55,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8169 states, 8168 states have (on average 4.936581782566112) internal successors, (40322), 8168 states have internal predecessors, (40322), 0 states have call successors, (0), 0 states 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 13:38:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8169 states to 8169 states and 40322 transitions. [2021-08-21 13:38:55,649 INFO L78 Accepts]: Start accepts. Automaton has 8169 states and 40322 transitions. Word has length 16 [2021-08-21 13:38:55,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:38:55,650 INFO L470 AbstractCegarLoop]: Abstraction has 8169 states and 40322 transitions. [2021-08-21 13:38:55,650 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 13:38:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 8169 states and 40322 transitions. [2021-08-21 13:38:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 13:38:55,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:38:55,665 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:38:55,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 13:38:55,666 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 13:38:55,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:38:55,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1389710060, now seen corresponding path program 2 times [2021-08-21 13:38:55,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:38:55,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757529984] [2021-08-21 13:38:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:38:55,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:38:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:38:55,779 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 13:38:55,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:38:55,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757529984] [2021-08-21 13:38:55,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757529984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:38:55,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88315577] [2021-08-21 13:38:55,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:38:55,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:38:55,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:38:55,782 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 13:38:55,783 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 13:38:55,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:38:55,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:38:55,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 13:38:55,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:38:56,043 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 13:38:56,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88315577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:38:56,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:38:56,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 13:38:56,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455338917] [2021-08-21 13:38:56,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:38:56,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:38:56,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:38:56,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:38:56,047 INFO L87 Difference]: Start difference. First operand 8169 states and 40322 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 13:38:56,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:38:56,389 INFO L93 Difference]: Finished difference Result 11216 states and 56496 transitions. [2021-08-21 13:38:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:38:56,390 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 13:38:56,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:38:56,462 INFO L225 Difference]: With dead ends: 11216 [2021-08-21 13:38:56,463 INFO L226 Difference]: Without dead ends: 10165 [2021-08-21 13:38:56,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:38:56,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10165 states. [2021-08-21 13:38:56,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10165 to 7522. [2021-08-21 13:38:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7522 states, 7521 states have (on average 4.994548597261002) internal successors, (37564), 7521 states have internal predecessors, (37564), 0 states have call successors, (0), 0 states 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 13:38:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7522 states to 7522 states and 37564 transitions. [2021-08-21 13:38:56,940 INFO L78 Accepts]: Start accepts. Automaton has 7522 states and 37564 transitions. Word has length 17 [2021-08-21 13:38:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:38:56,940 INFO L470 AbstractCegarLoop]: Abstraction has 7522 states and 37564 transitions. [2021-08-21 13:38:56,940 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 13:38:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 7522 states and 37564 transitions. [2021-08-21 13:38:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 13:38:56,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:38:56,955 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 13:38:56,982 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 13:38:57,173 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 13:38:57,173 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 13:38:57,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:38:57,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1652761973, now seen corresponding path program 1 times [2021-08-21 13:38:57,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:38:57,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16157632] [2021-08-21 13:38:57,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:38:57,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:38:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:38:57,289 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 13:38:57,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:38:57,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16157632] [2021-08-21 13:38:57,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16157632] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:38:57,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:38:57,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 13:38:57,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152177629] [2021-08-21 13:38:57,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:38:57,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:38:57,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:38:57,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:38:57,292 INFO L87 Difference]: Start difference. First operand 7522 states and 37564 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 13:38:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:38:57,563 INFO L93 Difference]: Finished difference Result 10786 states and 53368 transitions. [2021-08-21 13:38:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:38:57,567 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 13:38:57,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:38:57,623 INFO L225 Difference]: With dead ends: 10786 [2021-08-21 13:38:57,624 INFO L226 Difference]: Without dead ends: 9058 [2021-08-21 13:38:57,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:38:57,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9058 states. [2021-08-21 13:38:58,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9058 to 8514. [2021-08-21 13:38:58,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8514 states, 8513 states have (on average 5.0023493480559145) internal successors, (42585), 8513 states have internal predecessors, (42585), 0 states have call successors, (0), 0 states 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 13:38:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8514 states to 8514 states and 42585 transitions. [2021-08-21 13:38:58,158 INFO L78 Accepts]: Start accepts. Automaton has 8514 states and 42585 transitions. Word has length 19 [2021-08-21 13:38:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:38:58,159 INFO L470 AbstractCegarLoop]: Abstraction has 8514 states and 42585 transitions. [2021-08-21 13:38:58,159 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 13:38:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand 8514 states and 42585 transitions. [2021-08-21 13:38:58,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:38:58,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:38:58,177 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 13:38:58,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 13:38:58,177 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 13:38:58,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:38:58,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1787244905, now seen corresponding path program 2 times [2021-08-21 13:38:58,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:38:58,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479463852] [2021-08-21 13:38:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:38:58,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:38:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:38:58,298 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 13:38:58,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:38:58,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479463852] [2021-08-21 13:38:58,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479463852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:38:58,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016429454] [2021-08-21 13:38:58,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:38:58,299 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:38:58,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:38:58,305 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 13:38:58,307 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 13:38:58,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:38:58,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:38:58,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 13:38:58,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:38:58,646 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 13:38:58,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016429454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:38:58,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:38:58,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 13:38:58,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354995002] [2021-08-21 13:38:58,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:38:58,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:38:58,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:38:58,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:38:58,648 INFO L87 Difference]: Start difference. First operand 8514 states and 42585 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 13:38:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:38:59,047 INFO L93 Difference]: Finished difference Result 10418 states and 52543 transitions. [2021-08-21 13:38:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 13:38:59,048 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 13:38:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:38:59,096 INFO L225 Difference]: With dead ends: 10418 [2021-08-21 13:38:59,096 INFO L226 Difference]: Without dead ends: 8746 [2021-08-21 13:38:59,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:38:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8746 states. [2021-08-21 13:38:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8746 to 6633. [2021-08-21 13:38:59,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6633 states, 6632 states have (on average 4.992913148371532) internal successors, (33113), 6632 states have internal predecessors, (33113), 0 states have call successors, (0), 0 states 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 13:38:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6633 states to 6633 states and 33113 transitions. [2021-08-21 13:38:59,510 INFO L78 Accepts]: Start accepts. Automaton has 6633 states and 33113 transitions. Word has length 20 [2021-08-21 13:38:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:38:59,510 INFO L470 AbstractCegarLoop]: Abstraction has 6633 states and 33113 transitions. [2021-08-21 13:38:59,510 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 13:38:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 6633 states and 33113 transitions. [2021-08-21 13:38:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:38:59,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:38:59,533 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 13:38:59,566 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 13:38:59,749 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 13:38:59,749 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 13:38:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:38:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1347148809, now seen corresponding path program 1 times [2021-08-21 13:38:59,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:38:59,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187047933] [2021-08-21 13:38:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:38:59,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:38:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:38:59,893 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 13:38:59,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:38:59,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187047933] [2021-08-21 13:38:59,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187047933] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:38:59,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:38:59,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 13:38:59,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065415160] [2021-08-21 13:38:59,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:38:59,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:38:59,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:38:59,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:38:59,895 INFO L87 Difference]: Start difference. First operand 6633 states and 33113 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 13:39:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:00,228 INFO L93 Difference]: Finished difference Result 9537 states and 47375 transitions. [2021-08-21 13:39:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:39:00,229 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 13:39:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:00,273 INFO L225 Difference]: With dead ends: 9537 [2021-08-21 13:39:00,273 INFO L226 Difference]: Without dead ends: 7861 [2021-08-21 13:39:00,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:39:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7861 states. [2021-08-21 13:39:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7861 to 7377. [2021-08-21 13:39:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7377 states, 7376 states have (on average 5.009219088937093) internal successors, (36948), 7376 states have internal predecessors, (36948), 0 states have call successors, (0), 0 states 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 13:39:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7377 states to 7377 states and 36948 transitions. [2021-08-21 13:39:00,738 INFO L78 Accepts]: Start accepts. Automaton has 7377 states and 36948 transitions. Word has length 22 [2021-08-21 13:39:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:00,738 INFO L470 AbstractCegarLoop]: Abstraction has 7377 states and 36948 transitions. [2021-08-21 13:39:00,738 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 13:39:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 7377 states and 36948 transitions. [2021-08-21 13:39:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 13:39:00,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:00,756 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 13:39:00,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 13:39:00,757 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 13:39:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:00,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1723402441, now seen corresponding path program 2 times [2021-08-21 13:39:00,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:00,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192702605] [2021-08-21 13:39:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:00,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:00,866 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 13:39:00,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:00,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192702605] [2021-08-21 13:39:00,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192702605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:00,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948121476] [2021-08-21 13:39:00,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:39:00,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:39:00,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:39:00,869 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 13:39:00,898 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 13:39:00,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:39:00,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:39:00,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 13:39:00,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:39:01,177 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 13:39:01,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948121476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:01,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:39:01,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 13:39:01,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224174003] [2021-08-21 13:39:01,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:39:01,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:01,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:39:01,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:39:01,179 INFO L87 Difference]: Start difference. First operand 7377 states and 36948 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 13:39:01,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:01,475 INFO L93 Difference]: Finished difference Result 7720 states and 38781 transitions. [2021-08-21 13:39:01,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:39:01,476 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 13:39:01,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:01,508 INFO L225 Difference]: With dead ends: 7720 [2021-08-21 13:39:01,508 INFO L226 Difference]: Without dead ends: 5656 [2021-08-21 13:39:01,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:39:01,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5656 states. [2021-08-21 13:39:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5656 to 4600. [2021-08-21 13:39:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 4599 states have (on average 4.966297021091542) internal successors, (22840), 4599 states have internal predecessors, (22840), 0 states have call successors, (0), 0 states 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 13:39:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 22840 transitions. [2021-08-21 13:39:01,843 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 22840 transitions. Word has length 23 [2021-08-21 13:39:01,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:01,844 INFO L470 AbstractCegarLoop]: Abstraction has 4600 states and 22840 transitions. [2021-08-21 13:39:01,844 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 13:39:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 22840 transitions. [2021-08-21 13:39:01,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 13:39:01,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:01,855 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 13:39:01,885 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 13:39:02,073 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 13:39:02,073 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 13:39:02,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:02,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1044739735, now seen corresponding path program 1 times [2021-08-21 13:39:02,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:02,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941884622] [2021-08-21 13:39:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:02,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:02,206 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 13:39:02,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:02,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941884622] [2021-08-21 13:39:02,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941884622] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:39:02,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:39:02,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 13:39:02,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642657362] [2021-08-21 13:39:02,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:39:02,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:02,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:39:02,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:39:02,208 INFO L87 Difference]: Start difference. First operand 4600 states and 22840 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 13:39:02,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:02,554 INFO L93 Difference]: Finished difference Result 4600 states and 22776 transitions. [2021-08-21 13:39:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 13:39:02,554 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 13:39:02,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:02,572 INFO L225 Difference]: With dead ends: 4600 [2021-08-21 13:39:02,573 INFO L226 Difference]: Without dead ends: 3178 [2021-08-21 13:39:02,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:39:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2021-08-21 13:39:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 3178. [2021-08-21 13:39:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 3177 states have (on average 4.870947434686811) internal successors, (15475), 3177 states have internal predecessors, (15475), 0 states have call successors, (0), 0 states 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 13:39:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 15475 transitions. [2021-08-21 13:39:02,690 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 15475 transitions. Word has length 25 [2021-08-21 13:39:02,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:02,690 INFO L470 AbstractCegarLoop]: Abstraction has 3178 states and 15475 transitions. [2021-08-21 13:39:02,690 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 13:39:02,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 15475 transitions. [2021-08-21 13:39:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:39:02,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:02,700 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 13:39:02,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 13:39:02,700 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 13:39:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:02,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1119831047, now seen corresponding path program 2 times [2021-08-21 13:39:02,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:02,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186315929] [2021-08-21 13:39:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:02,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:02,873 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 13:39:02,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:02,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186315929] [2021-08-21 13:39:02,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186315929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:02,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713033345] [2021-08-21 13:39:02,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:39:02,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:39:02,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:39:02,875 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 13:39:02,876 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 13:39:03,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:39:03,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:39:03,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:39:03,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:39:03,246 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 13:39:03,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713033345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:03,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:39:03,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 13:39:03,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404663266] [2021-08-21 13:39:03,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:39:03,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:03,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:39:03,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:39:03,248 INFO L87 Difference]: Start difference. First operand 3178 states and 15475 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 13:39:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:03,418 INFO L93 Difference]: Finished difference Result 1848 states and 9324 transitions. [2021-08-21 13:39:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 13:39:03,419 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 13:39:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:03,419 INFO L225 Difference]: With dead ends: 1848 [2021-08-21 13:39:03,419 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 13:39:03,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:39:03,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 13:39:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 13:39:03,420 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 13:39:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 13:39:03,420 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-08-21 13:39:03,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:03,420 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 13:39:03,420 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 13:39:03,420 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 13:39:03,420 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 13:39:03,423 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ServerThreadErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:39:03,423 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 13:39:03,423 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 13:39:03,423 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 13:39:03,423 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 13:39:03,424 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4INUSE_VIOLATION [2021-08-21 13:39:03,424 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5INUSE_VIOLATION [2021-08-21 13:39:03,424 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ServerThreadErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:39:03,455 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 13:39:03,648 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 13:39:03,654 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 13:39:03,654 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 13:39:03,656 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:39:03 BasicIcfg [2021-08-21 13:39:03,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 13:39:03,658 INFO L168 Benchmark]: Toolchain (without parser) took 13005.07 ms. Allocated memory was 176.2 MB in the beginning and 5.1 GB in the end (delta: 5.0 GB). Free memory was 156.9 MB in the beginning and 4.6 GB in the end (delta: -4.4 GB). Peak memory consumption was 514.7 MB. Max. memory is 8.0 GB. [2021-08-21 13:39:03,658 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 176.2 MB. Free memory is still 158.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:39:03,658 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.07 ms. Allocated memory is still 176.2 MB. Free memory was 156.9 MB in the beginning and 155.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 13:39:03,659 INFO L168 Benchmark]: Boogie Preprocessor took 13.15 ms. Allocated memory is still 176.2 MB. Free memory was 155.0 MB in the beginning and 154.1 MB in the end (delta: 905.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:39:03,659 INFO L168 Benchmark]: RCFGBuilder took 246.46 ms. Allocated memory is still 176.2 MB. Free memory was 154.1 MB in the beginning and 140.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 13:39:03,659 INFO L168 Benchmark]: TraceAbstraction took 12706.16 ms. Allocated memory was 176.2 MB in the beginning and 5.1 GB in the end (delta: 5.0 GB). Free memory was 140.6 MB in the beginning and 4.6 GB in the end (delta: -4.5 GB). Peak memory consumption was 498.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:39:03,661 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 0.13 ms. Allocated memory is still 176.2 MB. Free memory is still 158.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 31.07 ms. Allocated memory is still 176.2 MB. Free memory was 156.9 MB in the beginning and 155.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.15 ms. Allocated memory is still 176.2 MB. Free memory was 155.0 MB in the beginning and 154.1 MB in the end (delta: 905.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 246.46 ms. Allocated memory is still 176.2 MB. Free memory was 154.1 MB in the beginning and 140.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12706.16 ms. Allocated memory was 176.2 MB in the beginning and 5.1 GB in the end (delta: 5.0 GB). Free memory was 140.6 MB in the beginning and 4.6 GB in the end (delta: -4.5 GB). Peak memory consumption was 498.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 74]: 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 9 procedures, 52 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 12621.5ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 155.2ms, AutomataDifference: 4107.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 290.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 579 SDtfs, 775 SDslu, 1981 SDs, 0 SdLazy, 2219 SolverSat, 449 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1311.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 566.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8514occurred in iteration=6, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4345.3ms AutomataMinimizationTime, 11 MinimizatonAttempts, 10831 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 41.1ms SsaConstructionTime, 146.3ms SatisfiabilityAnalysisTime, 2174.0ms InterpolantComputationTime, 289 NumberOfCodeBlocks, 289 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 274 ConstructedInterpolants, 0 QuantifiedInterpolants, 1459 SizeOfPredicates, 8 NumberOfNonLiveVariables, 188 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 15 InterpolantComputations, 7 PerfectInterpolantSequences, 0/8 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 13:39:03,693 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...