/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/bluetooth03.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 18:22:08,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-24 18:22:08,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-24 18:22:08,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-24 18:22:08,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-24 18:22:08,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-24 18:22:08,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-24 18:22:08,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-24 18:22:08,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-24 18:22:08,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-24 18:22:08,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-24 18:22:08,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-24 18:22:08,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-24 18:22:08,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-24 18:22:08,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-24 18:22:08,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-24 18:22:08,128 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 18:22:08,164 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-24 18:22:08,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-24 18:22:08,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-24 18:22:08,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-24 18:22:08,167 INFO L138 SettingsManager]: * Use SBE=true [2021-06-24 18:22:08,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-24 18:22:08,168 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-24 18:22:08,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-24 18:22:08,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-24 18:22:08,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-24 18:22:08,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-24 18:22:08,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-24 18:22:08,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-24 18:22:08,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-24 18:22:08,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-24 18:22:08,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-24 18:22:08,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-24 18:22:08,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-24 18:22:08,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-24 18:22:08,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-24 18:22:08,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-24 18:22:08,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 18:22:08,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-24 18:22:08,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-24 18:22:08,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-24 18:22:08,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-24 18:22:08,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-24 18:22:08,188 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-24 18:22:08,188 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-24 18:22:08,188 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-24 18:22:08,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-24 18:22:08,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-24 18:22:08,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-24 18:22:08,549 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-24 18:22:08,550 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-24 18:22:08,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth03.bpl [2021-06-24 18:22:08,551 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth03.bpl' [2021-06-24 18:22:08,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-24 18:22:08,586 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-24 18:22:08,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-24 18:22:08,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-24 18:22:08,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-24 18:22:08,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-24 18:22:08,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-24 18:22:08,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-24 18:22:08,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-24 18:22:08,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/1) ... [2021-06-24 18:22:08,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-24 18:22:08,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-24 18:22:08,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-24 18:22:08,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-24 18:22:08,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth03.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 18:22:08,722 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-06-24 18:22:08,722 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-06-24 18:22:08,723 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-06-24 18:22:08,724 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-06-24 18:22:08,724 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-06-24 18:22:08,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-06-24 18:22:08,724 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-24 18:22:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-24 18:22:08,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-24 18:22:08,726 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 18:22:09,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-24 18:22:09,003 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-06-24 18:22:09,004 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-06-24 18:22:09,006 INFO L202 PluginConnector]: Adding new model bluetooth03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:22:09 BoogieIcfgContainer [2021-06-24 18:22:09,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-24 18:22:09,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-24 18:22:09,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-24 18:22:09,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-24 18:22:09,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:22:08" (1/2) ... [2021-06-24 18:22:09,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ed4ca9 and model type bluetooth03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 06:22:09, skipping insertion in model container [2021-06-24 18:22:09,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:22:09" (2/2) ... [2021-06-24 18:22:09,013 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth03.bpl [2021-06-24 18:22:09,036 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-24 18:22:09,037 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-24 18:22:09,037 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-24 18:22:09,101 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-24 18:22:09,124 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-24 18:22:09,161 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:22:09,161 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:22:09,161 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:22:09,161 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:22:09,161 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:22:09,161 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:22:09,162 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:22:09,162 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-24 18:22:09,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 43 places, 33 transitions, 86 flow [2021-06-24 18:22:09,211 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-06-24 18:22:09,212 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 29 events. 3/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 60 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2021-06-24 18:22:09,216 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 33 transitions, 86 flow [2021-06-24 18:22:09,219 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions, 0 flow [2021-06-24 18:22:09,220 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-06-24 18:22:09,220 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,221 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/4) [2021-06-24 18:22:09,224 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:22:09,238 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:22:09,238 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:22:09,238 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:22:09,239 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:22:09,239 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:22:09,239 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:22:09,239 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:22:09,239 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork2======== [2021-06-24 18:22:09,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 43 places, 33 transitions, 86 flow [2021-06-24 18:22:09,257 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-06-24 18:22:09,257 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 29 events. 3/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 60 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2021-06-24 18:22:09,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 33 transitions, 86 flow [2021-06-24 18:22:09,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 29 transitions, 70 flow [2021-06-24 18:22:09,274 INFO L129 PetriNetUnfolder]: 1/21 cut-off events. [2021-06-24 18:22:09,275 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,275 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:09,276 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:09,277 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:09,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1820894160, now seen corresponding path program 1 times [2021-06-24 18:22:09,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:09,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288974686] [2021-06-24 18:22:09,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:09,398 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,399 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,400 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,401 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:09,422 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 18:22:09,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:09,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288974686] [2021-06-24 18:22:09,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288974686] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:09,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:09,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:22:09,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154909622] [2021-06-24 18:22:09,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:09,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:09,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:09,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:09,451 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 33 [2021-06-24 18:22:09,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:09,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 33 [2021-06-24 18:22:09,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:09,582 INFO L129 PetriNetUnfolder]: 68/180 cut-off events. [2021-06-24 18:22:09,582 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:09,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 180 events. 68/180 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 829 event pairs, 21 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 287. Up to 72 conditions per place. [2021-06-24 18:22:09,590 INFO L132 encePairwiseOnDemand]: 25/33 looper letters, 6 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2021-06-24 18:22:09,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 98 flow [2021-06-24 18:22:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:09,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2021-06-24 18:22:09,603 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.898989898989899 [2021-06-24 18:22:09,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2021-06-24 18:22:09,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2021-06-24 18:22:09,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:09,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2021-06-24 18:22:09,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,620 INFO L185 Difference]: Start difference. First operand has 39 places, 29 transitions, 70 flow. Second operand 3 states and 89 transitions. [2021-06-24 18:22:09,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 98 flow [2021-06-24 18:22:09,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-24 18:22:09,631 INFO L241 Difference]: Finished difference. Result has 39 places, 32 transitions, 104 flow [2021-06-24 18:22:09,633 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2021-06-24 18:22:09,633 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2021-06-24 18:22:09,634 INFO L482 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 104 flow [2021-06-24 18:22:09,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,634 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:09,634 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:09,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-24 18:22:09,635 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:09,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:09,636 INFO L82 PathProgramCache]: Analyzing trace with hash -299264878, now seen corresponding path program 1 times [2021-06-24 18:22:09,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:09,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583725423] [2021-06-24 18:22:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:09,676 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,677 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,677 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,683 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,686 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 18:22:09,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:09,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583725423] [2021-06-24 18:22:09,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583725423] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:09,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:09,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:22:09,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846305687] [2021-06-24 18:22:09,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:09,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:09,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:09,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:09,692 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 33 [2021-06-24 18:22:09,694 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,694 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:09,694 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 33 [2021-06-24 18:22:09,694 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:09,775 INFO L129 PetriNetUnfolder]: 84/335 cut-off events. [2021-06-24 18:22:09,775 INFO L130 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2021-06-24 18:22:09,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 335 events. 84/335 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2205 event pairs, 34 based on Foata normal form. 42/354 useless extension candidates. Maximal degree in co-relation 609. Up to 92 conditions per place. [2021-06-24 18:22:09,781 INFO L132 encePairwiseOnDemand]: 29/33 looper letters, 4 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2021-06-24 18:22:09,781 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 114 flow [2021-06-24 18:22:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2021-06-24 18:22:09,785 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9292929292929293 [2021-06-24 18:22:09,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2021-06-24 18:22:09,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2021-06-24 18:22:09,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:09,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2021-06-24 18:22:09,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 18:22:09,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,787 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,787 INFO L185 Difference]: Start difference. First operand has 39 places, 32 transitions, 104 flow. Second operand 3 states and 92 transitions. [2021-06-24 18:22:09,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 114 flow [2021-06-24 18:22:09,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 32 transitions, 104 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:09,792 INFO L241 Difference]: Finished difference. Result has 40 places, 32 transitions, 103 flow [2021-06-24 18:22:09,792 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2021-06-24 18:22:09,793 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2021-06-24 18:22:09,793 INFO L482 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 103 flow [2021-06-24 18:22:09,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,793 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:09,793 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:09,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-24 18:22:09,794 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:09,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:09,794 INFO L82 PathProgramCache]: Analyzing trace with hash -305138226, now seen corresponding path program 2 times [2021-06-24 18:22:09,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:09,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538766323] [2021-06-24 18:22:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:09,820 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,820 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:09,830 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,831 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:09,841 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:09,849 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,850 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:09,854 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:09,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:09,855 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 18:22:09,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:09,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538766323] [2021-06-24 18:22:09,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538766323] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:09,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:09,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:22:09,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500464325] [2021-06-24 18:22:09,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:22:09,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:09,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:22:09,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:22:09,858 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 33 [2021-06-24 18:22:09,858 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:09,858 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:09,859 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 33 [2021-06-24 18:22:09,859 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:09,979 INFO L129 PetriNetUnfolder]: 293/710 cut-off events. [2021-06-24 18:22:09,980 INFO L130 PetriNetUnfolder]: For 44/57 co-relation queries the response was YES. [2021-06-24 18:22:09,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1392 conditions, 710 events. 293/710 cut-off events. For 44/57 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4094 event pairs, 48 based on Foata normal form. 14/617 useless extension candidates. Maximal degree in co-relation 1377. Up to 275 conditions per place. [2021-06-24 18:22:09,992 INFO L132 encePairwiseOnDemand]: 23/33 looper letters, 11 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2021-06-24 18:22:09,992 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 191 flow [2021-06-24 18:22:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:22:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-24 18:22:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2021-06-24 18:22:10,000 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8484848484848485 [2021-06-24 18:22:10,000 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 140 transitions. [2021-06-24 18:22:10,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 140 transitions. [2021-06-24 18:22:10,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:10,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 140 transitions. [2021-06-24 18:22:10,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,004 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,004 INFO L185 Difference]: Start difference. First operand has 40 places, 32 transitions, 103 flow. Second operand 5 states and 140 transitions. [2021-06-24 18:22:10,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 191 flow [2021-06-24 18:22:10,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:10,018 INFO L241 Difference]: Finished difference. Result has 44 places, 43 transitions, 184 flow [2021-06-24 18:22:10,018 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2021-06-24 18:22:10,019 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2021-06-24 18:22:10,019 INFO L482 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 184 flow [2021-06-24 18:22:10,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,019 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:10,019 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:10,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-24 18:22:10,020 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:10,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:10,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1543443646, now seen corresponding path program 1 times [2021-06-24 18:22:10,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:10,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512134965] [2021-06-24 18:22:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:10,078 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,080 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:10,087 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,089 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,147 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,148 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,148 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:10,165 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:10,166 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 18:22:10,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:10,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512134965] [2021-06-24 18:22:10,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512134965] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:10,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:10,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:22:10,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524734781] [2021-06-24 18:22:10,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:22:10,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:10,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:22:10,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:22:10,169 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 33 [2021-06-24 18:22:10,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 184 flow. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:10,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 33 [2021-06-24 18:22:10,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:10,362 INFO L129 PetriNetUnfolder]: 355/797 cut-off events. [2021-06-24 18:22:10,362 INFO L130 PetriNetUnfolder]: For 299/372 co-relation queries the response was YES. [2021-06-24 18:22:10,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2099 conditions, 797 events. 355/797 cut-off events. For 299/372 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4240 event pairs, 61 based on Foata normal form. 39/733 useless extension candidates. Maximal degree in co-relation 2081. Up to 286 conditions per place. [2021-06-24 18:22:10,372 INFO L132 encePairwiseOnDemand]: 23/33 looper letters, 11 selfloop transitions, 37 changer transitions 5/75 dead transitions. [2021-06-24 18:22:10,372 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 453 flow [2021-06-24 18:22:10,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:22:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-24 18:22:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2021-06-24 18:22:10,374 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8636363636363636 [2021-06-24 18:22:10,374 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 171 transitions. [2021-06-24 18:22:10,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 171 transitions. [2021-06-24 18:22:10,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:10,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 171 transitions. [2021-06-24 18:22:10,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 28.5) internal successors, (171), 6 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 18:22:10,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,376 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,377 INFO L185 Difference]: Start difference. First operand has 44 places, 43 transitions, 184 flow. Second operand 6 states and 171 transitions. [2021-06-24 18:22:10,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 453 flow [2021-06-24 18:22:10,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 451 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:10,380 INFO L241 Difference]: Finished difference. Result has 50 places, 67 transitions, 453 flow [2021-06-24 18:22:10,381 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=453, PETRI_PLACES=50, PETRI_TRANSITIONS=67} [2021-06-24 18:22:10,381 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2021-06-24 18:22:10,381 INFO L482 AbstractCegarLoop]: Abstraction has has 50 places, 67 transitions, 453 flow [2021-06-24 18:22:10,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,381 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:10,381 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 18:22:10,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-24 18:22:10,382 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash 2000735168, now seen corresponding path program 1 times [2021-06-24 18:22:10,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:10,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447196819] [2021-06-24 18:22:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:10,435 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:10,445 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,447 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,455 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,456 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,467 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,478 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,479 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,503 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,504 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,505 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,514 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:10,518 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,518 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:10,519 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 18:22:10,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:10,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447196819] [2021-06-24 18:22:10,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447196819] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:10,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:10,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:22:10,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203492944] [2021-06-24 18:22:10,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:22:10,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:10,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:22:10,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:22:10,521 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 33 [2021-06-24 18:22:10,521 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 67 transitions, 453 flow. Second operand has 8 states, 8 states have (on average 24.125) internal successors, (193), 8 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,521 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:10,521 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 33 [2021-06-24 18:22:10,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:10,638 INFO L129 PetriNetUnfolder]: 251/493 cut-off events. [2021-06-24 18:22:10,638 INFO L130 PetriNetUnfolder]: For 991/1150 co-relation queries the response was YES. [2021-06-24 18:22:10,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1989 conditions, 493 events. 251/493 cut-off events. For 991/1150 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2179 event pairs, 26 based on Foata normal form. 74/546 useless extension candidates. Maximal degree in co-relation 1967. Up to 208 conditions per place. [2021-06-24 18:22:10,643 INFO L132 encePairwiseOnDemand]: 23/33 looper letters, 0 selfloop transitions, 0 changer transitions 108/108 dead transitions. [2021-06-24 18:22:10,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 108 transitions, 988 flow [2021-06-24 18:22:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:22:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-24 18:22:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2021-06-24 18:22:10,658 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8311688311688312 [2021-06-24 18:22:10,658 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 192 transitions. [2021-06-24 18:22:10,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 192 transitions. [2021-06-24 18:22:10,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:10,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 192 transitions. [2021-06-24 18:22:10,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 27.428571428571427) internal successors, (192), 7 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,663 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,663 INFO L185 Difference]: Start difference. First operand has 50 places, 67 transitions, 453 flow. Second operand 7 states and 192 transitions. [2021-06-24 18:22:10,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 108 transitions, 988 flow [2021-06-24 18:22:10,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 108 transitions, 952 flow, removed 16 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:10,673 INFO L241 Difference]: Finished difference. Result has 51 places, 0 transitions, 0 flow [2021-06-24 18:22:10,673 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=51, PETRI_TRANSITIONS=0} [2021-06-24 18:22:10,673 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 12 predicate places. [2021-06-24 18:22:10,674 INFO L482 AbstractCegarLoop]: Abstraction has has 51 places, 0 transitions, 0 flow [2021-06-24 18:22:10,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 24.125) internal successors, (193), 8 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-24 18:22:10,674 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork2 was SAFE (2/4) [2021-06-24 18:22:10,675 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:22:10,676 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:22:10,676 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:22:10,676 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:22:10,676 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:22:10,676 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:22:10,677 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:22:10,677 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:22:10,677 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork3======== [2021-06-24 18:22:10,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 43 places, 33 transitions, 86 flow [2021-06-24 18:22:10,687 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-06-24 18:22:10,687 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:10,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 29 events. 3/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 60 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2021-06-24 18:22:10,688 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 33 transitions, 86 flow [2021-06-24 18:22:10,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 29 transitions, 70 flow [2021-06-24 18:22:10,691 INFO L129 PetriNetUnfolder]: 2/26 cut-off events. [2021-06-24 18:22:10,691 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:10,691 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:10,691 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:10,691 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:10,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:10,692 INFO L82 PathProgramCache]: Analyzing trace with hash 613169295, now seen corresponding path program 1 times [2021-06-24 18:22:10,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:10,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384472815] [2021-06-24 18:22:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:10,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:10,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:10,719 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 18:22:10,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:10,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384472815] [2021-06-24 18:22:10,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384472815] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:10,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:10,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:22:10,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736428135] [2021-06-24 18:22:10,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:10,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:10,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:10,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:10,723 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 33 [2021-06-24 18:22:10,724 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:10,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 33 [2021-06-24 18:22:10,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:10,751 INFO L129 PetriNetUnfolder]: 68/180 cut-off events. [2021-06-24 18:22:10,754 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:10,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 180 events. 68/180 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 829 event pairs, 21 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 287. Up to 72 conditions per place. [2021-06-24 18:22:10,756 INFO L132 encePairwiseOnDemand]: 25/33 looper letters, 6 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2021-06-24 18:22:10,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 98 flow [2021-06-24 18:22:10,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2021-06-24 18:22:10,758 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.898989898989899 [2021-06-24 18:22:10,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2021-06-24 18:22:10,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2021-06-24 18:22:10,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:10,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2021-06-24 18:22:10,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,760 INFO L185 Difference]: Start difference. First operand has 39 places, 29 transitions, 70 flow. Second operand 3 states and 89 transitions. [2021-06-24 18:22:10,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 98 flow [2021-06-24 18:22:10,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-24 18:22:10,762 INFO L241 Difference]: Finished difference. Result has 39 places, 32 transitions, 104 flow [2021-06-24 18:22:10,762 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2021-06-24 18:22:10,762 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2021-06-24 18:22:10,762 INFO L482 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 104 flow [2021-06-24 18:22:10,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,762 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:10,763 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:10,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-24 18:22:10,763 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:10,763 INFO L82 PathProgramCache]: Analyzing trace with hash -687251443, now seen corresponding path program 1 times [2021-06-24 18:22:10,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:10,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692398535] [2021-06-24 18:22:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:10,787 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,788 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:10,789 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,789 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:10,792 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,792 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:10,792 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 18:22:10,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:10,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692398535] [2021-06-24 18:22:10,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692398535] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:10,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:10,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:22:10,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695930669] [2021-06-24 18:22:10,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:10,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:10,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:10,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:10,795 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 33 [2021-06-24 18:22:10,795 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,795 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:10,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 33 [2021-06-24 18:22:10,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:10,833 INFO L129 PetriNetUnfolder]: 84/335 cut-off events. [2021-06-24 18:22:10,833 INFO L130 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2021-06-24 18:22:10,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 335 events. 84/335 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2205 event pairs, 34 based on Foata normal form. 42/354 useless extension candidates. Maximal degree in co-relation 609. Up to 92 conditions per place. [2021-06-24 18:22:10,836 INFO L132 encePairwiseOnDemand]: 29/33 looper letters, 4 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2021-06-24 18:22:10,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 114 flow [2021-06-24 18:22:10,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:10,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2021-06-24 18:22:10,838 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9292929292929293 [2021-06-24 18:22:10,838 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2021-06-24 18:22:10,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2021-06-24 18:22:10,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:10,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2021-06-24 18:22:10,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 18:22:10,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,840 INFO L185 Difference]: Start difference. First operand has 39 places, 32 transitions, 104 flow. Second operand 3 states and 92 transitions. [2021-06-24 18:22:10,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 114 flow [2021-06-24 18:22:10,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 32 transitions, 104 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:10,846 INFO L241 Difference]: Finished difference. Result has 40 places, 32 transitions, 103 flow [2021-06-24 18:22:10,847 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2021-06-24 18:22:10,847 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2021-06-24 18:22:10,847 INFO L482 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 103 flow [2021-06-24 18:22:10,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,847 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:10,847 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:10,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-24 18:22:10,848 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:10,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:10,848 INFO L82 PathProgramCache]: Analyzing trace with hash 472292749, now seen corresponding path program 2 times [2021-06-24 18:22:10,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:10,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656879680] [2021-06-24 18:22:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:10,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:10,884 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,885 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,891 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,894 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:10,900 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,901 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:10,904 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:10,905 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:10,906 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 18:22:10,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:10,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656879680] [2021-06-24 18:22:10,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656879680] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:10,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:10,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:22:10,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822181251] [2021-06-24 18:22:10,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:22:10,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:10,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:22:10,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:22:10,929 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 33 [2021-06-24 18:22:10,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:10,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:10,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 33 [2021-06-24 18:22:10,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:11,024 INFO L129 PetriNetUnfolder]: 293/710 cut-off events. [2021-06-24 18:22:11,024 INFO L130 PetriNetUnfolder]: For 44/57 co-relation queries the response was YES. [2021-06-24 18:22:11,027 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1392 conditions, 710 events. 293/710 cut-off events. For 44/57 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4094 event pairs, 48 based on Foata normal form. 14/617 useless extension candidates. Maximal degree in co-relation 1377. Up to 275 conditions per place. [2021-06-24 18:22:11,030 INFO L132 encePairwiseOnDemand]: 23/33 looper letters, 11 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2021-06-24 18:22:11,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 191 flow [2021-06-24 18:22:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:22:11,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-24 18:22:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2021-06-24 18:22:11,036 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8484848484848485 [2021-06-24 18:22:11,036 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 140 transitions. [2021-06-24 18:22:11,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 140 transitions. [2021-06-24 18:22:11,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:11,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 140 transitions. [2021-06-24 18:22:11,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,039 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,039 INFO L185 Difference]: Start difference. First operand has 40 places, 32 transitions, 103 flow. Second operand 5 states and 140 transitions. [2021-06-24 18:22:11,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 191 flow [2021-06-24 18:22:11,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:11,042 INFO L241 Difference]: Finished difference. Result has 44 places, 43 transitions, 184 flow [2021-06-24 18:22:11,042 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2021-06-24 18:22:11,042 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2021-06-24 18:22:11,043 INFO L482 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 184 flow [2021-06-24 18:22:11,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,043 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:11,043 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 18:22:11,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-24 18:22:11,043 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:11,044 INFO L82 PathProgramCache]: Analyzing trace with hash -197701601, now seen corresponding path program 1 times [2021-06-24 18:22:11,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:11,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952117732] [2021-06-24 18:22:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:11,091 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,091 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:11,095 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,102 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,112 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,122 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,122 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,123 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,123 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:11,127 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,128 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:11,128 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 18:22:11,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:11,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952117732] [2021-06-24 18:22:11,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952117732] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:11,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:11,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:22:11,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139990641] [2021-06-24 18:22:11,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:22:11,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:11,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:22:11,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:22:11,131 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 33 [2021-06-24 18:22:11,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 184 flow. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:11,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 33 [2021-06-24 18:22:11,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:11,243 INFO L129 PetriNetUnfolder]: 355/797 cut-off events. [2021-06-24 18:22:11,243 INFO L130 PetriNetUnfolder]: For 299/372 co-relation queries the response was YES. [2021-06-24 18:22:11,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2099 conditions, 797 events. 355/797 cut-off events. For 299/372 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4240 event pairs, 61 based on Foata normal form. 39/733 useless extension candidates. Maximal degree in co-relation 2081. Up to 286 conditions per place. [2021-06-24 18:22:11,251 INFO L132 encePairwiseOnDemand]: 23/33 looper letters, 11 selfloop transitions, 37 changer transitions 5/75 dead transitions. [2021-06-24 18:22:11,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 453 flow [2021-06-24 18:22:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:22:11,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-24 18:22:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2021-06-24 18:22:11,252 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8636363636363636 [2021-06-24 18:22:11,252 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 171 transitions. [2021-06-24 18:22:11,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 171 transitions. [2021-06-24 18:22:11,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:11,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 171 transitions. [2021-06-24 18:22:11,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 28.5) internal successors, (171), 6 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 18:22:11,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,254 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,254 INFO L185 Difference]: Start difference. First operand has 44 places, 43 transitions, 184 flow. Second operand 6 states and 171 transitions. [2021-06-24 18:22:11,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 453 flow [2021-06-24 18:22:11,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 451 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:11,258 INFO L241 Difference]: Finished difference. Result has 50 places, 67 transitions, 453 flow [2021-06-24 18:22:11,258 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=453, PETRI_PLACES=50, PETRI_TRANSITIONS=67} [2021-06-24 18:22:11,258 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2021-06-24 18:22:11,258 INFO L482 AbstractCegarLoop]: Abstraction has has 50 places, 67 transitions, 453 flow [2021-06-24 18:22:11,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,259 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:11,259 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 18:22:11,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-24 18:22:11,259 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2132437251, now seen corresponding path program 1 times [2021-06-24 18:22:11,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:11,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198699813] [2021-06-24 18:22:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:11,299 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,300 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:11,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,311 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,312 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,320 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,337 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,338 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,339 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,339 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,340 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:11,346 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:11,347 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 18:22:11,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:11,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198699813] [2021-06-24 18:22:11,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198699813] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:11,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:11,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:22:11,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128073233] [2021-06-24 18:22:11,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:22:11,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:11,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:22:11,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:22:11,351 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 33 [2021-06-24 18:22:11,353 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 67 transitions, 453 flow. Second operand has 8 states, 8 states have (on average 24.125) internal successors, (193), 8 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:11,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 33 [2021-06-24 18:22:11,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:11,456 INFO L129 PetriNetUnfolder]: 251/493 cut-off events. [2021-06-24 18:22:11,456 INFO L130 PetriNetUnfolder]: For 991/1150 co-relation queries the response was YES. [2021-06-24 18:22:11,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1989 conditions, 493 events. 251/493 cut-off events. For 991/1150 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2179 event pairs, 26 based on Foata normal form. 74/546 useless extension candidates. Maximal degree in co-relation 1967. Up to 208 conditions per place. [2021-06-24 18:22:11,461 INFO L132 encePairwiseOnDemand]: 23/33 looper letters, 0 selfloop transitions, 0 changer transitions 108/108 dead transitions. [2021-06-24 18:22:11,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 108 transitions, 988 flow [2021-06-24 18:22:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:22:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-24 18:22:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2021-06-24 18:22:11,463 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8311688311688312 [2021-06-24 18:22:11,463 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 192 transitions. [2021-06-24 18:22:11,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 192 transitions. [2021-06-24 18:22:11,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:11,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 192 transitions. [2021-06-24 18:22:11,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 27.428571428571427) internal successors, (192), 7 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,465 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,465 INFO L185 Difference]: Start difference. First operand has 50 places, 67 transitions, 453 flow. Second operand 7 states and 192 transitions. [2021-06-24 18:22:11,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 108 transitions, 988 flow [2021-06-24 18:22:11,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 108 transitions, 952 flow, removed 16 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:11,470 INFO L241 Difference]: Finished difference. Result has 51 places, 0 transitions, 0 flow [2021-06-24 18:22:11,471 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=51, PETRI_TRANSITIONS=0} [2021-06-24 18:22:11,471 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 12 predicate places. [2021-06-24 18:22:11,471 INFO L482 AbstractCegarLoop]: Abstraction has has 51 places, 0 transitions, 0 flow [2021-06-24 18:22:11,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 24.125) internal successors, (193), 8 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-24 18:22:11,472 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork3 was SAFE (3/4) [2021-06-24 18:22:11,473 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:22:11,474 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:22:11,474 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:22:11,474 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:22:11,474 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:22:11,474 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:22:11,474 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:22:11,474 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:22:11,474 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork1======== [2021-06-24 18:22:11,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 43 places, 33 transitions, 86 flow [2021-06-24 18:22:11,479 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-06-24 18:22:11,480 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:11,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 29 events. 3/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 60 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2021-06-24 18:22:11,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 33 transitions, 86 flow [2021-06-24 18:22:11,480 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 29 transitions, 70 flow [2021-06-24 18:22:11,481 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-06-24 18:22:11,481 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:11,481 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:11,482 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:11,482 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:11,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:11,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1028569421, now seen corresponding path program 1 times [2021-06-24 18:22:11,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:11,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269422460] [2021-06-24 18:22:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:11,491 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:11,492 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:11,494 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 18:22:11,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:11,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269422460] [2021-06-24 18:22:11,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269422460] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:11,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:11,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:22:11,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476786705] [2021-06-24 18:22:11,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:11,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:11,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:11,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:11,497 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 33 [2021-06-24 18:22:11,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:11,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 33 [2021-06-24 18:22:11,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:11,517 INFO L129 PetriNetUnfolder]: 68/180 cut-off events. [2021-06-24 18:22:11,517 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-24 18:22:11,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 180 events. 68/180 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 829 event pairs, 21 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 287. Up to 72 conditions per place. [2021-06-24 18:22:11,519 INFO L132 encePairwiseOnDemand]: 25/33 looper letters, 6 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2021-06-24 18:22:11,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 98 flow [2021-06-24 18:22:11,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:11,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2021-06-24 18:22:11,520 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.898989898989899 [2021-06-24 18:22:11,520 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2021-06-24 18:22:11,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2021-06-24 18:22:11,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:11,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2021-06-24 18:22:11,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,521 INFO L185 Difference]: Start difference. First operand has 39 places, 29 transitions, 70 flow. Second operand 3 states and 89 transitions. [2021-06-24 18:22:11,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 98 flow [2021-06-24 18:22:11,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-24 18:22:11,522 INFO L241 Difference]: Finished difference. Result has 39 places, 32 transitions, 104 flow [2021-06-24 18:22:11,522 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2021-06-24 18:22:11,522 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2021-06-24 18:22:11,522 INFO L482 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 104 flow [2021-06-24 18:22:11,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,523 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:11,523 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:11,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-24 18:22:11,523 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:11,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:11,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2068555851, now seen corresponding path program 1 times [2021-06-24 18:22:11,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:11,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570917843] [2021-06-24 18:22:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:11,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:11,537 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,538 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:11,540 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:11,540 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 18:22:11,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:11,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570917843] [2021-06-24 18:22:11,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570917843] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:11,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:11,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:22:11,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612775153] [2021-06-24 18:22:11,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:22:11,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:11,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:22:11,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:22:11,544 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 33 [2021-06-24 18:22:11,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:11,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 33 [2021-06-24 18:22:11,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:11,576 INFO L129 PetriNetUnfolder]: 84/335 cut-off events. [2021-06-24 18:22:11,576 INFO L130 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2021-06-24 18:22:11,577 INFO L84 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 335 events. 84/335 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2205 event pairs, 34 based on Foata normal form. 42/354 useless extension candidates. Maximal degree in co-relation 609. Up to 92 conditions per place. [2021-06-24 18:22:11,578 INFO L132 encePairwiseOnDemand]: 29/33 looper letters, 4 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2021-06-24 18:22:11,578 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 114 flow [2021-06-24 18:22:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:22:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-24 18:22:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2021-06-24 18:22:11,579 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9292929292929293 [2021-06-24 18:22:11,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2021-06-24 18:22:11,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2021-06-24 18:22:11,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:11,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2021-06-24 18:22:11,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 18:22:11,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,581 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,581 INFO L185 Difference]: Start difference. First operand has 39 places, 32 transitions, 104 flow. Second operand 3 states and 92 transitions. [2021-06-24 18:22:11,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 114 flow [2021-06-24 18:22:11,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 32 transitions, 104 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:11,582 INFO L241 Difference]: Finished difference. Result has 40 places, 32 transitions, 103 flow [2021-06-24 18:22:11,582 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2021-06-24 18:22:11,582 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2021-06-24 18:22:11,582 INFO L482 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 103 flow [2021-06-24 18:22:11,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,582 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:11,583 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:11,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-24 18:22:11,583 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:11,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:11,583 INFO L82 PathProgramCache]: Analyzing trace with hash 433592779, now seen corresponding path program 2 times [2021-06-24 18:22:11,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:11,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677796187] [2021-06-24 18:22:11,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:11,601 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,601 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:11,606 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,618 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,625 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:11,629 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:11,630 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 18:22:11,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:11,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677796187] [2021-06-24 18:22:11,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677796187] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:11,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:11,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:22:11,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906141292] [2021-06-24 18:22:11,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:22:11,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:11,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:22:11,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:22:11,632 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 33 [2021-06-24 18:22:11,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:11,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 33 [2021-06-24 18:22:11,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:11,716 INFO L129 PetriNetUnfolder]: 293/710 cut-off events. [2021-06-24 18:22:11,716 INFO L130 PetriNetUnfolder]: For 44/57 co-relation queries the response was YES. [2021-06-24 18:22:11,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1392 conditions, 710 events. 293/710 cut-off events. For 44/57 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4094 event pairs, 48 based on Foata normal form. 14/617 useless extension candidates. Maximal degree in co-relation 1377. Up to 275 conditions per place. [2021-06-24 18:22:11,722 INFO L132 encePairwiseOnDemand]: 23/33 looper letters, 11 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2021-06-24 18:22:11,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 191 flow [2021-06-24 18:22:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:22:11,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-24 18:22:11,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2021-06-24 18:22:11,724 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8484848484848485 [2021-06-24 18:22:11,724 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 140 transitions. [2021-06-24 18:22:11,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 140 transitions. [2021-06-24 18:22:11,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:11,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 140 transitions. [2021-06-24 18:22:11,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,725 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,725 INFO L185 Difference]: Start difference. First operand has 40 places, 32 transitions, 103 flow. Second operand 5 states and 140 transitions. [2021-06-24 18:22:11,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 191 flow [2021-06-24 18:22:11,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:11,727 INFO L241 Difference]: Finished difference. Result has 44 places, 43 transitions, 184 flow [2021-06-24 18:22:11,728 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2021-06-24 18:22:11,728 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2021-06-24 18:22:11,728 INFO L482 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 184 flow [2021-06-24 18:22:11,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,728 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:11,728 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:22:11,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-24 18:22:11,729 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash -773404762, now seen corresponding path program 1 times [2021-06-24 18:22:11,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:11,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477294498] [2021-06-24 18:22:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:11,753 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,753 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:11,756 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [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 18:22:11,776 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,776 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,784 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,785 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,786 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:11,790 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,790 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:11,791 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 18:22:11,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:11,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477294498] [2021-06-24 18:22:11,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477294498] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:11,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:11,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:22:11,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966423357] [2021-06-24 18:22:11,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:22:11,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:11,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:22:11,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:22:11,792 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 33 [2021-06-24 18:22:11,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 184 flow. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:11,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 33 [2021-06-24 18:22:11,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:11,894 INFO L129 PetriNetUnfolder]: 355/797 cut-off events. [2021-06-24 18:22:11,894 INFO L130 PetriNetUnfolder]: For 299/372 co-relation queries the response was YES. [2021-06-24 18:22:11,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2099 conditions, 797 events. 355/797 cut-off events. For 299/372 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4240 event pairs, 61 based on Foata normal form. 39/733 useless extension candidates. Maximal degree in co-relation 2081. Up to 286 conditions per place. [2021-06-24 18:22:11,902 INFO L132 encePairwiseOnDemand]: 23/33 looper letters, 11 selfloop transitions, 37 changer transitions 5/75 dead transitions. [2021-06-24 18:22:11,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 453 flow [2021-06-24 18:22:11,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:22:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-24 18:22:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2021-06-24 18:22:11,903 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8636363636363636 [2021-06-24 18:22:11,903 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 171 transitions. [2021-06-24 18:22:11,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 171 transitions. [2021-06-24 18:22:11,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:11,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 171 transitions. [2021-06-24 18:22:11,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 28.5) internal successors, (171), 6 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 18:22:11,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,905 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,905 INFO L185 Difference]: Start difference. First operand has 44 places, 43 transitions, 184 flow. Second operand 6 states and 171 transitions. [2021-06-24 18:22:11,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 453 flow [2021-06-24 18:22:11,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 451 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-24 18:22:11,908 INFO L241 Difference]: Finished difference. Result has 50 places, 67 transitions, 453 flow [2021-06-24 18:22:11,908 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=453, PETRI_PLACES=50, PETRI_TRANSITIONS=67} [2021-06-24 18:22:11,908 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2021-06-24 18:22:11,908 INFO L482 AbstractCegarLoop]: Abstraction has has 50 places, 67 transitions, 453 flow [2021-06-24 18:22:11,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,908 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-24 18:22:11,909 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 18:22:11,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-24 18:22:11,909 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:22:11,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:22:11,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1372718940, now seen corresponding path program 1 times [2021-06-24 18:22:11,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:22:11,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63780603] [2021-06-24 18:22:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:22:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:22:11,936 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,937 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:22:11,940 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,940 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,948 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,953 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,959 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,967 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,967 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,975 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,978 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:22:11,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:22:11,983 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:22:11,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:22:11,984 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 18:22:11,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:22:11,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63780603] [2021-06-24 18:22:11,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63780603] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:22:11,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:22:11,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:22:11,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409513535] [2021-06-24 18:22:11,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:22:11,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:22:11,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:22:11,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:22:11,986 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 33 [2021-06-24 18:22:11,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 67 transitions, 453 flow. Second operand has 8 states, 8 states have (on average 24.125) internal successors, (193), 8 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:11,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-24 18:22:11,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 33 [2021-06-24 18:22:11,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-24 18:22:12,087 INFO L129 PetriNetUnfolder]: 251/493 cut-off events. [2021-06-24 18:22:12,087 INFO L130 PetriNetUnfolder]: For 991/1150 co-relation queries the response was YES. [2021-06-24 18:22:12,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1989 conditions, 493 events. 251/493 cut-off events. For 991/1150 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2179 event pairs, 26 based on Foata normal form. 74/546 useless extension candidates. Maximal degree in co-relation 1967. Up to 208 conditions per place. [2021-06-24 18:22:12,092 INFO L132 encePairwiseOnDemand]: 23/33 looper letters, 0 selfloop transitions, 0 changer transitions 108/108 dead transitions. [2021-06-24 18:22:12,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 108 transitions, 988 flow [2021-06-24 18:22:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:22:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-24 18:22:12,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2021-06-24 18:22:12,093 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8311688311688312 [2021-06-24 18:22:12,094 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 192 transitions. [2021-06-24 18:22:12,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 192 transitions. [2021-06-24 18:22:12,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-24 18:22:12,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 192 transitions. [2021-06-24 18:22:12,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 27.428571428571427) internal successors, (192), 7 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,096 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,096 INFO L185 Difference]: Start difference. First operand has 50 places, 67 transitions, 453 flow. Second operand 7 states and 192 transitions. [2021-06-24 18:22:12,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 108 transitions, 988 flow [2021-06-24 18:22:12,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 108 transitions, 952 flow, removed 16 selfloop flow, removed 2 redundant places. [2021-06-24 18:22:12,101 INFO L241 Difference]: Finished difference. Result has 51 places, 0 transitions, 0 flow [2021-06-24 18:22:12,101 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=51, PETRI_TRANSITIONS=0} [2021-06-24 18:22:12,102 INFO L335 CegarLoopForPetriNet]: 39 programPoint places, 12 predicate places. [2021-06-24 18:22:12,102 INFO L482 AbstractCegarLoop]: Abstraction has has 51 places, 0 transitions, 0 flow [2021-06-24 18:22:12,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 24.125) internal successors, (193), 8 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:22:12,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-24 18:22:12,102 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork1 was SAFE (4/4) [2021-06-24 18:22:12,102 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-24 18:22:12,107 INFO L202 PluginConnector]: Adding new model bluetooth03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 06:22:12 BasicIcfg [2021-06-24 18:22:12,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-24 18:22:12,108 INFO L168 Benchmark]: Toolchain (without parser) took 3521.50 ms. Allocated memory was 191.9 MB in the beginning and 239.1 MB in the end (delta: 47.2 MB). Free memory was 171.9 MB in the beginning and 95.6 MB in the end (delta: 76.3 MB). Peak memory consumption was 124.0 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:12,109 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 191.9 MB. Free memory is still 173.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-24 18:22:12,109 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.53 ms. Allocated memory is still 191.9 MB. Free memory was 171.8 MB in the beginning and 170.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:12,110 INFO L168 Benchmark]: Boogie Preprocessor took 17.84 ms. Allocated memory is still 191.9 MB. Free memory was 170.0 MB in the beginning and 169.2 MB in the end (delta: 842.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:12,111 INFO L168 Benchmark]: RCFGBuilder took 362.45 ms. Allocated memory is still 191.9 MB. Free memory was 169.1 MB in the beginning and 156.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:12,111 INFO L168 Benchmark]: TraceAbstraction took 3099.68 ms. Allocated memory was 191.9 MB in the beginning and 239.1 MB in the end (delta: 47.2 MB). Free memory was 155.9 MB in the beginning and 95.6 MB in the end (delta: 60.3 MB). Peak memory consumption was 108.3 MB. Max. memory is 8.0 GB. [2021-06-24 18:22:12,112 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 0.13 ms. Allocated memory is still 191.9 MB. Free memory is still 173.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.53 ms. Allocated memory is still 191.9 MB. Free memory was 171.8 MB in the beginning and 170.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.84 ms. Allocated memory is still 191.9 MB. Free memory was 170.0 MB in the beginning and 169.2 MB in the end (delta: 842.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 362.45 ms. Allocated memory is still 191.9 MB. Free memory was 169.1 MB in the beginning and 156.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3099.68 ms. Allocated memory was 191.9 MB in the beginning and 239.1 MB in the end (delta: 47.2 MB). Free memory was 155.9 MB in the beginning and 95.6 MB in the end (delta: 60.3 MB). Peak memory consumption was 108.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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 7 procedures, 46 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 64.0ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 57.7ms, 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: DeviceThreadThread1of1ForFork2 with 1 thread instances CFG has 7 procedures, 46 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 10.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1444.1ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 820.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19 SDtfs, 6 SDslu, 12 SDs, 0 SdLazy, 137 SolverSat, 82 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 154.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 154.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=453occurred in iteration=4, InterpolantAutomatonStates: 24, 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: 14.4ms SsaConstructionTime, 49.3ms SatisfiabilityAnalysisTime, 397.7ms InterpolantComputationTime, 71 NumberOfCodeBlocks, 71 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 243 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 7 procedures, 46 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 795.7ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 455.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19 SDtfs, 6 SDslu, 12 SDs, 0 SdLazy, 137 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 105.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 75.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=453occurred in iteration=4, InterpolantAutomatonStates: 24, 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: 7.4ms SsaConstructionTime, 47.6ms SatisfiabilityAnalysisTime, 216.0ms InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 70 ConstructedInterpolants, 0 QuantifiedInterpolants, 258 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 7 procedures, 46 locations, 8 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: 628.6ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 393.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19 SDtfs, 6 SDslu, 12 SDs, 0 SdLazy, 137 SolverSat, 82 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 97.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=453occurred in iteration=4, InterpolantAutomatonStates: 24, 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: 3.8ms SsaConstructionTime, 22.3ms SatisfiabilityAnalysisTime, 173.9ms InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 234 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...