/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/bluetooth-incorrect04.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-1c3aa5735269c4be989a50fc1da9ea7b9492ef29-1c3aa57 [2021-07-01 09:25:10,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-01 09:25:10,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-01 09:25:10,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-01 09:25:10,156 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 [2021-07-01 09:25:10,183 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-01 09:25:10,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-01 09:25:10,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-01 09:25:10,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-01 09:25:10,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-01 09:25:10,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-01 09:25:10,186 INFO L138 SettingsManager]: * Use SBE=true [2021-07-01 09:25:10,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-01 09:25:10,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-01 09:25:10,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-01 09:25:10,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-01 09:25:10,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-01 09:25:10,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-01 09:25:10,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-01 09:25:10,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-01 09:25:10,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-01 09:25:10,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-01 09:25:10,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-01 09:25:10,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-01 09:25:10,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-01 09:25:10,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-01 09:25:10,188 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-01 09:25:10,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-01 09:25:10,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-01 09:25:10,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-01 09:25:10,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-01 09:25:10,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-01 09:25:10,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-01 09:25:10,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-01 09:25:10,189 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-01 09:25:10,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-01 09:25:10,189 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-01 09:25:10,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-01 09:25:10,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-01 09:25:10,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-01 09:25:10,481 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-01 09:25:10,482 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-01 09:25:10,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-incorrect04.bpl [2021-07-01 09:25:10,482 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-incorrect04.bpl' [2021-07-01 09:25:10,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-01 09:25:10,498 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-01 09:25:10,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-01 09:25:10,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-01 09:25:10,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-01 09:25:10,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:10" (1/1) ... [2021-07-01 09:25:10,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:10" (1/1) ... [2021-07-01 09:25:10,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-01 09:25:10,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-01 09:25:10,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-01 09:25:10,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-01 09:25:10,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:10" (1/1) ... [2021-07-01 09:25:10,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:10" (1/1) ... [2021-07-01 09:25:10,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:10" (1/1) ... [2021-07-01 09:25:10,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:10" (1/1) ... [2021-07-01 09:25:10,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:10" (1/1) ... [2021-07-01 09:25:10,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:10" (1/1) ... [2021-07-01 09:25:10,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:10" (1/1) ... [2021-07-01 09:25:10,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-01 09:25:10,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-01 09:25:10,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-01 09:25:10,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-01 09:25:10,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-01 09:25:10,626 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThreadWithAssert given in one single declaration [2021-07-01 09:25:10,626 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThreadWithAssert [2021-07-01 09:25:10,627 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThreadWithAssert [2021-07-01 09:25:10,627 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-07-01 09:25:10,627 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-07-01 09:25:10,627 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-07-01 09:25:10,627 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-07-01 09:25:10,627 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-07-01 09:25:10,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-07-01 09:25:10,627 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-01 09:25:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-01 09:25:10,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-01 09:25:10,628 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-01 09:25:10,869 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-01 09:25:10,869 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-07-01 09:25:10,871 INFO L202 PluginConnector]: Adding new model bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 09:25:10 BoogieIcfgContainer [2021-07-01 09:25:10,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-01 09:25:10,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-01 09:25:10,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-01 09:25:10,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-01 09:25:10,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:10" (1/2) ... [2021-07-01 09:25:10,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c56be6 and model type bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 09:25:10, skipping insertion in model container [2021-07-01 09:25:10,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 09:25:10" (2/2) ... [2021-07-01 09:25:10,876 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-incorrect04.bpl [2021-07-01 09:25:10,879 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-01 09:25:10,880 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-01 09:25:10,880 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-01 09:25:10,880 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-01 09:25:10,934 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-01 09:25:10,950 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-01 09:25:10,973 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-01 09:25:10,973 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-01 09:25:10,973 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-01 09:25:10,973 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-01 09:25:10,973 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-01 09:25:10,974 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-01 09:25:10,974 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-01 09:25:10,974 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-01 09:25:10,985 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 38 transitions, 101 flow [2021-07-01 09:25:11,376 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5375 states, 765 states have (on average 3.762091503267974) internal successors, (2878), 766 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 09:25:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 5375 states, 765 states have (on average 3.762091503267974) internal successors, (2878), 766 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 09:25:11,396 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-01 09:25:11,397 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/2) [2021-07-01 09:25:11,398 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-01 09:25:11,403 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-01 09:25:11,403 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-01 09:25:11,404 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-01 09:25:11,404 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-01 09:25:11,404 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-01 09:25:11,404 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-01 09:25:11,404 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-01 09:25:11,404 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadWithAssertThread1of1ForFork1======== [2021-07-01 09:25:11,407 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 38 transitions, 101 flow [2021-07-01 09:25:11,643 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5375 states, 4480 states have (on average 5.214508928571429) internal successors, (23361), 4480 states have internal predecessors, (23361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 09:25:11,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 5375 states, 4480 states have (on average 5.214508928571429) internal successors, (23361), 4480 states have internal predecessors, (23361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 09:25:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-01 09:25:11,666 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 09:25:11,666 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:25:11,667 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:25:11,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:25:11,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1029635733, now seen corresponding path program 1 times [2021-07-01 09:25:11,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:25:11,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563331734] [2021-07-01 09:25:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:25:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:25:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:25:11,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:25:11,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563331734] [2021-07-01 09:25:11,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563331734] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 09:25:11,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 09:25:11,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-01 09:25:11,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432360930] [2021-07-01 09:25:11,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-01 09:25:11,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:25:11,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-01 09:25:11,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-01 09:25:11,806 INFO L87 Difference]: Start difference. First operand has 5375 states, 4480 states have (on average 5.214508928571429) internal successors, (23361), 4480 states have internal predecessors, (23361), 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 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 09:25:11,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 09:25:11,903 INFO L93 Difference]: Finished difference Result 5077 states and 25977 transitions. [2021-07-01 09:25:11,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-01 09:25:11,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-07-01 09:25:11,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 09:25:11,952 INFO L225 Difference]: With dead ends: 5077 [2021-07-01 09:25:11,953 INFO L226 Difference]: Without dead ends: 3885 [2021-07-01 09:25:11,954 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-01 09:25:11,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-07-01 09:25:12,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3885. [2021-07-01 09:25:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 5.11096807415036) internal successors, (19851), 3884 states have internal predecessors, (19851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 09:25:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 19851 transitions. [2021-07-01 09:25:12,230 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 19851 transitions. Word has length 9 [2021-07-01 09:25:12,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-01 09:25:12,230 INFO L482 AbstractCegarLoop]: Abstraction has 3885 states and 19851 transitions. [2021-07-01 09:25:12,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 09:25:12,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 19851 transitions. [2021-07-01 09:25:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-01 09:25:12,234 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 09:25:12,234 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:25:12,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-01 09:25:12,235 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:25:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:25:12,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2102840819, now seen corresponding path program 1 times [2021-07-01 09:25:12,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:25:12,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863592898] [2021-07-01 09:25:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:25:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:25:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:25:12,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:25:12,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863592898] [2021-07-01 09:25:12,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863592898] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 09:25:12,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 09:25:12,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-01 09:25:12,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654293069] [2021-07-01 09:25:12,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-01 09:25:12,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:25:12,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-01 09:25:12,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-01 09:25:12,351 INFO L87 Difference]: Start difference. First operand 3885 states and 19851 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 09:25:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 09:25:12,490 INFO L93 Difference]: Finished difference Result 6641 states and 34107 transitions. [2021-07-01 09:25:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-01 09:25:12,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-01 09:25:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 09:25:12,554 INFO L225 Difference]: With dead ends: 6641 [2021-07-01 09:25:12,555 INFO L226 Difference]: Without dead ends: 6641 [2021-07-01 09:25:12,556 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-01 09:25:12,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6641 states. [2021-07-01 09:25:12,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6641 to 6585. [2021-07-01 09:25:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6585 states, 6584 states have (on average 5.148086269744836) internal successors, (33895), 6584 states have internal predecessors, (33895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 09:25:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6585 states to 6585 states and 33895 transitions. [2021-07-01 09:25:12,885 INFO L78 Accepts]: Start accepts. Automaton has 6585 states and 33895 transitions. Word has length 13 [2021-07-01 09:25:12,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-01 09:25:12,885 INFO L482 AbstractCegarLoop]: Abstraction has 6585 states and 33895 transitions. [2021-07-01 09:25:12,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 09:25:12,886 INFO L276 IsEmpty]: Start isEmpty. Operand 6585 states and 33895 transitions. [2021-07-01 09:25:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-01 09:25:12,888 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 09:25:12,888 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:25:12,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-01 09:25:12,889 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:25:12,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:25:12,890 INFO L82 PathProgramCache]: Analyzing trace with hash 2118034229, now seen corresponding path program 2 times [2021-07-01 09:25:12,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:25:12,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592740704] [2021-07-01 09:25:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:25:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-01 09:25:12,904 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-01 09:25:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-01 09:25:12,917 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-01 09:25:12,930 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-01 09:25:12,930 INFO L605 BasicCegarLoop]: Counterexample might be feasible [2021-07-01 09:25:12,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-01 09:25:12,931 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadWithAssertThread1of1ForFork1 was UNSAFE (2/2) [2021-07-01 09:25:12,932 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-01 09:25:12,943 INFO L202 PluginConnector]: Adding new model bluetooth-incorrect04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 09:25:12 BasicIcfg [2021-07-01 09:25:12,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-01 09:25:12,945 INFO L168 Benchmark]: Toolchain (without parser) took 2445.40 ms. Allocated memory was 195.0 MB in the beginning and 505.4 MB in the end (delta: 310.4 MB). Free memory was 174.5 MB in the beginning and 365.2 MB in the end (delta: -190.7 MB). Peak memory consumption was 120.7 MB. Max. memory is 8.0 GB. [2021-07-01 09:25:12,945 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory is still 175.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-01 09:25:12,946 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.48 ms. Allocated memory is still 195.0 MB. Free memory was 174.4 MB in the beginning and 172.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-01 09:25:12,946 INFO L168 Benchmark]: Boogie Preprocessor took 9.70 ms. Allocated memory is still 195.0 MB. Free memory was 172.7 MB in the beginning and 171.8 MB in the end (delta: 932.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-01 09:25:12,947 INFO L168 Benchmark]: RCFGBuilder took 338.41 ms. Allocated memory is still 195.0 MB. Free memory was 171.6 MB in the beginning and 157.1 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-07-01 09:25:12,950 INFO L168 Benchmark]: TraceAbstraction took 2071.16 ms. Allocated memory was 195.0 MB in the beginning and 505.4 MB in the end (delta: 310.4 MB). Free memory was 156.7 MB in the beginning and 365.2 MB in the end (delta: -208.5 MB). Peak memory consumption was 102.9 MB. Max. memory is 8.0 GB. [2021-07-01 09:25:12,952 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 195.0 MB. Free memory is still 175.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.48 ms. Allocated memory is still 195.0 MB. Free memory was 174.4 MB in the beginning and 172.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 9.70 ms. Allocated memory is still 195.0 MB. Free memory was 172.7 MB in the beginning and 171.8 MB in the end (delta: 932.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 338.41 ms. Allocated memory is still 195.0 MB. Free memory was 171.6 MB in the beginning and 157.1 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2071.16 ms. Allocated memory was 195.0 MB in the beginning and 505.4 MB in the end (delta: 310.4 MB). Free memory was 156.7 MB in the beginning and 365.2 MB in the end (delta: -208.5 MB). Peak memory consumption was 102.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: assertion can be violated assertion can be violated We found a FailurePath: [L14] 0 pendingIo := 1; VAL [pendingIo=1] [L15] 0 stopped := false; VAL [pendingIo=1, stopped=false] [L16] 0 stoppingEvent := false; VAL [pendingIo=1, stopped=false, stoppingEvent=false] [L17] 0 stoppingFlag := false; VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L19] FORK 0 fork 0 ServerThread(); VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L21] FORK 0 fork 1 DeviceThreadWithAssert(); VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L59] 2 assume !stoppingFlag; VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=false] [L81] 1 stoppingFlag := true; VAL [pendingIo=1, stopped=false, stoppingEvent=false, stoppingFlag=true] [L91] 1 pendingIo := pendingIo - 1; [L92] COND TRUE 1 pendingIo == 0 [L93] 1 stoppingEvent := true; VAL [pendingIo=0, stopped=false, stoppingEvent=true, stoppingFlag=true] [L60] 2 pendingIo := pendingIo + 1; VAL [pendingIo=1, stopped=false, stoppingEvent=true, stoppingFlag=true] [L83] 1 assume stoppingEvent; VAL [pendingIo=1, stopped=false, stoppingEvent=true, stoppingFlag=true] [L84] 1 stopped := true; VAL [pendingIo=1, stopped=true, stoppingEvent=true, stoppingFlag=true] [L37] 2 assert !stopped; VAL [pendingIo=1, stopped=true, stoppingEvent=true, stoppingFlag=true] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 56 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 425.2ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 19.4ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 402.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5375occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadWithAssertThread1of1ForFork1 with 1 thread instances CFG has 9 procedures, 56 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1527.3ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 28.1ms, AutomataDifference: 376.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 239.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 67 SDtfs, 70 SDslu, 80 SDs, 0 SdLazy, 39 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 48.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6585occurred in iteration=2, 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: 595.9ms AutomataMinimizationTime, 2 MinimizatonAttempts, 56 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 13.8ms SsaConstructionTime, 29.5ms SatisfiabilityAnalysisTime, 126.1ms InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 67 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...