/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth04.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d310483fe8b4879eee5de19363f50e4b839cc4ec-d310483 [2021-06-24 18:22:08,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-24 18:22:08,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-24 18:22:08,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-24 18:22:08,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-24 18:22:08,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-24 18:22:08,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-24 18:22:08,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-24 18:22:08,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-24 18:22:08,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-24 18:22:08,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-24 18:22:08,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-24 18:22:08,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-24 18:22:08,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-24 18:22:08,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-24 18:22:08,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-24 18:22:08,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-24 18:22:08,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-24 18:22:08,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-24 18:22:08,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-24 18:22:08,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-24 18:22:08,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-24 18:22:08,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-24 18:22:08,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-24 18:22:08,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-24 18:22:08,122 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-06-24 18:22:08,145 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-24 18:22:08,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-24 18:22:08,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-24 18:22:08,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-24 18:22:08,147 INFO L138 SettingsManager]: * Use SBE=true [2021-06-24 18:22:08,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-24 18:22:08,147 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-24 18:22:08,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-24 18:22:08,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-24 18:22:08,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-24 18:22:08,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-24 18:22:08,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-24 18:22:08,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-24 18:22:08,148 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-24 18:22:08,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-24 18:22:08,148 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-24 18:22:08,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-24 18:22:08,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-24 18:22:08,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-24 18:22:08,149 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-24 18:22:08,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-24 18:22:08,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 18:22:08,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-24 18:22:08,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-24 18:22:08,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-24 18:22:08,150 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-24 18:22:08,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-24 18:22:08,150 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-24 18:22:08,150 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-24 18:22:08,150 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-24 18:22:08,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-24 18:22:08,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-24 18:22:08,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-24 18:22:08,432 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-24 18:22:08,433 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-24 18:22:08,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth04.bpl [2021-06-24 18:22:08,434 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth04.bpl' [2021-06-24 18:22:08,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-24 18:22:08,455 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-24 18:22:08,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-24 18:22:08,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-24 18:22:08,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-24 18:22:08,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-24 18:22:08,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-24 18:22:08,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-24 18:22:08,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-24 18:22:08,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-24 18:22:08,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-24 18:22:08,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-24 18:22:08,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-24 18:22:08,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 18:22:08,591 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-06-24 18:22:08,591 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-06-24 18:22:08,592 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-06-24 18:22:08,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-06-24 18:22:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-06-24 18:22:08,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-06-24 18:22:08,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-24 18:22:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-24 18:22:08,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-24 18:22:08,593 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-24 18:22:08,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-24 18:22:08,790 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-06-24 18:22:08,791 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-06-24 18:22:08,793 INFO L202 PluginConnector]: Adding new model bluetooth04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:22:08 BoogieIcfgContainer [2021-06-24 18:22:08,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-24 18:22:08,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-24 18:22:08,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-24 18:22:08,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-24 18:22:08,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/2) ... [2021-06-24 18:22:08,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578cebbe and model type bluetooth04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 06:22:08, skipping insertion in model container [2021-06-24 18:22:08,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:22:08" (2/2) ... [2021-06-24 18:22:08,814 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth04.bpl [2021-06-24 18:22:08,819 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-24 18:22:08,819 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-24 18:22:08,820 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-24 18:22:08,880 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-24 18:22:08,912 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-24 18:22:08,930 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:22:08,930 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:22:08,930 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:22:08,930 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:22:08,930 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:22:08,931 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:22:08,931 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:22:08,931 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-24 18:22:08,940 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 18:22:08,969 INFO L129 PetriNetUnfolder]: 4/35 cut-off events. [2021-06-24 18:22:08,969 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:08,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 35 events. 4/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 93 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2021-06-24 18:22:08,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 18:22:08,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions, 0 flow [2021-06-24 18:22:08,975 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-06-24 18:22:08,976 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:08,976 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/5) [2021-06-24 18:22:08,978 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:22:08,985 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:22:08,985 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:22:08,985 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:22:08,985 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:22:08,986 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:22:08,986 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:22:08,986 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:22:08,986 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork4======== [2021-06-24 18:22:08,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 18:22:09,000 INFO L129 PetriNetUnfolder]: 4/35 cut-off events. [2021-06-24 18:22:09,000 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 35 events. 4/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 93 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2021-06-24 18:22:09,008 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 18:22:09,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 35 transitions, 85 flow [2021-06-24 18:22:09,025 INFO L129 PetriNetUnfolder]: 4/34 cut-off events. [2021-06-24 18:22:09,026 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,026 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:09,027 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:09,027 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:09,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:09,031 INFO L82 PathProgramCache]: Analyzing trace with hash -403325960, now seen corresponding path program 1 times [2021-06-24 18:22:09,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:09,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776208478] [2021-06-24 18:22:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:09,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,142 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,143 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,144 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:09,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:09,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776208478] [2021-06-24 18:22:09,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776208478] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:09,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:09,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:22:09,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890330344] [2021-06-24 18:22:09,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:09,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:09,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:09,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:09,191 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 40 [2021-06-24 18:22:09,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:09,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 40 [2021-06-24 18:22:09,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:09,411 INFO L129 PetriNetUnfolder]: 275/551 cut-off events. [2021-06-24 18:22:09,411 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 551 events. 275/551 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3070 event pairs, 103 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 936. Up to 259 conditions per place. [2021-06-24 18:22:09,423 INFO L132 encePairwiseOnDemand]: 30/40 looper letters, 8 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2021-06-24 18:22:09,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 121 flow [2021-06-24 18:22:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:09,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2021-06-24 18:22:09,435 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9 [2021-06-24 18:22:09,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2021-06-24 18:22:09,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2021-06-24 18:22:09,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:09,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2021-06-24 18:22:09,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,447 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,448 INFO L185 Difference]: Start difference. First operand has 47 places, 35 transitions, 85 flow. Second operand 3 states and 108 transitions. [2021-06-24 18:22:09,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 121 flow [2021-06-24 18:22:09,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 116 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-06-24 18:22:09,458 INFO L241 Difference]: Finished difference. Result has 46 places, 39 transitions, 128 flow [2021-06-24 18:22:09,459 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2021-06-24 18:22:09,460 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2021-06-24 18:22:09,460 INFO L482 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 128 flow [2021-06-24 18:22:09,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,461 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:09,461 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:09,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-24 18:22:09,461 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:09,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:09,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1085254394, now seen corresponding path program 1 times [2021-06-24 18:22:09,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:09,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700158847] [2021-06-24 18:22:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:09,511 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,512 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,512 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,516 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,516 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:09,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:09,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700158847] [2021-06-24 18:22:09,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700158847] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:09,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:09,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:22:09,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795100383] [2021-06-24 18:22:09,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:09,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:09,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:09,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:09,521 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 40 [2021-06-24 18:22:09,521 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,521 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:09,521 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 40 [2021-06-24 18:22:09,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:09,723 INFO L129 PetriNetUnfolder]: 523/1415 cut-off events. [2021-06-24 18:22:09,723 INFO L130 PetriNetUnfolder]: For 245/245 co-relation queries the response was YES. [2021-06-24 18:22:09,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2722 conditions, 1415 events. 523/1415 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 11571 event pairs, 214 based on Foata normal form. 148/1476 useless extension candidates. Maximal degree in co-relation 2708. Up to 496 conditions per place. [2021-06-24 18:22:09,742 INFO L132 encePairwiseOnDemand]: 35/40 looper letters, 5 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2021-06-24 18:22:09,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 140 flow [2021-06-24 18:22:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:09,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:09,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2021-06-24 18:22:09,750 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9333333333333333 [2021-06-24 18:22:09,755 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2021-06-24 18:22:09,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2021-06-24 18:22:09,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:09,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2021-06-24 18:22:09,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,758 INFO L185 Difference]: Start difference. First operand has 46 places, 39 transitions, 128 flow. Second operand 3 states and 112 transitions. [2021-06-24 18:22:09,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 140 flow [2021-06-24 18:22:09,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 128 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:09,775 INFO L241 Difference]: Finished difference. Result has 47 places, 39 transitions, 127 flow [2021-06-24 18:22:09,775 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2021-06-24 18:22:09,776 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2021-06-24 18:22:09,776 INFO L482 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 127 flow [2021-06-24 18:22:09,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,776 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:09,776 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:09,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-24 18:22:09,777 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:09,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:09,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1064204598, now seen corresponding path program 2 times [2021-06-24 18:22:09,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:09,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857122572] [2021-06-24 18:22:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:09,831 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,832 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:09,845 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:09,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:09,867 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,868 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:09,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:09,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:09,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857122572] [2021-06-24 18:22:09,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857122572] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:09,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:09,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:22:09,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098082309] [2021-06-24 18:22:09,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:22:09,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:09,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:22:09,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:22:09,879 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:09,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:09,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:09,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:10,216 INFO L129 PetriNetUnfolder]: 1455/2924 cut-off events. [2021-06-24 18:22:10,216 INFO L130 PetriNetUnfolder]: For 175/214 co-relation queries the response was YES. [2021-06-24 18:22:10,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5826 conditions, 2924 events. 1455/2924 cut-off events. For 175/214 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20401 event pairs, 298 based on Foata normal form. 44/2463 useless extension candidates. Maximal degree in co-relation 5811. Up to 1072 conditions per place. [2021-06-24 18:22:10,246 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 14 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2021-06-24 18:22:10,246 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 239 flow [2021-06-24 18:22:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:22:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-24 18:22:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 171 transitions. [2021-06-24 18:22:10,252 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.855 [2021-06-24 18:22:10,252 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 171 transitions. [2021-06-24 18:22:10,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 171 transitions. [2021-06-24 18:22:10,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:10,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 171 transitions. [2021-06-24 18:22:10,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,256 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,256 INFO L185 Difference]: Start difference. First operand has 47 places, 39 transitions, 127 flow. Second operand 5 states and 171 transitions. [2021-06-24 18:22:10,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 239 flow [2021-06-24 18:22:10,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:10,260 INFO L241 Difference]: Finished difference. Result has 51 places, 53 transitions, 229 flow [2021-06-24 18:22:10,260 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2021-06-24 18:22:10,261 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2021-06-24 18:22:10,261 INFO L482 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 229 flow [2021-06-24 18:22:10,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,261 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:10,261 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:10,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-24 18:22:10,261 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:10,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:10,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1293201187, now seen corresponding path program 1 times [2021-06-24 18:22:10,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:10,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626782418] [2021-06-24 18:22:10,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:10,312 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:10,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,332 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,333 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,341 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,342 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:10,347 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:10,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:10,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626782418] [2021-06-24 18:22:10,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626782418] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:10,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:10,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:22:10,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664358751] [2021-06-24 18:22:10,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:22:10,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:10,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:22:10,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:22:10,352 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:10,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:10,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:10,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:10,815 INFO L129 PetriNetUnfolder]: 2096/3958 cut-off events. [2021-06-24 18:22:10,815 INFO L130 PetriNetUnfolder]: For 1391/1851 co-relation queries the response was YES. [2021-06-24 18:22:10,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10429 conditions, 3958 events. 2096/3958 cut-off events. For 1391/1851 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 26836 event pairs, 395 based on Foata normal form. 181/3519 useless extension candidates. Maximal degree in co-relation 10411. Up to 1454 conditions per place. [2021-06-24 18:22:10,870 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 14 selfloop transitions, 47 changer transitions 6/94 dead transitions. [2021-06-24 18:22:10,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 573 flow [2021-06-24 18:22:10,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:22:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-24 18:22:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2021-06-24 18:22:10,875 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8708333333333333 [2021-06-24 18:22:10,875 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 209 transitions. [2021-06-24 18:22:10,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 209 transitions. [2021-06-24 18:22:10,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:10,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 209 transitions. [2021-06-24 18:22:10,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,879 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,879 INFO L185 Difference]: Start difference. First operand has 51 places, 53 transitions, 229 flow. Second operand 6 states and 209 transitions. [2021-06-24 18:22:10,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 573 flow [2021-06-24 18:22:10,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 571 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:10,887 INFO L241 Difference]: Finished difference. Result has 57 places, 84 transitions, 575 flow [2021-06-24 18:22:10,887 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=57, PETRI_TRANSITIONS=84} [2021-06-24 18:22:10,887 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 10 predicate places. [2021-06-24 18:22:10,887 INFO L482 AbstractCegarLoop]: Abstraction has has 57 places, 84 transitions, 575 flow [2021-06-24 18:22:10,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,888 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:10,888 INFO L255 CegarLoopForPetriNet]: 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 18:22:10,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-24 18:22:10,888 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:10,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:10,889 INFO L82 PathProgramCache]: Analyzing trace with hash 510445374, now seen corresponding path program 1 times [2021-06-24 18:22:10,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:10,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584188269] [2021-06-24 18:22:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:10,939 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,940 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:10,945 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,947 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,971 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,983 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,984 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,985 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,986 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,986 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:10,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:10,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:10,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584188269] [2021-06-24 18:22:10,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584188269] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:10,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:10,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:22:10,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147408300] [2021-06-24 18:22:10,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:22:10,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:22:10,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:22:10,996 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:10,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 84 transitions, 575 flow. Second operand has 8 states, 8 states have (on average 29.125) internal successors, (233), 8 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:10,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:10,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:11,495 INFO L129 PetriNetUnfolder]: 2393/4306 cut-off events. [2021-06-24 18:22:11,495 INFO L130 PetriNetUnfolder]: For 5951/6921 co-relation queries the response was YES. [2021-06-24 18:22:11,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15241 conditions, 4306 events. 2393/4306 cut-off events. For 5951/6921 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 27668 event pairs, 427 based on Foata normal form. 327/4028 useless extension candidates. Maximal degree in co-relation 15219. Up to 1729 conditions per place. [2021-06-24 18:22:11,617 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 14 selfloop transitions, 111 changer transitions 5/157 dead transitions. [2021-06-24 18:22:11,617 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 157 transitions, 1426 flow [2021-06-24 18:22:11,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:22:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-24 18:22:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 247 transitions. [2021-06-24 18:22:11,619 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8821428571428571 [2021-06-24 18:22:11,619 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 247 transitions. [2021-06-24 18:22:11,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 247 transitions. [2021-06-24 18:22:11,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:11,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 247 transitions. [2021-06-24 18:22:11,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 35.285714285714285) internal successors, (247), 7 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,622 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,622 INFO L185 Difference]: Start difference. First operand has 57 places, 84 transitions, 575 flow. Second operand 7 states and 247 transitions. [2021-06-24 18:22:11,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 157 transitions, 1426 flow [2021-06-24 18:22:11,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 157 transitions, 1374 flow, removed 25 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:11,640 INFO L241 Difference]: Finished difference. Result has 65 places, 152 transitions, 1520 flow [2021-06-24 18:22:11,641 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1520, PETRI_PLACES=65, PETRI_TRANSITIONS=152} [2021-06-24 18:22:11,641 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2021-06-24 18:22:11,641 INFO L482 AbstractCegarLoop]: Abstraction has has 65 places, 152 transitions, 1520 flow [2021-06-24 18:22:11,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 29.125) internal successors, (233), 8 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,642 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:11,642 INFO L255 CegarLoopForPetriNet]: 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 18:22:11,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-24 18:22:11,642 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:11,643 INFO L82 PathProgramCache]: Analyzing trace with hash 449427872, now seen corresponding path program 1 times [2021-06-24 18:22:11,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:11,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447789014] [2021-06-24 18:22:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:11,764 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,765 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:11,768 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,768 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,775 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,782 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,793 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,817 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,818 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,820 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,820 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,821 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:11,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,826 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:11,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:11,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447789014] [2021-06-24 18:22:11,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447789014] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:11,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:11,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 18:22:11,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688847672] [2021-06-24 18:22:11,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 18:22:11,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:11,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 18:22:11,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:22:11,830 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:11,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 152 transitions, 1520 flow. Second operand has 9 states, 9 states have (on average 29.22222222222222) internal successors, (263), 9 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:11,831 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:11,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:12,304 INFO L129 PetriNetUnfolder]: 1753/2940 cut-off events. [2021-06-24 18:22:12,305 INFO L130 PetriNetUnfolder]: For 10617/11954 co-relation queries the response was YES. [2021-06-24 18:22:12,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14595 conditions, 2940 events. 1753/2940 cut-off events. For 10617/11954 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16651 event pairs, 210 based on Foata normal form. 544/3274 useless extension candidates. Maximal degree in co-relation 14568. Up to 884 conditions per place. [2021-06-24 18:22:12,334 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 0 selfloop transitions, 0 changer transitions 245/245 dead transitions. [2021-06-24 18:22:12,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 245 transitions, 2959 flow [2021-06-24 18:22:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 18:22:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-24 18:22:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 272 transitions. [2021-06-24 18:22:12,337 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.85 [2021-06-24 18:22:12,337 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 272 transitions. [2021-06-24 18:22:12,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 272 transitions. [2021-06-24 18:22:12,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:12,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 272 transitions. [2021-06-24 18:22:12,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 40.0) internal successors, (360), 9 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,339 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 40.0) internal successors, (360), 9 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,339 INFO L185 Difference]: Start difference. First operand has 65 places, 152 transitions, 1520 flow. Second operand 8 states and 272 transitions. [2021-06-24 18:22:12,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 245 transitions, 2959 flow [2021-06-24 18:22:12,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 245 transitions, 2849 flow, removed 53 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:12,364 INFO L241 Difference]: Finished difference. Result has 66 places, 0 transitions, 0 flow [2021-06-24 18:22:12,364 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=66, PETRI_TRANSITIONS=0} [2021-06-24 18:22:12,364 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 19 predicate places. [2021-06-24 18:22:12,364 INFO L482 AbstractCegarLoop]: Abstraction has has 66 places, 0 transitions, 0 flow [2021-06-24 18:22:12,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 29.22222222222222) internal successors, (263), 9 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-24 18:22:12,365 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork4 was SAFE (2/5) [2021-06-24 18:22:12,365 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:22:12,366 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:22:12,367 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:22:12,367 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:22:12,367 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:22:12,367 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:22:12,367 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:22:12,367 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:22:12,367 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork2======== [2021-06-24 18:22:12,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 18:22:12,371 INFO L129 PetriNetUnfolder]: 4/35 cut-off events. [2021-06-24 18:22:12,371 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:12,371 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 35 events. 4/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 93 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2021-06-24 18:22:12,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 18:22:12,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 35 transitions, 85 flow [2021-06-24 18:22:12,375 INFO L129 PetriNetUnfolder]: 1/21 cut-off events. [2021-06-24 18:22:12,376 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:12,376 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:12,376 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:12,376 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:12,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:12,376 INFO L82 PathProgramCache]: Analyzing trace with hash 799578582, now seen corresponding path program 1 times [2021-06-24 18:22:12,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:12,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215681696] [2021-06-24 18:22:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:12,386 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:12,387 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:12,388 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:12,388 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:12,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:12,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215681696] [2021-06-24 18:22:12,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215681696] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:12,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:12,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:22:12,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429488304] [2021-06-24 18:22:12,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:12,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:12,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:12,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:12,394 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 40 [2021-06-24 18:22:12,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:12,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 40 [2021-06-24 18:22:12,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:12,470 INFO L129 PetriNetUnfolder]: 275/551 cut-off events. [2021-06-24 18:22:12,470 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:12,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 551 events. 275/551 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3070 event pairs, 103 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 936. Up to 259 conditions per place. [2021-06-24 18:22:12,474 INFO L132 encePairwiseOnDemand]: 30/40 looper letters, 8 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2021-06-24 18:22:12,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 121 flow [2021-06-24 18:22:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:12,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2021-06-24 18:22:12,475 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9 [2021-06-24 18:22:12,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2021-06-24 18:22:12,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2021-06-24 18:22:12,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:12,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2021-06-24 18:22:12,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,477 INFO L185 Difference]: Start difference. First operand has 47 places, 35 transitions, 85 flow. Second operand 3 states and 108 transitions. [2021-06-24 18:22:12,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 121 flow [2021-06-24 18:22:12,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 116 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-06-24 18:22:12,479 INFO L241 Difference]: Finished difference. Result has 46 places, 39 transitions, 128 flow [2021-06-24 18:22:12,479 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2021-06-24 18:22:12,480 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2021-06-24 18:22:12,480 INFO L482 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 128 flow [2021-06-24 18:22:12,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,480 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:12,480 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:12,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-24 18:22:12,480 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1799986856, now seen corresponding path program 1 times [2021-06-24 18:22:12,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:12,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217746235] [2021-06-24 18:22:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:12,504 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:12,505 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:12,505 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:12,506 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:12,508 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:12,508 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:12,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:12,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217746235] [2021-06-24 18:22:12,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217746235] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:12,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:12,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:22:12,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397663972] [2021-06-24 18:22:12,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:12,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:12,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:12,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:12,510 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 40 [2021-06-24 18:22:12,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:12,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 40 [2021-06-24 18:22:12,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:12,622 INFO L129 PetriNetUnfolder]: 523/1415 cut-off events. [2021-06-24 18:22:12,623 INFO L130 PetriNetUnfolder]: For 245/245 co-relation queries the response was YES. [2021-06-24 18:22:12,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2722 conditions, 1415 events. 523/1415 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 11571 event pairs, 214 based on Foata normal form. 148/1476 useless extension candidates. Maximal degree in co-relation 2708. Up to 496 conditions per place. [2021-06-24 18:22:12,634 INFO L132 encePairwiseOnDemand]: 35/40 looper letters, 5 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2021-06-24 18:22:12,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 140 flow [2021-06-24 18:22:12,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2021-06-24 18:22:12,636 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9333333333333333 [2021-06-24 18:22:12,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2021-06-24 18:22:12,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2021-06-24 18:22:12,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:12,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2021-06-24 18:22:12,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,637 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,637 INFO L185 Difference]: Start difference. First operand has 46 places, 39 transitions, 128 flow. Second operand 3 states and 112 transitions. [2021-06-24 18:22:12,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 140 flow [2021-06-24 18:22:12,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 128 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:12,641 INFO L241 Difference]: Finished difference. Result has 47 places, 39 transitions, 127 flow [2021-06-24 18:22:12,641 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2021-06-24 18:22:12,641 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2021-06-24 18:22:12,641 INFO L482 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 127 flow [2021-06-24 18:22:12,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,641 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:12,642 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:12,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-24 18:22:12,642 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:12,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:12,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1805860204, now seen corresponding path program 2 times [2021-06-24 18:22:12,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:12,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921209483] [2021-06-24 18:22:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:12,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:12,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:12,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:12,671 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:12,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:12,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:12,686 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:12,686 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:12,690 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:12,691 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:12,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:12,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921209483] [2021-06-24 18:22:12,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921209483] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:12,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:12,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:22:12,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105046921] [2021-06-24 18:22:12,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:22:12,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:12,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:22:12,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:22:12,698 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:12,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:12,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:12,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:12,936 INFO L129 PetriNetUnfolder]: 1455/2924 cut-off events. [2021-06-24 18:22:12,937 INFO L130 PetriNetUnfolder]: For 175/214 co-relation queries the response was YES. [2021-06-24 18:22:12,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5826 conditions, 2924 events. 1455/2924 cut-off events. For 175/214 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20401 event pairs, 298 based on Foata normal form. 44/2463 useless extension candidates. Maximal degree in co-relation 5811. Up to 1072 conditions per place. [2021-06-24 18:22:12,960 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 14 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2021-06-24 18:22:12,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 239 flow [2021-06-24 18:22:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:22:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-24 18:22:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 171 transitions. [2021-06-24 18:22:12,962 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.855 [2021-06-24 18:22:12,962 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 171 transitions. [2021-06-24 18:22:12,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 171 transitions. [2021-06-24 18:22:12,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:12,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 171 transitions. [2021-06-24 18:22:12,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,963 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,963 INFO L185 Difference]: Start difference. First operand has 47 places, 39 transitions, 127 flow. Second operand 5 states and 171 transitions. [2021-06-24 18:22:12,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 239 flow [2021-06-24 18:22:12,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:12,965 INFO L241 Difference]: Finished difference. Result has 51 places, 53 transitions, 229 flow [2021-06-24 18:22:12,965 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2021-06-24 18:22:12,966 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2021-06-24 18:22:12,966 INFO L482 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 229 flow [2021-06-24 18:22:12,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,966 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:12,966 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:12,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-24 18:22:12,966 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:12,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:12,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1895866627, now seen corresponding path program 1 times [2021-06-24 18:22:12,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:12,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576704209] [2021-06-24 18:22:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:12,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:12,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:12,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:12,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:13,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:13,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:13,009 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:13,010 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:13,018 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:13,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:13,022 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:13,022 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:13,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:13,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:13,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:13,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576704209] [2021-06-24 18:22:13,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576704209] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:13,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:13,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:22:13,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37162083] [2021-06-24 18:22:13,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:22:13,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:13,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:22:13,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:22:13,029 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:13,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:13,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:13,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:13,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:13,423 INFO L129 PetriNetUnfolder]: 2096/3958 cut-off events. [2021-06-24 18:22:13,424 INFO L130 PetriNetUnfolder]: For 1391/1851 co-relation queries the response was YES. [2021-06-24 18:22:13,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10429 conditions, 3958 events. 2096/3958 cut-off events. For 1391/1851 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 26836 event pairs, 395 based on Foata normal form. 181/3519 useless extension candidates. Maximal degree in co-relation 10411. Up to 1454 conditions per place. [2021-06-24 18:22:13,474 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 14 selfloop transitions, 47 changer transitions 6/94 dead transitions. [2021-06-24 18:22:13,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 573 flow [2021-06-24 18:22:13,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:22:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-24 18:22:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2021-06-24 18:22:13,476 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8708333333333333 [2021-06-24 18:22:13,476 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 209 transitions. [2021-06-24 18:22:13,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 209 transitions. [2021-06-24 18:22:13,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:13,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 209 transitions. [2021-06-24 18:22:13,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:13,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:13,478 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:13,478 INFO L185 Difference]: Start difference. First operand has 51 places, 53 transitions, 229 flow. Second operand 6 states and 209 transitions. [2021-06-24 18:22:13,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 573 flow [2021-06-24 18:22:13,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 571 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:13,483 INFO L241 Difference]: Finished difference. Result has 57 places, 84 transitions, 575 flow [2021-06-24 18:22:13,484 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=57, PETRI_TRANSITIONS=84} [2021-06-24 18:22:13,484 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 10 predicate places. [2021-06-24 18:22:13,485 INFO L482 AbstractCegarLoop]: Abstraction has has 57 places, 84 transitions, 575 flow [2021-06-24 18:22:13,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:13,485 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:13,485 INFO L255 CegarLoopForPetriNet]: 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 18:22:13,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-24 18:22:13,485 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:13,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:13,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2095401937, now seen corresponding path program 1 times [2021-06-24 18:22:13,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:13,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931023332] [2021-06-24 18:22:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:13,516 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:13,516 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:13,522 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:13,523 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:13,534 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:13,539 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:13,546 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:13,546 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:13,554 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:13,555 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:13,564 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:13,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:13,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:13,569 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:13,569 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:13,569 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:13,573 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:13,574 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:13,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:13,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931023332] [2021-06-24 18:22:13,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931023332] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:13,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:13,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:22:13,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478143037] [2021-06-24 18:22:13,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:22:13,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:13,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:22:13,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:22:13,576 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:13,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 84 transitions, 575 flow. Second operand has 8 states, 8 states have (on average 29.125) internal successors, (233), 8 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:13,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:13,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:13,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:14,058 INFO L129 PetriNetUnfolder]: 2393/4306 cut-off events. [2021-06-24 18:22:14,059 INFO L130 PetriNetUnfolder]: For 5951/6921 co-relation queries the response was YES. [2021-06-24 18:22:14,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15241 conditions, 4306 events. 2393/4306 cut-off events. For 5951/6921 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 27668 event pairs, 427 based on Foata normal form. 327/4028 useless extension candidates. Maximal degree in co-relation 15219. Up to 1729 conditions per place. [2021-06-24 18:22:14,111 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 14 selfloop transitions, 111 changer transitions 5/157 dead transitions. [2021-06-24 18:22:14,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 157 transitions, 1426 flow [2021-06-24 18:22:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:22:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-24 18:22:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 247 transitions. [2021-06-24 18:22:14,113 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8821428571428571 [2021-06-24 18:22:14,113 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 247 transitions. [2021-06-24 18:22:14,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 247 transitions. [2021-06-24 18:22:14,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:14,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 247 transitions. [2021-06-24 18:22:14,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 35.285714285714285) internal successors, (247), 7 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,114 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,115 INFO L185 Difference]: Start difference. First operand has 57 places, 84 transitions, 575 flow. Second operand 7 states and 247 transitions. [2021-06-24 18:22:14,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 157 transitions, 1426 flow [2021-06-24 18:22:14,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 157 transitions, 1374 flow, removed 25 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:14,126 INFO L241 Difference]: Finished difference. Result has 65 places, 152 transitions, 1520 flow [2021-06-24 18:22:14,126 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1520, PETRI_PLACES=65, PETRI_TRANSITIONS=152} [2021-06-24 18:22:14,127 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2021-06-24 18:22:14,127 INFO L482 AbstractCegarLoop]: Abstraction has has 65 places, 152 transitions, 1520 flow [2021-06-24 18:22:14,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 29.125) internal successors, (233), 8 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,127 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:14,127 INFO L255 CegarLoopForPetriNet]: 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 18:22:14,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-24 18:22:14,127 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:14,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1242262643, now seen corresponding path program 1 times [2021-06-24 18:22:14,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:14,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014752369] [2021-06-24 18:22:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:14,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:14,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,170 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:14,177 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:14,187 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:14,194 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,194 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:14,202 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,203 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:14,211 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,211 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:14,212 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:14,215 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,216 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:14,216 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:14,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:14,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:14,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014752369] [2021-06-24 18:22:14,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014752369] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:14,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:14,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 18:22:14,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076513360] [2021-06-24 18:22:14,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 18:22:14,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:14,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 18:22:14,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:22:14,223 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:14,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 152 transitions, 1520 flow. Second operand has 9 states, 9 states have (on average 29.22222222222222) internal successors, (263), 9 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:14,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:14,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:14,609 INFO L129 PetriNetUnfolder]: 1753/2940 cut-off events. [2021-06-24 18:22:14,610 INFO L130 PetriNetUnfolder]: For 10617/11954 co-relation queries the response was YES. [2021-06-24 18:22:14,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14595 conditions, 2940 events. 1753/2940 cut-off events. For 10617/11954 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16651 event pairs, 210 based on Foata normal form. 544/3274 useless extension candidates. Maximal degree in co-relation 14568. Up to 884 conditions per place. [2021-06-24 18:22:14,639 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 0 selfloop transitions, 0 changer transitions 245/245 dead transitions. [2021-06-24 18:22:14,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 245 transitions, 2959 flow [2021-06-24 18:22:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 18:22:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-24 18:22:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 272 transitions. [2021-06-24 18:22:14,641 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.85 [2021-06-24 18:22:14,641 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 272 transitions. [2021-06-24 18:22:14,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 272 transitions. [2021-06-24 18:22:14,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:14,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 272 transitions. [2021-06-24 18:22:14,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 40.0) internal successors, (360), 9 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,643 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 40.0) internal successors, (360), 9 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,643 INFO L185 Difference]: Start difference. First operand has 65 places, 152 transitions, 1520 flow. Second operand 8 states and 272 transitions. [2021-06-24 18:22:14,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 245 transitions, 2959 flow [2021-06-24 18:22:14,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 245 transitions, 2849 flow, removed 53 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:14,677 INFO L241 Difference]: Finished difference. Result has 66 places, 0 transitions, 0 flow [2021-06-24 18:22:14,677 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=66, PETRI_TRANSITIONS=0} [2021-06-24 18:22:14,677 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 19 predicate places. [2021-06-24 18:22:14,677 INFO L482 AbstractCegarLoop]: Abstraction has has 66 places, 0 transitions, 0 flow [2021-06-24 18:22:14,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 29.22222222222222) internal successors, (263), 9 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-24 18:22:14,678 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork2 was SAFE (3/5) [2021-06-24 18:22:14,679 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:22:14,680 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:22:14,680 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:22:14,680 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:22:14,680 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:22:14,680 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:22:14,680 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:22:14,680 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:22:14,681 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork3======== [2021-06-24 18:22:14,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 18:22:14,685 INFO L129 PetriNetUnfolder]: 4/35 cut-off events. [2021-06-24 18:22:14,686 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:14,686 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 35 events. 4/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 93 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2021-06-24 18:22:14,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 18:22:14,687 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 35 transitions, 85 flow [2021-06-24 18:22:14,689 INFO L129 PetriNetUnfolder]: 3/27 cut-off events. [2021-06-24 18:22:14,689 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:14,689 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:14,689 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:14,689 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:14,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:14,690 INFO L82 PathProgramCache]: Analyzing trace with hash -982842544, now seen corresponding path program 1 times [2021-06-24 18:22:14,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:14,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112788185] [2021-06-24 18:22:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:14,697 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,697 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:14,697 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:14,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:14,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112788185] [2021-06-24 18:22:14,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112788185] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:14,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:14,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:22:14,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576983433] [2021-06-24 18:22:14,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:14,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:14,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:14,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:14,703 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 40 [2021-06-24 18:22:14,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:14,703 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 40 [2021-06-24 18:22:14,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:14,746 INFO L129 PetriNetUnfolder]: 275/551 cut-off events. [2021-06-24 18:22:14,746 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:14,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 551 events. 275/551 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3070 event pairs, 103 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 936. Up to 259 conditions per place. [2021-06-24 18:22:14,751 INFO L132 encePairwiseOnDemand]: 30/40 looper letters, 8 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2021-06-24 18:22:14,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 121 flow [2021-06-24 18:22:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2021-06-24 18:22:14,753 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9 [2021-06-24 18:22:14,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2021-06-24 18:22:14,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2021-06-24 18:22:14,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:14,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2021-06-24 18:22:14,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,754 INFO L185 Difference]: Start difference. First operand has 47 places, 35 transitions, 85 flow. Second operand 3 states and 108 transitions. [2021-06-24 18:22:14,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 121 flow [2021-06-24 18:22:14,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 116 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-06-24 18:22:14,756 INFO L241 Difference]: Finished difference. Result has 46 places, 39 transitions, 128 flow [2021-06-24 18:22:14,756 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2021-06-24 18:22:14,756 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2021-06-24 18:22:14,756 INFO L482 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 128 flow [2021-06-24 18:22:14,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,756 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:14,756 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:14,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-24 18:22:14,756 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:14,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:14,757 INFO L82 PathProgramCache]: Analyzing trace with hash 35007502, now seen corresponding path program 1 times [2021-06-24 18:22:14,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:14,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775378811] [2021-06-24 18:22:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:14,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:14,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:14,769 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:14,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:14,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775378811] [2021-06-24 18:22:14,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775378811] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:14,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:14,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:22:14,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843302323] [2021-06-24 18:22:14,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:14,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:14,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:14,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:14,773 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 40 [2021-06-24 18:22:14,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:14,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 40 [2021-06-24 18:22:14,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:14,858 INFO L129 PetriNetUnfolder]: 523/1415 cut-off events. [2021-06-24 18:22:14,858 INFO L130 PetriNetUnfolder]: For 245/245 co-relation queries the response was YES. [2021-06-24 18:22:14,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2722 conditions, 1415 events. 523/1415 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 11571 event pairs, 214 based on Foata normal form. 148/1476 useless extension candidates. Maximal degree in co-relation 2708. Up to 496 conditions per place. [2021-06-24 18:22:14,871 INFO L132 encePairwiseOnDemand]: 35/40 looper letters, 5 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2021-06-24 18:22:14,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 140 flow [2021-06-24 18:22:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2021-06-24 18:22:14,872 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9333333333333333 [2021-06-24 18:22:14,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2021-06-24 18:22:14,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2021-06-24 18:22:14,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:14,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2021-06-24 18:22:14,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,873 INFO L185 Difference]: Start difference. First operand has 46 places, 39 transitions, 128 flow. Second operand 3 states and 112 transitions. [2021-06-24 18:22:14,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 140 flow [2021-06-24 18:22:14,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 128 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:14,877 INFO L241 Difference]: Finished difference. Result has 47 places, 39 transitions, 127 flow [2021-06-24 18:22:14,877 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2021-06-24 18:22:14,877 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2021-06-24 18:22:14,877 INFO L482 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 127 flow [2021-06-24 18:22:14,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,877 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:14,877 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:14,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-24 18:22:14,878 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:14,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:14,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1194551694, now seen corresponding path program 2 times [2021-06-24 18:22:14,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:14,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73132889] [2021-06-24 18:22:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:14,885 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,886 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:14,889 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:14,895 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,896 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:14,902 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:14,907 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:14,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:14,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:14,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73132889] [2021-06-24 18:22:14,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73132889] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:14,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:14,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:22:14,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354016442] [2021-06-24 18:22:14,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:22:14,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:14,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:22:14,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:22:14,909 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:14,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:14,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:14,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:14,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:15,161 INFO L129 PetriNetUnfolder]: 1455/2924 cut-off events. [2021-06-24 18:22:15,162 INFO L130 PetriNetUnfolder]: For 175/214 co-relation queries the response was YES. [2021-06-24 18:22:15,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5826 conditions, 2924 events. 1455/2924 cut-off events. For 175/214 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20401 event pairs, 298 based on Foata normal form. 44/2463 useless extension candidates. Maximal degree in co-relation 5811. Up to 1072 conditions per place. [2021-06-24 18:22:15,186 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 14 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2021-06-24 18:22:15,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 239 flow [2021-06-24 18:22:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:22:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-24 18:22:15,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 171 transitions. [2021-06-24 18:22:15,188 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.855 [2021-06-24 18:22:15,188 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 171 transitions. [2021-06-24 18:22:15,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 171 transitions. [2021-06-24 18:22:15,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:15,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 171 transitions. [2021-06-24 18:22:15,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:15,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:15,189 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:15,189 INFO L185 Difference]: Start difference. First operand has 47 places, 39 transitions, 127 flow. Second operand 5 states and 171 transitions. [2021-06-24 18:22:15,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 239 flow [2021-06-24 18:22:15,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:15,192 INFO L241 Difference]: Finished difference. Result has 51 places, 53 transitions, 229 flow [2021-06-24 18:22:15,192 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2021-06-24 18:22:15,192 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2021-06-24 18:22:15,192 INFO L482 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 229 flow [2021-06-24 18:22:15,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:15,192 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:15,192 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:15,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-24 18:22:15,193 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:15,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:15,193 INFO L82 PathProgramCache]: Analyzing trace with hash -241575191, now seen corresponding path program 1 times [2021-06-24 18:22:15,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:15,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425431557] [2021-06-24 18:22:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:15,214 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,214 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:15,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,222 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:15,228 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:15,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:15,250 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:15,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,252 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:15,256 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:15,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:15,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425431557] [2021-06-24 18:22:15,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425431557] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:15,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:15,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:22:15,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299526944] [2021-06-24 18:22:15,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:22:15,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:15,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:22:15,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:22:15,261 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:15,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:15,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:15,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:15,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:15,582 INFO L129 PetriNetUnfolder]: 2096/3958 cut-off events. [2021-06-24 18:22:15,582 INFO L130 PetriNetUnfolder]: For 1391/1851 co-relation queries the response was YES. [2021-06-24 18:22:15,603 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10429 conditions, 3958 events. 2096/3958 cut-off events. For 1391/1851 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 26836 event pairs, 395 based on Foata normal form. 181/3519 useless extension candidates. Maximal degree in co-relation 10411. Up to 1454 conditions per place. [2021-06-24 18:22:15,623 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 14 selfloop transitions, 47 changer transitions 6/94 dead transitions. [2021-06-24 18:22:15,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 573 flow [2021-06-24 18:22:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:22:15,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-24 18:22:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2021-06-24 18:22:15,626 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8708333333333333 [2021-06-24 18:22:15,626 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 209 transitions. [2021-06-24 18:22:15,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 209 transitions. [2021-06-24 18:22:15,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:15,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 209 transitions. [2021-06-24 18:22:15,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:15,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:15,627 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:15,627 INFO L185 Difference]: Start difference. First operand has 51 places, 53 transitions, 229 flow. Second operand 6 states and 209 transitions. [2021-06-24 18:22:15,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 573 flow [2021-06-24 18:22:15,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 571 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:15,631 INFO L241 Difference]: Finished difference. Result has 57 places, 84 transitions, 575 flow [2021-06-24 18:22:15,631 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=57, PETRI_TRANSITIONS=84} [2021-06-24 18:22:15,631 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 10 predicate places. [2021-06-24 18:22:15,631 INFO L482 AbstractCegarLoop]: Abstraction has has 57 places, 84 transitions, 575 flow [2021-06-24 18:22:15,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:15,631 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:15,632 INFO L255 CegarLoopForPetriNet]: 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 18:22:15,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-24 18:22:15,632 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:15,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2067863276, now seen corresponding path program 1 times [2021-06-24 18:22:15,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:15,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505640956] [2021-06-24 18:22:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:15,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:15,662 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,662 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:15,668 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:15,676 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:15,686 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,687 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:15,705 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:15,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:15,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:15,714 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:15,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:15,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:15,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505640956] [2021-06-24 18:22:15,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505640956] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:15,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:15,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:22:15,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649570552] [2021-06-24 18:22:15,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:22:15,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:15,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:22:15,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:22:15,717 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:15,717 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 84 transitions, 575 flow. Second operand has 8 states, 8 states have (on average 29.125) internal successors, (233), 8 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:15,717 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:15,717 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:15,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:16,138 INFO L129 PetriNetUnfolder]: 2393/4306 cut-off events. [2021-06-24 18:22:16,138 INFO L130 PetriNetUnfolder]: For 5951/6921 co-relation queries the response was YES. [2021-06-24 18:22:16,170 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15241 conditions, 4306 events. 2393/4306 cut-off events. For 5951/6921 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 27668 event pairs, 427 based on Foata normal form. 327/4028 useless extension candidates. Maximal degree in co-relation 15219. Up to 1729 conditions per place. [2021-06-24 18:22:16,200 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 14 selfloop transitions, 111 changer transitions 5/157 dead transitions. [2021-06-24 18:22:16,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 157 transitions, 1426 flow [2021-06-24 18:22:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:22:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-24 18:22:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 247 transitions. [2021-06-24 18:22:16,201 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8821428571428571 [2021-06-24 18:22:16,201 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 247 transitions. [2021-06-24 18:22:16,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 247 transitions. [2021-06-24 18:22:16,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:16,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 247 transitions. [2021-06-24 18:22:16,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 35.285714285714285) internal successors, (247), 7 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,203 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,203 INFO L185 Difference]: Start difference. First operand has 57 places, 84 transitions, 575 flow. Second operand 7 states and 247 transitions. [2021-06-24 18:22:16,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 157 transitions, 1426 flow [2021-06-24 18:22:16,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 157 transitions, 1374 flow, removed 25 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:16,215 INFO L241 Difference]: Finished difference. Result has 65 places, 152 transitions, 1520 flow [2021-06-24 18:22:16,215 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1520, PETRI_PLACES=65, PETRI_TRANSITIONS=152} [2021-06-24 18:22:16,215 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2021-06-24 18:22:16,215 INFO L482 AbstractCegarLoop]: Abstraction has has 65 places, 152 transitions, 1520 flow [2021-06-24 18:22:16,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 29.125) internal successors, (233), 8 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,216 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:16,216 INFO L255 CegarLoopForPetriNet]: 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 18:22:16,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-24 18:22:16,216 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:16,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:16,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1410669622, now seen corresponding path program 1 times [2021-06-24 18:22:16,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:16,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326763275] [2021-06-24 18:22:16,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:16,236 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,236 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:16,239 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,239 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:16,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:16,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,252 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:16,259 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,259 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:16,267 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:16,277 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:16,278 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:16,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:16,280 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,280 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:16,288 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:16,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:16,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326763275] [2021-06-24 18:22:16,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326763275] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:16,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:16,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 18:22:16,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834550688] [2021-06-24 18:22:16,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 18:22:16,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:16,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 18:22:16,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:22:16,291 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:16,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 152 transitions, 1520 flow. Second operand has 9 states, 9 states have (on average 29.22222222222222) internal successors, (263), 9 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:16,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:16,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:16,640 INFO L129 PetriNetUnfolder]: 1753/2940 cut-off events. [2021-06-24 18:22:16,640 INFO L130 PetriNetUnfolder]: For 10617/11954 co-relation queries the response was YES. [2021-06-24 18:22:16,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14595 conditions, 2940 events. 1753/2940 cut-off events. For 10617/11954 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16651 event pairs, 210 based on Foata normal form. 544/3274 useless extension candidates. Maximal degree in co-relation 14568. Up to 884 conditions per place. [2021-06-24 18:22:16,666 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 0 selfloop transitions, 0 changer transitions 245/245 dead transitions. [2021-06-24 18:22:16,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 245 transitions, 2959 flow [2021-06-24 18:22:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 18:22:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-24 18:22:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 272 transitions. [2021-06-24 18:22:16,668 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.85 [2021-06-24 18:22:16,668 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 272 transitions. [2021-06-24 18:22:16,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 272 transitions. [2021-06-24 18:22:16,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:16,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 272 transitions. [2021-06-24 18:22:16,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 40.0) internal successors, (360), 9 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,670 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 40.0) internal successors, (360), 9 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,670 INFO L185 Difference]: Start difference. First operand has 65 places, 152 transitions, 1520 flow. Second operand 8 states and 272 transitions. [2021-06-24 18:22:16,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 245 transitions, 2959 flow [2021-06-24 18:22:16,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 245 transitions, 2849 flow, removed 53 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:16,697 INFO L241 Difference]: Finished difference. Result has 66 places, 0 transitions, 0 flow [2021-06-24 18:22:16,697 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=66, PETRI_TRANSITIONS=0} [2021-06-24 18:22:16,697 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 19 predicate places. [2021-06-24 18:22:16,697 INFO L482 AbstractCegarLoop]: Abstraction has has 66 places, 0 transitions, 0 flow [2021-06-24 18:22:16,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 29.22222222222222) internal successors, (263), 9 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-24 18:22:16,698 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork3 was SAFE (4/5) [2021-06-24 18:22:16,698 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:22:16,699 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:22:16,699 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:22:16,699 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:22:16,699 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:22:16,699 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:22:16,699 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:22:16,699 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:22:16,699 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork1======== [2021-06-24 18:22:16,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 18:22:16,702 INFO L129 PetriNetUnfolder]: 4/35 cut-off events. [2021-06-24 18:22:16,702 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:16,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 35 events. 4/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 93 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2021-06-24 18:22:16,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 40 transitions, 105 flow [2021-06-24 18:22:16,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 35 transitions, 85 flow [2021-06-24 18:22:16,703 INFO L129 PetriNetUnfolder]: 1/17 cut-off events. [2021-06-24 18:22:16,703 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:16,703 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:16,703 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:16,703 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:16,704 INFO L82 PathProgramCache]: Analyzing trace with hash 2104002414, now seen corresponding path program 1 times [2021-06-24 18:22:16,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:16,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171562812] [2021-06-24 18:22:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:16,708 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,708 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:16,708 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:16,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:16,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171562812] [2021-06-24 18:22:16,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171562812] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:16,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:16,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:22:16,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541809982] [2021-06-24 18:22:16,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:16,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:16,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:16,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:16,713 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 40 [2021-06-24 18:22:16,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:16,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 40 [2021-06-24 18:22:16,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:16,752 INFO L129 PetriNetUnfolder]: 275/551 cut-off events. [2021-06-24 18:22:16,752 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:16,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 551 events. 275/551 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3070 event pairs, 103 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 936. Up to 259 conditions per place. [2021-06-24 18:22:16,756 INFO L132 encePairwiseOnDemand]: 30/40 looper letters, 8 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2021-06-24 18:22:16,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 121 flow [2021-06-24 18:22:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2021-06-24 18:22:16,758 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9 [2021-06-24 18:22:16,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2021-06-24 18:22:16,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2021-06-24 18:22:16,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:16,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2021-06-24 18:22:16,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,759 INFO L185 Difference]: Start difference. First operand has 47 places, 35 transitions, 85 flow. Second operand 3 states and 108 transitions. [2021-06-24 18:22:16,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 121 flow [2021-06-24 18:22:16,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 116 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-06-24 18:22:16,760 INFO L241 Difference]: Finished difference. Result has 46 places, 39 transitions, 128 flow [2021-06-24 18:22:16,760 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2021-06-24 18:22:16,760 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2021-06-24 18:22:16,760 INFO L482 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 128 flow [2021-06-24 18:22:16,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,760 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:16,760 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:16,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-24 18:22:16,761 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:16,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:16,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1604503468, now seen corresponding path program 1 times [2021-06-24 18:22:16,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:16,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676689694] [2021-06-24 18:22:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:16,772 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:16,773 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:16,776 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,776 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:16,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:16,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676689694] [2021-06-24 18:22:16,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676689694] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:16,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:16,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:22:16,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279786734] [2021-06-24 18:22:16,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:16,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:16,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:16,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:16,778 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 40 [2021-06-24 18:22:16,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:16,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 40 [2021-06-24 18:22:16,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:16,852 INFO L129 PetriNetUnfolder]: 523/1415 cut-off events. [2021-06-24 18:22:16,852 INFO L130 PetriNetUnfolder]: For 245/245 co-relation queries the response was YES. [2021-06-24 18:22:16,857 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2722 conditions, 1415 events. 523/1415 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 11571 event pairs, 214 based on Foata normal form. 148/1476 useless extension candidates. Maximal degree in co-relation 2708. Up to 496 conditions per place. [2021-06-24 18:22:16,862 INFO L132 encePairwiseOnDemand]: 35/40 looper letters, 5 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2021-06-24 18:22:16,862 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 140 flow [2021-06-24 18:22:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:16,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:16,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2021-06-24 18:22:16,863 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9333333333333333 [2021-06-24 18:22:16,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2021-06-24 18:22:16,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2021-06-24 18:22:16,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:16,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2021-06-24 18:22:16,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,864 INFO L185 Difference]: Start difference. First operand has 46 places, 39 transitions, 128 flow. Second operand 3 states and 112 transitions. [2021-06-24 18:22:16,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 140 flow [2021-06-24 18:22:16,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 128 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:16,867 INFO L241 Difference]: Finished difference. Result has 47 places, 39 transitions, 127 flow [2021-06-24 18:22:16,868 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2021-06-24 18:22:16,868 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2021-06-24 18:22:16,868 INFO L482 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 127 flow [2021-06-24 18:22:16,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,868 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:16,868 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:16,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-24 18:22:16,868 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:16,869 INFO L82 PathProgramCache]: Analyzing trace with hash -30459604, now seen corresponding path program 2 times [2021-06-24 18:22:16,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:16,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129413897] [2021-06-24 18:22:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:16,875 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:16,880 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:16,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:16,893 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,893 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:16,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:16,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:16,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:16,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129413897] [2021-06-24 18:22:16,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129413897] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:16,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:16,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:22:16,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519225082] [2021-06-24 18:22:16,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:22:16,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:16,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:22:16,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:22:16,899 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:16,899 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:16,899 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:16,899 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:16,899 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:17,096 INFO L129 PetriNetUnfolder]: 1455/2924 cut-off events. [2021-06-24 18:22:17,096 INFO L130 PetriNetUnfolder]: For 175/214 co-relation queries the response was YES. [2021-06-24 18:22:17,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5826 conditions, 2924 events. 1455/2924 cut-off events. For 175/214 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20401 event pairs, 298 based on Foata normal form. 44/2463 useless extension candidates. Maximal degree in co-relation 5811. Up to 1072 conditions per place. [2021-06-24 18:22:17,119 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 14 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2021-06-24 18:22:17,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 239 flow [2021-06-24 18:22:17,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:22:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-24 18:22:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 171 transitions. [2021-06-24 18:22:17,120 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.855 [2021-06-24 18:22:17,120 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 171 transitions. [2021-06-24 18:22:17,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 171 transitions. [2021-06-24 18:22:17,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:17,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 171 transitions. [2021-06-24 18:22:17,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:17,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:17,122 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:17,122 INFO L185 Difference]: Start difference. First operand has 47 places, 39 transitions, 127 flow. Second operand 5 states and 171 transitions. [2021-06-24 18:22:17,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 239 flow [2021-06-24 18:22:17,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:17,124 INFO L241 Difference]: Finished difference. Result has 51 places, 53 transitions, 229 flow [2021-06-24 18:22:17,124 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2021-06-24 18:22:17,124 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2021-06-24 18:22:17,124 INFO L482 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 229 flow [2021-06-24 18:22:17,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:17,125 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:17,125 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:17,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-24 18:22:17,125 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:17,125 INFO L82 PathProgramCache]: Analyzing trace with hash -445938647, now seen corresponding path program 1 times [2021-06-24 18:22:17,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:17,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946522326] [2021-06-24 18:22:17,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:17,132 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,133 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:17,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:17,147 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,148 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:17,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,156 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:17,164 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:17,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:17,172 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:17,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:17,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946522326] [2021-06-24 18:22:17,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946522326] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:17,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:17,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:22:17,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821250520] [2021-06-24 18:22:17,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:22:17,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:17,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:22:17,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:22:17,175 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:17,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:17,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:17,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:17,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:17,488 INFO L129 PetriNetUnfolder]: 2096/3958 cut-off events. [2021-06-24 18:22:17,488 INFO L130 PetriNetUnfolder]: For 1391/1851 co-relation queries the response was YES. [2021-06-24 18:22:17,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10429 conditions, 3958 events. 2096/3958 cut-off events. For 1391/1851 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 26836 event pairs, 395 based on Foata normal form. 181/3519 useless extension candidates. Maximal degree in co-relation 10411. Up to 1454 conditions per place. [2021-06-24 18:22:17,524 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 14 selfloop transitions, 47 changer transitions 6/94 dead transitions. [2021-06-24 18:22:17,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 573 flow [2021-06-24 18:22:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:22:17,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-24 18:22:17,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2021-06-24 18:22:17,525 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8708333333333333 [2021-06-24 18:22:17,525 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 209 transitions. [2021-06-24 18:22:17,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 209 transitions. [2021-06-24 18:22:17,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:17,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 209 transitions. [2021-06-24 18:22:17,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:17,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:17,527 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:17,527 INFO L185 Difference]: Start difference. First operand has 51 places, 53 transitions, 229 flow. Second operand 6 states and 209 transitions. [2021-06-24 18:22:17,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 573 flow [2021-06-24 18:22:17,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 571 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:17,530 INFO L241 Difference]: Finished difference. Result has 57 places, 84 transitions, 575 flow [2021-06-24 18:22:17,530 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=57, PETRI_TRANSITIONS=84} [2021-06-24 18:22:17,530 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 10 predicate places. [2021-06-24 18:22:17,530 INFO L482 AbstractCegarLoop]: Abstraction has has 57 places, 84 transitions, 575 flow [2021-06-24 18:22:17,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:17,531 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:17,531 INFO L255 CegarLoopForPetriNet]: 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 18:22:17,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-24 18:22:17,531 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:17,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1542748935, now seen corresponding path program 1 times [2021-06-24 18:22:17,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:17,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910832749] [2021-06-24 18:22:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:17,548 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,549 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:17,551 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,552 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:17,557 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,558 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:17,564 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,564 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:17,571 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:17,579 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,580 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:17,580 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,581 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:17,581 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,582 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:17,585 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:17,586 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:17,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:17,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910832749] [2021-06-24 18:22:17,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910832749] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:17,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:17,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:22:17,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609465750] [2021-06-24 18:22:17,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:22:17,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:17,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:22:17,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:22:17,588 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:17,589 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 84 transitions, 575 flow. Second operand has 8 states, 8 states have (on average 29.125) internal successors, (233), 8 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:17,589 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:17,589 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:17,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:17,978 INFO L129 PetriNetUnfolder]: 2393/4306 cut-off events. [2021-06-24 18:22:17,978 INFO L130 PetriNetUnfolder]: For 5951/6921 co-relation queries the response was YES. [2021-06-24 18:22:18,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15241 conditions, 4306 events. 2393/4306 cut-off events. For 5951/6921 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 27668 event pairs, 427 based on Foata normal form. 327/4028 useless extension candidates. Maximal degree in co-relation 15219. Up to 1729 conditions per place. [2021-06-24 18:22:18,022 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 14 selfloop transitions, 111 changer transitions 5/157 dead transitions. [2021-06-24 18:22:18,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 157 transitions, 1426 flow [2021-06-24 18:22:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:22:18,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-24 18:22:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 247 transitions. [2021-06-24 18:22:18,024 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8821428571428571 [2021-06-24 18:22:18,024 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 247 transitions. [2021-06-24 18:22:18,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 247 transitions. [2021-06-24 18:22:18,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:18,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 247 transitions. [2021-06-24 18:22:18,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 35.285714285714285) internal successors, (247), 7 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:18,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:18,025 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:18,025 INFO L185 Difference]: Start difference. First operand has 57 places, 84 transitions, 575 flow. Second operand 7 states and 247 transitions. [2021-06-24 18:22:18,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 157 transitions, 1426 flow [2021-06-24 18:22:18,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 157 transitions, 1374 flow, removed 25 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:18,036 INFO L241 Difference]: Finished difference. Result has 65 places, 152 transitions, 1520 flow [2021-06-24 18:22:18,036 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1520, PETRI_PLACES=65, PETRI_TRANSITIONS=152} [2021-06-24 18:22:18,036 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2021-06-24 18:22:18,036 INFO L482 AbstractCegarLoop]: Abstraction has has 65 places, 152 transitions, 1520 flow [2021-06-24 18:22:18,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 29.125) internal successors, (233), 8 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:18,037 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:18,037 INFO L255 CegarLoopForPetriNet]: 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 18:22:18,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-24 18:22:18,037 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:18,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:18,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1509051451, now seen corresponding path program 1 times [2021-06-24 18:22:18,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:18,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025325358] [2021-06-24 18:22:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:18,056 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:18,057 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:18,059 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:18,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:18,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:18,067 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:18,073 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:18,073 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:18,080 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:18,082 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:18,091 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:18,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:18,101 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:18,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:18,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:18,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:18,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:18,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:18,105 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:18,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:18,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:18,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:22:18,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:18,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025325358] [2021-06-24 18:22:18,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025325358] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:18,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:18,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 18:22:18,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355593976] [2021-06-24 18:22:18,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 18:22:18,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:18,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 18:22:18,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:22:18,115 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-06-24 18:22:18,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 152 transitions, 1520 flow. Second operand has 9 states, 9 states have (on average 29.22222222222222) internal successors, (263), 9 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:18,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:18,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-06-24 18:22:18,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:18,485 INFO L129 PetriNetUnfolder]: 1753/2940 cut-off events. [2021-06-24 18:22:18,486 INFO L130 PetriNetUnfolder]: For 10617/11954 co-relation queries the response was YES. [2021-06-24 18:22:18,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14595 conditions, 2940 events. 1753/2940 cut-off events. For 10617/11954 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16651 event pairs, 210 based on Foata normal form. 544/3274 useless extension candidates. Maximal degree in co-relation 14568. Up to 884 conditions per place. [2021-06-24 18:22:18,510 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 0 selfloop transitions, 0 changer transitions 245/245 dead transitions. [2021-06-24 18:22:18,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 245 transitions, 2959 flow [2021-06-24 18:22:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 18:22:18,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-24 18:22:18,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 272 transitions. [2021-06-24 18:22:18,512 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.85 [2021-06-24 18:22:18,512 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 272 transitions. [2021-06-24 18:22:18,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 272 transitions. [2021-06-24 18:22:18,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:18,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 272 transitions. [2021-06-24 18:22:18,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:18,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 40.0) internal successors, (360), 9 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:18,518 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 40.0) internal successors, (360), 9 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:18,518 INFO L185 Difference]: Start difference. First operand has 65 places, 152 transitions, 1520 flow. Second operand 8 states and 272 transitions. [2021-06-24 18:22:18,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 245 transitions, 2959 flow [2021-06-24 18:22:18,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 245 transitions, 2849 flow, removed 53 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:18,543 INFO L241 Difference]: Finished difference. Result has 66 places, 0 transitions, 0 flow [2021-06-24 18:22:18,544 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=66, PETRI_TRANSITIONS=0} [2021-06-24 18:22:18,544 INFO L335 CegarLoopForPetriNet]: 47 programPoint places, 19 predicate places. [2021-06-24 18:22:18,544 INFO L482 AbstractCegarLoop]: Abstraction has has 66 places, 0 transitions, 0 flow [2021-06-24 18:22:18,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 29.22222222222222) internal successors, (263), 9 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:18,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-24 18:22:18,545 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork1 was SAFE (5/5) [2021-06-24 18:22:18,545 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-24 18:22:18,549 INFO L202 PluginConnector]: Adding new model bluetooth04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 06:22:18 BasicIcfg [2021-06-24 18:22:18,549 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-24 18:22:18,549 INFO L168 Benchmark]: Toolchain (without parser) took 10093.98 ms. Allocated memory was 192.9 MB in the beginning and 953.2 MB in the end (delta: 760.2 MB). Free memory was 172.9 MB in the beginning and 812.4 MB in the end (delta: -639.5 MB). Peak memory consumption was 438.9 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:18,550 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 192.9 MB. Free memory is still 173.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-24 18:22:18,550 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.63 ms. Allocated memory is still 192.9 MB. Free memory was 172.8 MB in the beginning and 171.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:18,550 INFO L168 Benchmark]: Boogie Preprocessor took 15.39 ms. Allocated memory is still 192.9 MB. Free memory was 171.0 MB in the beginning and 170.1 MB in the end (delta: 848.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:18,550 INFO L168 Benchmark]: RCFGBuilder took 286.80 ms. Allocated memory is still 192.9 MB. Free memory was 170.0 MB in the beginning and 157.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:18,550 INFO L168 Benchmark]: TraceAbstraction took 9739.85 ms. Allocated memory was 192.9 MB in the beginning and 953.2 MB in the end (delta: 760.2 MB). Free memory was 156.7 MB in the beginning and 812.4 MB in the end (delta: -655.7 MB). Peak memory consumption was 423.2 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:18,551 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 192.9 MB. Free memory is still 173.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 32.63 ms. Allocated memory is still 192.9 MB. Free memory was 172.8 MB in the beginning and 171.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.39 ms. Allocated memory is still 192.9 MB. Free memory was 171.0 MB in the beginning and 170.1 MB in the end (delta: 848.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 286.80 ms. Allocated memory is still 192.9 MB. Free memory was 170.0 MB in the beginning and 157.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9739.85 ms. Allocated memory was 192.9 MB in the beginning and 953.2 MB in the end (delta: 760.2 MB). Free memory was 156.7 MB in the beginning and 812.4 MB in the end (delta: -655.7 MB). Peak memory consumption was 423.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 35]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 8 procedures, 53 locations, 10 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 50.5ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 44.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadThread1of1ForFork4 with 1 thread instances CFG has 8 procedures, 53 locations, 10 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 15.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3384.7ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 2637.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 6 SDslu, 20 SDs, 0 SdLazy, 248 SolverSat, 165 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 279.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 144.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1520occurred in iteration=5, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 18.6ms SsaConstructionTime, 84.6ms SatisfiabilityAnalysisTime, 460.2ms InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 397 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadThread1of1ForFork2 with 1 thread instances CFG has 8 procedures, 53 locations, 10 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2311.5ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1949.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 6 SDslu, 20 SDs, 0 SdLazy, 248 SolverSat, 165 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 202.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 107.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1520occurred in iteration=5, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.9ms SsaConstructionTime, 22.7ms SatisfiabilityAnalysisTime, 285.3ms InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 89 ConstructedInterpolants, 0 QuantifiedInterpolants, 361 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadThread1of1ForFork3 with 1 thread instances CFG has 8 procedures, 53 locations, 10 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2017.9ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1716.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 6 SDslu, 20 SDs, 0 SdLazy, 248 SolverSat, 165 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 196.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 136.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1520occurred in iteration=5, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 8.5ms SsaConstructionTime, 18.2ms SatisfiabilityAnalysisTime, 234.0ms InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 93 ConstructedInterpolants, 0 QuantifiedInterpolants, 376 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadThread1of1ForFork1 with 1 thread instances CFG has 8 procedures, 53 locations, 10 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1845.9ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1596.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 6 SDslu, 20 SDs, 0 SdLazy, 248 SolverSat, 165 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 202.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 122.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1520occurred in iteration=5, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.0ms SsaConstructionTime, 7.8ms SatisfiabilityAnalysisTime, 212.4ms InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 86 ConstructedInterpolants, 0 QuantifiedInterpolants, 352 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...