/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.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d310483fe8b4879eee5de19363f50e4b839cc4ec-d310483 [2021-06-24 17:53:21,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-24 17:53:21,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-24 17:53:21,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-24 17:53:21,246 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 17:53:21,282 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-24 17:53:21,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-24 17:53:21,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-24 17:53:21,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-24 17:53:21,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-24 17:53:21,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-24 17:53:21,284 INFO L138 SettingsManager]: * Use SBE=true [2021-06-24 17:53:21,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-24 17:53:21,285 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-24 17:53:21,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-24 17:53:21,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-24 17:53:21,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-24 17:53:21,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-24 17:53:21,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-24 17:53:21,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-24 17:53:21,286 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-24 17:53:21,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-24 17:53:21,286 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-24 17:53:21,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-24 17:53:21,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-24 17:53:21,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-24 17:53:21,286 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-24 17:53:21,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-24 17:53:21,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 17:53:21,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-24 17:53:21,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-24 17:53:21,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-24 17:53:21,287 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-24 17:53:21,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-24 17:53:21,288 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-24 17:53:21,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-24 17:53:21,288 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-24 17:53:21,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-24 17:53:21,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-24 17:53:21,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-24 17:53:21,805 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-24 17:53:21,807 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-24 17:53:21,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth04.bpl [2021-06-24 17:53:21,808 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth04.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 17:53:21,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-24 17:53:21,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-24 17:53:21,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-24 17:53:21,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-24 17:53:21,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-24 17:53:21,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-24 17:53:21,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-24 17:53:21,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-24 17:53:21,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-24 17:53:21,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-24 17:53:21,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-24 17:53:21,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth04.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 17:53:22,024 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-06-24 17:53:22,024 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-06-24 17:53:22,024 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-06-24 17:53:22,024 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-06-24 17:53:22,024 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-06-24 17:53:22,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-06-24 17:53:22,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-24 17:53:22,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-24 17:53:22,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-24 17:53:22,026 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 17:53:22,190 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-24 17:53:22,191 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-06-24 17:53:22,191 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-06-24 17:53:22,193 INFO L202 PluginConnector]: Adding new model bluetooth04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 05:53:22 BoogieIcfgContainer [2021-06-24 17:53:22,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-24 17:53:22,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-24 17:53:22,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-24 17:53:22,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-24 17:53:22,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/2) ... [2021-06-24 17:53:22,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e07cd39 and model type bluetooth04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 05:53:22, skipping insertion in model container [2021-06-24 17:53:22,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 05:53:22" (2/2) ... [2021-06-24 17:53:22,199 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth04.bpl [2021-06-24 17:53:22,207 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-24 17:53:22,207 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-24 17:53:22,208 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-24 17:53:22,209 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-24 17:53:22,284 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-24 17:53:22,315 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-24 17:53:22,331 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 17:53:22,331 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 17:53:22,331 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 17:53:22,331 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 17:53:22,332 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 17:53:22,332 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 17:53:22,332 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 17:53:22,332 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-24 17:53:22,342 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 17:53:23,679 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8441 states, 933 states have (on average 3.8060021436227225) internal successors, (3551), 940 states have internal predecessors, (3551), 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 17:53:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 8441 states, 933 states have (on average 3.8060021436227225) internal successors, (3551), 940 states have internal predecessors, (3551), 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 17:53:23,703 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 17:53:23,704 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/5) [2021-06-24 17:53:23,706 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 17:53:23,709 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 17:53:23,709 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 17:53:23,709 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 17:53:23,710 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 17:53:23,710 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 17:53:23,710 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 17:53:23,710 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 17:53:23,710 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork4======== [2021-06-24 17:53:23,712 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 17:53:24,429 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8441 states, 6933 states have (on average 5.235972883311698) internal successors, (36301), 6940 states have internal predecessors, (36301), 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 17:53:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand has 8441 states, 6933 states have (on average 5.235972883311698) internal successors, (36301), 6940 states have internal predecessors, (36301), 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 17:53:24,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-24 17:53:24,453 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:24,454 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:24,454 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:24,459 INFO L82 PathProgramCache]: Analyzing trace with hash -403325960, now seen corresponding path program 1 times [2021-06-24 17:53:24,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:24,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047172327] [2021-06-24 17:53:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:24,586 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 17:53:24,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:24,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047172327] [2021-06-24 17:53:24,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047172327] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:24,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:24,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 17:53:24,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13087509] [2021-06-24 17:53:24,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:53:24,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:24,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:53:24,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:24,622 INFO L87 Difference]: Start difference. First operand has 8441 states, 6933 states have (on average 5.235972883311698) internal successors, (36301), 6940 states have internal predecessors, (36301), 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 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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 17:53:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:24,828 INFO L93 Difference]: Finished difference Result 6493 states and 30813 transitions. [2021-06-24 17:53:24,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:53:24,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2021-06-24 17:53:24,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:24,901 INFO L225 Difference]: With dead ends: 6493 [2021-06-24 17:53:24,902 INFO L226 Difference]: Without dead ends: 4689 [2021-06-24 17:53:24,903 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4689 states. [2021-06-24 17:53:25,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4689 to 4661. [2021-06-24 17:53:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4653 states have (on average 4.614012465076295) internal successors, (21469), 4660 states have internal predecessors, (21469), 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 17:53:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 21469 transitions. [2021-06-24 17:53:25,312 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 21469 transitions. Word has length 11 [2021-06-24 17:53:25,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:25,313 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 21469 transitions. [2021-06-24 17:53:25,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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 17:53:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 21469 transitions. [2021-06-24 17:53:25,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-24 17:53:25,322 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:25,323 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:25,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-24 17:53:25,323 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:25,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1064204598, now seen corresponding path program 1 times [2021-06-24 17:53:25,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:25,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958917413] [2021-06-24 17:53:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:25,493 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 17:53:25,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:25,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958917413] [2021-06-24 17:53:25,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958917413] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:25,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:25,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 17:53:25,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422729392] [2021-06-24 17:53:25,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 17:53:25,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:25,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 17:53:25,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:53:25,500 INFO L87 Difference]: Start difference. First operand 4661 states and 21469 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 17:53:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:25,718 INFO L93 Difference]: Finished difference Result 7135 states and 34057 transitions. [2021-06-24 17:53:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 17:53:25,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2021-06-24 17:53:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:25,878 INFO L225 Difference]: With dead ends: 7135 [2021-06-24 17:53:25,879 INFO L226 Difference]: Without dead ends: 7135 [2021-06-24 17:53:25,881 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:53:25,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7135 states. [2021-06-24 17:53:26,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7135 to 6983. [2021-06-24 17:53:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6983 states, 6975 states have (on average 4.7938351254480285) internal successors, (33437), 6982 states have internal predecessors, (33437), 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 17:53:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6983 states to 6983 states and 33437 transitions. [2021-06-24 17:53:26,404 INFO L78 Accepts]: Start accepts. Automaton has 6983 states and 33437 transitions. Word has length 15 [2021-06-24 17:53:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:26,404 INFO L482 AbstractCegarLoop]: Abstraction has 6983 states and 33437 transitions. [2021-06-24 17:53:26,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 17:53:26,405 INFO L276 IsEmpty]: Start isEmpty. Operand 6983 states and 33437 transitions. [2021-06-24 17:53:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-24 17:53:26,438 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:26,438 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:26,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-24 17:53:26,439 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:26,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1608486168, now seen corresponding path program 2 times [2021-06-24 17:53:26,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:26,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100816292] [2021-06-24 17:53:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:26,491 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 17:53:26,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:26,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100816292] [2021-06-24 17:53:26,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100816292] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:26,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:26,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 17:53:26,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980115991] [2021-06-24 17:53:26,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:53:26,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:26,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:53:26,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:26,499 INFO L87 Difference]: Start difference. First operand 6983 states and 33437 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 17:53:26,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:26,601 INFO L93 Difference]: Finished difference Result 6621 states and 27005 transitions. [2021-06-24 17:53:26,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:53:26,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 15 [2021-06-24 17:53:26,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:26,620 INFO L225 Difference]: With dead ends: 6621 [2021-06-24 17:53:26,620 INFO L226 Difference]: Without dead ends: 3369 [2021-06-24 17:53:26,620 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:26,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2021-06-24 17:53:26,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 3071. [2021-06-24 17:53:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3071 states, 3063 states have (on average 4.025791707476331) internal successors, (12331), 3070 states have internal predecessors, (12331), 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 17:53:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3071 states to 3071 states and 12331 transitions. [2021-06-24 17:53:26,823 INFO L78 Accepts]: Start accepts. Automaton has 3071 states and 12331 transitions. Word has length 15 [2021-06-24 17:53:26,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:26,823 INFO L482 AbstractCegarLoop]: Abstraction has 3071 states and 12331 transitions. [2021-06-24 17:53:26,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 17:53:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3071 states and 12331 transitions. [2021-06-24 17:53:26,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-24 17:53:26,829 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:26,829 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:26,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-24 17:53:26,830 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:26,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1045576003, now seen corresponding path program 1 times [2021-06-24 17:53:26,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:26,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975917085] [2021-06-24 17:53:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:26,975 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 17:53:26,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:26,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975917085] [2021-06-24 17:53:26,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975917085] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:26,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:26,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 17:53:26,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518091451] [2021-06-24 17:53:26,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 17:53:26,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:26,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 17:53:26,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:53:26,978 INFO L87 Difference]: Start difference. First operand 3071 states and 12331 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 17:53:27,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:27,131 INFO L93 Difference]: Finished difference Result 4559 states and 18627 transitions. [2021-06-24 17:53:27,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 17:53:27,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 18 [2021-06-24 17:53:27,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:27,184 INFO L225 Difference]: With dead ends: 4559 [2021-06-24 17:53:27,201 INFO L226 Difference]: Without dead ends: 4170 [2021-06-24 17:53:27,201 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:53:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2021-06-24 17:53:27,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 3271. [2021-06-24 17:53:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3271 states, 3263 states have (on average 4.030953110634385) internal successors, (13153), 3270 states have internal predecessors, (13153), 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 17:53:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3271 states to 3271 states and 13153 transitions. [2021-06-24 17:53:27,438 INFO L78 Accepts]: Start accepts. Automaton has 3271 states and 13153 transitions. Word has length 18 [2021-06-24 17:53:27,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:27,438 INFO L482 AbstractCegarLoop]: Abstraction has 3271 states and 13153 transitions. [2021-06-24 17:53:27,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 17:53:27,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3271 states and 13153 transitions. [2021-06-24 17:53:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-24 17:53:27,444 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:27,445 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:27,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-24 17:53:27,445 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:27,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:27,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1992665990, now seen corresponding path program 1 times [2021-06-24 17:53:27,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:27,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689577566] [2021-06-24 17:53:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:27,547 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 17:53:27,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:27,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689577566] [2021-06-24 17:53:27,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689577566] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:27,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:27,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 17:53:27,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240605773] [2021-06-24 17:53:27,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 17:53:27,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:27,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 17:53:27,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:53:27,549 INFO L87 Difference]: Start difference. First operand 3271 states and 13153 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 17:53:27,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:27,679 INFO L93 Difference]: Finished difference Result 4455 states and 18137 transitions. [2021-06-24 17:53:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 17:53:27,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 21 [2021-06-24 17:53:27,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:27,695 INFO L225 Difference]: With dead ends: 4455 [2021-06-24 17:53:27,695 INFO L226 Difference]: Without dead ends: 3398 [2021-06-24 17:53:27,696 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:53:27,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2021-06-24 17:53:27,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 2747. [2021-06-24 17:53:27,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2739 states have (on average 3.9576487769258852) internal successors, (10840), 2746 states have internal predecessors, (10840), 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 17:53:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 10840 transitions. [2021-06-24 17:53:27,807 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 10840 transitions. Word has length 21 [2021-06-24 17:53:27,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:27,808 INFO L482 AbstractCegarLoop]: Abstraction has 2747 states and 10840 transitions. [2021-06-24 17:53:27,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 17:53:27,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 10840 transitions. [2021-06-24 17:53:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 17:53:27,813 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:27,813 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:27,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-24 17:53:27,813 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:27,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:27,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2092218478, now seen corresponding path program 1 times [2021-06-24 17:53:27,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:27,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224280990] [2021-06-24 17:53:27,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:27,938 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 17:53:27,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:27,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224280990] [2021-06-24 17:53:27,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224280990] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:27,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:27,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 17:53:27,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882753413] [2021-06-24 17:53:27,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 17:53:27,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:27,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 17:53:27,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:53:27,942 INFO L87 Difference]: Start difference. First operand 2747 states and 10840 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 17:53:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:28,057 INFO L93 Difference]: Finished difference Result 1403 states and 5948 transitions. [2021-06-24 17:53:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 17:53:28,058 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 24 [2021-06-24 17:53:28,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:28,058 INFO L225 Difference]: With dead ends: 1403 [2021-06-24 17:53:28,059 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 17:53:28,060 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:53:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 17:53:28,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 17:53:28,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 17:53:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 17:53:28,061 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-24 17:53:28,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:28,061 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 17:53:28,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 17:53:28,062 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 17:53:28,062 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 17:53:28,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-24 17:53:28,062 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork4 was SAFE (2/5) [2021-06-24 17:53:28,062 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 17:53:28,063 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 17:53:28,063 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 17:53:28,063 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 17:53:28,063 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 17:53:28,063 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 17:53:28,063 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 17:53:28,064 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 17:53:28,064 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork2======== [2021-06-24 17:53:28,068 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 17:53:28,610 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8441 states, 6753 states have (on average 5.251147638086776) internal successors, (35461), 6760 states have internal predecessors, (35461), 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 17:53:28,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 8441 states, 6753 states have (on average 5.251147638086776) internal successors, (35461), 6760 states have internal predecessors, (35461), 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 17:53:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-24 17:53:28,629 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:28,629 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:28,630 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:28,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:28,630 INFO L82 PathProgramCache]: Analyzing trace with hash 799578582, now seen corresponding path program 1 times [2021-06-24 17:53:28,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:28,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899340029] [2021-06-24 17:53:28,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:28,650 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 17:53:28,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:28,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899340029] [2021-06-24 17:53:28,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899340029] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:28,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:28,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 17:53:28,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031012835] [2021-06-24 17:53:28,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:53:28,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:28,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:53:28,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:28,671 INFO L87 Difference]: Start difference. First operand has 8441 states, 6753 states have (on average 5.251147638086776) internal successors, (35461), 6760 states have internal predecessors, (35461), 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) [2021-06-24 17:53:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:28,745 INFO L93 Difference]: Finished difference Result 6293 states and 29931 transitions. [2021-06-24 17:53:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:53:28,745 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 [2021-06-24 17:53:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:28,769 INFO L225 Difference]: With dead ends: 6293 [2021-06-24 17:53:28,769 INFO L226 Difference]: Without dead ends: 4605 [2021-06-24 17:53:28,770 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:28,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-06-24 17:53:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 4577. [2021-06-24 17:53:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4577 states, 4569 states have (on average 4.605165244035894) internal successors, (21041), 4576 states have internal predecessors, (21041), 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 17:53:29,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4577 states to 4577 states and 21041 transitions. [2021-06-24 17:53:29,042 INFO L78 Accepts]: Start accepts. Automaton has 4577 states and 21041 transitions. Word has length 9 [2021-06-24 17:53:29,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:29,042 INFO L482 AbstractCegarLoop]: Abstraction has 4577 states and 21041 transitions. [2021-06-24 17:53:29,042 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) [2021-06-24 17:53:29,043 INFO L276 IsEmpty]: Start isEmpty. Operand 4577 states and 21041 transitions. [2021-06-24 17:53:29,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-24 17:53:29,046 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:29,046 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:29,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-24 17:53:29,046 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:29,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:29,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1404114154, now seen corresponding path program 1 times [2021-06-24 17:53:29,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:29,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100002651] [2021-06-24 17:53:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:29,073 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 17:53:29,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:29,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100002651] [2021-06-24 17:53:29,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100002651] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:29,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:29,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 17:53:29,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574806746] [2021-06-24 17:53:29,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:53:29,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:29,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:53:29,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:29,075 INFO L87 Difference]: Start difference. First operand 4577 states and 21041 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2021-06-24 17:53:29,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:29,119 INFO L93 Difference]: Finished difference Result 4541 states and 17379 transitions. [2021-06-24 17:53:29,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:53:29,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 [2021-06-24 17:53:29,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:29,131 INFO L225 Difference]: With dead ends: 4541 [2021-06-24 17:53:29,131 INFO L226 Difference]: Without dead ends: 2506 [2021-06-24 17:53:29,131 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:29,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-06-24 17:53:29,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2246. [2021-06-24 17:53:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2238 states have (on average 3.78686327077748) internal successors, (8475), 2245 states have internal predecessors, (8475), 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 17:53:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 8475 transitions. [2021-06-24 17:53:29,213 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 8475 transitions. Word has length 13 [2021-06-24 17:53:29,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:29,213 INFO L482 AbstractCegarLoop]: Abstraction has 2246 states and 8475 transitions. [2021-06-24 17:53:29,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2021-06-24 17:53:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 8475 transitions. [2021-06-24 17:53:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-24 17:53:29,215 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:29,215 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:29,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-24 17:53:29,215 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:29,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:29,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1805860204, now seen corresponding path program 2 times [2021-06-24 17:53:29,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:29,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454089404] [2021-06-24 17:53:29,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:29,244 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 17:53:29,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:29,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454089404] [2021-06-24 17:53:29,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454089404] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:29,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:29,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 17:53:29,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325760199] [2021-06-24 17:53:29,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 17:53:29,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 17:53:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:53:29,246 INFO L87 Difference]: Start difference. First operand 2246 states and 8475 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) [2021-06-24 17:53:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:29,308 INFO L93 Difference]: Finished difference Result 3490 states and 13778 transitions. [2021-06-24 17:53:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 17:53:29,309 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 [2021-06-24 17:53:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:29,322 INFO L225 Difference]: With dead ends: 3490 [2021-06-24 17:53:29,323 INFO L226 Difference]: Without dead ends: 3440 [2021-06-24 17:53:29,323 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:53:29,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-06-24 17:53:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3238. [2021-06-24 17:53:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3230 states have (on average 3.9925696594427245) internal successors, (12896), 3237 states have internal predecessors, (12896), 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 17:53:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 12896 transitions. [2021-06-24 17:53:29,493 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 12896 transitions. Word has length 13 [2021-06-24 17:53:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:29,494 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 12896 transitions. [2021-06-24 17:53:29,494 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) [2021-06-24 17:53:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 12896 transitions. [2021-06-24 17:53:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 17:53:29,498 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:29,498 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:29,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-24 17:53:29,498 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:29,499 INFO L82 PathProgramCache]: Analyzing trace with hash -222121371, now seen corresponding path program 1 times [2021-06-24 17:53:29,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:29,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56812284] [2021-06-24 17:53:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:29,554 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 17:53:29,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:29,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56812284] [2021-06-24 17:53:29,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56812284] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:29,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:29,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 17:53:29,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442213290] [2021-06-24 17:53:29,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 17:53:29,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:29,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 17:53:29,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:53:29,556 INFO L87 Difference]: Start difference. First operand 3238 states and 12896 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 17:53:29,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:29,643 INFO L93 Difference]: Finished difference Result 4726 states and 19195 transitions. [2021-06-24 17:53:29,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 17:53:29,644 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 17:53:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:29,661 INFO L225 Difference]: With dead ends: 4726 [2021-06-24 17:53:29,662 INFO L226 Difference]: Without dead ends: 4304 [2021-06-24 17:53:29,662 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:53:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2021-06-24 17:53:29,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 3415. [2021-06-24 17:53:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 3407 states have (on average 4.006457293806868) internal successors, (13650), 3414 states have internal predecessors, (13650), 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 17:53:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 13650 transitions. [2021-06-24 17:53:29,782 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 13650 transitions. Word has length 16 [2021-06-24 17:53:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:29,783 INFO L482 AbstractCegarLoop]: Abstraction has 3415 states and 13650 transitions. [2021-06-24 17:53:29,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 17:53:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 13650 transitions. [2021-06-24 17:53:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 17:53:29,789 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:29,789 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:29,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-24 17:53:29,789 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:29,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:29,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1875386057, now seen corresponding path program 1 times [2021-06-24 17:53:29,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:29,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911131577] [2021-06-24 17:53:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:29,845 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 17:53:29,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:29,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911131577] [2021-06-24 17:53:29,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911131577] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:29,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:29,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 17:53:29,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529106326] [2021-06-24 17:53:29,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 17:53:29,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:29,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 17:53:29,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:53:29,847 INFO L87 Difference]: Start difference. First operand 3415 states and 13650 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 17:53:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:29,963 INFO L93 Difference]: Finished difference Result 4471 states and 18184 transitions. [2021-06-24 17:53:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 17:53:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 20 [2021-06-24 17:53:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:29,988 INFO L225 Difference]: With dead ends: 4471 [2021-06-24 17:53:29,988 INFO L226 Difference]: Without dead ends: 3398 [2021-06-24 17:53:29,990 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:53:30,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2021-06-24 17:53:30,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 2747. [2021-06-24 17:53:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2739 states have (on average 3.9576487769258852) internal successors, (10840), 2746 states have internal predecessors, (10840), 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 17:53:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 10840 transitions. [2021-06-24 17:53:30,124 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 10840 transitions. Word has length 20 [2021-06-24 17:53:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:30,125 INFO L482 AbstractCegarLoop]: Abstraction has 2747 states and 10840 transitions. [2021-06-24 17:53:30,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 17:53:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 10840 transitions. [2021-06-24 17:53:30,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 17:53:30,128 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:30,129 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:30,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-24 17:53:30,129 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:30,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1099093723, now seen corresponding path program 1 times [2021-06-24 17:53:30,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:30,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866911563] [2021-06-24 17:53:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:30,225 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 17:53:30,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:30,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866911563] [2021-06-24 17:53:30,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866911563] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:30,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:30,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 17:53:30,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311574020] [2021-06-24 17:53:30,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 17:53:30,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:30,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 17:53:30,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:53:30,228 INFO L87 Difference]: Start difference. First operand 2747 states and 10840 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 17:53:30,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:30,315 INFO L93 Difference]: Finished difference Result 1403 states and 5948 transitions. [2021-06-24 17:53:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 17:53:30,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 24 [2021-06-24 17:53:30,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:30,316 INFO L225 Difference]: With dead ends: 1403 [2021-06-24 17:53:30,317 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 17:53:30,317 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:53:30,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 17:53:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 17:53:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 17:53:30,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 17:53:30,317 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-24 17:53:30,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:30,317 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 17:53:30,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 17:53:30,318 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 17:53:30,318 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 17:53:30,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-24 17:53:30,318 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork2 was SAFE (3/5) [2021-06-24 17:53:30,319 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 17:53:30,320 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 17:53:30,320 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 17:53:30,320 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 17:53:30,320 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 17:53:30,320 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 17:53:30,320 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 17:53:30,320 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 17:53:30,320 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork3======== [2021-06-24 17:53:30,322 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 17:53:30,845 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8441 states, 6783 states have (on average 5.244876898127672) internal successors, (35576), 6790 states have internal predecessors, (35576), 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 17:53:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand has 8441 states, 6783 states have (on average 5.244876898127672) internal successors, (35576), 6790 states have internal predecessors, (35576), 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 17:53:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-24 17:53:30,862 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:30,863 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:30,863 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:30,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:30,863 INFO L82 PathProgramCache]: Analyzing trace with hash -982842544, now seen corresponding path program 1 times [2021-06-24 17:53:30,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:30,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937441179] [2021-06-24 17:53:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:30,877 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 17:53:30,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:30,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937441179] [2021-06-24 17:53:30,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937441179] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:30,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:30,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 17:53:30,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441458818] [2021-06-24 17:53:30,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:53:30,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:30,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:53:30,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:30,895 INFO L87 Difference]: Start difference. First operand has 8441 states, 6783 states have (on average 5.244876898127672) internal successors, (35576), 6790 states have internal predecessors, (35576), 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 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 17:53:30,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:30,990 INFO L93 Difference]: Finished difference Result 6329 states and 30063 transitions. [2021-06-24 17:53:30,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:53:30,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2021-06-24 17:53:30,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:31,014 INFO L225 Difference]: With dead ends: 6329 [2021-06-24 17:53:31,015 INFO L226 Difference]: Without dead ends: 4623 [2021-06-24 17:53:31,015 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4623 states. [2021-06-24 17:53:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4623 to 4595. [2021-06-24 17:53:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 4587 states have (on average 4.603444517113582) internal successors, (21116), 4594 states have internal predecessors, (21116), 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 17:53:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 21116 transitions. [2021-06-24 17:53:31,214 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 21116 transitions. Word has length 10 [2021-06-24 17:53:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:31,215 INFO L482 AbstractCegarLoop]: Abstraction has 4595 states and 21116 transitions. [2021-06-24 17:53:31,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 17:53:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 21116 transitions. [2021-06-24 17:53:31,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-24 17:53:31,219 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:31,220 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:31,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-24 17:53:31,220 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:31,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1453167954, now seen corresponding path program 1 times [2021-06-24 17:53:31,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:31,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230759424] [2021-06-24 17:53:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:31,233 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 17:53:31,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:31,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230759424] [2021-06-24 17:53:31,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230759424] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:31,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:31,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 17:53:31,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232626188] [2021-06-24 17:53:31,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:53:31,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:31,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:53:31,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:31,235 INFO L87 Difference]: Start difference. First operand 4595 states and 21116 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 17:53:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:31,276 INFO L93 Difference]: Finished difference Result 4561 states and 17456 transitions. [2021-06-24 17:53:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:53:31,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2021-06-24 17:53:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:31,287 INFO L225 Difference]: With dead ends: 4561 [2021-06-24 17:53:31,288 INFO L226 Difference]: Without dead ends: 2472 [2021-06-24 17:53:31,288 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:31,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-06-24 17:53:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2218. [2021-06-24 17:53:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2210 states have (on average 3.799095022624434) internal successors, (8396), 2217 states have internal predecessors, (8396), 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 17:53:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 8396 transitions. [2021-06-24 17:53:31,363 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 8396 transitions. Word has length 14 [2021-06-24 17:53:31,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:31,364 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 8396 transitions. [2021-06-24 17:53:31,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 17:53:31,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 8396 transitions. [2021-06-24 17:53:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-24 17:53:31,367 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:31,367 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:31,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-24 17:53:31,367 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1194551694, now seen corresponding path program 2 times [2021-06-24 17:53:31,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:31,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490395131] [2021-06-24 17:53:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:31,399 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 17:53:31,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:31,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490395131] [2021-06-24 17:53:31,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490395131] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:31,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:31,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 17:53:31,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864591558] [2021-06-24 17:53:31,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 17:53:31,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:31,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 17:53:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:53:31,401 INFO L87 Difference]: Start difference. First operand 2218 states and 8396 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 17:53:31,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:31,458 INFO L93 Difference]: Finished difference Result 3458 states and 13688 transitions. [2021-06-24 17:53:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 17:53:31,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-06-24 17:53:31,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:31,477 INFO L225 Difference]: With dead ends: 3458 [2021-06-24 17:53:31,477 INFO L226 Difference]: Without dead ends: 3412 [2021-06-24 17:53:31,479 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:53:31,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2021-06-24 17:53:31,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 3212. [2021-06-24 17:53:31,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 3204 states have (on average 4.001560549313358) internal successors, (12821), 3211 states have internal predecessors, (12821), 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 17:53:31,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 12821 transitions. [2021-06-24 17:53:31,585 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 12821 transitions. Word has length 14 [2021-06-24 17:53:31,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:31,586 INFO L482 AbstractCegarLoop]: Abstraction has 3212 states and 12821 transitions. [2021-06-24 17:53:31,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 17:53:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 12821 transitions. [2021-06-24 17:53:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-24 17:53:31,590 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:31,590 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:31,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-24 17:53:31,590 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:31,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1226144075, now seen corresponding path program 1 times [2021-06-24 17:53:31,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:31,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161704164] [2021-06-24 17:53:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:31,658 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 17:53:31,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:31,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161704164] [2021-06-24 17:53:31,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161704164] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:31,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:31,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 17:53:31,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263724056] [2021-06-24 17:53:31,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 17:53:31,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:31,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 17:53:31,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:53:31,661 INFO L87 Difference]: Start difference. First operand 3212 states and 12821 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 17:53:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:31,744 INFO L93 Difference]: Finished difference Result 4724 states and 19189 transitions. [2021-06-24 17:53:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 17:53:31,745 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 17 [2021-06-24 17:53:31,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:31,759 INFO L225 Difference]: With dead ends: 4724 [2021-06-24 17:53:31,759 INFO L226 Difference]: Without dead ends: 4312 [2021-06-24 17:53:31,760 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:53:31,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-06-24 17:53:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 3418. [2021-06-24 17:53:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3418 states, 3410 states have (on average 4.005571847507332) internal successors, (13659), 3417 states have internal predecessors, (13659), 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 17:53:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 13659 transitions. [2021-06-24 17:53:31,883 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 13659 transitions. Word has length 17 [2021-06-24 17:53:31,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:31,883 INFO L482 AbstractCegarLoop]: Abstraction has 3418 states and 13659 transitions. [2021-06-24 17:53:31,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 17:53:31,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 13659 transitions. [2021-06-24 17:53:31,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 17:53:31,887 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:31,887 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:31,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-24 17:53:31,888 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:31,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:31,888 INFO L82 PathProgramCache]: Analyzing trace with hash -311092226, now seen corresponding path program 1 times [2021-06-24 17:53:31,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:31,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571565969] [2021-06-24 17:53:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:31,943 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 17:53:31,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:31,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571565969] [2021-06-24 17:53:31,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571565969] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:31,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:31,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 17:53:31,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137410774] [2021-06-24 17:53:31,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 17:53:31,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:31,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 17:53:31,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:53:31,945 INFO L87 Difference]: Start difference. First operand 3418 states and 13659 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 17:53:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:32,042 INFO L93 Difference]: Finished difference Result 4474 states and 18193 transitions. [2021-06-24 17:53:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 17:53:32,043 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 20 [2021-06-24 17:53:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:32,054 INFO L225 Difference]: With dead ends: 4474 [2021-06-24 17:53:32,055 INFO L226 Difference]: Without dead ends: 3398 [2021-06-24 17:53:32,055 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:53:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2021-06-24 17:53:32,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 2747. [2021-06-24 17:53:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2739 states have (on average 3.9576487769258852) internal successors, (10840), 2746 states have internal predecessors, (10840), 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 17:53:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 10840 transitions. [2021-06-24 17:53:32,154 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 10840 transitions. Word has length 20 [2021-06-24 17:53:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:32,154 INFO L482 AbstractCegarLoop]: Abstraction has 2747 states and 10840 transitions. [2021-06-24 17:53:32,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 17:53:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 10840 transitions. [2021-06-24 17:53:32,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 17:53:32,157 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:32,158 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:32,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-24 17:53:32,158 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:32,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:32,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1577472586, now seen corresponding path program 1 times [2021-06-24 17:53:32,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:32,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953081514] [2021-06-24 17:53:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:32,218 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 17:53:32,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:32,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953081514] [2021-06-24 17:53:32,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953081514] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:32,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:32,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 17:53:32,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582052243] [2021-06-24 17:53:32,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 17:53:32,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:32,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 17:53:32,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:53:32,219 INFO L87 Difference]: Start difference. First operand 2747 states and 10840 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 17:53:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:32,316 INFO L93 Difference]: Finished difference Result 1403 states and 5948 transitions. [2021-06-24 17:53:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 17:53:32,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 24 [2021-06-24 17:53:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:32,317 INFO L225 Difference]: With dead ends: 1403 [2021-06-24 17:53:32,317 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 17:53:32,317 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:53:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 17:53:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 17:53:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 17:53:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 17:53:32,318 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-24 17:53:32,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:32,318 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 17:53:32,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 17:53:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 17:53:32,318 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 17:53:32,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-24 17:53:32,318 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork3 was SAFE (4/5) [2021-06-24 17:53:32,319 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 17:53:32,319 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 17:53:32,319 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 17:53:32,319 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 17:53:32,319 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 17:53:32,320 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 17:53:32,320 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 17:53:32,320 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 17:53:32,320 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork1======== [2021-06-24 17:53:32,321 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 17:53:32,810 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8441 states, 6747 states have (on average 5.253297761968282) internal successors, (35444), 6754 states have internal predecessors, (35444), 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 17:53:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 8441 states, 6747 states have (on average 5.253297761968282) internal successors, (35444), 6754 states have internal predecessors, (35444), 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 17:53:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-24 17:53:32,822 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:32,822 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:32,822 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:32,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2104002414, now seen corresponding path program 1 times [2021-06-24 17:53:32,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:32,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113507828] [2021-06-24 17:53:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:32,830 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 17:53:32,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:32,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113507828] [2021-06-24 17:53:32,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113507828] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:32,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:32,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 17:53:32,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858959966] [2021-06-24 17:53:32,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:53:32,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:32,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:53:32,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:32,845 INFO L87 Difference]: Start difference. First operand has 8441 states, 6747 states have (on average 5.253297761968282) internal successors, (35444), 6754 states have internal predecessors, (35444), 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 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 17:53:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:32,909 INFO L93 Difference]: Finished difference Result 6285 states and 29909 transitions. [2021-06-24 17:53:32,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:53:32,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-06-24 17:53:32,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:32,926 INFO L225 Difference]: With dead ends: 6285 [2021-06-24 17:53:32,926 INFO L226 Difference]: Without dead ends: 4599 [2021-06-24 17:53:32,926 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:32,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2021-06-24 17:53:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 4571. [2021-06-24 17:53:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4563 states have (on average 4.607495069033531) internal successors, (21024), 4570 states have internal predecessors, (21024), 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 17:53:33,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 21024 transitions. [2021-06-24 17:53:33,153 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 21024 transitions. Word has length 8 [2021-06-24 17:53:33,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:33,153 INFO L482 AbstractCegarLoop]: Abstraction has 4571 states and 21024 transitions. [2021-06-24 17:53:33,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 17:53:33,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 21024 transitions. [2021-06-24 17:53:33,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 17:53:33,154 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:33,155 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:33,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-24 17:53:33,155 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:33,156 INFO L82 PathProgramCache]: Analyzing trace with hash -30459604, now seen corresponding path program 1 times [2021-06-24 17:53:33,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:33,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432773799] [2021-06-24 17:53:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:33,181 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 17:53:33,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:33,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432773799] [2021-06-24 17:53:33,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432773799] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:33,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:33,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 17:53:33,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088835950] [2021-06-24 17:53:33,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 17:53:33,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:33,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 17:53:33,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:53:33,183 INFO L87 Difference]: Start difference. First operand 4571 states and 21024 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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 17:53:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:33,269 INFO L93 Difference]: Finished difference Result 6959 states and 33214 transitions. [2021-06-24 17:53:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 17:53:33,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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 17:53:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:33,295 INFO L225 Difference]: With dead ends: 6959 [2021-06-24 17:53:33,295 INFO L226 Difference]: Without dead ends: 6959 [2021-06-24 17:53:33,296 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:53:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6959 states. [2021-06-24 17:53:33,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6959 to 6807. [2021-06-24 17:53:33,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6807 states, 6799 states have (on average 4.793940285336078) internal successors, (32594), 6806 states have internal predecessors, (32594), 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 17:53:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 32594 transitions. [2021-06-24 17:53:33,622 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 32594 transitions. Word has length 12 [2021-06-24 17:53:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:33,622 INFO L482 AbstractCegarLoop]: Abstraction has 6807 states and 32594 transitions. [2021-06-24 17:53:33,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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 17:53:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 32594 transitions. [2021-06-24 17:53:33,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 17:53:33,624 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:33,624 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:33,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-24 17:53:33,624 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:33,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:33,624 INFO L82 PathProgramCache]: Analyzing trace with hash 84831566, now seen corresponding path program 2 times [2021-06-24 17:53:33,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:33,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312439906] [2021-06-24 17:53:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:33,631 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 17:53:33,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:33,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312439906] [2021-06-24 17:53:33,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312439906] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:33,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:33,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 17:53:33,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876769925] [2021-06-24 17:53:33,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:53:33,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:33,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:53:33,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:33,633 INFO L87 Difference]: Start difference. First operand 6807 states and 32594 transitions. Second operand has 3 states, 3 states have (on average 4.0) 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 17:53:33,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:33,687 INFO L93 Difference]: Finished difference Result 6441 states and 26200 transitions. [2021-06-24 17:53:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:53:33,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) 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 17:53:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:33,699 INFO L225 Difference]: With dead ends: 6441 [2021-06-24 17:53:33,699 INFO L226 Difference]: Without dead ends: 3585 [2021-06-24 17:53:33,699 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:33,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-06-24 17:53:33,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 3237. [2021-06-24 17:53:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3229 states have (on average 3.993186745122329) internal successors, (12894), 3236 states have internal predecessors, (12894), 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 17:53:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 12894 transitions. [2021-06-24 17:53:33,887 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 12894 transitions. Word has length 12 [2021-06-24 17:53:33,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:33,887 INFO L482 AbstractCegarLoop]: Abstraction has 3237 states and 12894 transitions. [2021-06-24 17:53:33,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) 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 17:53:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 12894 transitions. [2021-06-24 17:53:33,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 17:53:33,890 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:33,890 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:33,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-24 17:53:33,890 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:33,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:33,890 INFO L82 PathProgramCache]: Analyzing trace with hash -75040697, now seen corresponding path program 1 times [2021-06-24 17:53:33,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:33,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724325744] [2021-06-24 17:53:33,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:33,941 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 17:53:33,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:33,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724325744] [2021-06-24 17:53:33,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724325744] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:33,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:33,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 17:53:33,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938047281] [2021-06-24 17:53:33,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 17:53:33,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:33,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 17:53:33,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:53:33,943 INFO L87 Difference]: Start difference. First operand 3237 states and 12894 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 17:53:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:34,029 INFO L93 Difference]: Finished difference Result 4725 states and 19193 transitions. [2021-06-24 17:53:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 17:53:34,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 17:53:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:34,041 INFO L225 Difference]: With dead ends: 4725 [2021-06-24 17:53:34,042 INFO L226 Difference]: Without dead ends: 4303 [2021-06-24 17:53:34,043 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:53:34,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4303 states. [2021-06-24 17:53:34,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4303 to 3414. [2021-06-24 17:53:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3406 states have (on average 4.007046388725778) internal successors, (13648), 3413 states have internal predecessors, (13648), 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 17:53:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 13648 transitions. [2021-06-24 17:53:34,137 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 13648 transitions. Word has length 16 [2021-06-24 17:53:34,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:34,137 INFO L482 AbstractCegarLoop]: Abstraction has 3414 states and 13648 transitions. [2021-06-24 17:53:34,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 17:53:34,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 13648 transitions. [2021-06-24 17:53:34,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 17:53:34,141 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:34,141 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:34,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-24 17:53:34,142 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:34,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:34,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1600134065, now seen corresponding path program 1 times [2021-06-24 17:53:34,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:34,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231272804] [2021-06-24 17:53:34,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:34,196 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 17:53:34,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:34,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231272804] [2021-06-24 17:53:34,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231272804] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:34,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:34,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 17:53:34,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843270166] [2021-06-24 17:53:34,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 17:53:34,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:34,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 17:53:34,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:53:34,197 INFO L87 Difference]: Start difference. First operand 3414 states and 13648 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 17:53:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:34,353 INFO L93 Difference]: Finished difference Result 4470 states and 18182 transitions. [2021-06-24 17:53:34,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 17:53:34,354 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 20 [2021-06-24 17:53:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:34,363 INFO L225 Difference]: With dead ends: 4470 [2021-06-24 17:53:34,363 INFO L226 Difference]: Without dead ends: 3398 [2021-06-24 17:53:34,364 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:53:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2021-06-24 17:53:34,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 2747. [2021-06-24 17:53:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2739 states have (on average 3.9576487769258852) internal successors, (10840), 2746 states have internal predecessors, (10840), 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 17:53:34,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 10840 transitions. [2021-06-24 17:53:34,429 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 10840 transitions. Word has length 20 [2021-06-24 17:53:34,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:34,430 INFO L482 AbstractCegarLoop]: Abstraction has 2747 states and 10840 transitions. [2021-06-24 17:53:34,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 17:53:34,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 10840 transitions. [2021-06-24 17:53:34,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 17:53:34,432 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:34,433 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:34,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-24 17:53:34,433 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:34,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:34,433 INFO L82 PathProgramCache]: Analyzing trace with hash -100029307, now seen corresponding path program 1 times [2021-06-24 17:53:34,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:34,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565458489] [2021-06-24 17:53:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:34,485 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 17:53:34,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:34,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565458489] [2021-06-24 17:53:34,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565458489] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:34,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:34,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 17:53:34,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135346169] [2021-06-24 17:53:34,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 17:53:34,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:34,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 17:53:34,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:53:34,487 INFO L87 Difference]: Start difference. First operand 2747 states and 10840 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 17:53:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:34,557 INFO L93 Difference]: Finished difference Result 1403 states and 5948 transitions. [2021-06-24 17:53:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 17:53:34,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 24 [2021-06-24 17:53:34,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:34,557 INFO L225 Difference]: With dead ends: 1403 [2021-06-24 17:53:34,557 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 17:53:34,558 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:53:34,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 17:53:34,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 17:53:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 17:53:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 17:53:34,558 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-24 17:53:34,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:34,558 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 17:53:34,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 17:53:34,558 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 17:53:34,558 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 17:53:34,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-24 17:53:34,559 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork1 was SAFE (5/5) [2021-06-24 17:53:34,559 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-24 17:53:34,562 INFO L202 PluginConnector]: Adding new model bluetooth04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 05:53:34 BasicIcfg [2021-06-24 17:53:34,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-24 17:53:34,563 INFO L168 Benchmark]: Toolchain (without parser) took 12722.30 ms. Allocated memory was 212.9 MB in the beginning and 3.0 GB in the end (delta: 2.8 GB). Free memory was 192.8 MB in the beginning and 2.6 GB in the end (delta: -2.4 GB). Peak memory consumption was 416.3 MB. Max. memory is 8.0 GB. [2021-06-24 17:53:34,563 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 212.9 MB. Free memory is still 193.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-24 17:53:34,563 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.36 ms. Allocated memory is still 212.9 MB. Free memory was 192.7 MB in the beginning and 190.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-24 17:53:34,563 INFO L168 Benchmark]: Boogie Preprocessor took 11.80 ms. Allocated memory is still 212.9 MB. Free memory was 190.9 MB in the beginning and 190.0 MB in the end (delta: 848.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-24 17:53:34,563 INFO L168 Benchmark]: RCFGBuilder took 269.99 ms. Allocated memory is still 212.9 MB. Free memory was 189.9 MB in the beginning and 177.0 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-24 17:53:34,563 INFO L168 Benchmark]: TraceAbstraction took 12367.55 ms. Allocated memory was 212.9 MB in the beginning and 3.0 GB in the end (delta: 2.8 GB). Free memory was 176.5 MB in the beginning and 2.6 GB in the end (delta: -2.4 GB). Peak memory consumption was 400.6 MB. Max. memory is 8.0 GB. [2021-06-24 17:53:34,564 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 0.15 ms. Allocated memory is still 212.9 MB. Free memory is still 193.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 33.36 ms. Allocated memory is still 212.9 MB. Free memory was 192.7 MB in the beginning and 190.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.80 ms. Allocated memory is still 212.9 MB. Free memory was 190.9 MB in the beginning and 190.0 MB in the end (delta: 848.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 269.99 ms. Allocated memory is still 212.9 MB. Free memory was 189.9 MB in the beginning and 177.0 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12367.55 ms. Allocated memory was 212.9 MB in the beginning and 3.0 GB in the end (delta: 2.8 GB). Free memory was 176.5 MB in the beginning and 2.6 GB in the end (delta: -2.4 GB). Peak memory consumption was 400.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 35]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 8 procedures, 53 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1374.7ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 23.6ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1347.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8441occurred 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, 53 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4352.9ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 82.0ms, AutomataDifference: 1308.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 719.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 247 SDtfs, 253 SDslu, 348 SDs, 0 SdLazy, 281 SolverSat, 116 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 262.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 224.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8441occurred in iteration=0, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1469.7ms AutomataMinimizationTime, 6 MinimizatonAttempts, 2028 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 28.6ms SsaConstructionTime, 116.1ms SatisfiabilityAnalysisTime, 480.7ms InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 397 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadThread1of1ForFork2 with 1 thread instances CFG has 8 procedures, 53 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2254.8ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 35.3ms, AutomataDifference: 591.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 547.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 246 SDtfs, 316 SDslu, 293 SDs, 0 SdLazy, 246 SolverSat, 149 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 197.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 108.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8441occurred in iteration=0, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 778.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 2030 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 20.3ms SsaConstructionTime, 19.6ms SatisfiabilityAnalysisTime, 229.1ms InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 89 ConstructedInterpolants, 0 QuantifiedInterpolants, 361 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadThread1of1ForFork3 with 1 thread instances CFG has 8 procedures, 53 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1998.4ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 34.9ms, AutomataDifference: 575.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 525.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 246 SDtfs, 313 SDslu, 329 SDs, 0 SdLazy, 277 SolverSat, 149 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 186.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 119.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8441occurred in iteration=0, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 601.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 2027 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.5ms SsaConstructionTime, 11.5ms SatisfiabilityAnalysisTime, 210.4ms InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 93 ConstructedInterpolants, 0 QuantifiedInterpolants, 376 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadThread1of1ForFork1 with 1 thread instances CFG has 8 procedures, 53 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2239.3ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 23.2ms, AutomataDifference: 613.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 490.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 247 SDtfs, 271 SDslu, 353 SDs, 0 SdLazy, 285 SolverSat, 120 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 247.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 97.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8441occurred in iteration=0, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 900.1ms AutomataMinimizationTime, 6 MinimizatonAttempts, 2068 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.5ms SsaConstructionTime, 12.7ms SatisfiabilityAnalysisTime, 168.4ms InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 86 ConstructedInterpolants, 0 QuantifiedInterpolants, 352 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...