/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/bluetooth02-incorrect.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d310483fe8b4879eee5de19363f50e4b839cc4ec-d310483 [2021-06-24 18:22:08,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-24 18:22:08,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-24 18:22:08,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-24 18:22:08,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-24 18:22:08,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-24 18:22:08,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-24 18:22:08,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-24 18:22:08,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-24 18:22:08,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-24 18:22:08,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-24 18:22:08,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-24 18:22:08,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-24 18:22:08,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-24 18:22:08,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-24 18:22:08,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-24 18:22:08,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-24 18:22:08,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-24 18:22:08,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-24 18:22:08,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-24 18:22:08,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-24 18:22:08,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-24 18:22:08,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-24 18:22:08,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-24 18:22:08,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-24 18:22:08,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-24 18:22:08,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-24 18:22:08,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-24 18:22:08,576 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 18:22:08,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-24 18:22:08,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-24 18:22:08,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-24 18:22:08,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-24 18:22:08,630 INFO L138 SettingsManager]: * Use SBE=true [2021-06-24 18:22:08,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-24 18:22:08,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-24 18:22:08,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-24 18:22:08,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-24 18:22:08,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-24 18:22:08,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-24 18:22:08,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-24 18:22:08,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-24 18:22:08,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-24 18:22:08,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-24 18:22:08,632 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-24 18:22:08,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-24 18:22:08,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-24 18:22:08,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-24 18:22:08,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-24 18:22:08,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-24 18:22:08,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 18:22:08,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-24 18:22:08,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-24 18:22:08,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-24 18:22:08,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-24 18:22:08,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-24 18:22:08,634 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-24 18:22:08,634 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-24 18:22:08,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-24 18:22:08,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-24 18:22:08,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-24 18:22:08,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-24 18:22:08,893 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-24 18:22:08,894 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-24 18:22:08,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth02-incorrect.bpl [2021-06-24 18:22:08,895 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth02-incorrect.bpl' [2021-06-24 18:22:08,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-24 18:22:08,923 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-24 18:22:08,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-24 18:22:08,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-24 18:22:08,924 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-24 18:22:08,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth02-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth02-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-24 18:22:08,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-24 18:22:08,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-24 18:22:08,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-24 18:22:08,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth02-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth02-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth02-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth02-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth02-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth02-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth02-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-24 18:22:08,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-24 18:22:08,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-24 18:22:08,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-24 18:22:08,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth02-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 18:22:09,023 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-06-24 18:22:09,023 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-06-24 18:22:09,024 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-06-24 18:22:09,024 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-06-24 18:22:09,024 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-06-24 18:22:09,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-06-24 18:22:09,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-24 18:22:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-24 18:22:09,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-24 18:22:09,026 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 18:22:09,236 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-24 18:22:09,236 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-06-24 18:22:09,238 INFO L202 PluginConnector]: Adding new model bluetooth02-incorrect.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:22:09 BoogieIcfgContainer [2021-06-24 18:22:09,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-24 18:22:09,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-24 18:22:09,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-24 18:22:09,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-24 18:22:09,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth02-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/2) ... [2021-06-24 18:22:09,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0417d9 and model type bluetooth02-incorrect.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 06:22:09, skipping insertion in model container [2021-06-24 18:22:09,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth02-incorrect.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:22:09" (2/2) ... [2021-06-24 18:22:09,244 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth02-incorrect.bpl [2021-06-24 18:22:09,248 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-24 18:22:09,253 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-24 18:22:09,253 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-24 18:22:09,300 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-24 18:22:09,317 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-24 18:22:09,336 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:22:09,336 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:22:09,336 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:22:09,336 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 18:22:09,337 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-24 18:22:09,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 28 transitions, 71 flow [2021-06-24 18:22:09,356 INFO L129 PetriNetUnfolder]: 2/25 cut-off events. [2021-06-24 18:22:09,356 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 25 events. 2/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 48 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2021-06-24 18:22:09,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 28 transitions, 71 flow [2021-06-24 18:22:09,360 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions, 0 flow [2021-06-24 18:22:09,360 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-06-24 18:22:09,360 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,361 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/3) [2021-06-24 18:22:09,362 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:22:09,364 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:22:09,365 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:22:09,365 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:22:09,365 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:22:09,365 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:22:09,365 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:22:09,365 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:22:09,365 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork2======== [2021-06-24 18:22:09,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 28 transitions, 71 flow [2021-06-24 18:22:09,372 INFO L129 PetriNetUnfolder]: 2/25 cut-off events. [2021-06-24 18:22:09,372 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 25 events. 2/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 48 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2021-06-24 18:22:09,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 28 transitions, 71 flow [2021-06-24 18:22:09,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 25 transitions, 59 flow [2021-06-24 18:22:09,379 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-06-24 18:22:09,380 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,380 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:09,380 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:09,380 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:09,384 INFO L82 PathProgramCache]: Analyzing trace with hash 780098874, now seen corresponding path program 1 times [2021-06-24 18:22:09,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:09,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108899116] [2021-06-24 18:22:09,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:09,488 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,489 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,489 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,490 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:09,501 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 18:22:09,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:09,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108899116] [2021-06-24 18:22:09,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108899116] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:09,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:09,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:22:09,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246111985] [2021-06-24 18:22:09,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:09,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:09,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:09,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:09,534 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 28 [2021-06-24 18:22:09,538 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 18:22:09,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:09,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 28 [2021-06-24 18:22:09,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:09,597 INFO L129 PetriNetUnfolder]: 13/71 cut-off events. [2021-06-24 18:22:09,597 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 71 events. 13/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 237 event pairs, 3 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 97. Up to 18 conditions per place. [2021-06-24 18:22:09,599 INFO L132 encePairwiseOnDemand]: 22/28 looper letters, 4 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2021-06-24 18:22:09,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 27 transitions, 79 flow [2021-06-24 18:22:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2021-06-24 18:22:09,611 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-06-24 18:22:09,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2021-06-24 18:22:09,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2021-06-24 18:22:09,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:09,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2021-06-24 18:22:09,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 18:22:09,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 18:22:09,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 18:22:09,621 INFO L185 Difference]: Start difference. First operand has 33 places, 25 transitions, 59 flow. Second operand 3 states and 76 transitions. [2021-06-24 18:22:09,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 27 transitions, 79 flow [2021-06-24 18:22:09,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 76 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-06-24 18:22:09,628 INFO L241 Difference]: Finished difference. Result has 34 places, 27 transitions, 84 flow [2021-06-24 18:22:09,629 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2021-06-24 18:22:09,630 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 1 predicate places. [2021-06-24 18:22:09,630 INFO L482 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 84 flow [2021-06-24 18:22:09,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 18:22:09,630 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:09,631 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:09,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-24 18:22:09,631 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:09,632 INFO L82 PathProgramCache]: Analyzing trace with hash -111332616, now seen corresponding path program 1 times [2021-06-24 18:22:09,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:09,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659664534] [2021-06-24 18:22:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:09,683 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,684 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:09,693 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,694 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:09,708 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,708 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:09,720 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,721 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:09,726 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,727 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,727 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 18:22:09,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:09,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659664534] [2021-06-24 18:22:09,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659664534] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:09,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:09,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:22:09,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356793030] [2021-06-24 18:22:09,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:22:09,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:09,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:22:09,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:22:09,732 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 28 [2021-06-24 18:22:09,734 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 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 18:22:09,734 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:09,734 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 28 [2021-06-24 18:22:09,734 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:09,837 INFO L129 PetriNetUnfolder]: 80/223 cut-off events. [2021-06-24 18:22:09,837 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2021-06-24 18:22:09,842 INFO L84 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 223 events. 80/223 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1078 event pairs, 21 based on Foata normal form. 6/202 useless extension candidates. Maximal degree in co-relation 413. Up to 88 conditions per place. [2021-06-24 18:22:09,845 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 8 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2021-06-24 18:22:09,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 140 flow [2021-06-24 18:22:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:22:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-24 18:22:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2021-06-24 18:22:09,851 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8571428571428571 [2021-06-24 18:22:09,851 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 120 transitions. [2021-06-24 18:22:09,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 120 transitions. [2021-06-24 18:22:09,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:09,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 120 transitions. [2021-06-24 18:22:09,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 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 18:22:09,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 18:22:09,855 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 18:22:09,855 INFO L185 Difference]: Start difference. First operand has 34 places, 27 transitions, 84 flow. Second operand 5 states and 120 transitions. [2021-06-24 18:22:09,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 140 flow [2021-06-24 18:22:09,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:09,860 INFO L241 Difference]: Finished difference. Result has 38 places, 35 transitions, 140 flow [2021-06-24 18:22:09,860 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2021-06-24 18:22:09,861 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2021-06-24 18:22:09,861 INFO L482 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 140 flow [2021-06-24 18:22:09,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 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 18:22:09,861 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:09,861 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:09,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-24 18:22:09,861 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:09,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:09,862 INFO L82 PathProgramCache]: Analyzing trace with hash -205612424, now seen corresponding path program 2 times [2021-06-24 18:22:09,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:09,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616569369] [2021-06-24 18:22:09,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:09,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,882 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,885 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 1 [2021-06-24 18:22:09,886 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 18:22:09,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:09,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616569369] [2021-06-24 18:22:09,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616569369] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:09,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:09,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:22:09,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659496644] [2021-06-24 18:22:09,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:09,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:09,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:09,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:09,889 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 28 [2021-06-24 18:22:09,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 18:22:09,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:09,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 28 [2021-06-24 18:22:09,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:09,927 INFO L129 PetriNetUnfolder]: 61/226 cut-off events. [2021-06-24 18:22:09,927 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-06-24 18:22:09,928 INFO L84 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 226 events. 61/226 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1209 event pairs, 18 based on Foata normal form. 25/233 useless extension candidates. Maximal degree in co-relation 463. Up to 59 conditions per place. [2021-06-24 18:22:09,929 INFO L132 encePairwiseOnDemand]: 25/28 looper letters, 3 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2021-06-24 18:22:09,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 148 flow [2021-06-24 18:22:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:09,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2021-06-24 18:22:09,933 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9285714285714286 [2021-06-24 18:22:09,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 78 transitions. [2021-06-24 18:22:09,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 78 transitions. [2021-06-24 18:22:09,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:09,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 78 transitions. [2021-06-24 18:22:09,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 18:22:09,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 18:22:09,936 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 18:22:09,936 INFO L185 Difference]: Start difference. First operand has 38 places, 35 transitions, 140 flow. Second operand 3 states and 78 transitions. [2021-06-24 18:22:09,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 148 flow [2021-06-24 18:22:09,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:09,940 INFO L241 Difference]: Finished difference. Result has 40 places, 35 transitions, 145 flow [2021-06-24 18:22:09,940 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2021-06-24 18:22:09,940 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2021-06-24 18:22:09,940 INFO L482 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 145 flow [2021-06-24 18:22:09,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 18:22:09,940 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:09,940 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:09,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-24 18:22:09,941 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:09,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:09,941 INFO L82 PathProgramCache]: Analyzing trace with hash 175912764, now seen corresponding path program 3 times [2021-06-24 18:22:09,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:09,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652548848] [2021-06-24 18:22:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-24 18:22:09,951 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-24 18:22:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-24 18:22:09,966 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-24 18:22:09,979 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-24 18:22:09,979 INFO L605 BasicCegarLoop]: Counterexample might be feasible [2021-06-24 18:22:09,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-24 18:22:09,979 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork2 was UNSAFE (2/3) [2021-06-24 18:22:09,980 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-24 18:22:09,998 INFO L202 PluginConnector]: Adding new model bluetooth02-incorrect.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 06:22:09 BasicIcfg [2021-06-24 18:22:09,998 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-24 18:22:10,000 INFO L168 Benchmark]: Toolchain (without parser) took 1076.16 ms. Allocated memory is still 190.8 MB. Free memory was 171.2 MB in the beginning and 132.0 MB in the end (delta: 39.2 MB). Peak memory consumption was 40.3 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:10,001 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 172.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-24 18:22:10,001 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.91 ms. Allocated memory is still 190.8 MB. Free memory was 171.0 MB in the beginning and 169.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:10,002 INFO L168 Benchmark]: Boogie Preprocessor took 13.11 ms. Allocated memory is still 190.8 MB. Free memory was 169.3 MB in the beginning and 168.4 MB in the end (delta: 836.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:10,007 INFO L168 Benchmark]: RCFGBuilder took 271.69 ms. Allocated memory is still 190.8 MB. Free memory was 168.3 MB in the beginning and 155.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:10,008 INFO L168 Benchmark]: TraceAbstraction took 758.75 ms. Allocated memory is still 190.8 MB. Free memory was 155.4 MB in the beginning and 132.0 MB in the end (delta: 23.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:10,011 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 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 172.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.91 ms. Allocated memory is still 190.8 MB. Free memory was 171.0 MB in the beginning and 169.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.11 ms. Allocated memory is still 190.8 MB. Free memory was 169.3 MB in the beginning and 168.4 MB in the end (delta: 836.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 271.69 ms. Allocated memory is still 190.8 MB. Free memory was 168.3 MB in the beginning and 155.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 758.75 ms. Allocated memory is still 190.8 MB. Free memory was 155.4 MB in the beginning and 132.0 MB in the end (delta: 23.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: 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] [L43] 3 assume !stoppingFlag; VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L65] 1 stoppingFlag := true; VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=true] [L75] 1 pendingIo := pendingIo - 1; [L76] COND TRUE 1 pendingIo == 0 [L77] 1 stoppingEvent := true; VAL [pendingIo=0, stopped=false, stoppingEvent=true, stoppingFlag=true] [L67] 1 assume stoppingEvent; VAL [pendingIo=0, stopped=false, stoppingEvent=true, stoppingFlag=true] [L68] 1 stopped := true; VAL [pendingIo=0, stopped=true, stoppingEvent=true, stoppingFlag=true] [L44] 3 pendingIo := pendingIo + 1; VAL [pendingIo=1, stopped=true, stoppingEvent=true, stoppingFlag=true] [L33] 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 6 procedures, 42 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: 31.9ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.0ms, 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 6 procedures, 42 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 615.2ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 283.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11 SDtfs, 3 SDslu, 4 SDs, 0 SdLazy, 36 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred 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: 11.6ms SsaConstructionTime, 37.6ms SatisfiabilityAnalysisTime, 128.6ms 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...