/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert08.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 19:03:13,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 19:03:13,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 19:03:13,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 19:03:13,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 19:03:13,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 19:03:13,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 19:03:13,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 19:03:13,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 19:03:13,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 19:03:13,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 19:03:13,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 19:03:13,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 19:03:13,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 19:03:13,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 19:03:13,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 19:03:13,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 19:03:13,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 19:03:13,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 19:03:13,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 19:03:13,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 19:03:13,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 19:03:13,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 19:03:13,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 19:03:13,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 19:03:13,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 19:03:13,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 19:03:13,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 19:03:13,900 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-Delay.epf [2021-08-21 19:03:13,924 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 19:03:13,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 19:03:13,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 19:03:13,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 19:03:13,927 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 19:03:13,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 19:03:13,927 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 19:03:13,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 19:03:13,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 19:03:13,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 19:03:13,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 19:03:13,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 19:03:13,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 19:03:13,929 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 19:03:13,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 19:03:13,929 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 19:03:13,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 19:03:13,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 19:03:13,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 19:03:13,929 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 19:03:13,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 19:03:13,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 19:03:13,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 19:03:13,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 19:03:13,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 19:03:13,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 19:03:13,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 19:03:13,930 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 19:03:13,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 19:03:13,930 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 19:03:13,930 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 19:03:14,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 19:03:14,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 19:03:14,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 19:03:14,191 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 19:03:14,192 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 19:03:14,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert08.bpl [2021-08-21 19:03:14,193 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert08.bpl' [2021-08-21 19:03:14,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 19:03:14,210 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 19:03:14,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 19:03:14,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 19:03:14,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 19:03:14,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:14" (1/1) ... [2021-08-21 19:03:14,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:14" (1/1) ... [2021-08-21 19:03:14,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 19:03:14,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 19:03:14,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 19:03:14,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 19:03:14,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:14" (1/1) ... [2021-08-21 19:03:14,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:14" (1/1) ... [2021-08-21 19:03:14,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:14" (1/1) ... [2021-08-21 19:03:14,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:14" (1/1) ... [2021-08-21 19:03:14,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:14" (1/1) ... [2021-08-21 19:03:14,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:14" (1/1) ... [2021-08-21 19:03:14,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:14" (1/1) ... [2021-08-21 19:03:14,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 19:03:14,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 19:03:14,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 19:03:14,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 19:03:14,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:14" (1/1) ... [2021-08-21 19:03:14,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 19:03:14,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:14,274 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 19:03:14,276 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 19:03:14,299 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-08-21 19:03:14,299 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-08-21 19:03:14,299 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-08-21 19:03:14,299 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-08-21 19:03:14,299 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-08-21 19:03:14,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-08-21 19:03:14,300 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 19:03:14,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 19:03:14,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 19:03:14,300 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 19:03:14,429 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 19:03:14,429 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-21 19:03:14,430 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-08-21 19:03:14,431 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:03:14 BoogieIcfgContainer [2021-08-21 19:03:14,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 19:03:14,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 19:03:14,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 19:03:14,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 19:03:14,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:14" (1/2) ... [2021-08-21 19:03:14,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28af7ff0 and model type bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:03:14, skipping insertion in model container [2021-08-21 19:03:14,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:03:14" (2/2) ... [2021-08-21 19:03:14,436 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-serverassert08.bpl [2021-08-21 19:03:14,439 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 19:03:14,439 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 19:03:14,439 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 19:03:14,439 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 19:03:14,469 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-21 19:03:14,497 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 19:03:14,501 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 19:03:14,501 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-08-21 19:03:29,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 104977 states, 69989 states have (on average 8.936518595779336) internal successors, (625458), 104976 states have internal predecessors, (625458), 0 states have call successors, (0), 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 19:03:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 19:03:29,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:29,239 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:29,239 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 19:03:29,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:29,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1493695156, now seen corresponding path program 1 times [2021-08-21 19:03:29,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:29,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654771038] [2021-08-21 19:03:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:29,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:29,431 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 19:03:29,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:29,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654771038] [2021-08-21 19:03:29,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654771038] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:29,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:29,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:03:29,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121301319] [2021-08-21 19:03:29,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 19:03:29,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:29,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 19:03:29,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 19:03:29,700 INFO L87 Difference]: Start difference. First operand has 104977 states, 69989 states have (on average 8.936518595779336) internal successors, (625458), 104976 states have internal predecessors, (625458), 0 states have call successors, (0), 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 19:03:34,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:34,855 INFO L93 Difference]: Finished difference Result 225237 states and 1341819 transitions. [2021-08-21 19:03:34,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 19:03:34,856 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 19:03:34,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:36,953 INFO L225 Difference]: With dead ends: 225237 [2021-08-21 19:03:36,953 INFO L226 Difference]: Without dead ends: 146941 [2021-08-21 19:03:36,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 19:03:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146941 states. [2021-08-21 19:03:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146941 to 125091. [2021-08-21 19:03:45,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125091 states, 119624 states have (on average 8.513249849528522) internal successors, (1018389), 125090 states have internal predecessors, (1018389), 0 states have call successors, (0), 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 19:03:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125091 states to 125091 states and 1018389 transitions. [2021-08-21 19:03:47,669 INFO L78 Accepts]: Start accepts. Automaton has 125091 states and 1018389 transitions. Word has length 10 [2021-08-21 19:03:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:47,670 INFO L470 AbstractCegarLoop]: Abstraction has 125091 states and 1018389 transitions. [2021-08-21 19:03:47,670 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 19:03:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 125091 states and 1018389 transitions. [2021-08-21 19:03:47,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 19:03:47,672 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:47,672 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:47,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 19:03:47,673 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 19:03:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash 921976960, now seen corresponding path program 1 times [2021-08-21 19:03:47,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:47,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052685149] [2021-08-21 19:03:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:47,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:47,713 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 19:03:47,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:47,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052685149] [2021-08-21 19:03:47,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052685149] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:47,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:47,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 19:03:47,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753723441] [2021-08-21 19:03:47,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 19:03:47,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:47,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 19:03:47,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 19:03:47,716 INFO L87 Difference]: Start difference. First operand 125091 states and 1018389 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 19:03:51,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:51,096 INFO L93 Difference]: Finished difference Result 124871 states and 751406 transitions. [2021-08-21 19:03:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 19:03:51,097 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 19:03:51,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:53,818 INFO L225 Difference]: With dead ends: 124871 [2021-08-21 19:03:53,818 INFO L226 Difference]: Without dead ends: 122952 [2021-08-21 19:03:53,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 19:03:54,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122952 states. [2021-08-21 19:03:59,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122952 to 122952. [2021-08-21 19:04:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122952 states, 117485 states have (on average 6.311299314806146) internal successors, (741483), 122951 states have internal predecessors, (741483), 0 states have call successors, (0), 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 19:04:01,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122952 states to 122952 states and 741483 transitions. [2021-08-21 19:04:01,611 INFO L78 Accepts]: Start accepts. Automaton has 122952 states and 741483 transitions. Word has length 12 [2021-08-21 19:04:01,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:01,611 INFO L470 AbstractCegarLoop]: Abstraction has 122952 states and 741483 transitions. [2021-08-21 19:04:01,612 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 19:04:01,612 INFO L276 IsEmpty]: Start isEmpty. Operand 122952 states and 741483 transitions. [2021-08-21 19:04:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 19:04:01,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:01,617 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:01,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 19:04:01,617 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 19:04:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:01,618 INFO L82 PathProgramCache]: Analyzing trace with hash 337775979, now seen corresponding path program 1 times [2021-08-21 19:04:01,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:01,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600940202] [2021-08-21 19:04:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:01,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:01,672 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 19:04:01,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:01,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600940202] [2021-08-21 19:04:01,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600940202] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:04:01,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:04:01,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 19:04:01,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364544917] [2021-08-21 19:04:01,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 19:04:01,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:01,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 19:04:01,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:04:01,674 INFO L87 Difference]: Start difference. First operand 122952 states and 741483 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 19:04:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:05,852 INFO L93 Difference]: Finished difference Result 209043 states and 1315469 transitions. [2021-08-21 19:04:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:04:05,853 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 19:04:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:09,388 INFO L225 Difference]: With dead ends: 209043 [2021-08-21 19:04:09,388 INFO L226 Difference]: Without dead ends: 202166 [2021-08-21 19:04:09,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:04:09,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202166 states. [2021-08-21 19:04:17,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202166 to 152124. [2021-08-21 19:04:17,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152124 states, 146658 states have (on average 6.396671166932592) internal successors, (938123), 152123 states have internal predecessors, (938123), 0 states have call successors, (0), 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 19:04:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152124 states to 152124 states and 938123 transitions. [2021-08-21 19:04:19,372 INFO L78 Accepts]: Start accepts. Automaton has 152124 states and 938123 transitions. Word has length 13 [2021-08-21 19:04:19,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:19,378 INFO L470 AbstractCegarLoop]: Abstraction has 152124 states and 938123 transitions. [2021-08-21 19:04:19,379 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 19:04:19,379 INFO L276 IsEmpty]: Start isEmpty. Operand 152124 states and 938123 transitions. [2021-08-21 19:04:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 19:04:19,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:19,426 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:19,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 19:04:19,427 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 19:04:19,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:19,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1875048930, now seen corresponding path program 1 times [2021-08-21 19:04:19,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:19,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830671349] [2021-08-21 19:04:19,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:19,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:19,519 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 19:04:19,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:19,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830671349] [2021-08-21 19:04:19,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830671349] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:04:19,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:04:19,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:04:19,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126938254] [2021-08-21 19:04:19,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:19,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:19,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:19,522 INFO L87 Difference]: Start difference. First operand 152124 states and 938123 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 19:04:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:23,636 INFO L93 Difference]: Finished difference Result 184228 states and 1100590 transitions. [2021-08-21 19:04:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:23,637 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 19:04:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:26,084 INFO L225 Difference]: With dead ends: 184228 [2021-08-21 19:04:26,084 INFO L226 Difference]: Without dead ends: 170906 [2021-08-21 19:04:26,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:26,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170906 states. [2021-08-21 19:04:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170906 to 162769. [2021-08-21 19:04:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162769 states, 157303 states have (on average 6.400055942989009) internal successors, (1006748), 162768 states have internal predecessors, (1006748), 0 states have call successors, (0), 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 19:04:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162769 states to 162769 states and 1006748 transitions. [2021-08-21 19:04:37,826 INFO L78 Accepts]: Start accepts. Automaton has 162769 states and 1006748 transitions. Word has length 16 [2021-08-21 19:04:37,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:37,826 INFO L470 AbstractCegarLoop]: Abstraction has 162769 states and 1006748 transitions. [2021-08-21 19:04:37,826 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 19:04:37,826 INFO L276 IsEmpty]: Start isEmpty. Operand 162769 states and 1006748 transitions. [2021-08-21 19:04:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 19:04:37,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:37,856 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:37,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 19:04:37,857 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 19:04:37,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:37,857 INFO L82 PathProgramCache]: Analyzing trace with hash 114823250, now seen corresponding path program 2 times [2021-08-21 19:04:37,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:37,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895940251] [2021-08-21 19:04:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:37,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:37,921 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 19:04:37,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:37,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895940251] [2021-08-21 19:04:37,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895940251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:37,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200482529] [2021-08-21 19:04:37,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:04:37,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:37,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:37,924 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 19:04:37,927 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 19:04:37,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:04:37,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:37,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 19:04:37,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:38,080 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 19:04:38,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200482529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:38,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:38,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 19:04:38,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514548595] [2021-08-21 19:04:38,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 19:04:38,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:38,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 19:04:38,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 19:04:38,082 INFO L87 Difference]: Start difference. First operand 162769 states and 1006748 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 19:04:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:43,803 INFO L93 Difference]: Finished difference Result 253674 states and 1631731 transitions. [2021-08-21 19:04:43,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 19:04:43,804 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 19:04:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:48,940 INFO L225 Difference]: With dead ends: 253674 [2021-08-21 19:04:48,941 INFO L226 Difference]: Without dead ends: 244332 [2021-08-21 19:04:48,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 19:04:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244332 states. [2021-08-21 19:05:00,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244332 to 172610. [2021-08-21 19:05:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172610 states, 167147 states have (on average 6.479643666951845) internal successors, (1083053), 172609 states have internal predecessors, (1083053), 0 states have call successors, (0), 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 19:05:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172610 states to 172610 states and 1083053 transitions. [2021-08-21 19:05:02,911 INFO L78 Accepts]: Start accepts. Automaton has 172610 states and 1083053 transitions. Word has length 17 [2021-08-21 19:05:02,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:02,911 INFO L470 AbstractCegarLoop]: Abstraction has 172610 states and 1083053 transitions. [2021-08-21 19:05:02,911 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 19:05:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 172610 states and 1083053 transitions. [2021-08-21 19:05:02,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 19:05:02,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:02,960 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 19:05:02,978 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 19:05:03,176 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 19:05:03,176 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 19:05:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1930580969, now seen corresponding path program 1 times [2021-08-21 19:05:03,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:03,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65490801] [2021-08-21 19:05:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:03,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:03,287 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 19:05:03,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:03,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65490801] [2021-08-21 19:05:03,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65490801] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:05:03,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:05:03,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:05:03,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595549233] [2021-08-21 19:05:03,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:03,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:03,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:03,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:03,289 INFO L87 Difference]: Start difference. First operand 172610 states and 1083053 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)