/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/bluetooth-incorrect03.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-1c3aa5735269c4be989a50fc1da9ea7b9492ef29-1c3aa57 [2021-07-01 09:56:01,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-01 09:56:01,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-01 09:56:01,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-01 09:56:01,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-01 09:56:01,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-01 09:56:01,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-01 09:56:01,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-01 09:56:01,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-01 09:56:01,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-01 09:56:01,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-01 09:56:01,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-01 09:56:01,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-01 09:56:01,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-01 09:56:01,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-01 09:56:01,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-01 09:56:01,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-01 09:56:01,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-01 09:56:01,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-01 09:56:01,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-01 09:56:01,739 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 [2021-07-01 09:56:01,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-01 09:56:01,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-01 09:56:01,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-01 09:56:01,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-01 09:56:01,784 INFO L138 SettingsManager]: * Use SBE=true [2021-07-01 09:56:01,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-01 09:56:01,784 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-01 09:56:01,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-01 09:56:01,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-01 09:56:01,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-01 09:56:01,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-01 09:56:01,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-01 09:56:01,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-01 09:56:01,784 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-01 09:56:01,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-01 09:56:01,785 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-01 09:56:01,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-01 09:56:01,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-01 09:56:01,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-01 09:56:01,785 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-01 09:56:01,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-01 09:56:01,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-01 09:56:01,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-01 09:56:01,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-01 09:56:01,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-01 09:56:01,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-01 09:56:01,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-01 09:56:01,786 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-01 09:56:01,786 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-07-01 09:56:01,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-01 09:56:02,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-01 09:56:02,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-01 09:56:02,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-01 09:56:02,187 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-01 09:56:02,188 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-01 09:56:02,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-incorrect03.bpl [2021-07-01 09:56:02,189 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-incorrect03.bpl' [2021-07-01 09:56:02,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-01 09:56:02,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-01 09:56:02,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-01 09:56:02,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-01 09:56:02,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-01 09:56:02,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:56:02" (1/1) ... [2021-07-01 09:56:02,222 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:56:02" (1/1) ... [2021-07-01 09:56:02,232 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-01 09:56:02,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-01 09:56:02,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-01 09:56:02,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-01 09:56:02,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:56:02" (1/1) ... [2021-07-01 09:56:02,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:56:02" (1/1) ... [2021-07-01 09:56:02,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:56:02" (1/1) ... [2021-07-01 09:56:02,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:56:02" (1/1) ... [2021-07-01 09:56:02,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:56:02" (1/1) ... [2021-07-01 09:56:02,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:56:02" (1/1) ... [2021-07-01 09:56:02,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:56:02" (1/1) ... [2021-07-01 09:56:02,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-01 09:56:02,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-01 09:56:02,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-01 09:56:02,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-01 09:56:02,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:56:02" (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 [2021-07-01 09:56:02,291 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThreadWithAssert given in one single declaration [2021-07-01 09:56:02,291 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThreadWithAssert [2021-07-01 09:56:02,291 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThreadWithAssert [2021-07-01 09:56:02,292 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-07-01 09:56:02,292 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-07-01 09:56:02,292 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-07-01 09:56:02,292 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-07-01 09:56:02,292 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-07-01 09:56:02,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-07-01 09:56:02,292 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-01 09:56:02,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-01 09:56:02,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-01 09:56:02,293 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-01 09:56:02,423 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-01 09:56:02,424 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-07-01 09:56:02,425 INFO L202 PluginConnector]: Adding new model bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 09:56:02 BoogieIcfgContainer [2021-07-01 09:56:02,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-01 09:56:02,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-01 09:56:02,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-01 09:56:02,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-01 09:56:02,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:56:02" (1/2) ... [2021-07-01 09:56:02,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a220ff9 and model type bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 09:56:02, skipping insertion in model container [2021-07-01 09:56:02,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 09:56:02" (2/2) ... [2021-07-01 09:56:02,430 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-incorrect03.bpl [2021-07-01 09:56:02,433 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-01 09:56:02,433 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-01 09:56:02,434 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-01 09:56:02,453 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-01 09:56:02,468 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-01 09:56:02,481 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-01 09:56:02,481 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-01 09:56:02,481 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-01 09:56:02,481 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-01 09:56:02,481 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-01 09:56:02,481 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-01 09:56:02,482 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-01 09:56:02,482 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-01 09:56:02,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 42 places, 32 transitions, 84 flow [2021-07-01 09:56:02,517 INFO L129 PetriNetUnfolder]: 3/28 cut-off events. [2021-07-01 09:56:02,518 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-07-01 09:56:02,520 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 3/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 62 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2021-07-01 09:56:02,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 32 transitions, 84 flow [2021-07-01 09:56:02,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions, 0 flow [2021-07-01 09:56:02,522 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-07-01 09:56:02,522 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-07-01 09:56:02,523 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/2) [2021-07-01 09:56:02,524 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-01 09:56:02,543 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-01 09:56:02,543 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-01 09:56:02,543 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-01 09:56:02,544 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-01 09:56:02,544 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-01 09:56:02,544 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-01 09:56:02,544 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-01 09:56:02,544 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadWithAssertThread1of1ForFork1======== [2021-07-01 09:56:02,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 42 places, 32 transitions, 84 flow [2021-07-01 09:56:02,554 INFO L129 PetriNetUnfolder]: 3/28 cut-off events. [2021-07-01 09:56:02,554 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-07-01 09:56:02,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 3/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 62 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2021-07-01 09:56:02,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 32 transitions, 84 flow [2021-07-01 09:56:02,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 28 transitions, 68 flow [2021-07-01 09:56:02,561 INFO L129 PetriNetUnfolder]: 1/18 cut-off events. [2021-07-01 09:56:02,561 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-07-01 09:56:02,562 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-07-01 09:56:02,562 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:56:02,562 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:56:02,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:56:02,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1434969807, now seen corresponding path program 1 times [2021-07-01 09:56:02,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:56:02,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647905016] [2021-07-01 09:56:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:56:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:56:02,764 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:56:02,765 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 09:56:02,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:56:02,771 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-07-01 09:56:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:56:02,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:56:02,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647905016] [2021-07-01 09:56:02,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647905016] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 09:56:02,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 09:56:02,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-01 09:56:02,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715119914] [2021-07-01 09:56:02,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-01 09:56:02,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:56:02,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-01 09:56:02,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-01 09:56:02,827 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 32 [2021-07-01 09:56:02,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 68 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) [2021-07-01 09:56:02,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-07-01 09:56:02,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 32 [2021-07-01 09:56:02,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-07-01 09:56:02,861 INFO L129 PetriNetUnfolder]: 4/36 cut-off events. [2021-07-01 09:56:02,861 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-07-01 09:56:02,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 36 events. 4/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 75 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2021-07-01 09:56:02,863 INFO L132 encePairwiseOnDemand]: 28/32 looper letters, 2 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2021-07-01 09:56:02,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 29 transitions, 80 flow [2021-07-01 09:56:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-01 09:56:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-07-01 09:56:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2021-07-01 09:56:02,877 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9375 [2021-07-01 09:56:02,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2021-07-01 09:56:02,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2021-07-01 09:56:02,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-07-01 09:56:02,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2021-07-01 09:56:02,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-07-01 09:56:02,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-07-01 09:56:02,883 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-07-01 09:56:02,884 INFO L185 Difference]: Start difference. First operand has 38 places, 28 transitions, 68 flow. Second operand 3 states and 90 transitions. [2021-07-01 09:56:02,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 29 transitions, 80 flow [2021-07-01 09:56:02,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-07-01 09:56:02,898 INFO L241 Difference]: Finished difference. Result has 38 places, 29 transitions, 82 flow [2021-07-01 09:56:02,899 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2021-07-01 09:56:02,899 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2021-07-01 09:56:02,900 INFO L482 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 82 flow [2021-07-01 09:56:02,900 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) [2021-07-01 09:56:02,901 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-07-01 09:56:02,902 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:56:02,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-01 09:56:02,902 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:56:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:56:02,904 INFO L82 PathProgramCache]: Analyzing trace with hash 80157427, now seen corresponding path program 1 times [2021-07-01 09:56:02,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:56:02,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539052107] [2021-07-01 09:56:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:56:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:56:02,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:56:02,931 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 09:56:02,931 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:56:02,932 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 09:56:02,935 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 09:56:02,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 09:56:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:56:02,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:56:02,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539052107] [2021-07-01 09:56:02,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539052107] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 09:56:02,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 09:56:02,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-01 09:56:02,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492370702] [2021-07-01 09:56:02,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-01 09:56:02,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:56:02,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-01 09:56:02,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-01 09:56:02,944 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 32 [2021-07-01 09:56:02,946 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2021-07-01 09:56:02,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-07-01 09:56:02,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 32 [2021-07-01 09:56:02,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-07-01 09:56:02,974 INFO L129 PetriNetUnfolder]: 12/105 cut-off events. [2021-07-01 09:56:02,975 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-07-01 09:56:02,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 105 events. 12/105 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 499 event pairs, 5 based on Foata normal form. 15/114 useless extension candidates. Maximal degree in co-relation 165. Up to 17 conditions per place. [2021-07-01 09:56:02,976 INFO L132 encePairwiseOnDemand]: 28/32 looper letters, 4 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2021-07-01 09:56:02,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 29 transitions, 92 flow [2021-07-01 09:56:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-01 09:56:02,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-07-01 09:56:02,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2021-07-01 09:56:02,977 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9270833333333334 [2021-07-01 09:56:02,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2021-07-01 09:56:02,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2021-07-01 09:56:02,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-07-01 09:56:02,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2021-07-01 09:56:02,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-07-01 09:56:02,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-07-01 09:56:02,979 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-07-01 09:56:02,979 INFO L185 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 89 transitions. [2021-07-01 09:56:02,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 29 transitions, 92 flow [2021-07-01 09:56:02,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 29 transitions, 86 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-07-01 09:56:02,981 INFO L241 Difference]: Finished difference. Result has 39 places, 29 transitions, 85 flow [2021-07-01 09:56:02,981 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=39, PETRI_TRANSITIONS=29} [2021-07-01 09:56:02,981 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2021-07-01 09:56:02,982 INFO L482 AbstractCegarLoop]: Abstraction has has 39 places, 29 transitions, 85 flow [2021-07-01 09:56:02,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2021-07-01 09:56:02,982 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-07-01 09:56:02,982 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:56:02,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-01 09:56:02,982 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:56:02,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:56:02,982 INFO L82 PathProgramCache]: Analyzing trace with hash 650817139, now seen corresponding path program 2 times [2021-07-01 09:56:02,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:56:02,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377660876] [2021-07-01 09:56:02,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:56:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-01 09:56:02,989 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-01 09:56:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-01 09:56:02,992 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-01 09:56:03,001 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-01 09:56:03,001 INFO L605 BasicCegarLoop]: Counterexample might be feasible [2021-07-01 09:56:03,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-01 09:56:03,002 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadWithAssertThread1of1ForFork1 was UNSAFE (2/2) [2021-07-01 09:56:03,003 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-01 09:56:03,011 INFO L202 PluginConnector]: Adding new model bluetooth-incorrect03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 09:56:03 BasicIcfg [2021-07-01 09:56:03,011 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-01 09:56:03,012 INFO L168 Benchmark]: Toolchain (without parser) took 802.38 ms. Allocated memory is still 180.4 MB. Free memory was 161.3 MB in the beginning and 142.5 MB in the end (delta: 18.8 MB). Peak memory consumption was 19.3 MB. Max. memory is 8.0 GB. [2021-07-01 09:56:03,012 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 180.4 MB. Free memory is still 162.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-01 09:56:03,013 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.67 ms. Allocated memory is still 180.4 MB. Free memory was 161.2 MB in the beginning and 159.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-01 09:56:03,013 INFO L168 Benchmark]: Boogie Preprocessor took 10.73 ms. Allocated memory is still 180.4 MB. Free memory was 159.4 MB in the beginning and 158.5 MB in the end (delta: 917.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-01 09:56:03,014 INFO L168 Benchmark]: RCFGBuilder took 180.42 ms. Allocated memory is still 180.4 MB. Free memory was 158.4 MB in the beginning and 144.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-01 09:56:03,014 INFO L168 Benchmark]: TraceAbstraction took 584.73 ms. Allocated memory is still 180.4 MB. Free memory was 143.7 MB in the beginning and 142.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.5 MB. Max. memory is 8.0 GB. [2021-07-01 09:56:03,016 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 0.11 ms. Allocated memory is still 180.4 MB. Free memory is still 162.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.67 ms. Allocated memory is still 180.4 MB. Free memory was 161.2 MB in the beginning and 159.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.73 ms. Allocated memory is still 180.4 MB. Free memory was 159.4 MB in the beginning and 158.5 MB in the end (delta: 917.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 180.42 ms. Allocated memory is still 180.4 MB. Free memory was 158.4 MB in the beginning and 144.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 584.73 ms. Allocated memory is still 180.4 MB. Free memory was 143.7 MB in the beginning and 142.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 36]: assertion can be violated assertion can be violated We found a FailurePath: [L14] 0 pendingIo := 1; VAL [pendingIo=1] [L15] 0 stopped := false; VAL [pendingIo=1, stopped=false] [L16] 0 stoppingEvent := false; VAL [pendingIo=1, stopped=false, stoppingEvent=false] [L17] 0 stoppingFlag := false; VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L19] FORK 0 fork 0 ServerThread(); VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L21] FORK 0 fork 1 DeviceThreadWithAssert(); VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L58] 2 assume !stoppingFlag; VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L80] 1 stoppingFlag := true; VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=true] [L90] 1 pendingIo := pendingIo - 1; [L91] COND TRUE 1 pendingIo == 0 [L92] 1 stoppingEvent := true; VAL [pendingIo=0, stopped=false, stoppingEvent=true, stoppingFlag=true] [L82] 1 assume stoppingEvent; VAL [pendingIo=0, stopped=false, stoppingEvent=true, stoppingFlag=true] [L83] 1 stopped := true; VAL [pendingIo=0, stopped=true, stoppingEvent=true, stoppingFlag=true] [L59] 2 pendingIo := pendingIo + 1; VAL [pendingIo=1, stopped=true, stoppingEvent=true, stoppingFlag=true] [L36] 2 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 8 procedures, 50 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 44.4ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.2ms, 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: DeviceThreadWithAssertThread1of1ForFork1 with 1 thread instances CFG has 8 procedures, 50 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 459.2ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 116.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 7 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=2, InterpolantAutomatonStates: 6, 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: 23.2ms SsaConstructionTime, 34.2ms SatisfiabilityAnalysisTime, 80.7ms InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 27 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...