/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-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth03-incorrect.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d310483fe8b4879eee5de19363f50e4b839cc4ec-d310483 [2021-06-24 18:22:08,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-24 18:22:08,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-24 18:22:08,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-24 18:22:08,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-24 18:22:08,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-24 18:22:08,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-24 18:22:08,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-24 18:22:08,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-24 18:22:08,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-24 18:22:08,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-24 18:22:08,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-24 18:22:08,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-24 18:22:08,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-24 18:22:08,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-24 18:22:08,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-24 18:22:08,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-24 18:22:08,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-24 18:22:08,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-24 18:22:08,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-24 18:22:08,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-24 18:22:08,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-24 18:22:08,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-24 18:22:08,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-24 18:22:08,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-24 18:22:08,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-24 18:22:08,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-24 18:22:08,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-24 18:22:08,358 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-PN-NoLbe.epf [2021-06-24 18:22:08,397 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-24 18:22:08,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-24 18:22:08,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-24 18:22:08,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-24 18:22:08,400 INFO L138 SettingsManager]: * Use SBE=true [2021-06-24 18:22:08,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-24 18:22:08,400 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-24 18:22:08,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-24 18:22:08,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-24 18:22:08,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-24 18:22:08,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-24 18:22:08,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-24 18:22:08,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-24 18:22:08,402 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-24 18:22:08,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-24 18:22:08,402 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-24 18:22:08,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-24 18:22:08,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-24 18:22:08,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-24 18:22:08,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-24 18:22:08,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-24 18:22:08,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 18:22:08,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-24 18:22:08,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-24 18:22:08,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-24 18:22:08,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-24 18:22:08,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-24 18:22:08,405 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-24 18:22:08,405 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-24 18:22:08,405 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-24 18:22:08,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-24 18:22:08,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-24 18:22:08,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-24 18:22:08,738 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-24 18:22:08,739 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-24 18:22:08,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth03-incorrect.bpl [2021-06-24 18:22:08,740 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth03-incorrect.bpl' [2021-06-24 18:22:08,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-24 18:22:08,765 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-24 18:22:08,766 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-24 18:22:08,766 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-24 18:22:08,766 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-24 18:22:08,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-24 18:22:08,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-24 18:22:08,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-24 18:22:08,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-24 18:22:08,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-24 18:22:08,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-24 18:22:08,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-24 18:22:08,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-24 18:22:08,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 18:22:08,905 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-06-24 18:22:08,905 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-06-24 18:22:08,906 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-06-24 18:22:08,906 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-06-24 18:22:08,906 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-06-24 18:22:08,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-06-24 18:22:08,906 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-24 18:22:08,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-24 18:22:08,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-24 18:22:08,908 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-24 18:22:09,170 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-24 18:22:09,171 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-06-24 18:22:09,173 INFO L202 PluginConnector]: Adding new model bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:22:09 BoogieIcfgContainer [2021-06-24 18:22:09,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-24 18:22:09,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-24 18:22:09,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-24 18:22:09,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-24 18:22:09,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/2) ... [2021-06-24 18:22:09,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cacc4e5 and model type bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 06:22:09, skipping insertion in model container [2021-06-24 18:22:09,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:22:09" (2/2) ... [2021-06-24 18:22:09,180 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth03-incorrect.bpl [2021-06-24 18:22:09,185 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-24 18:22:09,185 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-24 18:22:09,186 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-24 18:22:09,254 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-24 18:22:09,292 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-24 18:22:09,337 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:22:09,337 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:22:09,337 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:22:09,337 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:22:09,337 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:22:09,337 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:22:09,337 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:22:09,338 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-24 18:22:09,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 46 places, 36 transitions, 92 flow [2021-06-24 18:22:09,394 INFO L129 PetriNetUnfolder]: 3/32 cut-off events. [2021-06-24 18:22:09,394 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,398 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 3/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 81 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2021-06-24 18:22:09,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 36 transitions, 92 flow [2021-06-24 18:22:09,401 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions, 0 flow [2021-06-24 18:22:09,401 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-06-24 18:22:09,401 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,402 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/4) [2021-06-24 18:22:09,404 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:22:09,422 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:22:09,422 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:22:09,422 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:22:09,422 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:22:09,422 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:22:09,423 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:22:09,423 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:22:09,423 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork2======== [2021-06-24 18:22:09,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 46 places, 36 transitions, 92 flow [2021-06-24 18:22:09,439 INFO L129 PetriNetUnfolder]: 3/32 cut-off events. [2021-06-24 18:22:09,440 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 3/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 81 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2021-06-24 18:22:09,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 36 transitions, 92 flow [2021-06-24 18:22:09,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 76 flow [2021-06-24 18:22:09,458 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-06-24 18:22:09,458 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,459 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:09,459 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:09,460 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:09,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:09,465 INFO L82 PathProgramCache]: Analyzing trace with hash -360861356, now seen corresponding path program 1 times [2021-06-24 18:22:09,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:09,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87408905] [2021-06-24 18:22:09,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:09,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,594 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,594 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:09,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:09,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87408905] [2021-06-24 18:22:09,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87408905] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:09,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:09,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:22:09,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86093509] [2021-06-24 18:22:09,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:09,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:09,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:09,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:09,635 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 36 [2021-06-24 18:22:09,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-06-24 18:22:09,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:09,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 36 [2021-06-24 18:22:09,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:09,774 INFO L129 PetriNetUnfolder]: 62/212 cut-off events. [2021-06-24 18:22:09,775 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 212 events. 62/212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1098 event pairs, 21 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 319. Up to 72 conditions per place. [2021-06-24 18:22:09,783 INFO L132 encePairwiseOnDemand]: 28/36 looper letters, 6 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2021-06-24 18:22:09,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 104 flow [2021-06-24 18:22:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2021-06-24 18:22:09,796 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9074074074074074 [2021-06-24 18:22:09,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2021-06-24 18:22:09,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2021-06-24 18:22:09,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:09,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2021-06-24 18:22:09,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2021-06-24 18:22:09,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2021-06-24 18:22:09,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2021-06-24 18:22:09,813 INFO L185 Difference]: Start difference. First operand has 42 places, 32 transitions, 76 flow. Second operand 3 states and 98 transitions. [2021-06-24 18:22:09,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 104 flow [2021-06-24 18:22:09,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-24 18:22:09,825 INFO L241 Difference]: Finished difference. Result has 42 places, 35 transitions, 110 flow [2021-06-24 18:22:09,827 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2021-06-24 18:22:09,828 INFO L335 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2021-06-24 18:22:09,828 INFO L482 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 110 flow [2021-06-24 18:22:09,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-06-24 18:22:09,828 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:09,829 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:09,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-24 18:22:09,829 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:09,830 INFO L82 PathProgramCache]: Analyzing trace with hash 668481810, now seen corresponding path program 1 times [2021-06-24 18:22:09,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:09,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760738103] [2021-06-24 18:22:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:09,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:09,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:09,884 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,885 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:09,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:09,903 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,904 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:09,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:09,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760738103] [2021-06-24 18:22:09,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760738103] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:09,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:09,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:22:09,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666577527] [2021-06-24 18:22:09,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:22:09,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:09,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:22:09,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:22:09,911 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 36 [2021-06-24 18:22:09,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 110 flow. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 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) [2021-06-24 18:22:09,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:09,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 36 [2021-06-24 18:22:09,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:09,982 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([74] L45-->L40: Formula: (= v_pendingIo_1 (+ v_pendingIo_2 1)) InVars {pendingIo=v_pendingIo_2} OutVars{pendingIo=v_pendingIo_1} AuxVars[] AssignedVars[pendingIo][29], [DeviceThreadThread1of1ForFork3InUse, 17#L69true, 51#(not stopped), 36#L40true, Black: 49#true, 21#ULTIMATE.startFINALtrue, 6#L54-2true, 55#true, DeviceThreadThread1of1ForFork1InUse, 10#L54-2true, ServerThreadThread1of1ForFork0InUse, DeviceThreadThread1of1ForFork2InUse]) [2021-06-24 18:22:09,983 INFO L384 tUnfolder$Statistics]: this new event has 17 ancestors and is cut-off event [2021-06-24 18:22:09,983 INFO L387 tUnfolder$Statistics]: existing Event has 13 ancestors and is cut-off event [2021-06-24 18:22:09,983 INFO L387 tUnfolder$Statistics]: existing Event has 17 ancestors and is cut-off event [2021-06-24 18:22:09,983 INFO L387 tUnfolder$Statistics]: existing Event has 17 ancestors and is cut-off event [2021-06-24 18:22:09,983 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([74] L45-->L40: Formula: (= v_pendingIo_1 (+ v_pendingIo_2 1)) InVars {pendingIo=v_pendingIo_2} OutVars{pendingIo=v_pendingIo_1} AuxVars[] AssignedVars[pendingIo][29], [DeviceThreadThread1of1ForFork3InUse, 51#(not stopped), 36#L40true, Black: 49#true, 21#ULTIMATE.startFINALtrue, 6#L54-2true, 55#true, DeviceThreadThread1of1ForFork1InUse, 10#L54-2true, ServerThreadThread1of1ForFork0InUse, 28#L77-2true, DeviceThreadThread1of1ForFork2InUse]) [2021-06-24 18:22:09,983 INFO L384 tUnfolder$Statistics]: this new event has 16 ancestors and is cut-off event [2021-06-24 18:22:09,983 INFO L387 tUnfolder$Statistics]: existing Event has 12 ancestors and is cut-off event [2021-06-24 18:22:09,984 INFO L387 tUnfolder$Statistics]: existing Event has 16 ancestors and is cut-off event [2021-06-24 18:22:09,984 INFO L387 tUnfolder$Statistics]: existing Event has 16 ancestors and is cut-off event [2021-06-24 18:22:10,094 INFO L129 PetriNetUnfolder]: 504/995 cut-off events. [2021-06-24 18:22:10,094 INFO L130 PetriNetUnfolder]: For 58/61 co-relation queries the response was YES. [2021-06-24 18:22:10,099 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1913 conditions, 995 events. 504/995 cut-off events. For 58/61 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5914 event pairs, 158 based on Foata normal form. 30/896 useless extension candidates. Maximal degree in co-relation 1898. Up to 396 conditions per place. [2021-06-24 18:22:10,109 INFO L132 encePairwiseOnDemand]: 26/36 looper letters, 11 selfloop transitions, 13 changer transitions 0/49 dead transitions. [2021-06-24 18:22:10,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 186 flow [2021-06-24 18:22:10,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:22:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-24 18:22:10,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2021-06-24 18:22:10,115 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2021-06-24 18:22:10,116 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 156 transitions. [2021-06-24 18:22:10,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 156 transitions. [2021-06-24 18:22:10,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:10,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 156 transitions. [2021-06-24 18:22:10,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-06-24 18:22:10,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 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) [2021-06-24 18:22:10,123 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 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) [2021-06-24 18:22:10,123 INFO L185 Difference]: Start difference. First operand has 42 places, 35 transitions, 110 flow. Second operand 5 states and 156 transitions. [2021-06-24 18:22:10,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 186 flow [2021-06-24 18:22:10,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:10,137 INFO L241 Difference]: Finished difference. Result has 46 places, 46 transitions, 185 flow [2021-06-24 18:22:10,138 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2021-06-24 18:22:10,138 INFO L335 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2021-06-24 18:22:10,139 INFO L482 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 185 flow [2021-06-24 18:22:10,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 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) [2021-06-24 18:22:10,139 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:10,139 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:10,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-24 18:22:10,140 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:10,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:10,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1770311826, now seen corresponding path program 2 times [2021-06-24 18:22:10,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:10,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499540446] [2021-06-24 18:22:10,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:10,175 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,182 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:10,193 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:10,202 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,202 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:10,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:10,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499540446] [2021-06-24 18:22:10,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499540446] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:10,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:10,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:22:10,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963365309] [2021-06-24 18:22:10,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:10,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:10,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:10,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:10,209 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 36 [2021-06-24 18:22:10,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-06-24 18:22:10,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:10,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 36 [2021-06-24 18:22:10,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:10,355 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([72] L54-2-->L45: Formula: (not v_stoppingFlag_1) InVars {stoppingFlag=v_stoppingFlag_1} OutVars{stoppingFlag=v_stoppingFlag_1} AuxVars[] AssignedVars[][20], [64#true, 4#L45true, 38#L45true, 40#L45true, DeviceThreadThread1of1ForFork1InUse, ServerThreadThread1of1ForFork0InUse, DeviceThreadThread1of1ForFork2InUse, DeviceThreadThread1of1ForFork3InUse, 19#ServerThreadENTRYtrue, Black: 49#true, 21#ULTIMATE.startFINALtrue, 55#true, Black: 58#(and (<= 1 pendingIo) (not stoppingEvent)), Black: 59#(and (not stoppingEvent) (<= 2 pendingIo))]) [2021-06-24 18:22:10,356 INFO L384 tUnfolder$Statistics]: this new event has 27 ancestors and is cut-off event [2021-06-24 18:22:10,356 INFO L387 tUnfolder$Statistics]: existing Event has 19 ancestors and is cut-off event [2021-06-24 18:22:10,356 INFO L387 tUnfolder$Statistics]: existing Event has 19 ancestors and is cut-off event [2021-06-24 18:22:10,358 INFO L387 tUnfolder$Statistics]: existing Event has 19 ancestors and is cut-off event [2021-06-24 18:22:10,361 INFO L129 PetriNetUnfolder]: 551/1345 cut-off events. [2021-06-24 18:22:10,362 INFO L130 PetriNetUnfolder]: For 121/124 co-relation queries the response was YES. [2021-06-24 18:22:10,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2878 conditions, 1345 events. 551/1345 cut-off events. For 121/124 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9681 event pairs, 159 based on Foata normal form. 127/1312 useless extension candidates. Maximal degree in co-relation 2861. Up to 354 conditions per place. [2021-06-24 18:22:10,378 INFO L132 encePairwiseOnDemand]: 32/36 looper letters, 4 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2021-06-24 18:22:10,378 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 195 flow [2021-06-24 18:22:10,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2021-06-24 18:22:10,381 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9351851851851852 [2021-06-24 18:22:10,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 101 transitions. [2021-06-24 18:22:10,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 101 transitions. [2021-06-24 18:22:10,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:10,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 101 transitions. [2021-06-24 18:22:10,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2021-06-24 18:22:10,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2021-06-24 18:22:10,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2021-06-24 18:22:10,384 INFO L185 Difference]: Start difference. First operand has 46 places, 46 transitions, 185 flow. Second operand 3 states and 101 transitions. [2021-06-24 18:22:10,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 195 flow [2021-06-24 18:22:10,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 193 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:10,389 INFO L241 Difference]: Finished difference. Result has 48 places, 46 transitions, 192 flow [2021-06-24 18:22:10,390 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2021-06-24 18:22:10,390 INFO L335 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2021-06-24 18:22:10,390 INFO L482 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 192 flow [2021-06-24 18:22:10,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-06-24 18:22:10,390 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:10,390 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:10,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-24 18:22:10,391 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:10,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:10,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1127501910, now seen corresponding path program 3 times [2021-06-24 18:22:10,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:10,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53191766] [2021-06-24 18:22:10,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-24 18:22:10,410 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-24 18:22:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-24 18:22:10,426 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-24 18:22:10,443 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-24 18:22:10,443 INFO L605 BasicCegarLoop]: Counterexample might be feasible [2021-06-24 18:22:10,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-24 18:22:10,443 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork2 was UNSAFE (2/4) [2021-06-24 18:22:10,445 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-24 18:22:10,476 INFO L202 PluginConnector]: Adding new model bluetooth03-incorrect.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 06:22:10 BasicIcfg [2021-06-24 18:22:10,476 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-24 18:22:10,477 INFO L168 Benchmark]: Toolchain (without parser) took 1711.93 ms. Allocated memory is still 184.5 MB. Free memory was 164.1 MB in the beginning and 168.8 MB in the end (delta: -4.8 MB). Peak memory consumption was 103.2 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:10,478 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 184.5 MB. Free memory is still 165.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-24 18:22:10,479 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.59 ms. Allocated memory is still 184.5 MB. Free memory was 164.0 MB in the beginning and 162.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:10,479 INFO L168 Benchmark]: Boogie Preprocessor took 16.08 ms. Allocated memory is still 184.5 MB. Free memory was 162.2 MB in the beginning and 161.3 MB in the end (delta: 848.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:10,483 INFO L168 Benchmark]: RCFGBuilder took 354.92 ms. Allocated memory is still 184.5 MB. Free memory was 161.2 MB in the beginning and 148.7 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:10,484 INFO L168 Benchmark]: TraceAbstraction took 1301.35 ms. Allocated memory is still 184.5 MB. Free memory was 148.2 MB in the beginning and 168.8 MB in the end (delta: -20.6 MB). Peak memory consumption was 87.5 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:10,488 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 0.14 ms. Allocated memory is still 184.5 MB. Free memory is still 165.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 34.59 ms. Allocated memory is still 184.5 MB. Free memory was 164.0 MB in the beginning and 162.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.08 ms. Allocated memory is still 184.5 MB. Free memory was 162.2 MB in the beginning and 161.3 MB in the end (delta: 848.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 354.92 ms. Allocated memory is still 184.5 MB. Free memory was 161.2 MB in the beginning and 148.7 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1301.35 ms. Allocated memory is still 184.5 MB. Free memory was 148.2 MB in the beginning and 168.8 MB in the end (delta: -20.6 MB). Peak memory consumption was 87.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 34]: assertion can be violated assertion can be violated We found a FailurePath: [L13] 0 pendingIo := 1; VAL [pendingIo=1] [L14] 0 stopped := false; VAL [pendingIo=1, stopped=false] [L15] 0 stoppingEvent := false; VAL [pendingIo=1, stopped=false, stoppingEvent=false] [L16] 0 stoppingFlag := false; VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L18] FORK 0 fork 0 ServerThread(); VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L19] FORK 0 fork 1 DeviceThread(); VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L20] FORK 0 fork 2 DeviceThread(); VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L44] 3 assume !stoppingFlag; VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L66] 1 stoppingFlag := true; VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=true] [L76] 1 pendingIo := pendingIo - 1; [L77] COND TRUE 1 pendingIo == 0 [L78] 1 stoppingEvent := true; VAL [pendingIo=0, stopped=false, stoppingEvent=true, stoppingFlag=true] [L68] 1 assume stoppingEvent; VAL [pendingIo=0, stopped=false, stoppingEvent=true, stoppingFlag=true] [L69] 1 stopped := true; VAL [pendingIo=0, stopped=true, stoppingEvent=true, stoppingFlag=true] [L45] 3 pendingIo := pendingIo + 1; VAL [pendingIo=1, stopped=true, stoppingEvent=true, stoppingFlag=true] [L34] 3 assert !stopped; VAL [pendingIo=1, stopped=true, stoppingEvent=true, stoppingFlag=true] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 50 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 69.4ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 63.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadThread1of1ForFork2 with 1 thread instances CFG has 7 procedures, 50 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 16.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 1026.8ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 612.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 17 SDtfs, 3 SDslu, 5 SDs, 0 SdLazy, 40 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 57.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=192occurred in iteration=3, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 13.4ms SsaConstructionTime, 55.6ms SatisfiabilityAnalysisTime, 154.4ms InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 88 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...