/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-serverassert06.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 19:03:08,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 19:03:08,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 19:03:08,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 19:03:08,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 19:03:08,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 19:03:08,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 19:03:08,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 19:03:08,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 19:03:08,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 19:03:08,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 19:03:08,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 19:03:08,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 19:03:08,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 19:03:08,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 19:03:08,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 19:03:08,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 19:03:08,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 19:03:08,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 19:03:08,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 19:03:08,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 19:03:08,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 19:03:08,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 19:03:08,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 19:03:08,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 19:03:08,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 19:03:08,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 19:03:08,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 19:03:08,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 19:03:08,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 19:03:08,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 19:03:08,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 19:03:08,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 19:03:08,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 19:03:08,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 19:03:08,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 19:03:08,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 19:03:08,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 19:03:08,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 19:03:08,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 19:03:08,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 19:03:08,795 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 19:03:08,831 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 19:03:08,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 19:03:08,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 19:03:08,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 19:03:08,835 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 19:03:08,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 19:03:08,836 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 19:03:08,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 19:03:08,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 19:03:08,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 19:03:08,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 19:03:08,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 19:03:08,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 19:03:08,838 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 19:03:08,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 19:03:08,838 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 19:03:08,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 19:03:08,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 19:03:08,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 19:03:08,839 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 19:03:08,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 19:03:08,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 19:03:08,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 19:03:08,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 19:03:08,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 19:03:08,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 19:03:08,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 19:03:08,840 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 19:03:08,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 19:03:08,841 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 19:03:08,841 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 19:03:09,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 19:03:09,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 19:03:09,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 19:03:09,200 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 19:03:09,202 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 19:03:09,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert06.bpl [2021-08-21 19:03:09,204 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert06.bpl' [2021-08-21 19:03:09,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 19:03:09,239 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 19:03:09,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 19:03:09,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 19:03:09,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 19:03:09,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-serverassert06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,260 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-serverassert06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 19:03:09,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 19:03:09,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 19:03:09,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 19:03:09,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-serverassert06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-serverassert06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-serverassert06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-serverassert06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-serverassert06.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 FunctionInliner from plugin Boogie Preprocessor for "bluetooth-serverassert06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-serverassert06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 19:03:09,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 19:03:09,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 19:03:09,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 19:03:09,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-serverassert06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/1) ... [2021-08-21 19:03:09,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 19:03:09,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:09,326 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 19:03:09,355 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 19:03:09,378 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-08-21 19:03:09,378 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-08-21 19:03:09,379 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-08-21 19:03:09,379 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-08-21 19:03:09,379 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-08-21 19:03:09,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-08-21 19:03:09,379 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 19:03:09,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 19:03:09,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 19:03:09,380 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 19:03:09,559 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 19:03:09,559 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-21 19:03:09,560 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-08-21 19:03:09,562 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:03:09 BoogieIcfgContainer [2021-08-21 19:03:09,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 19:03:09,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 19:03:09,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 19:03:09,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 19:03:09,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:09" (1/2) ... [2021-08-21 19:03:09,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c65d89 and model type bluetooth-serverassert06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:03:09, skipping insertion in model container [2021-08-21 19:03:09,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:03:09" (2/2) ... [2021-08-21 19:03:09,572 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-serverassert06.bpl [2021-08-21 19:03:09,576 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 19:03:09,576 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 19:03:09,576 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 19:03:09,577 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 19:03:09,611 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-21 19:03:09,660 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 19:03:09,666 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 19:03:09,666 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-08-21 19:03:12,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 11665 states, 7781 states have (on average 6.926102043439147) internal successors, (53892), 11664 states have internal predecessors, (53892), 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 19:03:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 19:03:12,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:12,403 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:12,404 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:12,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:12,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1988407017, now seen corresponding path program 1 times [2021-08-21 19:03:12,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:12,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355368643] [2021-08-21 19:03:12,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:12,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:12,542 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 19:03:12,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:12,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355368643] [2021-08-21 19:03:12,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355368643] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:12,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:12,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:03:12,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002716340] [2021-08-21 19:03:12,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 19:03:12,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:12,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 19:03:12,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 19:03:12,599 INFO L87 Difference]: Start difference. First operand has 11665 states, 7781 states have (on average 6.926102043439147) internal successors, (53892), 11664 states have internal predecessors, (53892), 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 19:03:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:13,152 INFO L93 Difference]: Finished difference Result 24817 states and 114378 transitions. [2021-08-21 19:03:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 19:03:13,154 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 19:03:13,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:13,617 INFO L225 Difference]: With dead ends: 24817 [2021-08-21 19:03:13,618 INFO L226 Difference]: Without dead ends: 16196 [2021-08-21 19:03:13,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 19:03:13,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16196 states. [2021-08-21 19:03:14,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16196 to 13782. [2021-08-21 19:03:14,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13782 states, 13175 states have (on average 6.490777988614801) internal successors, (85516), 13781 states have internal predecessors, (85516), 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 19:03:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13782 states to 13782 states and 85516 transitions. [2021-08-21 19:03:15,162 INFO L78 Accepts]: Start accepts. Automaton has 13782 states and 85516 transitions. Word has length 10 [2021-08-21 19:03:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:15,163 INFO L470 AbstractCegarLoop]: Abstraction has 13782 states and 85516 transitions. [2021-08-21 19:03:15,163 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 19:03:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 13782 states and 85516 transitions. [2021-08-21 19:03:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 19:03:15,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:15,167 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:15,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 19:03:15,168 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:15,169 INFO L82 PathProgramCache]: Analyzing trace with hash -394063115, now seen corresponding path program 1 times [2021-08-21 19:03:15,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:15,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128392785] [2021-08-21 19:03:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:15,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:15,187 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 19:03:15,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:15,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128392785] [2021-08-21 19:03:15,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128392785] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:15,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:15,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 19:03:15,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586224813] [2021-08-21 19:03:15,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 19:03:15,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:15,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 19:03:15,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 19:03:15,191 INFO L87 Difference]: Start difference. First operand 13782 states and 85516 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 19:03:15,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:15,559 INFO L93 Difference]: Finished difference Result 13719 states and 63334 transitions. [2021-08-21 19:03:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 19:03:15,560 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 19:03:15,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:15,656 INFO L225 Difference]: With dead ends: 13719 [2021-08-21 19:03:15,657 INFO L226 Difference]: Without dead ends: 13240 [2021-08-21 19:03:15,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 19:03:15,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13240 states. [2021-08-21 19:03:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13240 to 13240. [2021-08-21 19:03:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13240 states, 12633 states have (on average 4.868756431568115) internal successors, (61507), 13239 states have internal predecessors, (61507), 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 19:03:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13240 states to 13240 states and 61507 transitions. [2021-08-21 19:03:16,473 INFO L78 Accepts]: Start accepts. Automaton has 13240 states and 61507 transitions. Word has length 12 [2021-08-21 19:03:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:16,473 INFO L470 AbstractCegarLoop]: Abstraction has 13240 states and 61507 transitions. [2021-08-21 19:03:16,473 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 19:03:16,473 INFO L276 IsEmpty]: Start isEmpty. Operand 13240 states and 61507 transitions. [2021-08-21 19:03:16,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 19:03:16,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:16,477 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:16,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 19:03:16,477 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:16,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:16,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2028942772, now seen corresponding path program 1 times [2021-08-21 19:03:16,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:16,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347042041] [2021-08-21 19:03:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:16,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:16,545 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 19:03:16,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:16,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347042041] [2021-08-21 19:03:16,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347042041] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:16,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:16,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 19:03:16,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614342688] [2021-08-21 19:03:16,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 19:03:16,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 19:03:16,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:03:16,549 INFO L87 Difference]: Start difference. First operand 13240 states and 61507 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 19:03:17,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:17,119 INFO L93 Difference]: Finished difference Result 22513 states and 108375 transitions. [2021-08-21 19:03:17,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:17,120 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 19:03:17,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:17,442 INFO L225 Difference]: With dead ends: 22513 [2021-08-21 19:03:17,442 INFO L226 Difference]: Without dead ends: 21204 [2021-08-21 19:03:17,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:03:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21204 states. [2021-08-21 19:03:18,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21204 to 16164. [2021-08-21 19:03:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16164 states, 15558 states have (on average 4.94459442087672) internal successors, (76928), 16163 states have internal predecessors, (76928), 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 19:03:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16164 states to 16164 states and 76928 transitions. [2021-08-21 19:03:18,391 INFO L78 Accepts]: Start accepts. Automaton has 16164 states and 76928 transitions. Word has length 13 [2021-08-21 19:03:18,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:18,399 INFO L470 AbstractCegarLoop]: Abstraction has 16164 states and 76928 transitions. [2021-08-21 19:03:18,399 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 19:03:18,399 INFO L276 IsEmpty]: Start isEmpty. Operand 16164 states and 76928 transitions. [2021-08-21 19:03:18,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 19:03:18,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:18,409 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:18,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 19:03:18,409 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:18,411 INFO L82 PathProgramCache]: Analyzing trace with hash 966342633, now seen corresponding path program 1 times [2021-08-21 19:03:18,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:18,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016167190] [2021-08-21 19:03:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:18,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:18,533 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 19:03:18,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:18,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016167190] [2021-08-21 19:03:18,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016167190] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:18,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:18,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:03:18,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280849298] [2021-08-21 19:03:18,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:18,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:18,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:18,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:18,536 INFO L87 Difference]: Start difference. First operand 16164 states and 76928 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 19:03:19,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:19,065 INFO L93 Difference]: Finished difference Result 21258 states and 97415 transitions. [2021-08-21 19:03:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:19,066 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 19:03:19,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:19,207 INFO L225 Difference]: With dead ends: 21258 [2021-08-21 19:03:19,208 INFO L226 Difference]: Without dead ends: 18982 [2021-08-21 19:03:19,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18982 states. [2021-08-21 19:03:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18982 to 17715. [2021-08-21 19:03:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17715 states, 17109 states have (on average 4.953240984277281) internal successors, (84745), 17714 states have internal predecessors, (84745), 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 19:03:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17715 states to 17715 states and 84745 transitions. [2021-08-21 19:03:19,975 INFO L78 Accepts]: Start accepts. Automaton has 17715 states and 84745 transitions. Word has length 16 [2021-08-21 19:03:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:19,975 INFO L470 AbstractCegarLoop]: Abstraction has 17715 states and 84745 transitions. [2021-08-21 19:03:19,975 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 19:03:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 17715 states and 84745 transitions. [2021-08-21 19:03:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 19:03:19,990 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:19,991 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:19,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 19:03:19,992 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:19,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:19,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1181158347, now seen corresponding path program 2 times [2021-08-21 19:03:19,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:19,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004969833] [2021-08-21 19:03:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:19,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:20,386 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 19:03:20,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:20,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004969833] [2021-08-21 19:03:20,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004969833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:20,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436472314] [2021-08-21 19:03:20,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:20,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:20,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:20,406 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 19:03:20,443 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 19:03:20,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:20,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:20,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 19:03:20,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:20,663 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 19:03:20,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436472314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:20,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:20,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 19:03:20,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164096452] [2021-08-21 19:03:20,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 19:03:20,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 19:03:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 19:03:20,667 INFO L87 Difference]: Start difference. First operand 17715 states and 84745 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 19:03:21,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:21,141 INFO L93 Difference]: Finished difference Result 25610 states and 126659 transitions. [2021-08-21 19:03:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 19:03:21,142 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 19:03:21,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:21,602 INFO L225 Difference]: With dead ends: 25610 [2021-08-21 19:03:21,602 INFO L226 Difference]: Without dead ends: 24014 [2021-08-21 19:03:21,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 19:03:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24014 states. [2021-08-21 19:03:22,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24014 to 17466. [2021-08-21 19:03:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17466 states, 16863 states have (on average 5.012038190120382) internal successors, (84518), 17465 states have internal predecessors, (84518), 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 19:03:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17466 states to 17466 states and 84518 transitions. [2021-08-21 19:03:22,434 INFO L78 Accepts]: Start accepts. Automaton has 17466 states and 84518 transitions. Word has length 17 [2021-08-21 19:03:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:22,434 INFO L470 AbstractCegarLoop]: Abstraction has 17466 states and 84518 transitions. [2021-08-21 19:03:22,434 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 19:03:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 17466 states and 84518 transitions. [2021-08-21 19:03:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 19:03:22,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:22,457 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 19:03:22,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 19:03:22,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:22,677 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:22,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:22,678 INFO L82 PathProgramCache]: Analyzing trace with hash 815042664, now seen corresponding path program 1 times [2021-08-21 19:03:22,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:22,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539764596] [2021-08-21 19:03:22,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:22,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:22,760 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 19:03:22,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:22,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539764596] [2021-08-21 19:03:22,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539764596] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:22,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:22,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:03:22,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145456511] [2021-08-21 19:03:22,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:03:22,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:22,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:03:22,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:22,762 INFO L87 Difference]: Start difference. First operand 17466 states and 84518 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 19:03:23,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:23,346 INFO L93 Difference]: Finished difference Result 24267 states and 114024 transitions. [2021-08-21 19:03:23,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:23,347 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 19:03:23,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:23,449 INFO L225 Difference]: With dead ends: 24267 [2021-08-21 19:03:23,450 INFO L226 Difference]: Without dead ends: 21433 [2021-08-21 19:03:23,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21433 states. [2021-08-21 19:03:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21433 to 19809. [2021-08-21 19:03:24,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19809 states, 19206 states have (on average 5.055451421430803) internal successors, (97095), 19808 states have internal predecessors, (97095), 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 19:03:24,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19809 states to 19809 states and 97095 transitions. [2021-08-21 19:03:24,221 INFO L78 Accepts]: Start accepts. Automaton has 19809 states and 97095 transitions. Word has length 19 [2021-08-21 19:03:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:24,221 INFO L470 AbstractCegarLoop]: Abstraction has 19809 states and 97095 transitions. [2021-08-21 19:03:24,222 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 19:03:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand 19809 states and 97095 transitions. [2021-08-21 19:03:24,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 19:03:24,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:24,238 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 19:03:24,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 19:03:24,239 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:24,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:24,239 INFO L82 PathProgramCache]: Analyzing trace with hash -773419074, now seen corresponding path program 2 times [2021-08-21 19:03:24,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:24,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498402623] [2021-08-21 19:03:24,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:24,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:24,352 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 19:03:24,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:24,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498402623] [2021-08-21 19:03:24,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498402623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:24,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604396920] [2021-08-21 19:03:24,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:24,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:24,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:24,355 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 19:03:24,384 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 19:03:24,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:24,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 19:03:24,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:24,630 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 19:03:24,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604396920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:24,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:24,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 19:03:24,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15648841] [2021-08-21 19:03:24,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 19:03:24,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:24,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 19:03:24,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 19:03:24,633 INFO L87 Difference]: Start difference. First operand 19809 states and 97095 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 19:03:25,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:25,334 INFO L93 Difference]: Finished difference Result 26037 states and 129907 transitions. [2021-08-21 19:03:25,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:25,335 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 19:03:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:25,444 INFO L225 Difference]: With dead ends: 26037 [2021-08-21 19:03:25,444 INFO L226 Difference]: Without dead ends: 23293 [2021-08-21 19:03:25,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 19:03:25,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23293 states. [2021-08-21 19:03:26,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23293 to 16872. [2021-08-21 19:03:26,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16872 states, 16278 states have (on average 5.037228160707704) internal successors, (81996), 16871 states have internal predecessors, (81996), 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 19:03:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16872 states to 16872 states and 81996 transitions. [2021-08-21 19:03:26,175 INFO L78 Accepts]: Start accepts. Automaton has 16872 states and 81996 transitions. Word has length 20 [2021-08-21 19:03:26,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:26,176 INFO L470 AbstractCegarLoop]: Abstraction has 16872 states and 81996 transitions. [2021-08-21 19:03:26,176 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 19:03:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 16872 states and 81996 transitions. [2021-08-21 19:03:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 19:03:26,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:26,197 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 19:03:26,220 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 19:03:26,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-21 19:03:26,399 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:26,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1987587173, now seen corresponding path program 1 times [2021-08-21 19:03:26,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:26,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545976485] [2021-08-21 19:03:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:26,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:26,552 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 19:03:26,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:26,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545976485] [2021-08-21 19:03:26,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545976485] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:26,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:26,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 19:03:26,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843619442] [2021-08-21 19:03:26,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 19:03:26,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:26,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 19:03:26,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:03:26,554 INFO L87 Difference]: Start difference. First operand 16872 states and 81996 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 19:03:27,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:27,206 INFO L93 Difference]: Finished difference Result 24011 states and 114261 transitions. [2021-08-21 19:03:27,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 19:03:27,207 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 19:03:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:27,299 INFO L225 Difference]: With dead ends: 24011 [2021-08-21 19:03:27,299 INFO L226 Difference]: Without dead ends: 21013 [2021-08-21 19:03:27,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:03:27,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21013 states. [2021-08-21 19:03:27,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21013 to 19339. [2021-08-21 19:03:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19339 states, 18745 states have (on average 5.111496399039744) internal successors, (95815), 19338 states have internal predecessors, (95815), 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 19:03:28,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19339 states to 19339 states and 95815 transitions. [2021-08-21 19:03:28,111 INFO L78 Accepts]: Start accepts. Automaton has 19339 states and 95815 transitions. Word has length 22 [2021-08-21 19:03:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:28,112 INFO L470 AbstractCegarLoop]: Abstraction has 19339 states and 95815 transitions. [2021-08-21 19:03:28,112 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 19:03:28,112 INFO L276 IsEmpty]: Start isEmpty. Operand 19339 states and 95815 transitions. [2021-08-21 19:03:28,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 19:03:28,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:28,135 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 19:03:28,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 19:03:28,135 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:28,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:28,136 INFO L82 PathProgramCache]: Analyzing trace with hash -569174315, now seen corresponding path program 2 times [2021-08-21 19:03:28,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:28,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087979423] [2021-08-21 19:03:28,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:28,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:28,272 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 19:03:28,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:28,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087979423] [2021-08-21 19:03:28,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087979423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:28,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378890750] [2021-08-21 19:03:28,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:28,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:28,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:28,275 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 19:03:28,278 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 19:03:28,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:28,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:28,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 19:03:28,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:28,805 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 19:03:28,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378890750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:28,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:28,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 19:03:28,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404936685] [2021-08-21 19:03:28,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 19:03:28,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:28,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 19:03:28,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-21 19:03:28,806 INFO L87 Difference]: Start difference. First operand 19339 states and 95815 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 19:03:29,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:29,200 INFO L93 Difference]: Finished difference Result 22796 states and 113853 transitions. [2021-08-21 19:03:29,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 19:03:29,201 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 19:03:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:29,287 INFO L225 Difference]: With dead ends: 22796 [2021-08-21 19:03:29,288 INFO L226 Difference]: Without dead ends: 18976 [2021-08-21 19:03:29,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-21 19:03:29,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18976 states. [2021-08-21 19:03:29,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18976 to 14174. [2021-08-21 19:03:29,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14174 states, 13607 states have (on average 5.031601381641802) internal successors, (68465), 14173 states have internal predecessors, (68465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14174 states to 14174 states and 68465 transitions. [2021-08-21 19:03:29,879 INFO L78 Accepts]: Start accepts. Automaton has 14174 states and 68465 transitions. Word has length 23 [2021-08-21 19:03:29,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:29,880 INFO L470 AbstractCegarLoop]: Abstraction has 14174 states and 68465 transitions. [2021-08-21 19:03:29,880 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 19:03:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 14174 states and 68465 transitions. [2021-08-21 19:03:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 19:03:29,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:29,896 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 19:03:29,914 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 19:03:30,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:30,100 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:30,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2088572028, now seen corresponding path program 1 times [2021-08-21 19:03:30,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:30,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100430231] [2021-08-21 19:03:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:30,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 19:03:30,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:30,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100430231] [2021-08-21 19:03:30,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100430231] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:30,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:30,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 19:03:30,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259446512] [2021-08-21 19:03:30,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:03:30,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:03:30,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:30,244 INFO L87 Difference]: Start difference. First operand 14174 states and 68465 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 19:03:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:30,841 INFO L93 Difference]: Finished difference Result 20416 states and 97488 transitions. [2021-08-21 19:03:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:30,841 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 19:03:30,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:30,913 INFO L225 Difference]: With dead ends: 20416 [2021-08-21 19:03:30,913 INFO L226 Difference]: Without dead ends: 17528 [2021-08-21 19:03:30,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:30,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17528 states. [2021-08-21 19:03:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17528 to 16072. [2021-08-21 19:03:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16072 states, 15505 states have (on average 5.144469525959368) internal successors, (79765), 16071 states have internal predecessors, (79765), 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 19:03:31,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16072 states to 16072 states and 79765 transitions. [2021-08-21 19:03:31,541 INFO L78 Accepts]: Start accepts. Automaton has 16072 states and 79765 transitions. Word has length 25 [2021-08-21 19:03:31,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:31,541 INFO L470 AbstractCegarLoop]: Abstraction has 16072 states and 79765 transitions. [2021-08-21 19:03:31,541 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 19:03:31,541 INFO L276 IsEmpty]: Start isEmpty. Operand 16072 states and 79765 transitions. [2021-08-21 19:03:31,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 19:03:31,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:31,560 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 19:03:31,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 19:03:31,561 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:31,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:31,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1237709332, now seen corresponding path program 2 times [2021-08-21 19:03:31,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:31,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688396097] [2021-08-21 19:03:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:31,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:31,715 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 19:03:31,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:31,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688396097] [2021-08-21 19:03:31,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688396097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:31,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494269329] [2021-08-21 19:03:31,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:31,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:31,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:31,717 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 19:03:31,717 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 19:03:31,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:31,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:31,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 19:03:31,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:32,068 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 19:03:32,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494269329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:32,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:32,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 19:03:32,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589722673] [2021-08-21 19:03:32,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 19:03:32,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:32,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 19:03:32,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-21 19:03:32,070 INFO L87 Difference]: Start difference. First operand 16072 states and 79765 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 19:03:32,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:32,707 INFO L93 Difference]: Finished difference Result 16321 states and 81745 transitions. [2021-08-21 19:03:32,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 19:03:32,708 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 19:03:32,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:32,778 INFO L225 Difference]: With dead ends: 16321 [2021-08-21 19:03:32,778 INFO L226 Difference]: Without dead ends: 12036 [2021-08-21 19:03:32,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-21 19:03:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12036 states. [2021-08-21 19:03:33,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12036 to 9620. [2021-08-21 19:03:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9620 states, 9134 states have (on average 5.049594920078826) internal successors, (46123), 9619 states have internal predecessors, (46123), 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 19:03:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9620 states to 9620 states and 46123 transitions. [2021-08-21 19:03:33,136 INFO L78 Accepts]: Start accepts. Automaton has 9620 states and 46123 transitions. Word has length 26 [2021-08-21 19:03:33,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:33,136 INFO L470 AbstractCegarLoop]: Abstraction has 9620 states and 46123 transitions. [2021-08-21 19:03:33,137 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 19:03:33,137 INFO L276 IsEmpty]: Start isEmpty. Operand 9620 states and 46123 transitions. [2021-08-21 19:03:33,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 19:03:33,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:33,153 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 19:03:33,176 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 19:03:33,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:33,375 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:33,376 INFO L82 PathProgramCache]: Analyzing trace with hash 811261477, now seen corresponding path program 1 times [2021-08-21 19:03:33,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:33,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417364339] [2021-08-21 19:03:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:33,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:33,665 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 19:03:33,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:33,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417364339] [2021-08-21 19:03:33,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417364339] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:33,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:33,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 19:03:33,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256353704] [2021-08-21 19:03:33,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 19:03:33,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:33,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 19:03:33,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 19:03:33,667 INFO L87 Difference]: Start difference. First operand 9620 states and 46123 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 19:03:34,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:34,160 INFO L93 Difference]: Finished difference Result 9620 states and 46059 transitions. [2021-08-21 19:03:34,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 19:03:34,161 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 19:03:34,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:34,189 INFO L225 Difference]: With dead ends: 9620 [2021-08-21 19:03:34,189 INFO L226 Difference]: Without dead ends: 7164 [2021-08-21 19:03:34,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 19:03:34,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7164 states. [2021-08-21 19:03:34,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7164 to 7164. [2021-08-21 19:03:34,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7164 states, 6678 states have (on average 5.1380652890086855) internal successors, (34312), 7163 states have internal predecessors, (34312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7164 states to 7164 states and 34312 transitions. [2021-08-21 19:03:34,371 INFO L78 Accepts]: Start accepts. Automaton has 7164 states and 34312 transitions. Word has length 28 [2021-08-21 19:03:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:34,371 INFO L470 AbstractCegarLoop]: Abstraction has 7164 states and 34312 transitions. [2021-08-21 19:03:34,372 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 19:03:34,372 INFO L276 IsEmpty]: Start isEmpty. Operand 7164 states and 34312 transitions. [2021-08-21 19:03:34,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 19:03:34,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:34,382 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 19:03:34,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 19:03:34,382 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:34,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:34,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1988898060, now seen corresponding path program 2 times [2021-08-21 19:03:34,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:34,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385918068] [2021-08-21 19:03:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:34,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:34,590 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 19:03:34,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:34,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385918068] [2021-08-21 19:03:34,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385918068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:34,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492251699] [2021-08-21 19:03:34,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:34,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:34,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:34,592 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 19:03:34,593 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 19:03:34,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:34,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:34,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 19:03:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:34,915 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 19:03:34,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492251699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:34,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:34,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 19:03:34,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805138220] [2021-08-21 19:03:34,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 19:03:34,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:34,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 19:03:34,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-08-21 19:03:34,917 INFO L87 Difference]: Start difference. First operand 7164 states and 34312 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 19:03:35,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:35,157 INFO L93 Difference]: Finished difference Result 3890 states and 20691 transitions. [2021-08-21 19:03:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 19:03:35,158 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 19:03:35,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:35,158 INFO L225 Difference]: With dead ends: 3890 [2021-08-21 19:03:35,158 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 19:03:35,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-08-21 19:03:35,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 19:03:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 19:03:35,159 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 19:03:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 19:03:35,159 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-08-21 19:03:35,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:35,159 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 19:03:35,159 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 19:03:35,159 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 19:03:35,159 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 19:03:35,161 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ServerThreadErr0ASSERT_VIOLATIONASSERT [2021-08-21 19:03:35,161 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 19:03:35,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 19:03:35,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 19:03:35,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 19:03:35,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4INUSE_VIOLATION [2021-08-21 19:03:35,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5INUSE_VIOLATION [2021-08-21 19:03:35,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6INUSE_VIOLATION [2021-08-21 19:03:35,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ServerThreadErr0ASSERT_VIOLATIONASSERT [2021-08-21 19:03:35,178 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 19:03:35,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 19:03:35,367 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 19:03:35,367 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 19:03:35,369 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:03:35 BasicIcfg [2021-08-21 19:03:35,369 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 19:03:35,370 INFO L168 Benchmark]: Toolchain (without parser) took 26130.91 ms. Allocated memory was 191.9 MB in the beginning and 6.9 GB in the end (delta: 6.7 GB). Free memory was 171.6 MB in the beginning and 5.3 GB in the end (delta: -5.2 GB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. [2021-08-21 19:03:35,370 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.49 ms. Allocated memory is still 191.9 MB. Free memory is still 172.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 19:03:35,371 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.72 ms. Allocated memory is still 191.9 MB. Free memory was 171.4 MB in the beginning and 169.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:35,371 INFO L168 Benchmark]: Boogie Preprocessor took 16.57 ms. Allocated memory is still 191.9 MB. Free memory was 169.6 MB in the beginning and 168.7 MB in the end (delta: 929.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:35,371 INFO L168 Benchmark]: RCFGBuilder took 267.13 ms. Allocated memory is still 191.9 MB. Free memory was 168.7 MB in the beginning and 155.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:35,371 INFO L168 Benchmark]: TraceAbstraction took 25805.84 ms. Allocated memory was 191.9 MB in the beginning and 6.9 GB in the end (delta: 6.7 GB). Free memory was 155.0 MB in the beginning and 5.3 GB in the end (delta: -5.2 GB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. [2021-08-21 19:03:35,372 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 0.49 ms. Allocated memory is still 191.9 MB. Free memory is still 172.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.72 ms. Allocated memory is still 191.9 MB. Free memory was 171.4 MB in the beginning and 169.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.57 ms. Allocated memory is still 191.9 MB. Free memory was 169.6 MB in the beginning and 168.7 MB in the end (delta: 929.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 267.13 ms. Allocated memory is still 191.9 MB. Free memory was 168.7 MB in the beginning and 155.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 25805.84 ms. Allocated memory was 191.9 MB in the beginning and 6.9 GB in the end (delta: 6.7 GB). Free memory was 155.0 MB in the beginning and 5.3 GB in the end (delta: -5.2 GB). Peak memory consumption was 1.6 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: 208440, positive: 152445, positive conditional: 152445, positive unconditional: 0, negative: 55995, negative conditional: 55995, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 192321, positive: 152445, positive conditional: 0, positive unconditional: 152445, negative: 39876, negative conditional: 0, negative unconditional: 39876, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 507, positive: 397, positive conditional: 0, positive unconditional: 397, negative: 110, negative conditional: 0, negative unconditional: 110, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 507, positive: 351, positive conditional: 0, positive unconditional: 351, negative: 156, negative conditional: 0, negative unconditional: 156, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 156, positive: 46, positive conditional: 0, positive unconditional: 46, negative: 110, negative conditional: 0, negative unconditional: 110, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 462, positive: 236, positive conditional: 0, positive unconditional: 236, negative: 226, negative conditional: 0, negative unconditional: 226, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 192321, positive: 152048, positive conditional: 0, positive unconditional: 152048, negative: 39766, negative conditional: 0, negative unconditional: 39766, unknown: 507, unknown conditional: 0, unknown unconditional: 507] , Statistics on independence cache: Total cache size (in pairs): 507, Positive cache size: 397, Positive conditional cache size: 0, Positive unconditional cache size: 397, Negative cache size: 110, Negative conditional cache size: 0, Negative unconditional cache size: 110, Independence queries for same thread: 16119 - 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: 75]: 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 10 procedures, 57 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 25707.3ms, OverallIterations: 13, TraceHistogramMax: 2, EmptinessCheckTime: 237.0ms, AutomataDifference: 8916.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2674.1ms, PartialOrderReductionTime: 2646.8ms, HoareTripleCheckerStatistics: 642 SDtfs, 954 SDslu, 2372 SDs, 0 SdLazy, 3585 SolverSat, 683 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2322.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 237 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 684.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=19809occurred in iteration=6, InterpolantAutomatonStates: 103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8962.8ms AutomataMinimizationTime, 13 MinimizatonAttempts, 33662 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 41.9ms SsaConstructionTime, 151.4ms SatisfiabilityAnalysisTime, 2923.6ms InterpolantComputationTime, 375 NumberOfCodeBlocks, 375 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 357 ConstructedInterpolants, 0 QuantifiedInterpolants, 1963 SizeOfPredicates, 10 NumberOfNonLiveVariables, 255 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 18 InterpolantComputations, 8 PerfectInterpolantSequences, 0/10 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 19:03:35,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...