/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth04-incorrect.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d310483fe8b4879eee5de19363f50e4b839cc4ec-d310483 [2021-06-24 17:53:20,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-24 17:53:20,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-24 17:53:20,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-24 17:53:20,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-24 17:53:20,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-24 17:53:20,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-24 17:53:20,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-24 17:53:21,276 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-24 17:53:21,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-24 17:53:21,278 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-24 17:53:21,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-24 17:53:21,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-24 17:53:21,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-24 17:53:21,280 INFO L138 SettingsManager]: * Use SBE=true [2021-06-24 17:53:21,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-24 17:53:21,280 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-24 17:53:21,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-24 17:53:21,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-24 17:53:21,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-24 17:53:21,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-24 17:53:21,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-24 17:53:21,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-24 17:53:21,281 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-24 17:53:21,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-24 17:53:21,282 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-24 17:53:21,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-24 17:53:21,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-24 17:53:21,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-24 17:53:21,282 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-24 17:53:21,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-24 17:53:21,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 17:53:21,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-24 17:53:21,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-24 17:53:21,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-24 17:53:21,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-24 17:53:21,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-24 17:53:21,283 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-24 17:53:21,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-24 17:53:21,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-24 17:53:21,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-24 17:53:21,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-24 17:53:21,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-24 17:53:21,801 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-24 17:53:21,805 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-24 17:53:21,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth04-incorrect.bpl [2021-06-24 17:53:21,806 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth04-incorrect.bpl' [2021-06-24 17:53:21,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-24 17:53:21,875 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-24 17:53:21,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-24 17:53:21,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-24 17:53:21,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-24 17:53:21,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-24 17:53:21,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-24 17:53:21,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-24 17:53:21,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-24 17:53:21,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-24 17:53:21,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-24 17:53:21,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-24 17:53:21,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-24 17:53:21,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (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 17:53:22,020 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-06-24 17:53:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-06-24 17:53:22,020 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-06-24 17:53:22,020 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-06-24 17:53:22,021 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-06-24 17:53:22,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-06-24 17:53:22,021 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-24 17:53:22,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-24 17:53:22,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-24 17:53:22,022 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 17:53:22,247 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-24 17:53:22,247 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-06-24 17:53:22,249 INFO L202 PluginConnector]: Adding new model bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 05:53:22 BoogieIcfgContainer [2021-06-24 17:53:22,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-24 17:53:22,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-24 17:53:22,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-24 17:53:22,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-24 17:53:22,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/2) ... [2021-06-24 17:53:22,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de0366a and model type bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 05:53:22, skipping insertion in model container [2021-06-24 17:53:22,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 05:53:22" (2/2) ... [2021-06-24 17:53:22,254 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth04-incorrect.bpl [2021-06-24 17:53:22,258 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-24 17:53:22,258 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-24 17:53:22,259 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-24 17:53:22,259 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-24 17:53:22,313 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-24 17:53:22,328 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-24 17:53:22,345 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 17:53:22,345 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 17:53:22,345 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 17:53:22,345 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 17:53:22,345 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 17:53:22,345 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 17:53:22,345 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 17:53:22,345 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-24 17:53:22,358 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 44 transitions, 113 flow [2021-06-24 17:53:24,023 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 17111 states, 1551 states have (on average 3.8130238555770473) internal successors, (5914), 1558 states have internal predecessors, (5914), 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 17:53:24,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 17111 states, 1551 states have (on average 3.8130238555770473) internal successors, (5914), 1558 states have internal predecessors, (5914), 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 17:53:24,044 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 17:53:24,045 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/5) [2021-06-24 17:53:24,046 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 17:53:24,049 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 17:53:24,049 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 17:53:24,049 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 17:53:24,050 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 17:53:24,050 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 17:53:24,050 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 17:53:24,050 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 17:53:24,050 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork4======== [2021-06-24 17:53:24,051 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 44 transitions, 113 flow [2021-06-24 17:53:25,419 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 17111 states, 14511 states have (on average 5.260147474329819) internal successors, (76330), 14518 states have internal predecessors, (76330), 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 17:53:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand has 17111 states, 14511 states have (on average 5.260147474329819) internal successors, (76330), 14518 states have internal predecessors, (76330), 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 17:53:25,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 17:53:25,502 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:25,503 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:25,503 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:25,509 INFO L82 PathProgramCache]: Analyzing trace with hash -797775574, now seen corresponding path program 1 times [2021-06-24 17:53:25,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:25,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938257164] [2021-06-24 17:53:25,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:25,616 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 17:53:25,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:25,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938257164] [2021-06-24 17:53:25,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938257164] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:25,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:25,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 17:53:25,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928466154] [2021-06-24 17:53:25,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:53:25,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:25,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:53:25,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:25,658 INFO L87 Difference]: Start difference. First operand has 17111 states, 14511 states have (on average 5.260147474329819) internal successors, (76330), 14518 states have internal predecessors, (76330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 17:53:25,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:25,894 INFO L93 Difference]: Finished difference Result 14293 states and 69349 transitions. [2021-06-24 17:53:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:53:25,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-24 17:53:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:26,002 INFO L225 Difference]: With dead ends: 14293 [2021-06-24 17:53:26,003 INFO L226 Difference]: Without dead ends: 10327 [2021-06-24 17:53:26,004 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:26,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10327 states. [2021-06-24 17:53:26,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10327 to 10299. [2021-06-24 17:53:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10299 states, 10291 states have (on average 4.757555145272568) internal successors, (48960), 10298 states have internal predecessors, (48960), 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 17:53:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10299 states to 10299 states and 48960 transitions. [2021-06-24 17:53:26,582 INFO L78 Accepts]: Start accepts. Automaton has 10299 states and 48960 transitions. Word has length 12 [2021-06-24 17:53:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:26,583 INFO L482 AbstractCegarLoop]: Abstraction has 10299 states and 48960 transitions. [2021-06-24 17:53:26,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 17:53:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 10299 states and 48960 transitions. [2021-06-24 17:53:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 17:53:26,594 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:26,594 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:26,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-24 17:53:26,595 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:26,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:26,595 INFO L82 PathProgramCache]: Analyzing trace with hash 511304936, now seen corresponding path program 1 times [2021-06-24 17:53:26,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:26,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438272793] [2021-06-24 17:53:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:26,646 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 17:53:26,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:26,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438272793] [2021-06-24 17:53:26,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438272793] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:26,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:26,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 17:53:26,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826724789] [2021-06-24 17:53:26,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 17:53:26,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:26,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 17:53:26,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:53:26,649 INFO L87 Difference]: Start difference. First operand 10299 states and 48960 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 17:53:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:26,899 INFO L93 Difference]: Finished difference Result 16147 states and 79068 transitions. [2021-06-24 17:53:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 17:53:26,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-24 17:53:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:27,134 INFO L225 Difference]: With dead ends: 16147 [2021-06-24 17:53:27,135 INFO L226 Difference]: Without dead ends: 16147 [2021-06-24 17:53:27,137 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:53:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16147 states. [2021-06-24 17:53:27,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16147 to 15995. [2021-06-24 17:53:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15995 states, 15987 states have (on average 4.906986926878089) internal successors, (78448), 15994 states have internal predecessors, (78448), 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 17:53:27,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15995 states to 15995 states and 78448 transitions. [2021-06-24 17:53:27,951 INFO L78 Accepts]: Start accepts. Automaton has 15995 states and 78448 transitions. Word has length 16 [2021-06-24 17:53:27,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:27,952 INFO L482 AbstractCegarLoop]: Abstraction has 15995 states and 78448 transitions. [2021-06-24 17:53:27,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 17:53:27,952 INFO L276 IsEmpty]: Start isEmpty. Operand 15995 states and 78448 transitions. [2021-06-24 17:53:27,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 17:53:27,972 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:27,972 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:27,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-24 17:53:27,972 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:27,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:27,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1141384586, now seen corresponding path program 2 times [2021-06-24 17:53:27,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:27,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846865059] [2021-06-24 17:53:27,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-24 17:53:27,997 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-24 17:53:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-24 17:53:28,002 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-24 17:53:28,014 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-24 17:53:28,014 INFO L605 BasicCegarLoop]: Counterexample might be feasible [2021-06-24 17:53:28,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-24 17:53:28,015 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork4 was UNSAFE (2/5) [2021-06-24 17:53:28,016 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-24 17:53:28,025 INFO L202 PluginConnector]: Adding new model bluetooth04-incorrect.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 05:53:28 BasicIcfg [2021-06-24 17:53:28,025 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-24 17:53:28,026 INFO L168 Benchmark]: Toolchain (without parser) took 6185.61 ms. Allocated memory was 200.3 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 179.7 MB in the beginning and 1.6 GB in the end (delta: -1.4 GB). Peak memory consumption was 300.5 MB. Max. memory is 8.0 GB. [2021-06-24 17:53:28,026 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 200.3 MB. Free memory is still 180.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-24 17:53:28,027 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.85 ms. Allocated memory is still 200.3 MB. Free memory was 179.6 MB in the beginning and 177.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-24 17:53:28,027 INFO L168 Benchmark]: Boogie Preprocessor took 10.17 ms. Allocated memory is still 200.3 MB. Free memory was 177.8 MB in the beginning and 176.9 MB in the end (delta: 948.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-24 17:53:28,027 INFO L168 Benchmark]: RCFGBuilder took 334.09 ms. Allocated memory is still 200.3 MB. Free memory was 176.9 MB in the beginning and 164.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-24 17:53:28,028 INFO L168 Benchmark]: TraceAbstraction took 5774.89 ms. Allocated memory was 200.3 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 163.9 MB in the beginning and 1.6 GB in the end (delta: -1.4 GB). Peak memory consumption was 284.7 MB. Max. memory is 8.0 GB. [2021-06-24 17:53:28,029 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 200.3 MB. Free memory is still 180.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.85 ms. Allocated memory is still 200.3 MB. Free memory was 179.6 MB in the beginning and 177.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.17 ms. Allocated memory is still 200.3 MB. Free memory was 177.8 MB in the beginning and 176.9 MB in the end (delta: 948.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 334.09 ms. Allocated memory is still 200.3 MB. Free memory was 176.9 MB in the beginning and 164.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5774.89 ms. Allocated memory was 200.3 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 163.9 MB in the beginning and 1.6 GB in the end (delta: -1.4 GB). Peak memory consumption was 284.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 35]: 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] [L21] FORK 0 fork 3 DeviceThread(); VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L22] FORK 0 fork 4 DeviceThread(); VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L45] 5 assume !stoppingFlag; VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L67] 1 stoppingFlag := true; VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=true] [L77] 1 pendingIo := pendingIo - 1; [L78] COND TRUE 1 pendingIo == 0 [L79] 1 stoppingEvent := true; VAL [pendingIo=0, stopped=false, stoppingEvent=true, stoppingFlag=true] [L46] 5 pendingIo := pendingIo + 1; VAL [pendingIo=1, stopped=false, stoppingEvent=true, stoppingFlag=true] [L69] 1 assume stoppingEvent; VAL [pendingIo=1, stopped=false, stoppingEvent=true, stoppingFlag=true] [L70] 1 stopped := true; VAL [pendingIo=1, stopped=true, stoppingEvent=true, stoppingFlag=true] [L35] 5 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, 58 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1701.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 20.9ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1677.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=17111occurred 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: DeviceThreadThread1of1ForFork4 with 1 thread instances CFG has 8 procedures, 58 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3965.6ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 113.2ms, AutomataDifference: 869.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1369.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 76 SDtfs, 80 SDslu, 96 SDs, 0 SdLazy, 46 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=17111occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1383.3ms AutomataMinimizationTime, 2 MinimizatonAttempts, 180 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.7ms SsaConstructionTime, 35.6ms SatisfiabilityAnalysisTime, 81.1ms InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 91 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...