/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/bluetooth05.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d310483fe8b4879eee5de19363f50e4b839cc4ec-d310483 [2021-06-24 17:53:20,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-24 17:53:20,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-24 17:53:20,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-24 17:53:20,935 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 17:53:21,285 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-24 17:53:21,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-24 17:53:21,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-24 17:53:21,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-24 17:53:21,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-24 17:53:21,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-24 17:53:21,288 INFO L138 SettingsManager]: * Use SBE=true [2021-06-24 17:53:21,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-24 17:53:21,288 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-24 17:53:21,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-24 17:53:21,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-24 17:53:21,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-24 17:53:21,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-24 17:53:21,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-24 17:53:21,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-24 17:53:21,289 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-24 17:53:21,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-24 17:53:21,290 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-24 17:53:21,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-24 17:53:21,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-24 17:53:21,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-24 17:53:21,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-24 17:53:21,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-24 17:53:21,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 17:53:21,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-24 17:53:21,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-24 17:53:21,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-24 17:53:21,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-24 17:53:21,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-24 17:53:21,291 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-24 17:53:21,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-24 17:53:21,291 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-24 17:53:21,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-24 17:53:21,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-24 17:53:21,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-24 17:53:21,802 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-24 17:53:21,805 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-24 17:53:21,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth05.bpl [2021-06-24 17:53:21,806 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth05.bpl' [2021-06-24 17:53:21,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-24 17:53:21,875 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-24 17:53:21,877 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 17:53:21,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-24 17:53:21,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-24 17:53:21,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-24 17:53:21,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-24 17:53:21,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... [2021-06-24 17:53:21,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth05.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 Preprocessor---------------------------- [2021-06-24 17:53:21,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-24 17:53:21,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-24 17:53:21,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-24 17:53:21,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 17:53:22,020 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-06-24 17:53:22,021 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-06-24 17:53:22,021 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-06-24 17:53:22,021 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-06-24 17:53:22,021 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-06-24 17:53:22,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-06-24 17:53:22,021 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-24 17:53:22,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-24 17:53:22,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-24 17:53:22,022 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-24 17:53:22,242 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-24 17:53:22,242 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-06-24 17:53:22,243 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-06-24 17:53:22,244 INFO L202 PluginConnector]: Adding new model bluetooth05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 05:53:22 BoogieIcfgContainer [2021-06-24 17:53:22,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-24 17:53:22,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-24 17:53:22,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-24 17:53:22,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-24 17:53:22,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 05:53:21" (1/2) ... [2021-06-24 17:53:22,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f84ff8f and model type bluetooth05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 05:53:22, skipping insertion in model container [2021-06-24 17:53:22,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 05:53:22" (2/2) ... [2021-06-24 17:53:22,249 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth05.bpl [2021-06-24 17:53:22,253 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-24 17:53:22,253 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-24 17:53:22,253 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-24 17:53:22,254 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-24 17:53:22,304 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-24 17:53:22,320 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-24 17:53:22,343 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 17:53:22,344 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 17:53:22,344 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 17:53:22,344 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 17:53:22,344 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 17:53:22,344 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 17:53:22,344 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 17:53:22,344 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-24 17:53:22,356 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 47 transitions, 124 flow [2021-06-24 17:53:28,727 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 42191 states, 4675 states have (on average 4.797005347593583) internal successors, (22426), 4690 states have internal predecessors, (22426), 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 17:53:28,740 INFO L276 IsEmpty]: Start isEmpty. Operand has 42191 states, 4675 states have (on average 4.797005347593583) internal successors, (22426), 4690 states have internal predecessors, (22426), 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 17:53:28,772 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 17:53:28,773 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/6) [2021-06-24 17:53:28,774 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 17:53:28,776 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 17:53:28,776 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 17:53:28,776 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 17:53:28,776 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 17:53:28,776 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 17:53:28,776 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 17:53:28,776 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 17:53:28,776 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork4======== [2021-06-24 17:53:28,778 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 47 transitions, 124 flow [2021-06-24 17:53:35,852 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 42191 states, 33925 states have (on average 6.243212969786294) internal successors, (211801), 33940 states have internal predecessors, (211801), 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 17:53:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 42191 states, 33925 states have (on average 6.243212969786294) internal successors, (211801), 33940 states have internal predecessors, (211801), 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 17:53:35,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-24 17:53:35,916 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:35,916 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:35,917 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:35,920 INFO L82 PathProgramCache]: Analyzing trace with hash -783960483, now seen corresponding path program 1 times [2021-06-24 17:53:35,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:35,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172518921] [2021-06-24 17:53:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:36,022 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 17:53:36,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:36,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172518921] [2021-06-24 17:53:36,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172518921] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:36,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:36,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 17:53:36,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782057951] [2021-06-24 17:53:36,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:53:36,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:36,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:53:36,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:36,105 INFO L87 Difference]: Start difference. First operand has 42191 states, 33925 states have (on average 6.243212969786294) internal successors, (211801), 33940 states have internal predecessors, (211801), 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 17:53:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:36,625 INFO L93 Difference]: Finished difference Result 29867 states and 168256 transitions. [2021-06-24 17:53:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:53:36,626 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 17:53:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:36,800 INFO L225 Difference]: With dead ends: 29867 [2021-06-24 17:53:36,800 INFO L226 Difference]: Without dead ends: 21313 [2021-06-24 17:53:36,801 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:37,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21313 states. [2021-06-24 17:53:38,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21313 to 21253. [2021-06-24 17:53:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21253 states, 21237 states have (on average 5.415312897301879) internal successors, (115005), 21252 states have internal predecessors, (115005), 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 17:53:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21253 states to 21253 states and 115005 transitions. [2021-06-24 17:53:38,214 INFO L78 Accepts]: Start accepts. Automaton has 21253 states and 115005 transitions. Word has length 11 [2021-06-24 17:53:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:38,215 INFO L482 AbstractCegarLoop]: Abstraction has 21253 states and 115005 transitions. [2021-06-24 17:53:38,215 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 17:53:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 21253 states and 115005 transitions. [2021-06-24 17:53:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-24 17:53:38,225 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:38,226 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:38,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-24 17:53:38,226 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:38,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1307936677, now seen corresponding path program 1 times [2021-06-24 17:53:38,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:38,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379458999] [2021-06-24 17:53:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:38,294 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 17:53:38,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:38,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379458999] [2021-06-24 17:53:38,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379458999] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:38,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:38,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 17:53:38,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230138568] [2021-06-24 17:53:38,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 17:53:38,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:38,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 17:53:38,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:53:38,296 INFO L87 Difference]: Start difference. First operand 21253 states and 115005 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 17:53:38,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:38,863 INFO L93 Difference]: Finished difference Result 31447 states and 176857 transitions. [2021-06-24 17:53:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 17:53:38,864 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 17:53:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:39,336 INFO L225 Difference]: With dead ends: 31447 [2021-06-24 17:53:39,336 INFO L226 Difference]: Without dead ends: 31447 [2021-06-24 17:53:39,337 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:53:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31447 states. [2021-06-24 17:53:40,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31447 to 30927. [2021-06-24 17:53:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30927 states, 30911 states have (on average 5.640095758791369) internal successors, (174341), 30926 states have internal predecessors, (174341), 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 17:53:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30927 states to 30927 states and 174341 transitions. [2021-06-24 17:53:40,893 INFO L78 Accepts]: Start accepts. Automaton has 30927 states and 174341 transitions. Word has length 15 [2021-06-24 17:53:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:40,893 INFO L482 AbstractCegarLoop]: Abstraction has 30927 states and 174341 transitions. [2021-06-24 17:53:40,894 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 17:53:40,894 INFO L276 IsEmpty]: Start isEmpty. Operand 30927 states and 174341 transitions. [2021-06-24 17:53:40,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-24 17:53:40,911 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:40,911 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:40,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-24 17:53:40,912 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:40,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:40,912 INFO L82 PathProgramCache]: Analyzing trace with hash -619883617, now seen corresponding path program 2 times [2021-06-24 17:53:40,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:40,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022522886] [2021-06-24 17:53:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:40,952 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 17:53:40,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:40,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022522886] [2021-06-24 17:53:40,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022522886] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:40,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:40,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 17:53:40,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510570544] [2021-06-24 17:53:40,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:53:40,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:40,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:53:40,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:40,953 INFO L87 Difference]: Start difference. First operand 30927 states and 174341 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 17:53:41,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:41,159 INFO L93 Difference]: Finished difference Result 29351 states and 138724 transitions. [2021-06-24 17:53:41,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:53:41,160 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 17:53:41,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:41,232 INFO L225 Difference]: With dead ends: 29351 [2021-06-24 17:53:41,232 INFO L226 Difference]: Without dead ends: 16340 [2021-06-24 17:53:41,232 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16340 states. [2021-06-24 17:53:41,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16340 to 14848. [2021-06-24 17:53:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14848 states, 14832 states have (on average 4.729706040992449) internal successors, (70151), 14847 states have internal predecessors, (70151), 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 17:53:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14848 states to 14848 states and 70151 transitions. [2021-06-24 17:53:41,965 INFO L78 Accepts]: Start accepts. Automaton has 14848 states and 70151 transitions. Word has length 15 [2021-06-24 17:53:41,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:41,965 INFO L482 AbstractCegarLoop]: Abstraction has 14848 states and 70151 transitions. [2021-06-24 17:53:41,965 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 17:53:41,965 INFO L276 IsEmpty]: Start isEmpty. Operand 14848 states and 70151 transitions. [2021-06-24 17:53:41,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-24 17:53:41,975 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:41,976 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 17:53:41,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-24 17:53:41,976 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:41,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:41,976 INFO L82 PathProgramCache]: Analyzing trace with hash 686006939, now seen corresponding path program 1 times [2021-06-24 17:53:41,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:41,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400638910] [2021-06-24 17:53:41,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:42,031 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 17:53:42,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:42,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400638910] [2021-06-24 17:53:42,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400638910] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:42,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:42,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 17:53:42,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061116592] [2021-06-24 17:53:42,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 17:53:42,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:42,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 17:53:42,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:53:42,033 INFO L87 Difference]: Start difference. First operand 14848 states and 70151 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 17:53:42,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:42,374 INFO L93 Difference]: Finished difference Result 21856 states and 105995 transitions. [2021-06-24 17:53:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 17:53:42,374 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 17:53:42,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:42,462 INFO L225 Difference]: With dead ends: 21856 [2021-06-24 17:53:42,462 INFO L226 Difference]: Without dead ends: 20976 [2021-06-24 17:53:42,462 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:53:42,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20976 states. [2021-06-24 17:53:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20976 to 16596. [2021-06-24 17:53:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16596 states, 16580 states have (on average 4.765741857659831) internal successors, (79016), 16595 states have internal predecessors, (79016), 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 17:53:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16596 states to 16596 states and 79016 transitions. [2021-06-24 17:53:43,287 INFO L78 Accepts]: Start accepts. Automaton has 16596 states and 79016 transitions. Word has length 18 [2021-06-24 17:53:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:43,288 INFO L482 AbstractCegarLoop]: Abstraction has 16596 states and 79016 transitions. [2021-06-24 17:53:43,288 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 17:53:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 16596 states and 79016 transitions. [2021-06-24 17:53:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-24 17:53:43,324 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:43,325 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 17:53:43,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-24 17:53:43,332 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:43,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1309995287, now seen corresponding path program 1 times [2021-06-24 17:53:43,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:43,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955077426] [2021-06-24 17:53:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:43,444 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 17:53:43,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:43,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955077426] [2021-06-24 17:53:43,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955077426] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:43,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:43,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 17:53:43,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120391470] [2021-06-24 17:53:43,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 17:53:43,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:43,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 17:53:43,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:53:43,446 INFO L87 Difference]: Start difference. First operand 16596 states and 79016 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 17:53:43,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:43,735 INFO L93 Difference]: Finished difference Result 23588 states and 114604 transitions. [2021-06-24 17:53:43,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 17:53:43,735 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 17:53:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:43,817 INFO L225 Difference]: With dead ends: 23588 [2021-06-24 17:53:43,817 INFO L226 Difference]: Without dead ends: 20921 [2021-06-24 17:53:43,817 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:53:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20921 states. [2021-06-24 17:53:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20921 to 16099. [2021-06-24 17:53:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16099 states, 16083 states have (on average 4.7381707392899335) internal successors, (76204), 16098 states have internal predecessors, (76204), 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 17:53:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16099 states to 16099 states and 76204 transitions. [2021-06-24 17:53:44,515 INFO L78 Accepts]: Start accepts. Automaton has 16099 states and 76204 transitions. Word has length 21 [2021-06-24 17:53:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:44,516 INFO L482 AbstractCegarLoop]: Abstraction has 16099 states and 76204 transitions. [2021-06-24 17:53:44,516 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 17:53:44,516 INFO L276 IsEmpty]: Start isEmpty. Operand 16099 states and 76204 transitions. [2021-06-24 17:53:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 17:53:44,528 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:44,529 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 17:53:44,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-24 17:53:44,529 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:44,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:44,529 INFO L82 PathProgramCache]: Analyzing trace with hash -867127466, now seen corresponding path program 1 times [2021-06-24 17:53:44,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:44,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405975819] [2021-06-24 17:53:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:44,619 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 17:53:44,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:44,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405975819] [2021-06-24 17:53:44,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405975819] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:44,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:44,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 17:53:44,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201307009] [2021-06-24 17:53:44,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 17:53:44,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:44,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 17:53:44,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:53:44,621 INFO L87 Difference]: Start difference. First operand 16099 states and 76204 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 17:53:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:44,826 INFO L93 Difference]: Finished difference Result 20355 states and 98574 transitions. [2021-06-24 17:53:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 17:53:44,829 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 17:53:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:44,880 INFO L225 Difference]: With dead ends: 20355 [2021-06-24 17:53:44,885 INFO L226 Difference]: Without dead ends: 15343 [2021-06-24 17:53:44,885 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:53:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15343 states. [2021-06-24 17:53:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15343 to 12496. [2021-06-24 17:53:45,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12496 states, 12480 states have (on average 4.660657051282051) internal successors, (58165), 12495 states have internal predecessors, (58165), 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 17:53:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12496 states to 12496 states and 58165 transitions. [2021-06-24 17:53:45,390 INFO L78 Accepts]: Start accepts. Automaton has 12496 states and 58165 transitions. Word has length 24 [2021-06-24 17:53:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:45,390 INFO L482 AbstractCegarLoop]: Abstraction has 12496 states and 58165 transitions. [2021-06-24 17:53:45,391 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 17:53:45,391 INFO L276 IsEmpty]: Start isEmpty. Operand 12496 states and 58165 transitions. [2021-06-24 17:53:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-24 17:53:45,398 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:45,399 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, 1, 1, 1, 1] [2021-06-24 17:53:45,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-24 17:53:45,399 INFO L430 AbstractCegarLoop]: === Iteration 7 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:45,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:45,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1178843284, now seen corresponding path program 1 times [2021-06-24 17:53:45,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:45,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850782180] [2021-06-24 17:53:45,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:45,481 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 17:53:45,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:45,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850782180] [2021-06-24 17:53:45,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850782180] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:45,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:45,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-24 17:53:45,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678923886] [2021-06-24 17:53:45,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-24 17:53:45,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:45,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-24 17:53:45,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 17:53:45,483 INFO L87 Difference]: Start difference. First operand 12496 states and 58165 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 17:53:45,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:45,758 INFO L93 Difference]: Finished difference Result 5568 states and 28609 transitions. [2021-06-24 17:53:45,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-24 17:53:45,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 28 [2021-06-24 17:53:45,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:45,759 INFO L225 Difference]: With dead ends: 5568 [2021-06-24 17:53:45,759 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 17:53:45,761 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 17:53:45,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 17:53:45,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 17:53:45,761 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 17:53:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 17:53:45,762 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-24 17:53:45,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:45,762 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 17:53:45,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 17:53:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 17:53:45,762 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 17:53:45,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-24 17:53:45,762 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork4 was SAFE (2/6) [2021-06-24 17:53:45,762 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 17:53:45,763 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 17:53:45,763 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 17:53:45,763 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 17:53:45,763 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 17:53:45,763 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 17:53:45,763 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 17:53:45,763 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 17:53:45,763 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork5======== [2021-06-24 17:53:45,764 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 47 transitions, 124 flow [2021-06-24 17:53:52,906 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 42191 states, 34675 states have (on average 6.234347512617159) internal successors, (216176), 34690 states have internal predecessors, (216176), 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 17:53:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 42191 states, 34675 states have (on average 6.234347512617159) internal successors, (216176), 34690 states have internal predecessors, (216176), 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 17:53:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 17:53:52,957 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:52,957 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:52,957 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:52,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:52,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1467067444, now seen corresponding path program 1 times [2021-06-24 17:53:52,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:52,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831633075] [2021-06-24 17:53:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:52,969 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 17:53:52,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:52,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831633075] [2021-06-24 17:53:52,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831633075] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:52,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:52,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 17:53:52,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252070401] [2021-06-24 17:53:52,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:53:52,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:52,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:53:52,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:53,020 INFO L87 Difference]: Start difference. First operand has 42191 states, 34675 states have (on average 6.234347512617159) internal successors, (216176), 34690 states have internal predecessors, (216176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 17:53:53,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:53,274 INFO L93 Difference]: Finished difference Result 30623 states and 172392 transitions. [2021-06-24 17:53:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:53:53,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-24 17:53:53,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:53,359 INFO L225 Difference]: With dead ends: 30623 [2021-06-24 17:53:53,359 INFO L226 Difference]: Without dead ends: 21571 [2021-06-24 17:53:53,359 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21571 states. [2021-06-24 17:53:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21571 to 21511. [2021-06-24 17:53:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21511 states, 21495 states have (on average 5.4265643172830895) internal successors, (116644), 21510 states have internal predecessors, (116644), 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 17:53:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21511 states to 21511 states and 116644 transitions. [2021-06-24 17:53:54,370 INFO L78 Accepts]: Start accepts. Automaton has 21511 states and 116644 transitions. Word has length 12 [2021-06-24 17:53:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:54,370 INFO L482 AbstractCegarLoop]: Abstraction has 21511 states and 116644 transitions. [2021-06-24 17:53:54,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 17:53:54,371 INFO L276 IsEmpty]: Start isEmpty. Operand 21511 states and 116644 transitions. [2021-06-24 17:53:54,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 17:53:54,383 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:54,383 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:54,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-24 17:53:54,383 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:54,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:54,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2036484302, now seen corresponding path program 1 times [2021-06-24 17:53:54,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:54,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704440194] [2021-06-24 17:53:54,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:54,392 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 17:53:54,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:54,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704440194] [2021-06-24 17:53:54,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704440194] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:54,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:54,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 17:53:54,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001783980] [2021-06-24 17:53:54,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:53:54,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:54,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:53:54,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:54,394 INFO L87 Difference]: Start difference. First operand 21511 states and 116644 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 17:53:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:54,707 INFO L93 Difference]: Finished difference Result 21451 states and 95701 transitions. [2021-06-24 17:53:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:53:54,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 17:53:54,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:54,760 INFO L225 Difference]: With dead ends: 21451 [2021-06-24 17:53:54,760 INFO L226 Difference]: Without dead ends: 10794 [2021-06-24 17:53:54,761 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:53:54,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10794 states. [2021-06-24 17:53:55,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10794 to 9834. [2021-06-24 17:53:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9818 states have (on average 4.502953758402933) internal successors, (44210), 9833 states have internal predecessors, (44210), 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 17:53:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 44210 transitions. [2021-06-24 17:53:55,201 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 44210 transitions. Word has length 16 [2021-06-24 17:53:55,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:55,201 INFO L482 AbstractCegarLoop]: Abstraction has 9834 states and 44210 transitions. [2021-06-24 17:53:55,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 17:53:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 44210 transitions. [2021-06-24 17:53:55,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 17:53:55,206 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:55,206 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:55,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-24 17:53:55,207 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:55,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:55,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1295829710, now seen corresponding path program 2 times [2021-06-24 17:53:55,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:55,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436763726] [2021-06-24 17:53:55,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:55,238 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 17:53:55,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:55,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436763726] [2021-06-24 17:53:55,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436763726] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:55,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:55,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 17:53:55,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859287617] [2021-06-24 17:53:55,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 17:53:55,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:55,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 17:53:55,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:53:55,240 INFO L87 Difference]: Start difference. First operand 9834 states and 44210 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 17:53:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:55,355 INFO L93 Difference]: Finished difference Result 14930 states and 70714 transitions. [2021-06-24 17:53:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 17:53:55,356 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-24 17:53:55,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:55,401 INFO L225 Difference]: With dead ends: 14930 [2021-06-24 17:53:55,401 INFO L226 Difference]: Without dead ends: 14859 [2021-06-24 17:53:55,401 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:53:55,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14859 states. [2021-06-24 17:53:55,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14859 to 14119. [2021-06-24 17:53:55,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14119 states, 14103 states have (on average 4.764660001418138) internal successors, (67196), 14118 states have internal predecessors, (67196), 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 17:53:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14119 states to 14119 states and 67196 transitions. [2021-06-24 17:53:55,915 INFO L78 Accepts]: Start accepts. Automaton has 14119 states and 67196 transitions. Word has length 16 [2021-06-24 17:53:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:55,915 INFO L482 AbstractCegarLoop]: Abstraction has 14119 states and 67196 transitions. [2021-06-24 17:53:55,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 17:53:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 14119 states and 67196 transitions. [2021-06-24 17:53:55,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-24 17:53:55,927 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:55,928 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:53:55,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-24 17:53:55,928 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:55,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:55,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1958346386, now seen corresponding path program 1 times [2021-06-24 17:53:55,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:55,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371905443] [2021-06-24 17:53:55,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:55,974 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 17:53:55,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:55,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371905443] [2021-06-24 17:53:55,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371905443] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:55,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:55,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 17:53:55,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58324978] [2021-06-24 17:53:55,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 17:53:55,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:55,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 17:53:55,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:53:55,976 INFO L87 Difference]: Start difference. First operand 14119 states and 67196 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 17:53:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:56,160 INFO L93 Difference]: Finished difference Result 21015 states and 102652 transitions. [2021-06-24 17:53:56,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 17:53:56,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 19 [2021-06-24 17:53:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:56,358 INFO L225 Difference]: With dead ends: 21015 [2021-06-24 17:53:56,358 INFO L226 Difference]: Without dead ends: 20222 [2021-06-24 17:53:56,359 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:53:56,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20222 states. [2021-06-24 17:53:56,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20222 to 15834. [2021-06-24 17:53:56,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15834 states, 15818 states have (on average 4.801112656467316) internal successors, (75944), 15833 states have internal predecessors, (75944), 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 17:53:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15834 states to 15834 states and 75944 transitions. [2021-06-24 17:53:56,889 INFO L78 Accepts]: Start accepts. Automaton has 15834 states and 75944 transitions. Word has length 19 [2021-06-24 17:53:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:56,889 INFO L482 AbstractCegarLoop]: Abstraction has 15834 states and 75944 transitions. [2021-06-24 17:53:56,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 17:53:56,889 INFO L276 IsEmpty]: Start isEmpty. Operand 15834 states and 75944 transitions. [2021-06-24 17:53:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-24 17:53:56,905 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:56,905 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] [2021-06-24 17:53:56,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-24 17:53:56,906 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:56,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:56,906 INFO L82 PathProgramCache]: Analyzing trace with hash 492498792, now seen corresponding path program 1 times [2021-06-24 17:53:56,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:56,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092254875] [2021-06-24 17:53:56,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:56,959 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 17:53:56,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:56,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092254875] [2021-06-24 17:53:56,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092254875] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:56,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:56,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 17:53:56,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148587721] [2021-06-24 17:53:56,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 17:53:56,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:56,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 17:53:56,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:53:56,961 INFO L87 Difference]: Start difference. First operand 15834 states and 75944 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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 17:53:57,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:57,143 INFO L93 Difference]: Finished difference Result 22714 states and 111144 transitions. [2021-06-24 17:53:57,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 17:53:57,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-06-24 17:53:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:57,211 INFO L225 Difference]: With dead ends: 22714 [2021-06-24 17:53:57,211 INFO L226 Difference]: Without dead ends: 20161 [2021-06-24 17:53:57,212 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:53:57,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20161 states. [2021-06-24 17:53:57,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20161 to 15334. [2021-06-24 17:53:57,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15334 states, 15318 states have (on average 4.773273273273273) internal successors, (73117), 15333 states have internal predecessors, (73117), 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 17:53:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15334 states to 15334 states and 73117 transitions. [2021-06-24 17:53:57,957 INFO L78 Accepts]: Start accepts. Automaton has 15334 states and 73117 transitions. Word has length 22 [2021-06-24 17:53:57,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:57,958 INFO L482 AbstractCegarLoop]: Abstraction has 15334 states and 73117 transitions. [2021-06-24 17:53:57,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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 17:53:57,958 INFO L276 IsEmpty]: Start isEmpty. Operand 15334 states and 73117 transitions. [2021-06-24 17:53:57,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-24 17:53:57,974 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:57,974 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, 1] [2021-06-24 17:53:57,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-24 17:53:57,975 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash 896729805, now seen corresponding path program 1 times [2021-06-24 17:53:57,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:57,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584294212] [2021-06-24 17:53:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:58,032 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 17:53:58,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:58,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584294212] [2021-06-24 17:53:58,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584294212] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:58,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:58,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 17:53:58,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288528659] [2021-06-24 17:53:58,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 17:53:58,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:58,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 17:53:58,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:53:58,034 INFO L87 Difference]: Start difference. First operand 15334 states and 73117 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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 17:53:58,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:58,280 INFO L93 Difference]: Finished difference Result 20262 states and 98269 transitions. [2021-06-24 17:53:58,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 17:53:58,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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 25 [2021-06-24 17:53:58,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:58,334 INFO L225 Difference]: With dead ends: 20262 [2021-06-24 17:53:58,334 INFO L226 Difference]: Without dead ends: 15343 [2021-06-24 17:53:58,335 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:53:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15343 states. [2021-06-24 17:53:58,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15343 to 12496. [2021-06-24 17:53:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12496 states, 12480 states have (on average 4.660657051282051) internal successors, (58165), 12495 states have internal predecessors, (58165), 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 17:53:58,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12496 states to 12496 states and 58165 transitions. [2021-06-24 17:53:58,910 INFO L78 Accepts]: Start accepts. Automaton has 12496 states and 58165 transitions. Word has length 25 [2021-06-24 17:53:58,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:58,910 INFO L482 AbstractCegarLoop]: Abstraction has 12496 states and 58165 transitions. [2021-06-24 17:53:58,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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 17:53:58,910 INFO L276 IsEmpty]: Start isEmpty. Operand 12496 states and 58165 transitions. [2021-06-24 17:53:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-24 17:53:58,918 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:53:58,918 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, 1, 1, 1, 1] [2021-06-24 17:53:58,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-24 17:53:58,918 INFO L430 AbstractCegarLoop]: === Iteration 7 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:53:58,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:53:58,919 INFO L82 PathProgramCache]: Analyzing trace with hash 416146869, now seen corresponding path program 1 times [2021-06-24 17:53:58,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:53:58,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388110071] [2021-06-24 17:53:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:53:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:53:58,979 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 17:53:58,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:53:58,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388110071] [2021-06-24 17:53:58,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388110071] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:53:58,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:53:58,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-24 17:53:58,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578284478] [2021-06-24 17:53:58,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-24 17:53:58,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:53:58,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-24 17:53:58,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 17:53:58,981 INFO L87 Difference]: Start difference. First operand 12496 states and 58165 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 17:53:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:53:59,205 INFO L93 Difference]: Finished difference Result 5568 states and 28609 transitions. [2021-06-24 17:53:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-24 17:53:59,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 28 [2021-06-24 17:53:59,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:53:59,206 INFO L225 Difference]: With dead ends: 5568 [2021-06-24 17:53:59,206 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 17:53:59,206 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 17:53:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 17:53:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 17:53:59,206 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 17:53:59,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 17:53:59,206 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-24 17:53:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:53:59,207 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 17:53:59,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 17:53:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 17:53:59,207 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 17:53:59,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-24 17:53:59,207 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork5 was SAFE (3/6) [2021-06-24 17:53:59,208 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 17:53:59,208 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 17:53:59,208 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 17:53:59,208 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 17:53:59,208 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 17:53:59,208 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 17:53:59,208 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 17:53:59,208 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 17:53:59,208 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork2======== [2021-06-24 17:53:59,209 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 47 transitions, 124 flow [2021-06-24 17:54:05,993 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 42191 states, 33745 states have (on average 6.25162246258705) internal successors, (210961), 33760 states have internal predecessors, (210961), 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 17:54:06,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 42191 states, 33745 states have (on average 6.25162246258705) internal successors, (210961), 33760 states have internal predecessors, (210961), 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 17:54:06,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-24 17:54:06,042 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:06,042 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:54:06,042 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:06,043 INFO L82 PathProgramCache]: Analyzing trace with hash -930424517, now seen corresponding path program 1 times [2021-06-24 17:54:06,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:06,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12335296] [2021-06-24 17:54:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:06,057 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 17:54:06,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:06,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12335296] [2021-06-24 17:54:06,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12335296] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:06,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:06,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 17:54:06,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846053743] [2021-06-24 17:54:06,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:54:06,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:06,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:54:06,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:54:06,107 INFO L87 Difference]: Start difference. First operand has 42191 states, 33745 states have (on average 6.25162246258705) internal successors, (210961), 33760 states have internal predecessors, (210961), 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 17:54:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:06,487 INFO L93 Difference]: Finished difference Result 29667 states and 167374 transitions. [2021-06-24 17:54:06,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:54:06,488 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 17:54:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:06,580 INFO L225 Difference]: With dead ends: 29667 [2021-06-24 17:54:06,580 INFO L226 Difference]: Without dead ends: 21229 [2021-06-24 17:54:06,580 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:54:07,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21229 states. [2021-06-24 17:54:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21229 to 21169. [2021-06-24 17:54:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21169 states, 21153 states have (on average 5.4165839360847166) internal successors, (114577), 21168 states have internal predecessors, (114577), 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 17:54:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21169 states to 21169 states and 114577 transitions. [2021-06-24 17:54:07,504 INFO L78 Accepts]: Start accepts. Automaton has 21169 states and 114577 transitions. Word has length 9 [2021-06-24 17:54:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:07,504 INFO L482 AbstractCegarLoop]: Abstraction has 21169 states and 114577 transitions. [2021-06-24 17:54:07,504 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 17:54:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 21169 states and 114577 transitions. [2021-06-24 17:54:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-24 17:54:07,506 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:07,506 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:54:07,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-24 17:54:07,506 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:07,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:07,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1771704633, now seen corresponding path program 1 times [2021-06-24 17:54:07,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:07,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50446449] [2021-06-24 17:54:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:07,536 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 17:54:07,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:07,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50446449] [2021-06-24 17:54:07,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50446449] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:07,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:07,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 17:54:07,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855253170] [2021-06-24 17:54:07,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 17:54:07,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:07,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 17:54:07,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:54:07,537 INFO L87 Difference]: Start difference. First operand 21169 states and 114577 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 17:54:07,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:07,795 INFO L93 Difference]: Finished difference Result 31277 states and 176031 transitions. [2021-06-24 17:54:07,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 17:54:07,795 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 17:54:07,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:08,112 INFO L225 Difference]: With dead ends: 31277 [2021-06-24 17:54:08,112 INFO L226 Difference]: Without dead ends: 31277 [2021-06-24 17:54:08,113 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:54:08,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31277 states. [2021-06-24 17:54:09,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31277 to 30757. [2021-06-24 17:54:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30757 states, 30741 states have (on average 5.644416251911128) internal successors, (173515), 30756 states have internal predecessors, (173515), 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 17:54:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30757 states to 30757 states and 173515 transitions. [2021-06-24 17:54:09,289 INFO L78 Accepts]: Start accepts. Automaton has 30757 states and 173515 transitions. Word has length 13 [2021-06-24 17:54:09,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:09,289 INFO L482 AbstractCegarLoop]: Abstraction has 30757 states and 173515 transitions. [2021-06-24 17:54:09,289 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 17:54:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 30757 states and 173515 transitions. [2021-06-24 17:54:09,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-24 17:54:09,292 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:09,292 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:54:09,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-24 17:54:09,292 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:09,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2121516613, now seen corresponding path program 2 times [2021-06-24 17:54:09,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:09,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913774345] [2021-06-24 17:54:09,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:09,300 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 17:54:09,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:09,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913774345] [2021-06-24 17:54:09,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913774345] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:09,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:09,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 17:54:09,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907634738] [2021-06-24 17:54:09,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:54:09,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:09,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:54:09,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:54:09,302 INFO L87 Difference]: Start difference. First operand 30757 states and 173515 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 17:54:09,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:09,475 INFO L93 Difference]: Finished difference Result 29177 states and 137936 transitions. [2021-06-24 17:54:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:54:09,475 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 17:54:09,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:09,755 INFO L225 Difference]: With dead ends: 29177 [2021-06-24 17:54:09,755 INFO L226 Difference]: Without dead ends: 16556 [2021-06-24 17:54:09,756 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:54:09,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16556 states. [2021-06-24 17:54:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16556 to 15014. [2021-06-24 17:54:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15014 states, 14998 states have (on average 4.714761968262435) internal successors, (70712), 15013 states have internal predecessors, (70712), 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 17:54:10,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15014 states to 15014 states and 70712 transitions. [2021-06-24 17:54:10,313 INFO L78 Accepts]: Start accepts. Automaton has 15014 states and 70712 transitions. Word has length 13 [2021-06-24 17:54:10,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:10,313 INFO L482 AbstractCegarLoop]: Abstraction has 15014 states and 70712 transitions. [2021-06-24 17:54:10,313 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 17:54:10,313 INFO L276 IsEmpty]: Start isEmpty. Operand 15014 states and 70712 transitions. [2021-06-24 17:54:10,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 17:54:10,319 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:10,319 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:54:10,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-24 17:54:10,319 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:10,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:10,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1132341237, now seen corresponding path program 1 times [2021-06-24 17:54:10,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:10,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082472141] [2021-06-24 17:54:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:10,354 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 17:54:10,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:10,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082472141] [2021-06-24 17:54:10,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082472141] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:10,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:10,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 17:54:10,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398394137] [2021-06-24 17:54:10,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 17:54:10,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:10,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 17:54:10,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:54:10,355 INFO L87 Difference]: Start difference. First operand 15014 states and 70712 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 17:54:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:10,537 INFO L93 Difference]: Finished difference Result 22022 states and 106559 transitions. [2021-06-24 17:54:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 17:54:10,538 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 17:54:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:10,600 INFO L225 Difference]: With dead ends: 22022 [2021-06-24 17:54:10,600 INFO L226 Difference]: Without dead ends: 21092 [2021-06-24 17:54:10,600 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:54:10,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21092 states. [2021-06-24 17:54:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21092 to 16733. [2021-06-24 17:54:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16733 states, 16717 states have (on average 4.754800502482503) internal successors, (79486), 16732 states have internal predecessors, (79486), 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 17:54:11,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16733 states to 16733 states and 79486 transitions. [2021-06-24 17:54:11,394 INFO L78 Accepts]: Start accepts. Automaton has 16733 states and 79486 transitions. Word has length 16 [2021-06-24 17:54:11,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:11,394 INFO L482 AbstractCegarLoop]: Abstraction has 16733 states and 79486 transitions. [2021-06-24 17:54:11,394 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 17:54:11,395 INFO L276 IsEmpty]: Start isEmpty. Operand 16733 states and 79486 transitions. [2021-06-24 17:54:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 17:54:11,407 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:11,407 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 17:54:11,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-24 17:54:11,407 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:11,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:11,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1008194303, now seen corresponding path program 1 times [2021-06-24 17:54:11,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:11,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611039319] [2021-06-24 17:54:11,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:11,463 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 17:54:11,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:11,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611039319] [2021-06-24 17:54:11,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611039319] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:11,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:11,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 17:54:11,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063742416] [2021-06-24 17:54:11,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 17:54:11,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:11,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 17:54:11,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:54:11,464 INFO L87 Difference]: Start difference. First operand 16733 states and 79486 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 17:54:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:11,660 INFO L93 Difference]: Finished difference Result 23597 states and 114624 transitions. [2021-06-24 17:54:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 17:54:11,661 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 17:54:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:11,723 INFO L225 Difference]: With dead ends: 23597 [2021-06-24 17:54:11,723 INFO L226 Difference]: Without dead ends: 20892 [2021-06-24 17:54:11,724 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:54:11,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20892 states. [2021-06-24 17:54:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20892 to 16087. [2021-06-24 17:54:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16087 states, 16071 states have (on average 4.738908593118039) internal successors, (76159), 16086 states have internal predecessors, (76159), 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 17:54:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16087 states to 16087 states and 76159 transitions. [2021-06-24 17:54:12,369 INFO L78 Accepts]: Start accepts. Automaton has 16087 states and 76159 transitions. Word has length 20 [2021-06-24 17:54:12,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:12,369 INFO L482 AbstractCegarLoop]: Abstraction has 16087 states and 76159 transitions. [2021-06-24 17:54:12,369 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 17:54:12,369 INFO L276 IsEmpty]: Start isEmpty. Operand 16087 states and 76159 transitions. [2021-06-24 17:54:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 17:54:12,381 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:12,381 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 17:54:12,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-24 17:54:12,381 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:12,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:12,382 INFO L82 PathProgramCache]: Analyzing trace with hash 2045717880, now seen corresponding path program 1 times [2021-06-24 17:54:12,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:12,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303375390] [2021-06-24 17:54:12,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:12,439 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 17:54:12,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:12,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303375390] [2021-06-24 17:54:12,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303375390] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:12,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:12,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 17:54:12,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461416892] [2021-06-24 17:54:12,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 17:54:12,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:12,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 17:54:12,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:54:12,442 INFO L87 Difference]: Start difference. First operand 16087 states and 76159 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 17:54:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:12,747 INFO L93 Difference]: Finished difference Result 20343 states and 98529 transitions. [2021-06-24 17:54:12,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 17:54:12,748 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 17:54:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:12,794 INFO L225 Difference]: With dead ends: 20343 [2021-06-24 17:54:12,794 INFO L226 Difference]: Without dead ends: 15343 [2021-06-24 17:54:12,794 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:54:12,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15343 states. [2021-06-24 17:54:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15343 to 12496. [2021-06-24 17:54:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12496 states, 12480 states have (on average 4.660657051282051) internal successors, (58165), 12495 states have internal predecessors, (58165), 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 17:54:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12496 states to 12496 states and 58165 transitions. [2021-06-24 17:54:13,242 INFO L78 Accepts]: Start accepts. Automaton has 12496 states and 58165 transitions. Word has length 24 [2021-06-24 17:54:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:13,242 INFO L482 AbstractCegarLoop]: Abstraction has 12496 states and 58165 transitions. [2021-06-24 17:54:13,242 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 17:54:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 12496 states and 58165 transitions. [2021-06-24 17:54:13,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-24 17:54:13,249 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:13,249 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, 1, 1, 1, 1] [2021-06-24 17:54:13,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-24 17:54:13,249 INFO L430 AbstractCegarLoop]: === Iteration 7 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:13,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:13,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2028974616, now seen corresponding path program 1 times [2021-06-24 17:54:13,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:13,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671008021] [2021-06-24 17:54:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:13,312 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 17:54:13,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:13,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671008021] [2021-06-24 17:54:13,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671008021] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:13,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:13,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-24 17:54:13,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294485467] [2021-06-24 17:54:13,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-24 17:54:13,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:13,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-24 17:54:13,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 17:54:13,313 INFO L87 Difference]: Start difference. First operand 12496 states and 58165 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 17:54:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:13,449 INFO L93 Difference]: Finished difference Result 5568 states and 28609 transitions. [2021-06-24 17:54:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-24 17:54:13,450 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 28 [2021-06-24 17:54:13,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:13,450 INFO L225 Difference]: With dead ends: 5568 [2021-06-24 17:54:13,450 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 17:54:13,450 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 17:54:13,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 17:54:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 17:54:13,450 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 17:54:13,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 17:54:13,451 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-24 17:54:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:13,451 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 17:54:13,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 17:54:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 17:54:13,451 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 17:54:13,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-24 17:54:13,451 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork2 was SAFE (4/6) [2021-06-24 17:54:13,451 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 17:54:13,451 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 17:54:13,452 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 17:54:13,452 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 17:54:13,452 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 17:54:13,452 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 17:54:13,452 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 17:54:13,452 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 17:54:13,452 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork3======== [2021-06-24 17:54:13,452 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 47 transitions, 124 flow [2021-06-24 17:54:20,189 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 42191 states, 33775 states have (on average 6.249474463360474) internal successors, (211076), 33790 states have internal predecessors, (211076), 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 17:54:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 42191 states, 33775 states have (on average 6.249474463360474) internal successors, (211076), 33790 states have internal predecessors, (211076), 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 17:54:20,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-24 17:54:20,243 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:20,243 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:54:20,243 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:20,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:20,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1221636242, now seen corresponding path program 1 times [2021-06-24 17:54:20,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:20,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366414108] [2021-06-24 17:54:20,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:20,254 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 17:54:20,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:20,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366414108] [2021-06-24 17:54:20,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366414108] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:20,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:20,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 17:54:20,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007482134] [2021-06-24 17:54:20,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:54:20,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:20,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:54:20,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:54:20,308 INFO L87 Difference]: Start difference. First operand has 42191 states, 33775 states have (on average 6.249474463360474) internal successors, (211076), 33790 states have internal predecessors, (211076), 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 17:54:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:20,531 INFO L93 Difference]: Finished difference Result 29703 states and 167506 transitions. [2021-06-24 17:54:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:54:20,532 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 17:54:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:20,614 INFO L225 Difference]: With dead ends: 29703 [2021-06-24 17:54:20,614 INFO L226 Difference]: Without dead ends: 21247 [2021-06-24 17:54:20,614 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:54:21,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21247 states. [2021-06-24 17:54:21,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21247 to 21187. [2021-06-24 17:54:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21187 states, 21171 states have (on average 5.4155212318737895) internal successors, (114652), 21186 states have internal predecessors, (114652), 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 17:54:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21187 states to 21187 states and 114652 transitions. [2021-06-24 17:54:21,585 INFO L78 Accepts]: Start accepts. Automaton has 21187 states and 114652 transitions. Word has length 10 [2021-06-24 17:54:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:21,585 INFO L482 AbstractCegarLoop]: Abstraction has 21187 states and 114652 transitions. [2021-06-24 17:54:21,586 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 17:54:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand 21187 states and 114652 transitions. [2021-06-24 17:54:21,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-24 17:54:21,589 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:21,590 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:54:21,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-24 17:54:21,590 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:21,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:21,590 INFO L82 PathProgramCache]: Analyzing trace with hash 429911952, now seen corresponding path program 1 times [2021-06-24 17:54:21,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:21,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686219718] [2021-06-24 17:54:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:21,623 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 17:54:21,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:21,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686219718] [2021-06-24 17:54:21,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686219718] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:21,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:21,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 17:54:21,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872218202] [2021-06-24 17:54:21,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 17:54:21,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:21,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 17:54:21,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:54:21,625 INFO L87 Difference]: Start difference. First operand 21187 states and 114652 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 17:54:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:22,023 INFO L93 Difference]: Finished difference Result 31309 states and 176160 transitions. [2021-06-24 17:54:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 17:54:22,024 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 17:54:22,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:22,156 INFO L225 Difference]: With dead ends: 31309 [2021-06-24 17:54:22,156 INFO L226 Difference]: Without dead ends: 31309 [2021-06-24 17:54:22,156 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:54:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31309 states. [2021-06-24 17:54:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31309 to 30789. [2021-06-24 17:54:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30789 states, 30773 states have (on average 5.642738764501349) internal successors, (173644), 30788 states have internal predecessors, (173644), 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 17:54:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30789 states to 30789 states and 173644 transitions. [2021-06-24 17:54:23,734 INFO L78 Accepts]: Start accepts. Automaton has 30789 states and 173644 transitions. Word has length 14 [2021-06-24 17:54:23,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:23,734 INFO L482 AbstractCegarLoop]: Abstraction has 30789 states and 173644 transitions. [2021-06-24 17:54:23,734 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 17:54:23,734 INFO L276 IsEmpty]: Start isEmpty. Operand 30789 states and 173644 transitions. [2021-06-24 17:54:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-24 17:54:23,740 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:23,740 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:54:23,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-24 17:54:23,740 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:23,741 INFO L82 PathProgramCache]: Analyzing trace with hash 688528212, now seen corresponding path program 2 times [2021-06-24 17:54:23,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:23,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804025738] [2021-06-24 17:54:23,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 17:54:23,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:23,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804025738] [2021-06-24 17:54:23,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804025738] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:23,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:23,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 17:54:23,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821686972] [2021-06-24 17:54:23,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:54:23,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:23,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:54:23,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:54:23,791 INFO L87 Difference]: Start difference. First operand 30789 states and 173644 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 17:54:23,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:23,989 INFO L93 Difference]: Finished difference Result 29211 states and 138066 transitions. [2021-06-24 17:54:23,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:54:23,990 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 17:54:23,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:24,041 INFO L225 Difference]: With dead ends: 29211 [2021-06-24 17:54:24,041 INFO L226 Difference]: Without dead ends: 16522 [2021-06-24 17:54:24,042 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:54:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16522 states. [2021-06-24 17:54:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16522 to 14988. [2021-06-24 17:54:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14988 states, 14972 states have (on average 4.717940154955918) internal successors, (70637), 14987 states have internal predecessors, (70637), 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 17:54:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14988 states to 14988 states and 70637 transitions. [2021-06-24 17:54:24,634 INFO L78 Accepts]: Start accepts. Automaton has 14988 states and 70637 transitions. Word has length 14 [2021-06-24 17:54:24,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:24,634 INFO L482 AbstractCegarLoop]: Abstraction has 14988 states and 70637 transitions. [2021-06-24 17:54:24,635 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 17:54:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 14988 states and 70637 transitions. [2021-06-24 17:54:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-24 17:54:24,642 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:24,642 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 17:54:24,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-24 17:54:24,642 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:24,642 INFO L82 PathProgramCache]: Analyzing trace with hash 635465544, now seen corresponding path program 1 times [2021-06-24 17:54:24,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:24,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279818031] [2021-06-24 17:54:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:24,677 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 17:54:24,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:24,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279818031] [2021-06-24 17:54:24,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279818031] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:24,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:24,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 17:54:24,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169505992] [2021-06-24 17:54:24,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 17:54:24,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:24,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 17:54:24,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:54:24,678 INFO L87 Difference]: Start difference. First operand 14988 states and 70637 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 17:54:24,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:24,844 INFO L93 Difference]: Finished difference Result 22020 states and 106553 transitions. [2021-06-24 17:54:24,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 17:54:24,845 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 17:54:24,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:25,055 INFO L225 Difference]: With dead ends: 22020 [2021-06-24 17:54:25,055 INFO L226 Difference]: Without dead ends: 21102 [2021-06-24 17:54:25,056 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:54:25,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21102 states. [2021-06-24 17:54:25,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21102 to 16737. [2021-06-24 17:54:25,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16737 states, 16721 states have (on average 4.7543807188565275) internal successors, (79498), 16736 states have internal predecessors, (79498), 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 17:54:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16737 states to 16737 states and 79498 transitions. [2021-06-24 17:54:25,662 INFO L78 Accepts]: Start accepts. Automaton has 16737 states and 79498 transitions. Word has length 17 [2021-06-24 17:54:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:25,662 INFO L482 AbstractCegarLoop]: Abstraction has 16737 states and 79498 transitions. [2021-06-24 17:54:25,662 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 17:54:25,662 INFO L276 IsEmpty]: Start isEmpty. Operand 16737 states and 79498 transitions. [2021-06-24 17:54:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 17:54:25,673 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:25,673 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 17:54:25,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-24 17:54:25,674 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:25,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:25,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1974008534, now seen corresponding path program 1 times [2021-06-24 17:54:25,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:25,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661866491] [2021-06-24 17:54:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:25,718 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 17:54:25,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:25,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661866491] [2021-06-24 17:54:25,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661866491] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:25,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:25,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 17:54:25,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492033357] [2021-06-24 17:54:25,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 17:54:25,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:25,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 17:54:25,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:54:25,719 INFO L87 Difference]: Start difference. First operand 16737 states and 79498 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 17:54:25,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:25,903 INFO L93 Difference]: Finished difference Result 23601 states and 114636 transitions. [2021-06-24 17:54:25,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 17:54:25,904 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 17:54:25,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:25,970 INFO L225 Difference]: With dead ends: 23601 [2021-06-24 17:54:25,970 INFO L226 Difference]: Without dead ends: 20895 [2021-06-24 17:54:25,970 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:54:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20895 states. [2021-06-24 17:54:26,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20895 to 16090. [2021-06-24 17:54:26,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16090 states, 16074 states have (on average 4.738584048774419) internal successors, (76168), 16089 states have internal predecessors, (76168), 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 17:54:26,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16090 states to 16090 states and 76168 transitions. [2021-06-24 17:54:26,540 INFO L78 Accepts]: Start accepts. Automaton has 16090 states and 76168 transitions. Word has length 20 [2021-06-24 17:54:26,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:26,540 INFO L482 AbstractCegarLoop]: Abstraction has 16090 states and 76168 transitions. [2021-06-24 17:54:26,540 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 17:54:26,540 INFO L276 IsEmpty]: Start isEmpty. Operand 16090 states and 76168 transitions. [2021-06-24 17:54:26,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 17:54:26,552 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:26,552 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 17:54:26,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-24 17:54:26,552 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:26,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:26,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1268391453, now seen corresponding path program 1 times [2021-06-24 17:54:26,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:26,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450225706] [2021-06-24 17:54:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:26,610 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 17:54:26,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:26,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450225706] [2021-06-24 17:54:26,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450225706] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:26,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:26,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 17:54:26,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196715218] [2021-06-24 17:54:26,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 17:54:26,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:26,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 17:54:26,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:54:26,611 INFO L87 Difference]: Start difference. First operand 16090 states and 76168 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 17:54:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:26,975 INFO L93 Difference]: Finished difference Result 20346 states and 98538 transitions. [2021-06-24 17:54:26,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 17:54:26,976 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 17:54:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:27,024 INFO L225 Difference]: With dead ends: 20346 [2021-06-24 17:54:27,024 INFO L226 Difference]: Without dead ends: 15343 [2021-06-24 17:54:27,024 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:54:27,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15343 states. [2021-06-24 17:54:27,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15343 to 12496. [2021-06-24 17:54:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12496 states, 12480 states have (on average 4.660657051282051) internal successors, (58165), 12495 states have internal predecessors, (58165), 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 17:54:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12496 states to 12496 states and 58165 transitions. [2021-06-24 17:54:27,515 INFO L78 Accepts]: Start accepts. Automaton has 12496 states and 58165 transitions. Word has length 24 [2021-06-24 17:54:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:27,515 INFO L482 AbstractCegarLoop]: Abstraction has 12496 states and 58165 transitions. [2021-06-24 17:54:27,515 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 17:54:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 12496 states and 58165 transitions. [2021-06-24 17:54:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-24 17:54:27,522 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:27,522 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, 1, 1, 1, 1] [2021-06-24 17:54:27,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-24 17:54:27,522 INFO L430 AbstractCegarLoop]: === Iteration 7 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:27,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:27,523 INFO L82 PathProgramCache]: Analyzing trace with hash 443514371, now seen corresponding path program 1 times [2021-06-24 17:54:27,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:27,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181505589] [2021-06-24 17:54:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:27,582 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 17:54:27,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:27,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181505589] [2021-06-24 17:54:27,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181505589] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:27,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:27,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-24 17:54:27,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169171987] [2021-06-24 17:54:27,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-24 17:54:27,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:27,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-24 17:54:27,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 17:54:27,584 INFO L87 Difference]: Start difference. First operand 12496 states and 58165 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 17:54:27,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:27,723 INFO L93 Difference]: Finished difference Result 5568 states and 28609 transitions. [2021-06-24 17:54:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-24 17:54:27,723 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 28 [2021-06-24 17:54:27,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:27,723 INFO L225 Difference]: With dead ends: 5568 [2021-06-24 17:54:27,723 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 17:54:27,724 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 17:54:27,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 17:54:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 17:54:27,724 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 17:54:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 17:54:27,724 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-24 17:54:27,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:27,724 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 17:54:27,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 17:54:27,724 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 17:54:27,724 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 17:54:27,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-24 17:54:27,724 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork3 was SAFE (5/6) [2021-06-24 17:54:27,724 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 17:54:27,725 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 17:54:27,725 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 17:54:27,725 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 17:54:27,725 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 17:54:27,725 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 17:54:27,725 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 17:54:27,725 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 17:54:27,725 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork1======== [2021-06-24 17:54:27,730 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 47 transitions, 124 flow [2021-06-24 17:54:34,374 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 42191 states, 33739 states have (on average 6.2522303565606565) internal successors, (210944), 33754 states have internal predecessors, (210944), 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 17:54:34,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 42191 states, 33739 states have (on average 6.2522303565606565) internal successors, (210944), 33754 states have internal predecessors, (210944), 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 17:54:34,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-24 17:54:34,424 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:34,424 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:54:34,424 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:34,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:34,424 INFO L82 PathProgramCache]: Analyzing trace with hash -307108784, now seen corresponding path program 1 times [2021-06-24 17:54:34,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:34,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612549123] [2021-06-24 17:54:34,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:34,435 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 17:54:34,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:34,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612549123] [2021-06-24 17:54:34,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612549123] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:34,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:34,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 17:54:34,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930020631] [2021-06-24 17:54:34,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:54:34,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:34,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:54:34,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:54:34,488 INFO L87 Difference]: Start difference. First operand has 42191 states, 33739 states have (on average 6.2522303565606565) internal successors, (210944), 33754 states have internal predecessors, (210944), 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 17:54:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:34,710 INFO L93 Difference]: Finished difference Result 29659 states and 167352 transitions. [2021-06-24 17:54:34,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:54:34,711 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 17:54:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:34,791 INFO L225 Difference]: With dead ends: 29659 [2021-06-24 17:54:34,791 INFO L226 Difference]: Without dead ends: 21223 [2021-06-24 17:54:34,792 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:54:35,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21223 states. [2021-06-24 17:54:35,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21223 to 21163. [2021-06-24 17:54:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21163 states, 21147 states have (on average 5.417316877098407) internal successors, (114560), 21162 states have internal predecessors, (114560), 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 17:54:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21163 states to 21163 states and 114560 transitions. [2021-06-24 17:54:35,770 INFO L78 Accepts]: Start accepts. Automaton has 21163 states and 114560 transitions. Word has length 8 [2021-06-24 17:54:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:35,770 INFO L482 AbstractCegarLoop]: Abstraction has 21163 states and 114560 transitions. [2021-06-24 17:54:35,770 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 17:54:35,770 INFO L276 IsEmpty]: Start isEmpty. Operand 21163 states and 114560 transitions. [2021-06-24 17:54:35,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 17:54:35,771 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:35,771 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:54:35,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-24 17:54:35,771 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:35,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:35,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1054777038, now seen corresponding path program 1 times [2021-06-24 17:54:35,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:35,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907728692] [2021-06-24 17:54:35,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:35,802 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 17:54:35,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:35,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907728692] [2021-06-24 17:54:35,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907728692] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:35,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:35,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 17:54:35,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883182486] [2021-06-24 17:54:35,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 17:54:35,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:35,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 17:54:35,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:54:35,803 INFO L87 Difference]: Start difference. First operand 21163 states and 114560 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 17:54:36,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:36,200 INFO L93 Difference]: Finished difference Result 31271 states and 176014 transitions. [2021-06-24 17:54:36,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 17:54:36,201 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 17:54:36,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:36,335 INFO L225 Difference]: With dead ends: 31271 [2021-06-24 17:54:36,335 INFO L226 Difference]: Without dead ends: 31271 [2021-06-24 17:54:36,336 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 17:54:36,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31271 states. [2021-06-24 17:54:37,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31271 to 30751. [2021-06-24 17:54:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30751 states, 30735 states have (on average 5.6449650235887425) internal successors, (173498), 30750 states have internal predecessors, (173498), 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 17:54:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30751 states to 30751 states and 173498 transitions. [2021-06-24 17:54:37,641 INFO L78 Accepts]: Start accepts. Automaton has 30751 states and 173498 transitions. Word has length 12 [2021-06-24 17:54:37,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:37,641 INFO L482 AbstractCegarLoop]: Abstraction has 30751 states and 173498 transitions. [2021-06-24 17:54:37,641 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 17:54:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 30751 states and 173498 transitions. [2021-06-24 17:54:37,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 17:54:37,642 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:37,642 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:54:37,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-24 17:54:37,642 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:37,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:37,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1170247698, now seen corresponding path program 2 times [2021-06-24 17:54:37,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:37,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304043435] [2021-06-24 17:54:37,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:37,651 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 17:54:37,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:37,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304043435] [2021-06-24 17:54:37,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304043435] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:37,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:37,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 17:54:37,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690125349] [2021-06-24 17:54:37,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 17:54:37,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:37,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 17:54:37,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:54:37,652 INFO L87 Difference]: Start difference. First operand 30751 states and 173498 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 17:54:38,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:38,073 INFO L93 Difference]: Finished difference Result 29171 states and 137919 transitions. [2021-06-24 17:54:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 17:54:38,074 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 17:54:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:38,126 INFO L225 Difference]: With dead ends: 29171 [2021-06-24 17:54:38,126 INFO L226 Difference]: Without dead ends: 16555 [2021-06-24 17:54:38,126 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 17:54:38,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16555 states. [2021-06-24 17:54:38,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16555 to 15013. [2021-06-24 17:54:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15013 states, 14997 states have (on average 4.71494298859772) internal successors, (70710), 15012 states have internal predecessors, (70710), 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 17:54:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15013 states to 15013 states and 70710 transitions. [2021-06-24 17:54:38,747 INFO L78 Accepts]: Start accepts. Automaton has 15013 states and 70710 transitions. Word has length 12 [2021-06-24 17:54:38,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:38,747 INFO L482 AbstractCegarLoop]: Abstraction has 15013 states and 70710 transitions. [2021-06-24 17:54:38,747 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 17:54:38,747 INFO L276 IsEmpty]: Start isEmpty. Operand 15013 states and 70710 transitions. [2021-06-24 17:54:38,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 17:54:38,751 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:38,751 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 17:54:38,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-24 17:54:38,752 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:38,752 INFO L82 PathProgramCache]: Analyzing trace with hash 43746405, now seen corresponding path program 1 times [2021-06-24 17:54:38,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:38,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211572873] [2021-06-24 17:54:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:38,780 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 17:54:38,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:38,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211572873] [2021-06-24 17:54:38,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211572873] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:38,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:38,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 17:54:38,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368538570] [2021-06-24 17:54:38,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 17:54:38,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:38,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 17:54:38,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:54:38,781 INFO L87 Difference]: Start difference. First operand 15013 states and 70710 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 17:54:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:38,961 INFO L93 Difference]: Finished difference Result 22021 states and 106557 transitions. [2021-06-24 17:54:38,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 17:54:38,962 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 17:54:38,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:39,194 INFO L225 Difference]: With dead ends: 22021 [2021-06-24 17:54:39,195 INFO L226 Difference]: Without dead ends: 21091 [2021-06-24 17:54:39,196 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 17:54:39,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21091 states. [2021-06-24 17:54:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21091 to 16732. [2021-06-24 17:54:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16732 states, 16716 states have (on average 4.754965302703996) internal successors, (79484), 16731 states have internal predecessors, (79484), 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 17:54:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16732 states to 16732 states and 79484 transitions. [2021-06-24 17:54:39,762 INFO L78 Accepts]: Start accepts. Automaton has 16732 states and 79484 transitions. Word has length 16 [2021-06-24 17:54:39,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:39,762 INFO L482 AbstractCegarLoop]: Abstraction has 16732 states and 79484 transitions. [2021-06-24 17:54:39,762 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 17:54:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 16732 states and 79484 transitions. [2021-06-24 17:54:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 17:54:39,773 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:39,773 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 17:54:39,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-24 17:54:39,773 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:39,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2035261903, now seen corresponding path program 1 times [2021-06-24 17:54:39,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:39,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588399780] [2021-06-24 17:54:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:39,808 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 17:54:39,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:39,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588399780] [2021-06-24 17:54:39,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588399780] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:39,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:39,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 17:54:39,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139663092] [2021-06-24 17:54:39,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 17:54:39,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:39,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 17:54:39,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:54:39,809 INFO L87 Difference]: Start difference. First operand 16732 states and 79484 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 17:54:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:40,009 INFO L93 Difference]: Finished difference Result 23596 states and 114622 transitions. [2021-06-24 17:54:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 17:54:40,009 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 17:54:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:40,072 INFO L225 Difference]: With dead ends: 23596 [2021-06-24 17:54:40,072 INFO L226 Difference]: Without dead ends: 20891 [2021-06-24 17:54:40,073 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 17:54:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20891 states. [2021-06-24 17:54:40,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20891 to 16086. [2021-06-24 17:54:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16086 states, 16070 states have (on average 4.739079029247044) internal successors, (76157), 16085 states have internal predecessors, (76157), 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 17:54:40,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16086 states to 16086 states and 76157 transitions. [2021-06-24 17:54:40,695 INFO L78 Accepts]: Start accepts. Automaton has 16086 states and 76157 transitions. Word has length 20 [2021-06-24 17:54:40,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:40,695 INFO L482 AbstractCegarLoop]: Abstraction has 16086 states and 76157 transitions. [2021-06-24 17:54:40,695 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 17:54:40,695 INFO L276 IsEmpty]: Start isEmpty. Operand 16086 states and 76157 transitions. [2021-06-24 17:54:40,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 17:54:40,709 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:40,709 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 17:54:40,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-24 17:54:40,709 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:40,709 INFO L82 PathProgramCache]: Analyzing trace with hash -166726708, now seen corresponding path program 1 times [2021-06-24 17:54:40,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:40,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890735129] [2021-06-24 17:54:40,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:40,779 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 17:54:40,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:40,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890735129] [2021-06-24 17:54:40,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890735129] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:40,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:40,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 17:54:40,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782907012] [2021-06-24 17:54:40,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 17:54:40,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:40,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 17:54:40,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:54:40,780 INFO L87 Difference]: Start difference. First operand 16086 states and 76157 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 17:54:41,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:41,146 INFO L93 Difference]: Finished difference Result 20342 states and 98527 transitions. [2021-06-24 17:54:41,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 17:54:41,147 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 17:54:41,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:41,192 INFO L225 Difference]: With dead ends: 20342 [2021-06-24 17:54:41,193 INFO L226 Difference]: Without dead ends: 15343 [2021-06-24 17:54:41,193 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 17:54:41,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15343 states. [2021-06-24 17:54:41,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15343 to 12496. [2021-06-24 17:54:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12496 states, 12480 states have (on average 4.660657051282051) internal successors, (58165), 12495 states have internal predecessors, (58165), 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 17:54:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12496 states to 12496 states and 58165 transitions. [2021-06-24 17:54:41,666 INFO L78 Accepts]: Start accepts. Automaton has 12496 states and 58165 transitions. Word has length 24 [2021-06-24 17:54:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:41,666 INFO L482 AbstractCegarLoop]: Abstraction has 12496 states and 58165 transitions. [2021-06-24 17:54:41,666 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 17:54:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 12496 states and 58165 transitions. [2021-06-24 17:54:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-24 17:54:41,673 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 17:54:41,673 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, 1, 1, 1, 1] [2021-06-24 17:54:41,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-24 17:54:41,674 INFO L430 AbstractCegarLoop]: === Iteration 7 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 17:54:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 17:54:41,674 INFO L82 PathProgramCache]: Analyzing trace with hash 477952692, now seen corresponding path program 1 times [2021-06-24 17:54:41,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 17:54:41,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032225504] [2021-06-24 17:54:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 17:54:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 17:54:41,728 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 17:54:41,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 17:54:41,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032225504] [2021-06-24 17:54:41,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032225504] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 17:54:41,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 17:54:41,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-24 17:54:41,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131015346] [2021-06-24 17:54:41,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-24 17:54:41,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 17:54:41,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-24 17:54:41,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 17:54:41,730 INFO L87 Difference]: Start difference. First operand 12496 states and 58165 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 17:54:41,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 17:54:41,856 INFO L93 Difference]: Finished difference Result 5568 states and 28609 transitions. [2021-06-24 17:54:41,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-24 17:54:41,856 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 28 [2021-06-24 17:54:41,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 17:54:41,857 INFO L225 Difference]: With dead ends: 5568 [2021-06-24 17:54:41,857 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 17:54:41,857 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 17:54:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 17:54:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 17:54:41,857 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 17:54:41,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 17:54:41,857 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-24 17:54:41,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 17:54:41,857 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 17:54:41,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 17:54:41,857 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 17:54:41,857 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 17:54:41,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-24 17:54:41,858 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork1 was SAFE (6/6) [2021-06-24 17:54:41,858 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-24 17:54:41,860 INFO L202 PluginConnector]: Adding new model bluetooth05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 05:54:41 BasicIcfg [2021-06-24 17:54:41,860 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-24 17:54:41,861 INFO L168 Benchmark]: Toolchain (without parser) took 80007.07 ms. Allocated memory was 190.8 MB in the beginning and 7.8 GB in the end (delta: 7.6 GB). Free memory was 169.6 MB in the beginning and 5.3 GB in the end (delta: -5.1 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2021-06-24 17:54:41,861 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 190.8 MB. Free memory was 170.8 MB in the beginning and 170.7 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-24 17:54:41,861 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.40 ms. Allocated memory is still 190.8 MB. Free memory was 169.6 MB in the beginning and 167.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-24 17:54:41,861 INFO L168 Benchmark]: Boogie Preprocessor took 9.28 ms. Allocated memory is still 190.8 MB. Free memory was 167.8 MB in the beginning and 166.8 MB in the end (delta: 949.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-24 17:54:41,861 INFO L168 Benchmark]: RCFGBuilder took 334.66 ms. Allocated memory is still 190.8 MB. Free memory was 166.8 MB in the beginning and 154.0 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-24 17:54:41,861 INFO L168 Benchmark]: TraceAbstraction took 79614.74 ms. Allocated memory was 190.8 MB in the beginning and 7.8 GB in the end (delta: 7.6 GB). Free memory was 153.5 MB in the beginning and 5.3 GB in the end (delta: -5.1 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2021-06-24 17:54:41,861 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 0.12 ms. Allocated memory is still 190.8 MB. Free memory was 170.8 MB in the beginning and 170.7 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.40 ms. Allocated memory is still 190.8 MB. Free memory was 169.6 MB in the beginning and 167.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 9.28 ms. Allocated memory is still 190.8 MB. Free memory was 167.8 MB in the beginning and 166.8 MB in the end (delta: 949.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 334.66 ms. Allocated memory is still 190.8 MB. Free memory was 166.8 MB in the beginning and 154.0 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 79614.74 ms. Allocated memory was 190.8 MB in the beginning and 7.8 GB in the end (delta: 7.6 GB). Free memory was 153.5 MB in the beginning and 5.3 GB in the end (delta: -5.1 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: 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 9 procedures, 60 locations, 12 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6431.0ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 44.9ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6383.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42191occurred 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 9 procedures, 60 locations, 12 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16986.5ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 157.8ms, AutomataDifference: 3436.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7076.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 379 SDtfs, 515 SDslu, 645 SDs, 0 SdLazy, 550 SolverSat, 252 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 519.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 170.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42191occurred in iteration=0, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5720.3ms AutomataMinimizationTime, 7 MinimizatonAttempts, 14121 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 14.0ms SsaConstructionTime, 72.1ms SatisfiabilityAnalysisTime, 389.3ms InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 125 ConstructedInterpolants, 0 QuantifiedInterpolants, 539 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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: DeviceThreadThread1of1ForFork5 with 1 thread instances CFG has 9 procedures, 60 locations, 12 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13443.8ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 120.9ms, AutomataDifference: 2080.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7143.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 378 SDtfs, 489 SDslu, 667 SDs, 0 SdLazy, 541 SolverSat, 228 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 401.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 128.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42191occurred in iteration=0, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3814.1ms AutomataMinimizationTime, 7 MinimizatonAttempts, 13822 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.4ms SsaConstructionTime, 18.4ms SatisfiabilityAnalysisTime, 237.0ms InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 131 ConstructedInterpolants, 0 QuantifiedInterpolants, 566 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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 9 procedures, 60 locations, 12 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14242.8ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 90.3ms, AutomataDifference: 2549.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6784.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 379 SDtfs, 546 SDslu, 665 SDs, 0 SdLazy, 564 SolverSat, 269 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 289.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 123.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42191occurred in iteration=0, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4543.4ms AutomataMinimizationTime, 7 MinimizatonAttempts, 14133 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.5ms SsaConstructionTime, 12.4ms SatisfiabilityAnalysisTime, 233.6ms InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 503 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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 9 procedures, 60 locations, 12 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14272.7ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 100.3ms, AutomataDifference: 2325.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6737.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 379 SDtfs, 467 SDslu, 679 SDs, 0 SdLazy, 573 SolverSat, 228 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 265.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 143.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42191occurred in iteration=0, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4807.3ms AutomataMinimizationTime, 7 MinimizatonAttempts, 14131 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.2ms SsaConstructionTime, 12.8ms SatisfiabilityAnalysisTime, 264.8ms InterpolantComputationTime, 127 NumberOfCodeBlocks, 127 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 518 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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 9 procedures, 60 locations, 12 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14132.8ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 86.8ms, AutomataDifference: 2582.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6649.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 379 SDtfs, 394 SDslu, 633 SDs, 0 SdLazy, 537 SolverSat, 189 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 660.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 135.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42191occurred in iteration=0, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4564.7ms AutomataMinimizationTime, 7 MinimizatonAttempts, 14133 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.1ms SsaConstructionTime, 7.2ms SatisfiabilityAnalysisTime, 218.5ms InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 113 ConstructedInterpolants, 0 QuantifiedInterpolants, 494 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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...