/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-serverassert07.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 19:03:08,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 19:03:08,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 19:03:08,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 19:03:08,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 19:03:08,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 19:03:08,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 19:03:08,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 19:03:08,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 19:03:08,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 19:03:08,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 19:03:08,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 19:03:08,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 19:03:08,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 19:03:08,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 19:03:08,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 19:03:08,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 19:03:08,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 19:03:08,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 19:03:08,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 19:03:08,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 19:03:08,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 19:03:08,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 19:03:08,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 19:03:08,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 19:03:08,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 19:03:08,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 19:03:08,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 19:03:08,823 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 19:03:08,843 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 19:03:08,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 19:03:08,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 19:03:08,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 19:03:08,845 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 19:03:08,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 19:03:08,845 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 19:03:08,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 19:03:08,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 19:03:08,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 19:03:08,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 19:03:08,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 19:03:08,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 19:03:08,846 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 19:03:08,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 19:03:08,846 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 19:03:08,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 19:03:08,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 19:03:08,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 19:03:08,847 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 19:03:08,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 19:03:08,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 19:03:08,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 19:03:08,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 19:03:08,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 19:03:08,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 19:03:08,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 19:03:08,848 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 19:03:08,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 19:03:08,848 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 19:03:08,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 19:03:09,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 19:03:09,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 19:03:09,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 19:03:09,219 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 19:03:09,220 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 19:03:09,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert07.bpl [2021-08-21 19:03:09,221 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert07.bpl' [2021-08-21 19:03:09,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 19:03:09,243 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 19:03:09,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 19:03:09,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 19:03:09,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 19:03:09,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 19:03:09,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 19:03:09,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 19:03:09,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 19:03:09,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 19:03:09,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 19:03:09,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 19:03:09,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 19:03:09,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 19:03:09,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:09,342 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 19:03:09,367 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 19:03:09,387 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-08-21 19:03:09,388 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-08-21 19:03:09,388 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-08-21 19:03:09,388 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-08-21 19:03:09,388 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-08-21 19:03:09,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-08-21 19:03:09,389 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 19:03:09,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 19:03:09,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 19:03:09,390 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 19:03:09,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 19:03:09,549 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-21 19:03:09,550 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-08-21 19:03:09,551 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:03:09 BoogieIcfgContainer [2021-08-21 19:03:09,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 19:03:09,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 19:03:09,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 19:03:09,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 19:03:09,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/2) ... [2021-08-21 19:03:09,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e489c9 and model type bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:03:09, skipping insertion in model container [2021-08-21 19:03:09,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:03:09" (2/2) ... [2021-08-21 19:03:09,558 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-serverassert07.bpl [2021-08-21 19:03:09,562 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 19:03:09,563 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 19:03:09,563 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 19:03:09,563 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 19:03:09,603 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-21 19:03:09,640 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 19:03:09,646 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 19:03:09,646 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-08-21 19:03:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 34993 states, 23333 states have (on average 7.9327990399862855) internal successors, (185096), 34992 states have internal predecessors, (185096), 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 19:03:15,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 19:03:15,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:15,634 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:15,635 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:03:15,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:15,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1841629554, now seen corresponding path program 1 times [2021-08-21 19:03:15,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:15,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906813448] [2021-08-21 19:03:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:15,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:15,920 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 19:03:15,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:15,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906813448] [2021-08-21 19:03:15,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906813448] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:15,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:15,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:03:15,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013994766] [2021-08-21 19:03:15,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 19:03:15,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:15,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 19:03:15,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 19:03:16,042 INFO L87 Difference]: Start difference. First operand has 34993 states, 23333 states have (on average 7.9327990399862855) internal successors, (185096), 34992 states have internal predecessors, (185096), 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 19:03:17,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:17,766 INFO L93 Difference]: Finished difference Result 74870 states and 395637 transitions. [2021-08-21 19:03:17,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 19:03:17,767 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 19:03:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:18,490 INFO L225 Difference]: With dead ends: 74870 [2021-08-21 19:03:18,490 INFO L226 Difference]: Without dead ends: 48849 [2021-08-21 19:03:18,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 19:03:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48849 states. [2021-08-21 19:03:22,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48849 to 41577. [2021-08-21 19:03:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41577 states, 39755 states have (on average 7.503986919884292) internal successors, (298321), 41576 states have internal predecessors, (298321), 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 19:03:23,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41577 states to 41577 states and 298321 transitions. [2021-08-21 19:03:23,713 INFO L78 Accepts]: Start accepts. Automaton has 41577 states and 298321 transitions. Word has length 10 [2021-08-21 19:03:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:23,714 INFO L470 AbstractCegarLoop]: Abstraction has 41577 states and 298321 transitions. [2021-08-21 19:03:23,714 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 19:03:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 41577 states and 298321 transitions. [2021-08-21 19:03:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 19:03:23,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:23,728 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:23,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 19:03:23,729 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:03:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:23,730 INFO L82 PathProgramCache]: Analyzing trace with hash -279466694, now seen corresponding path program 1 times [2021-08-21 19:03:23,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:23,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30717853] [2021-08-21 19:03:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:23,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:23,786 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 19:03:23,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:23,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30717853] [2021-08-21 19:03:23,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30717853] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:23,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:23,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 19:03:23,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692562624] [2021-08-21 19:03:23,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 19:03:23,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 19:03:23,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 19:03:23,790 INFO L87 Difference]: Start difference. First operand 41577 states and 298321 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 19:03:24,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:24,624 INFO L93 Difference]: Finished difference Result 41464 states and 220493 transitions. [2021-08-21 19:03:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 19:03:24,625 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 19:03:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:25,202 INFO L225 Difference]: With dead ends: 41464 [2021-08-21 19:03:25,202 INFO L226 Difference]: Without dead ends: 40505 [2021-08-21 19:03:25,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 19:03:25,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40505 states. [2021-08-21 19:03:26,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40505 to 40505. [2021-08-21 19:03:27,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40505 states, 38683 states have (on average 5.588759920378461) internal successors, (216190), 40504 states have internal predecessors, (216190), 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 19:03:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40505 states to 40505 states and 216190 transitions. [2021-08-21 19:03:27,574 INFO L78 Accepts]: Start accepts. Automaton has 40505 states and 216190 transitions. Word has length 12 [2021-08-21 19:03:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:27,575 INFO L470 AbstractCegarLoop]: Abstraction has 40505 states and 216190 transitions. [2021-08-21 19:03:27,575 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 19:03:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 40505 states and 216190 transitions. [2021-08-21 19:03:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 19:03:27,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:27,582 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:27,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 19:03:27,583 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:03:27,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:27,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1747818574, now seen corresponding path program 1 times [2021-08-21 19:03:27,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:27,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311527984] [2021-08-21 19:03:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:27,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:27,696 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 19:03:27,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:27,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311527984] [2021-08-21 19:03:27,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311527984] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:27,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:27,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:03:27,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417226865] [2021-08-21 19:03:27,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:27,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:27,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:27,702 INFO L87 Difference]: Start difference. First operand 40505 states and 216190 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 19:03:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:28,791 INFO L93 Difference]: Finished difference Result 51032 states and 283923 transitions. [2021-08-21 19:03:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 19:03:28,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 19:03:28,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:29,204 INFO L225 Difference]: With dead ends: 51032 [2021-08-21 19:03:29,204 INFO L226 Difference]: Without dead ends: 51032 [2021-08-21 19:03:29,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51032 states. [2021-08-21 19:03:30,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51032 to 37080. [2021-08-21 19:03:31,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37080 states, 35258 states have (on average 5.839071983663282) internal successors, (205874), 37079 states have internal predecessors, (205874), 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 19:03:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37080 states to 37080 states and 205874 transitions. [2021-08-21 19:03:31,633 INFO L78 Accepts]: Start accepts. Automaton has 37080 states and 205874 transitions. Word has length 13 [2021-08-21 19:03:31,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:31,641 INFO L470 AbstractCegarLoop]: Abstraction has 37080 states and 205874 transitions. [2021-08-21 19:03:31,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 19:03:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 37080 states and 205874 transitions. [2021-08-21 19:03:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 19:03:31,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:31,644 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:31,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 19:03:31,644 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:03:31,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:31,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1747728364, now seen corresponding path program 2 times [2021-08-21 19:03:31,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:31,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92398247] [2021-08-21 19:03:31,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:31,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:31,717 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 19:03:31,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:31,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92398247] [2021-08-21 19:03:31,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92398247] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:31,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:31,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 19:03:31,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843197469] [2021-08-21 19:03:31,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 19:03:31,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:31,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 19:03:31,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:03:31,720 INFO L87 Difference]: Start difference. First operand 37080 states and 205874 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 19:03:32,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:32,950 INFO L93 Difference]: Finished difference Result 58569 states and 323071 transitions. [2021-08-21 19:03:32,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:32,951 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 19:03:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:33,508 INFO L225 Difference]: With dead ends: 58569 [2021-08-21 19:03:33,508 INFO L226 Difference]: Without dead ends: 56764 [2021-08-21 19:03:33,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:03:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56764 states. [2021-08-21 19:03:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56764 to 49806. [2021-08-21 19:03:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49806 states, 47985 states have (on average 5.670105241221215) internal successors, (272080), 49805 states have internal predecessors, (272080), 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 19:03:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49806 states to 49806 states and 272080 transitions. [2021-08-21 19:03:36,327 INFO L78 Accepts]: Start accepts. Automaton has 49806 states and 272080 transitions. Word has length 13 [2021-08-21 19:03:36,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:36,327 INFO L470 AbstractCegarLoop]: Abstraction has 49806 states and 272080 transitions. [2021-08-21 19:03:36,327 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 19:03:36,327 INFO L276 IsEmpty]: Start isEmpty. Operand 49806 states and 272080 transitions. [2021-08-21 19:03:36,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 19:03:36,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:36,337 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:36,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 19:03:36,338 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:03:36,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:36,338 INFO L82 PathProgramCache]: Analyzing trace with hash 813142928, now seen corresponding path program 1 times [2021-08-21 19:03:36,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:36,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827859915] [2021-08-21 19:03:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:36,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:36,450 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 19:03:36,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:36,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827859915] [2021-08-21 19:03:36,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827859915] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:36,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:36,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:03:36,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122326085] [2021-08-21 19:03:36,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:36,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:36,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:36,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:36,453 INFO L87 Difference]: Start difference. First operand 49806 states and 272080 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 19:03:37,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:37,846 INFO L93 Difference]: Finished difference Result 62774 states and 330986 transitions. [2021-08-21 19:03:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:37,847 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 19:03:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:38,357 INFO L225 Difference]: With dead ends: 62774 [2021-08-21 19:03:38,357 INFO L226 Difference]: Without dead ends: 57212 [2021-08-21 19:03:38,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57212 states. [2021-08-21 19:03:40,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57212 to 53955. [2021-08-21 19:03:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53955 states, 52134 states have (on average 5.676084704799171) internal successors, (295917), 53954 states have internal predecessors, (295917), 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 19:03:41,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53955 states to 53955 states and 295917 transitions. [2021-08-21 19:03:41,234 INFO L78 Accepts]: Start accepts. Automaton has 53955 states and 295917 transitions. Word has length 16 [2021-08-21 19:03:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:41,234 INFO L470 AbstractCegarLoop]: Abstraction has 53955 states and 295917 transitions. [2021-08-21 19:03:41,234 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 19:03:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 53955 states and 295917 transitions. [2021-08-21 19:03:41,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 19:03:41,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:41,252 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:41,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 19:03:41,252 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:03:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:41,252 INFO L82 PathProgramCache]: Analyzing trace with hash 718602923, now seen corresponding path program 2 times [2021-08-21 19:03:41,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:41,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140525255] [2021-08-21 19:03:41,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:41,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:41,343 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 19:03:41,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:41,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140525255] [2021-08-21 19:03:41,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140525255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:41,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13550062] [2021-08-21 19:03:41,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:41,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:41,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:41,354 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 19:03:41,362 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 19:03:41,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:41,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:41,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 19:03:41,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:41,669 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 19:03:41,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13550062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:41,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:41,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 19:03:41,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777899828] [2021-08-21 19:03:41,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 19:03:41,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:41,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 19:03:41,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 19:03:41,671 INFO L87 Difference]: Start difference. First operand 53955 states and 295917 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 19:03:43,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:43,594 INFO L93 Difference]: Finished difference Result 81401 states and 463325 transitions. [2021-08-21 19:03:43,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 19:03:43,594 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 19:03:43,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:44,262 INFO L225 Difference]: With dead ends: 81401 [2021-08-21 19:03:44,263 INFO L226 Difference]: Without dead ends: 77534 [2021-08-21 19:03:44,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 19:03:44,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77534 states. [2021-08-21 19:03:47,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77534 to 55406. [2021-08-21 19:03:47,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55406 states, 53588 states have (on average 5.746659699932821) internal successors, (307952), 55405 states have internal predecessors, (307952), 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 19:03:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55406 states to 55406 states and 307952 transitions. [2021-08-21 19:03:47,621 INFO L78 Accepts]: Start accepts. Automaton has 55406 states and 307952 transitions. Word has length 17 [2021-08-21 19:03:47,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:47,621 INFO L470 AbstractCegarLoop]: Abstraction has 55406 states and 307952 transitions. [2021-08-21 19:03:47,622 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 19:03:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 55406 states and 307952 transitions. [2021-08-21 19:03:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 19:03:47,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:47,653 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 19:03:47,672 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 19:03:47,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-21 19:03:47,854 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:03:47,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:47,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1318997942, now seen corresponding path program 1 times [2021-08-21 19:03:47,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:47,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718515752] [2021-08-21 19:03:47,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:47,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:47,957 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 19:03:47,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:47,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718515752] [2021-08-21 19:03:47,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718515752] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:47,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:47,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:03:47,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461192466] [2021-08-21 19:03:47,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:03:47,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:47,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:03:47,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:47,959 INFO L87 Difference]: Start difference. First operand 55406 states and 307952 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 19:03:49,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:49,795 INFO L93 Difference]: Finished difference Result 74451 states and 400993 transitions. [2021-08-21 19:03:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:49,796 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 19:03:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:50,336 INFO L225 Difference]: With dead ends: 74451 [2021-08-21 19:03:50,336 INFO L226 Difference]: Without dead ends: 66969 [2021-08-21 19:03:50,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66969 states. [2021-08-21 19:03:52,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66969 to 62389. [2021-08-21 19:03:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62389 states, 60571 states have (on average 5.779960707269155) internal successors, (350098), 62388 states have internal predecessors, (350098), 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 19:03:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62389 states to 62389 states and 350098 transitions. [2021-08-21 19:03:53,501 INFO L78 Accepts]: Start accepts. Automaton has 62389 states and 350098 transitions. Word has length 19 [2021-08-21 19:03:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:53,502 INFO L470 AbstractCegarLoop]: Abstraction has 62389 states and 350098 transitions. [2021-08-21 19:03:53,502 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 19:03:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 62389 states and 350098 transitions. [2021-08-21 19:03:53,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 19:03:53,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:53,534 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 19:03:53,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 19:03:53,535 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:03:53,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:53,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1788002371, now seen corresponding path program 2 times [2021-08-21 19:03:53,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:53,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839910110] [2021-08-21 19:03:53,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:53,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:54,125 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 19:03:54,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:54,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839910110] [2021-08-21 19:03:54,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839910110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:54,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074388482] [2021-08-21 19:03:54,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:54,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:54,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:54,138 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 19:03:54,145 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 19:03:54,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:54,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:54,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 19:03:54,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:54,402 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 19:03:54,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074388482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:54,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:54,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 19:03:54,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669891219] [2021-08-21 19:03:54,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 19:03:54,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:54,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 19:03:54,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 19:03:54,404 INFO L87 Difference]: Start difference. First operand 62389 states and 350098 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 19:03:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:56,098 INFO L93 Difference]: Finished difference Result 87336 states and 502471 transitions. [2021-08-21 19:03:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:56,099 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 19:03:56,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:57,622 INFO L225 Difference]: With dead ends: 87336 [2021-08-21 19:03:57,623 INFO L226 Difference]: Without dead ends: 80540 [2021-08-21 19:03:57,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 19:03:57,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80540 states. [2021-08-21 19:03:59,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80540 to 56472. [2021-08-21 19:04:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56472 states, 54663 states have (on average 5.788815103452061) internal successors, (316434), 56471 states have internal predecessors, (316434), 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 19:04:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56472 states to 56472 states and 316434 transitions. [2021-08-21 19:04:00,850 INFO L78 Accepts]: Start accepts. Automaton has 56472 states and 316434 transitions. Word has length 20 [2021-08-21 19:04:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:00,851 INFO L470 AbstractCegarLoop]: Abstraction has 56472 states and 316434 transitions. [2021-08-21 19:04:00,851 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 19:04:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 56472 states and 316434 transitions. [2021-08-21 19:04:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 19:04:00,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:00,932 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 19:04:00,957 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 19:04:01,148 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,SelfDestructingSolverStorable7 [2021-08-21 19:04:01,149 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:04:01,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:01,150 INFO L82 PathProgramCache]: Analyzing trace with hash 865914586, now seen corresponding path program 1 times [2021-08-21 19:04:01,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:01,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807120006] [2021-08-21 19:04:01,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:01,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:01,287 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 19:04:01,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:01,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807120006] [2021-08-21 19:04:01,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807120006] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:04:01,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:04:01,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 19:04:01,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014883491] [2021-08-21 19:04:01,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 19:04:01,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:01,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 19:04:01,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:04:01,289 INFO L87 Difference]: Start difference. First operand 56472 states and 316434 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 19:04:03,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:03,112 INFO L93 Difference]: Finished difference Result 78325 states and 427777 transitions. [2021-08-21 19:04:03,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 19:04:03,113 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 19:04:03,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:03,709 INFO L225 Difference]: With dead ends: 78325 [2021-08-21 19:04:03,709 INFO L226 Difference]: Without dead ends: 69891 [2021-08-21 19:04:03,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:04:03,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69891 states. [2021-08-21 19:04:06,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69891 to 64757. [2021-08-21 19:04:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64757 states, 62948 states have (on average 5.847016585117875) internal successors, (368058), 64756 states have internal predecessors, (368058), 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 19:04:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64757 states to 64757 states and 368058 transitions. [2021-08-21 19:04:07,035 INFO L78 Accepts]: Start accepts. Automaton has 64757 states and 368058 transitions. Word has length 22 [2021-08-21 19:04:07,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:07,035 INFO L470 AbstractCegarLoop]: Abstraction has 64757 states and 368058 transitions. [2021-08-21 19:04:07,035 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 19:04:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand 64757 states and 368058 transitions. [2021-08-21 19:04:07,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 19:04:07,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:07,602 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 19:04:07,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 19:04:07,603 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:04:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:07,603 INFO L82 PathProgramCache]: Analyzing trace with hash 629039097, now seen corresponding path program 2 times [2021-08-21 19:04:07,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:07,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095174640] [2021-08-21 19:04:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:07,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:07,741 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 19:04:07,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:07,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095174640] [2021-08-21 19:04:07,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095174640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:07,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661527073] [2021-08-21 19:04:07,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:04:07,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:07,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:07,753 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 19:04:07,754 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 19:04:07,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:04:07,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:07,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 19:04:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:08,009 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 19:04:08,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661527073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:08,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:08,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 19:04:08,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819820751] [2021-08-21 19:04:08,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 19:04:08,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:08,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 19:04:08,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-21 19:04:08,011 INFO L87 Difference]: Start difference. First operand 64757 states and 368058 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 19:04:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:09,406 INFO L93 Difference]: Finished difference Result 83603 states and 482369 transitions. [2021-08-21 19:04:09,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 19:04:09,407 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 19:04:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:10,417 INFO L225 Difference]: With dead ends: 83603 [2021-08-21 19:04:10,418 INFO L226 Difference]: Without dead ends: 73703 [2021-08-21 19:04:10,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-21 19:04:10,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73703 states. [2021-08-21 19:04:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73703 to 52234. [2021-08-21 19:04:12,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52234 states, 50452 states have (on average 5.789007373344962) internal successors, (292067), 52233 states have internal predecessors, (292067), 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 19:04:13,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52234 states to 52234 states and 292067 transitions. [2021-08-21 19:04:13,435 INFO L78 Accepts]: Start accepts. Automaton has 52234 states and 292067 transitions. Word has length 23 [2021-08-21 19:04:13,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:13,436 INFO L470 AbstractCegarLoop]: Abstraction has 52234 states and 292067 transitions. [2021-08-21 19:04:13,436 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 19:04:13,436 INFO L276 IsEmpty]: Start isEmpty. Operand 52234 states and 292067 transitions. [2021-08-21 19:04:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 19:04:13,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:13,517 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 19:04:13,537 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 19:04:13,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:13,718 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:04:13,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:13,719 INFO L82 PathProgramCache]: Analyzing trace with hash 605268904, now seen corresponding path program 1 times [2021-08-21 19:04:13,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:13,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994390967] [2021-08-21 19:04:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:13,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:13,847 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 19:04:13,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:13,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994390967] [2021-08-21 19:04:13,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994390967] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:04:13,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:04:13,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 19:04:13,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211270541] [2021-08-21 19:04:13,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:04:13,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:04:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:13,849 INFO L87 Difference]: Start difference. First operand 52234 states and 292067 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 19:04:15,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:15,308 INFO L93 Difference]: Finished difference Result 74011 states and 405734 transitions. [2021-08-21 19:04:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:04:15,308 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 19:04:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:16,235 INFO L225 Difference]: With dead ends: 74011 [2021-08-21 19:04:16,235 INFO L226 Difference]: Without dead ends: 65421 [2021-08-21 19:04:16,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:16,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65421 states. [2021-08-21 19:04:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65421 to 60349. [2021-08-21 19:04:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60349 states, 58567 states have (on average 5.875066163539194) internal successors, (344085), 60348 states have internal predecessors, (344085), 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 19:04:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60349 states to 60349 states and 344085 transitions. [2021-08-21 19:04:19,405 INFO L78 Accepts]: Start accepts. Automaton has 60349 states and 344085 transitions. Word has length 25 [2021-08-21 19:04:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:19,405 INFO L470 AbstractCegarLoop]: Abstraction has 60349 states and 344085 transitions. [2021-08-21 19:04:19,405 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 19:04:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 60349 states and 344085 transitions. [2021-08-21 19:04:19,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 19:04:19,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:19,478 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 19:04:19,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 19:04:19,480 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:04:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1138957547, now seen corresponding path program 2 times [2021-08-21 19:04:19,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:19,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76021026] [2021-08-21 19:04:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:19,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:19,635 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 19:04:19,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:19,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76021026] [2021-08-21 19:04:19,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76021026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:19,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946836587] [2021-08-21 19:04:19,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:04:19,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:19,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:19,638 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 19:04:19,639 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 19:04:19,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:04:19,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:19,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 19:04:19,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:19,951 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 19:04:19,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946836587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:19,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:19,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 19:04:19,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266231088] [2021-08-21 19:04:19,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 19:04:19,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:19,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 19:04:19,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-21 19:04:19,956 INFO L87 Difference]: Start difference. First operand 60349 states and 344085 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 19:04:21,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:21,675 INFO L93 Difference]: Finished difference Result 70448 states and 405741 transitions. [2021-08-21 19:04:21,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 19:04:21,675 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 19:04:21,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:22,183 INFO L225 Difference]: With dead ends: 70448 [2021-08-21 19:04:22,183 INFO L226 Difference]: Without dead ends: 57917 [2021-08-21 19:04:22,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-21 19:04:22,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57917 states. [2021-08-21 19:04:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57917 to 42604. [2021-08-21 19:04:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42604 states, 40903 states have (on average 5.7757377209495635) internal successors, (236245), 42603 states have internal predecessors, (236245), 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 19:04:24,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42604 states to 42604 states and 236245 transitions. [2021-08-21 19:04:24,787 INFO L78 Accepts]: Start accepts. Automaton has 42604 states and 236245 transitions. Word has length 26 [2021-08-21 19:04:24,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:24,787 INFO L470 AbstractCegarLoop]: Abstraction has 42604 states and 236245 transitions. [2021-08-21 19:04:24,788 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 19:04:24,788 INFO L276 IsEmpty]: Start isEmpty. Operand 42604 states and 236245 transitions. [2021-08-21 19:04:24,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 19:04:24,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:24,951 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:24,979 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 19:04:25,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:25,165 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:04:25,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:25,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2005173760, now seen corresponding path program 1 times [2021-08-21 19:04:25,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:25,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897519443] [2021-08-21 19:04:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:25,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:25,305 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 19:04:25,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:25,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897519443] [2021-08-21 19:04:25,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897519443] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:04:25,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:04:25,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 19:04:25,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490292065] [2021-08-21 19:04:25,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 19:04:25,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:25,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 19:04:25,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 19:04:25,307 INFO L87 Difference]: Start difference. First operand 42604 states and 236245 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:27,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:27,035 INFO L93 Difference]: Finished difference Result 61418 states and 336528 transitions. [2021-08-21 19:04:27,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 19:04:27,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 19:04:27,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:27,670 INFO L225 Difference]: With dead ends: 61418 [2021-08-21 19:04:27,670 INFO L226 Difference]: Without dead ends: 53210 [2021-08-21 19:04:27,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 19:04:27,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53210 states. [2021-08-21 19:04:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53210 to 48838. [2021-08-21 19:04:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48838 states, 47137 states have (on average 5.902178755542355) internal successors, (278211), 48837 states have internal predecessors, (278211), 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 19:04:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48838 states to 48838 states and 278211 transitions. [2021-08-21 19:04:30,465 INFO L78 Accepts]: Start accepts. Automaton has 48838 states and 278211 transitions. Word has length 28 [2021-08-21 19:04:30,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:30,466 INFO L470 AbstractCegarLoop]: Abstraction has 48838 states and 278211 transitions. [2021-08-21 19:04:30,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:30,466 INFO L276 IsEmpty]: Start isEmpty. Operand 48838 states and 278211 transitions. [2021-08-21 19:04:30,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 19:04:30,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:30,546 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:30,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 19:04:30,547 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:04:30,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:30,547 INFO L82 PathProgramCache]: Analyzing trace with hash -532294305, now seen corresponding path program 2 times [2021-08-21 19:04:30,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:30,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067064411] [2021-08-21 19:04:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:30,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:30,696 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 19:04:30,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:30,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067064411] [2021-08-21 19:04:30,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067064411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:30,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178000968] [2021-08-21 19:04:30,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:04:30,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:30,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:30,704 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:30,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 19:04:30,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:04:30,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:30,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 19:04:30,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:31,037 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 19:04:31,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178000968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:31,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:31,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 19:04:31,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277716043] [2021-08-21 19:04:31,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 19:04:31,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 19:04:31,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-08-21 19:04:31,040 INFO L87 Difference]: Start difference. First operand 48838 states and 278211 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:32,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:32,268 INFO L93 Difference]: Finished difference Result 49417 states and 285019 transitions. [2021-08-21 19:04:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 19:04:32,269 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 19:04:32,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:32,861 INFO L225 Difference]: With dead ends: 49417 [2021-08-21 19:04:32,861 INFO L226 Difference]: Without dead ends: 36174 [2021-08-21 19:04:32,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 19:04:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36174 states. [2021-08-21 19:04:33,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36174 to 28600. [2021-08-21 19:04:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28600 states, 27142 states have (on average 5.8008252892196595) internal successors, (157446), 28599 states have internal predecessors, (157446), 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 19:04:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28600 states to 28600 states and 157446 transitions. [2021-08-21 19:04:34,078 INFO L78 Accepts]: Start accepts. Automaton has 28600 states and 157446 transitions. Word has length 29 [2021-08-21 19:04:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:34,078 INFO L470 AbstractCegarLoop]: Abstraction has 28600 states and 157446 transitions. [2021-08-21 19:04:34,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 28600 states and 157446 transitions. [2021-08-21 19:04:34,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 19:04:34,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:34,119 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:34,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:34,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 19:04:34,322 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:04:34,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:34,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1478173958, now seen corresponding path program 1 times [2021-08-21 19:04:34,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:34,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776317614] [2021-08-21 19:04:34,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:34,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:34,478 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 19:04:34,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:34,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776317614] [2021-08-21 19:04:34,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776317614] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:04:34,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:04:34,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-21 19:04:34,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294501036] [2021-08-21 19:04:34,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 19:04:34,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:34,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 19:04:34,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-21 19:04:34,480 INFO L87 Difference]: Start difference. First operand 28600 states and 157446 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:35,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:35,720 INFO L93 Difference]: Finished difference Result 28600 states and 157318 transitions. [2021-08-21 19:04:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 19:04:35,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 19:04:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:35,858 INFO L225 Difference]: With dead ends: 28600 [2021-08-21 19:04:35,859 INFO L226 Difference]: Without dead ends: 21616 [2021-08-21 19:04:35,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-21 19:04:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21616 states. [2021-08-21 19:04:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21616 to 21616. [2021-08-21 19:04:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21616 states, 20158 states have (on average 5.922760194463737) internal successors, (119391), 21615 states have internal predecessors, (119391), 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 19:04:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21616 states to 21616 states and 119391 transitions. [2021-08-21 19:04:36,782 INFO L78 Accepts]: Start accepts. Automaton has 21616 states and 119391 transitions. Word has length 31 [2021-08-21 19:04:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:36,782 INFO L470 AbstractCegarLoop]: Abstraction has 21616 states and 119391 transitions. [2021-08-21 19:04:36,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:36,782 INFO L276 IsEmpty]: Start isEmpty. Operand 21616 states and 119391 transitions. [2021-08-21 19:04:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:36,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:36,814 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:36,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-21 19:04:36,814 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 19:04:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1617594413, now seen corresponding path program 2 times [2021-08-21 19:04:36,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:36,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087983191] [2021-08-21 19:04:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:36,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:36,973 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 19:04:36,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:36,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087983191] [2021-08-21 19:04:36,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087983191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:36,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918962272] [2021-08-21 19:04:36,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:04:36,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:36,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:36,975 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:37,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 19:04:37,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:04:37,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:37,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 19:04:37,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:37,660 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 19:04:37,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918962272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:37,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:37,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 19:04:37,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77311390] [2021-08-21 19:04:37,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 19:04:37,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:37,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 19:04:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-08-21 19:04:37,662 INFO L87 Difference]: Start difference. First operand 21616 states and 119391 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:38,052 INFO L93 Difference]: Finished difference Result 11666 states and 72054 transitions. [2021-08-21 19:04:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 19:04:38,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:38,053 INFO L225 Difference]: With dead ends: 11666 [2021-08-21 19:04:38,053 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 19:04:38,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-08-21 19:04:38,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 19:04:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 19:04:38,054 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 19:04:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 19:04:38,054 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-08-21 19:04:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:38,054 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 19:04:38,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 19:04:38,054 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 19:04:38,056 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ServerThreadErr0ASSERT_VIOLATIONASSERT [2021-08-21 19:04:38,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 19:04:38,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 19:04:38,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 19:04:38,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 19:04:38,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4INUSE_VIOLATION [2021-08-21 19:04:38,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5INUSE_VIOLATION [2021-08-21 19:04:38,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6INUSE_VIOLATION [2021-08-21 19:04:38,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7INUSE_VIOLATION [2021-08-21 19:04:38,058 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ServerThreadErr0ASSERT_VIOLATIONASSERT [2021-08-21 19:04:38,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:38,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 19:04:38,270 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 19:04:38,270 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 19:04:38,271 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:04:38 BasicIcfg [2021-08-21 19:04:38,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 19:04:38,273 INFO L168 Benchmark]: Toolchain (without parser) took 89029.00 ms. Allocated memory was 178.3 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 159.2 MB in the beginning and 6.0 GB in the end (delta: -5.9 GB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-21 19:04:38,273 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 178.3 MB. Free memory is still 160.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 19:04:38,273 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.53 ms. Allocated memory is still 178.3 MB. Free memory was 159.2 MB in the beginning and 157.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 19:04:38,273 INFO L168 Benchmark]: Boogie Preprocessor took 17.93 ms. Allocated memory is still 178.3 MB. Free memory was 157.3 MB in the beginning and 156.4 MB in the end (delta: 907.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:04:38,273 INFO L168 Benchmark]: RCFGBuilder took 250.63 ms. Allocated memory is still 178.3 MB. Free memory was 156.4 MB in the beginning and 143.2 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 19:04:38,274 INFO L168 Benchmark]: TraceAbstraction took 88718.68 ms. Allocated memory was 178.3 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 142.6 MB in the beginning and 6.0 GB in the end (delta: -5.9 GB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-21 19:04:38,274 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 0.22 ms. Allocated memory is still 178.3 MB. Free memory is still 160.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.53 ms. Allocated memory is still 178.3 MB. Free memory was 159.2 MB in the beginning and 157.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.93 ms. Allocated memory is still 178.3 MB. Free memory was 157.3 MB in the beginning and 156.4 MB in the end (delta: 907.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 250.63 ms. Allocated memory is still 178.3 MB. Free memory was 156.4 MB in the beginning and 143.2 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 88718.68 ms. Allocated memory was 178.3 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 142.6 MB in the beginning and 6.0 GB in the end (delta: -5.9 GB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 809239, positive: 595720, positive conditional: 595720, positive unconditional: 0, negative: 213519, negative conditional: 213519, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 753106, positive: 595720, positive conditional: 0, positive unconditional: 595720, negative: 157386, negative conditional: 0, negative unconditional: 157386, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 662, positive: 515, positive conditional: 0, positive unconditional: 515, negative: 147, negative conditional: 0, negative unconditional: 147, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 662, positive: 454, positive conditional: 0, positive unconditional: 454, negative: 208, negative conditional: 0, negative unconditional: 208, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 208, positive: 61, positive conditional: 0, positive unconditional: 61, negative: 147, negative conditional: 0, negative unconditional: 147, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 778, positive: 374, positive conditional: 0, positive unconditional: 374, negative: 405, negative conditional: 0, negative unconditional: 405, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 753106, positive: 595205, positive conditional: 0, positive unconditional: 595205, negative: 157239, negative conditional: 0, negative unconditional: 157239, unknown: 662, unknown conditional: 0, unknown unconditional: 662] , Statistics on independence cache: Total cache size (in pairs): 662, Positive cache size: 515, Positive conditional cache size: 0, Positive unconditional cache size: 515, Negative cache size: 147, Negative conditional cache size: 0, Negative unconditional cache size: 147, Independence queries for same thread: 56133 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 76]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 11 procedures, 62 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 88629.4ms, OverallIterations: 16, TraceHistogramMax: 2, EmptinessCheckTime: 1424.0ms, AutomataDifference: 32768.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5793.9ms, PartialOrderReductionTime: 5778.7ms, HoareTripleCheckerStatistics: 921 SDtfs, 1387 SDslu, 3900 SDs, 0 SdLazy, 6005 SolverSat, 1087 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3240.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 308 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 869.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=64757occurred in iteration=9, InterpolantAutomatonStates: 132, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 42310.0ms AutomataMinimizationTime, 16 MinimizatonAttempts, 141149 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 64.7ms SsaConstructionTime, 195.7ms SatisfiabilityAnalysisTime, 3475.2ms InterpolantComputationTime, 483 NumberOfCodeBlocks, 483 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 461 ConstructedInterpolants, 0 QuantifiedInterpolants, 2539 SizeOfPredicates, 12 NumberOfNonLiveVariables, 330 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 22 InterpolantComputations, 10 PerfectInterpolantSequences, 0/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-21 19:04:38,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...