/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -i ../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-abd8500 [2020-01-16 21:18:24,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-01-16 21:18:24,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-01-16 21:18:24,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-01-16 21:18:24,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-01-16 21:18:24,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-01-16 21:18:24,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-01-16 21:18:24,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-01-16 21:18:24,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-01-16 21:18:24,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-01-16 21:18:24,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-01-16 21:18:24,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-01-16 21:18:24,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-01-16 21:18:24,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-01-16 21:18:24,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-01-16 21:18:24,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-01-16 21:18:24,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-01-16 21:18:24,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-01-16 21:18:24,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-01-16 21:18:24,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-01-16 21:18:24,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-01-16 21:18:24,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-01-16 21:18:24,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-01-16 21:18:24,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-01-16 21:18:24,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-01-16 21:18:24,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-01-16 21:18:24,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-01-16 21:18:24,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-01-16 21:18:24,105 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-SemanticLbe.epf [2020-01-16 21:18:24,136 INFO L113 SettingsManager]: Loading preferences was successful [2020-01-16 21:18:24,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-01-16 21:18:24,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-01-16 21:18:24,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-01-16 21:18:24,140 INFO L138 SettingsManager]: * Use SBE=true [2020-01-16 21:18:24,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-01-16 21:18:24,141 INFO L138 SettingsManager]: * sizeof long=4 [2020-01-16 21:18:24,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-01-16 21:18:24,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-01-16 21:18:24,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-01-16 21:18:24,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-01-16 21:18:24,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-01-16 21:18:24,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-01-16 21:18:24,144 INFO L138 SettingsManager]: * sizeof long double=12 [2020-01-16 21:18:24,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-01-16 21:18:24,145 INFO L138 SettingsManager]: * Use constant arrays=true [2020-01-16 21:18:24,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-01-16 21:18:24,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-01-16 21:18:24,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-01-16 21:18:24,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-01-16 21:18:24,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-01-16 21:18:24,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-01-16 21:18:24,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-01-16 21:18:24,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-01-16 21:18:24,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-01-16 21:18:24,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-01-16 21:18:24,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-01-16 21:18:24,148 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-01-16 21:18:24,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-01-16 21:18:24,443 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-01-16 21:18:24,462 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-01-16 21:18:24,468 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-01-16 21:18:24,469 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-01-16 21:18:24,470 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-01-16 21:18:24,471 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl [2020-01-16 21:18:24,471 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl' [2020-01-16 21:18:24,509 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-01-16 21:18:24,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-01-16 21:18:24,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-01-16 21:18:24,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-01-16 21:18:24,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-01-16 21:18:24,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:18:24" (1/1) ... [2020-01-16 21:18:24,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:18:24" (1/1) ... [2020-01-16 21:18:24,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-01-16 21:18:24,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-01-16 21:18:24,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-01-16 21:18:24,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-01-16 21:18:24,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:18:24" (1/1) ... [2020-01-16 21:18:24,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:18:24" (1/1) ... [2020-01-16 21:18:24,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:18:24" (1/1) ... [2020-01-16 21:18:24,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:18:24" (1/1) ... [2020-01-16 21:18:24,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:18:24" (1/1) ... [2020-01-16 21:18:24,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:18:24" (1/1) ... [2020-01-16 21:18:24,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:18:24" (1/1) ... [2020-01-16 21:18:24,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-01-16 21:18:24,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-01-16 21:18:24,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-01-16 21:18:24,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-01-16 21:18:24,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:18:24" (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 [2020-01-16 21:18:24,655 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-01-16 21:18:24,655 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-01-16 21:18:24,655 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-01-16 21:18:24,657 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2020-01-16 21:18:24,657 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2020-01-16 21:18:24,657 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2020-01-16 21:18:24,657 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-01-16 21:18:24,658 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-01-16 21:18:24,658 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-01-16 21:18:24,658 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-01-16 21:18:24,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-01-16 21:18:24,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-01-16 21:18:24,659 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-01-16 21:18:24,820 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-01-16 21:18:24,821 INFO L287 CfgBuilder]: Removed 0 assume(true) statements. [2020-01-16 21:18:24,822 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.01 09:18:24 BoogieIcfgContainer [2020-01-16 21:18:24,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-01-16 21:18:24,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-01-16 21:18:24,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-01-16 21:18:24,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-01-16 21:18:24,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:18:24" (1/2) ... [2020-01-16 21:18:24,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@506859e7 and model type example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.01 09:18:24, skipping insertion in model container [2020-01-16 21:18:24,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.01 09:18:24" (2/2) ... [2020-01-16 21:18:24,830 INFO L109 eAbstractionObserver]: Analyzing ICFG example_3.bpl [2020-01-16 21:18:24,840 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-01-16 21:18:24,847 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-01-16 21:18:24,848 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-01-16 21:18:24,919 INFO L250 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-01-16 21:18:24,942 INFO L374 AbstractCegarLoop]: Interprodecural is true [2020-01-16 21:18:24,942 INFO L375 AbstractCegarLoop]: Hoare is false [2020-01-16 21:18:24,942 INFO L376 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-01-16 21:18:24,942 INFO L377 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-01-16 21:18:24,943 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-01-16 21:18:24,943 INFO L379 AbstractCegarLoop]: Difference is false [2020-01-16 21:18:24,943 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-01-16 21:18:24,943 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-01-16 21:18:24,968 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 24 transitions [2020-01-16 21:18:24,971 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions [2020-01-16 21:18:25,030 INFO L129 PetriNetUnfolder]: 5/24 cut-off events. [2020-01-16 21:18:25,031 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 21:18:25,037 INFO L76 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 24 events. 5/24 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2020-01-16 21:18:25,039 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions [2020-01-16 21:18:25,051 INFO L129 PetriNetUnfolder]: 5/24 cut-off events. [2020-01-16 21:18:25,052 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 21:18:25,053 INFO L76 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 24 events. 5/24 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2020-01-16 21:18:25,054 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 84 [2020-01-16 21:18:25,055 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-01-16 21:18:25,141 INFO L206 etLargeBlockEncoding]: Checked pairs total: 27 [2020-01-16 21:18:25,142 INFO L214 etLargeBlockEncoding]: Total number of compositions: 4 [2020-01-16 21:18:25,142 INFO L162 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 186 [2020-01-16 21:18:25,154 INFO L129 PetriNetUnfolder]: 5/18 cut-off events. [2020-01-16 21:18:25,154 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 21:18:25,155 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:18:25,156 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:18:25,156 INFO L426 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:18:25,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:18:25,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1034130075, now seen corresponding path program 1 times [2020-01-16 21:18:25,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:18:25,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934947793] [2020-01-16 21:18:25,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:18:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:18:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-01-16 21:18:25,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934947793] [2020-01-16 21:18:25,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:18:25,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 21:18:25,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704882594] [2020-01-16 21:18:25,339 INFO L458 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-01-16 21:18:25,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:18:25,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-01-16 21:18:25,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-01-16 21:18:25,359 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 28 [2020-01-16 21:18:25,361 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions. Second operand 3 states. [2020-01-16 21:18:25,361 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:18:25,361 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 28 [2020-01-16 21:18:25,363 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:18:25,388 INFO L129 PetriNetUnfolder]: 3/17 cut-off events. [2020-01-16 21:18:25,389 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-01-16 21:18:25,389 INFO L76 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 17 events. 3/17 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs. 1/17 useless extension candidates. Maximal degree in co-relation 15. Up to 4 conditions per place. [2020-01-16 21:18:25,390 INFO L123 encePairwiseOnDemand]: 26/28 looper letters, 2 selfloop transitions, 2 changer transitions [2020-01-16 21:18:25,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-01-16 21:18:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-01-16 21:18:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2020-01-16 21:18:25,415 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2020-01-16 21:18:25,416 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2020-01-16 21:18:25,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2020-01-16 21:18:25,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:18:25,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2020-01-16 21:18:25,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-01-16 21:18:25,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-01-16 21:18:25,434 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-01-16 21:18:25,436 INFO L174 Difference]: Start difference. First operand has 23 places, 20 transitions. Second operand 3 states and 76 transitions. [2020-01-16 21:18:25,436 INFO L199 Difference]: Finished difference. Result has 25 places, 16 transitions [2020-01-16 21:18:25,439 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2020-01-16 21:18:25,441 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 25 places, 16 transitions [2020-01-16 21:18:25,441 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 25 places, 16 transitions [2020-01-16 21:18:25,448 INFO L129 PetriNetUnfolder]: 3/17 cut-off events. [2020-01-16 21:18:25,448 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-01-16 21:18:25,449 INFO L76 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 17 events. 3/17 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs. 0/16 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2020-01-16 21:18:25,451 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 4 of 25 places, 0 of 16 transitions, 1 of 66 flow. [2020-01-16 21:18:25,452 INFO L478 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions [2020-01-16 21:18:25,452 INFO L479 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-01-16 21:18:25,459 INFO L129 PetriNetUnfolder]: 3/15 cut-off events. [2020-01-16 21:18:25,459 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-01-16 21:18:25,459 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:18:25,459 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:18:25,460 INFO L426 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:18:25,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:18:25,460 INFO L82 PathProgramCache]: Analyzing trace with hash 949620875, now seen corresponding path program 1 times [2020-01-16 21:18:25,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:18:25,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982336754] [2020-01-16 21:18:25,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:18:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:18:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-01-16 21:18:25,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982336754] [2020-01-16 21:18:25,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:18:25,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 21:18:25,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040421317] [2020-01-16 21:18:25,491 INFO L458 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-01-16 21:18:25,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:18:25,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-01-16 21:18:25,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-01-16 21:18:25,494 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 28 [2020-01-16 21:18:25,494 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions. Second operand 3 states. [2020-01-16 21:18:25,494 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:18:25,494 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 28 [2020-01-16 21:18:25,494 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:18:25,506 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2020-01-16 21:18:25,506 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2020-01-16 21:18:25,507 INFO L76 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 11 events. 0/11 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs. 2/12 useless extension candidates. Maximal degree in co-relation 10. Up to 2 conditions per place. [2020-01-16 21:18:25,507 INFO L123 encePairwiseOnDemand]: 25/28 looper letters, 1 selfloop transitions, 3 changer transitions [2020-01-16 21:18:25,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-01-16 21:18:25,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-01-16 21:18:25,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2020-01-16 21:18:25,509 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2020-01-16 21:18:25,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2020-01-16 21:18:25,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2020-01-16 21:18:25,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:18:25,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2020-01-16 21:18:25,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-01-16 21:18:25,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-01-16 21:18:25,517 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-01-16 21:18:25,518 INFO L174 Difference]: Start difference. First operand has 21 places, 16 transitions. Second operand 3 states and 76 transitions. [2020-01-16 21:18:25,518 INFO L199 Difference]: Finished difference. Result has 23 places, 11 transitions [2020-01-16 21:18:25,518 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=23, PETRI_TRANSITIONS=11} [2020-01-16 21:18:25,520 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 23 places, 11 transitions [2020-01-16 21:18:25,520 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 23 places, 11 transitions [2020-01-16 21:18:25,525 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2020-01-16 21:18:25,526 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-01-16 21:18:25,526 INFO L76 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 11 events. 0/11 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 6 event pairs. 0/10 useless extension candidates. Maximal degree in co-relation 10. Up to 2 conditions per place. [2020-01-16 21:18:25,528 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 1 of 23 places, 0 of 11 transitions, 1 of 42 flow. [2020-01-16 21:18:25,529 INFO L478 AbstractCegarLoop]: Abstraction has has 22 places, 11 transitions [2020-01-16 21:18:25,529 INFO L479 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-01-16 21:18:25,533 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2020-01-16 21:18:25,533 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-01-16 21:18:25,533 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:18:25,534 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:18:25,534 INFO L426 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:18:25,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:18:25,534 INFO L82 PathProgramCache]: Analyzing trace with hash 949821755, now seen corresponding path program 1 times [2020-01-16 21:18:25,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:18:25,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758967262] [2020-01-16 21:18:25,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:18:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:18:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-01-16 21:18:25,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758967262] [2020-01-16 21:18:25,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:18:25,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-01-16 21:18:25,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952470795] [2020-01-16 21:18:25,677 INFO L458 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-01-16 21:18:25,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:18:25,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-01-16 21:18:25,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-01-16 21:18:25,679 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2020-01-16 21:18:25,680 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 11 transitions. Second operand 5 states. [2020-01-16 21:18:25,680 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:18:25,680 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2020-01-16 21:18:25,680 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:18:25,861 INFO L129 PetriNetUnfolder]: 5/31 cut-off events. [2020-01-16 21:18:25,861 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 21:18:25,862 INFO L76 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 31 events. 5/31 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 66 event pairs. 0/26 useless extension candidates. Maximal degree in co-relation 40. Up to 7 conditions per place. [2020-01-16 21:18:25,862 INFO L123 encePairwiseOnDemand]: 23/28 looper letters, 6 selfloop transitions, 6 changer transitions [2020-01-16 21:18:25,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-01-16 21:18:25,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-01-16 21:18:25,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2020-01-16 21:18:25,865 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.7642857142857142 [2020-01-16 21:18:25,865 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 107 transitions. [2020-01-16 21:18:25,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 107 transitions. [2020-01-16 21:18:25,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:18:25,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 107 transitions. [2020-01-16 21:18:25,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-01-16 21:18:25,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-01-16 21:18:25,868 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-01-16 21:18:25,868 INFO L174 Difference]: Start difference. First operand has 22 places, 11 transitions. Second operand 5 states and 107 transitions. [2020-01-16 21:18:25,870 INFO L199 Difference]: Finished difference. Result has 29 places, 15 transitions [2020-01-16 21:18:25,870 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=29, PETRI_TRANSITIONS=15} [2020-01-16 21:18:25,870 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 29 places, 15 transitions [2020-01-16 21:18:25,871 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 29 places, 15 transitions [2020-01-16 21:18:25,878 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2020-01-16 21:18:25,879 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2020-01-16 21:18:25,879 INFO L76 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 24 events. 2/24 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 46 event pairs. 0/22 useless extension candidates. Maximal degree in co-relation 37. Up to 5 conditions per place. [2020-01-16 21:18:25,880 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 0 of 29 places, 0 of 15 transitions, 0 of 74 flow. [2020-01-16 21:18:25,880 INFO L478 AbstractCegarLoop]: Abstraction has has 29 places, 15 transitions [2020-01-16 21:18:25,880 INFO L479 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-01-16 21:18:25,887 INFO L129 PetriNetUnfolder]: 2/22 cut-off events. [2020-01-16 21:18:25,887 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2020-01-16 21:18:25,887 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:18:25,887 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:18:25,888 INFO L426 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:18:25,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:18:25,888 INFO L82 PathProgramCache]: Analyzing trace with hash 958681169, now seen corresponding path program 2 times [2020-01-16 21:18:25,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:18:25,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675862426] [2020-01-16 21:18:25,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:18:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:18:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-01-16 21:18:26,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675862426] [2020-01-16 21:18:26,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:18:26,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-01-16 21:18:26,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505413157] [2020-01-16 21:18:26,051 INFO L458 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-01-16 21:18:26,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:18:26,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-01-16 21:18:26,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-01-16 21:18:26,055 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2020-01-16 21:18:26,055 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 15 transitions. Second operand 5 states. [2020-01-16 21:18:26,056 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:18:26,056 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2020-01-16 21:18:26,056 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:18:26,140 INFO L129 PetriNetUnfolder]: 5/36 cut-off events. [2020-01-16 21:18:26,144 INFO L130 PetriNetUnfolder]: For 50/53 co-relation queries the response was YES. [2020-01-16 21:18:26,145 INFO L76 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 36 events. 5/36 cut-off events. For 50/53 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 107 event pairs. 1/35 useless extension candidates. Maximal degree in co-relation 72. Up to 8 conditions per place. [2020-01-16 21:18:26,145 INFO L123 encePairwiseOnDemand]: 23/28 looper letters, 7 selfloop transitions, 9 changer transitions [2020-01-16 21:18:26,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-01-16 21:18:26,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-01-16 21:18:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2020-01-16 21:18:26,151 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.7642857142857142 [2020-01-16 21:18:26,152 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 107 transitions. [2020-01-16 21:18:26,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 107 transitions. [2020-01-16 21:18:26,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:18:26,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 107 transitions. [2020-01-16 21:18:26,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-01-16 21:18:26,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-01-16 21:18:26,162 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-01-16 21:18:26,162 INFO L174 Difference]: Start difference. First operand has 29 places, 15 transitions. Second operand 5 states and 107 transitions. [2020-01-16 21:18:26,163 INFO L199 Difference]: Finished difference. Result has 36 places, 19 transitions [2020-01-16 21:18:26,163 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=134, PETRI_PLACES=36, PETRI_TRANSITIONS=19} [2020-01-16 21:18:26,163 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 36 places, 19 transitions [2020-01-16 21:18:26,164 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 36 places, 19 transitions [2020-01-16 21:18:26,181 INFO L129 PetriNetUnfolder]: 3/31 cut-off events. [2020-01-16 21:18:26,182 INFO L130 PetriNetUnfolder]: For 63/65 co-relation queries the response was YES. [2020-01-16 21:18:26,182 INFO L76 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 31 events. 3/31 cut-off events. For 63/65 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 88 event pairs. 0/30 useless extension candidates. Maximal degree in co-relation 63. Up to 8 conditions per place. [2020-01-16 21:18:26,183 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 1 of 36 places, 0 of 19 transitions, 4 of 134 flow. [2020-01-16 21:18:26,183 INFO L478 AbstractCegarLoop]: Abstraction has has 35 places, 19 transitions [2020-01-16 21:18:26,183 INFO L479 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-01-16 21:18:26,198 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2020-01-16 21:18:26,199 INFO L130 PetriNetUnfolder]: For 63/65 co-relation queries the response was YES. [2020-01-16 21:18:26,199 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:18:26,199 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:18:26,199 INFO L426 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:18:26,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:18:26,200 INFO L82 PathProgramCache]: Analyzing trace with hash 988252145, now seen corresponding path program 3 times [2020-01-16 21:18:26,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:18:26,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24164619] [2020-01-16 21:18:26,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:18:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:18:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-01-16 21:18:26,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24164619] [2020-01-16 21:18:26,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:18:26,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-01-16 21:18:26,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995750109] [2020-01-16 21:18:26,337 INFO L458 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-01-16 21:18:26,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:18:26,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-01-16 21:18:26,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-01-16 21:18:26,339 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2020-01-16 21:18:26,339 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 19 transitions. Second operand 5 states. [2020-01-16 21:18:26,339 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:18:26,339 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2020-01-16 21:18:26,340 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:18:26,392 INFO L129 PetriNetUnfolder]: 5/44 cut-off events. [2020-01-16 21:18:26,393 INFO L130 PetriNetUnfolder]: For 152/157 co-relation queries the response was YES. [2020-01-16 21:18:26,394 INFO L76 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 44 events. 5/44 cut-off events. For 152/157 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 157 event pairs. 1/42 useless extension candidates. Maximal degree in co-relation 104. Up to 10 conditions per place. [2020-01-16 21:18:26,394 INFO L123 encePairwiseOnDemand]: 23/28 looper letters, 8 selfloop transitions, 11 changer transitions [2020-01-16 21:18:26,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-01-16 21:18:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-01-16 21:18:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2020-01-16 21:18:26,396 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.7642857142857142 [2020-01-16 21:18:26,396 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 107 transitions. [2020-01-16 21:18:26,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 107 transitions. [2020-01-16 21:18:26,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:18:26,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 107 transitions. [2020-01-16 21:18:26,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-01-16 21:18:26,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-01-16 21:18:26,399 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-01-16 21:18:26,399 INFO L174 Difference]: Start difference. First operand has 35 places, 19 transitions. Second operand 5 states and 107 transitions. [2020-01-16 21:18:26,400 INFO L199 Difference]: Finished difference. Result has 42 places, 23 transitions [2020-01-16 21:18:26,400 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=209, PETRI_PLACES=42, PETRI_TRANSITIONS=23} [2020-01-16 21:18:26,400 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 42 places, 23 transitions [2020-01-16 21:18:26,400 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 42 places, 23 transitions [2020-01-16 21:18:26,410 INFO L129 PetriNetUnfolder]: 5/44 cut-off events. [2020-01-16 21:18:26,410 INFO L130 PetriNetUnfolder]: For 208/209 co-relation queries the response was YES. [2020-01-16 21:18:26,411 INFO L76 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 44 events. 5/44 cut-off events. For 208/209 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 161 event pairs. 0/42 useless extension candidates. Maximal degree in co-relation 105. Up to 10 conditions per place. [2020-01-16 21:18:26,412 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 1 of 42 places, 0 of 23 transitions, 6 of 209 flow. [2020-01-16 21:18:26,412 INFO L478 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions [2020-01-16 21:18:26,412 INFO L479 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-01-16 21:18:26,420 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2020-01-16 21:18:26,421 INFO L130 PetriNetUnfolder]: For 208/209 co-relation queries the response was YES. [2020-01-16 21:18:26,421 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:18:26,421 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:18:26,421 INFO L426 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:18:26,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:18:26,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1819421045, now seen corresponding path program 4 times [2020-01-16 21:18:26,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:18:26,422 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657594357] [2020-01-16 21:18:26,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:18:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:18:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-01-16 21:18:26,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657594357] [2020-01-16 21:18:26,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:18:26,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-01-16 21:18:26,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263575364] [2020-01-16 21:18:26,519 INFO L458 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-01-16 21:18:26,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:18:26,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-01-16 21:18:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-01-16 21:18:26,520 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2020-01-16 21:18:26,521 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions. Second operand 5 states. [2020-01-16 21:18:26,521 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:18:26,521 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2020-01-16 21:18:26,521 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:18:26,581 INFO L129 PetriNetUnfolder]: 5/43 cut-off events. [2020-01-16 21:18:26,581 INFO L130 PetriNetUnfolder]: For 281/289 co-relation queries the response was YES. [2020-01-16 21:18:26,582 INFO L76 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 43 events. 5/43 cut-off events. For 281/289 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 151 event pairs. 1/43 useless extension candidates. Maximal degree in co-relation 118. Up to 10 conditions per place. [2020-01-16 21:18:26,582 INFO L123 encePairwiseOnDemand]: 23/28 looper letters, 8 selfloop transitions, 14 changer transitions [2020-01-16 21:18:26,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-01-16 21:18:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-01-16 21:18:26,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2020-01-16 21:18:26,585 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.7642857142857142 [2020-01-16 21:18:26,585 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 107 transitions. [2020-01-16 21:18:26,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 107 transitions. [2020-01-16 21:18:26,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:18:26,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 107 transitions. [2020-01-16 21:18:26,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-01-16 21:18:26,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-01-16 21:18:26,588 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-01-16 21:18:26,588 INFO L174 Difference]: Start difference. First operand has 41 places, 23 transitions. Second operand 5 states and 107 transitions. [2020-01-16 21:18:26,589 INFO L199 Difference]: Finished difference. Result has 48 places, 25 transitions [2020-01-16 21:18:26,589 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=48, PETRI_TRANSITIONS=25} [2020-01-16 21:18:26,590 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 48 places, 25 transitions [2020-01-16 21:18:26,590 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 48 places, 25 transitions [2020-01-16 21:18:26,600 INFO L129 PetriNetUnfolder]: 5/43 cut-off events. [2020-01-16 21:18:26,601 INFO L130 PetriNetUnfolder]: For 358/362 co-relation queries the response was YES. [2020-01-16 21:18:26,602 INFO L76 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 43 events. 5/43 cut-off events. For 358/362 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 156 event pairs. 0/42 useless extension candidates. Maximal degree in co-relation 118. Up to 10 conditions per place. [2020-01-16 21:18:26,602 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 1 of 48 places, 0 of 25 transitions, 6 of 277 flow. [2020-01-16 21:18:26,603 INFO L478 AbstractCegarLoop]: Abstraction has has 47 places, 25 transitions [2020-01-16 21:18:26,603 INFO L479 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-01-16 21:18:26,621 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2020-01-16 21:18:26,621 INFO L130 PetriNetUnfolder]: For 358/362 co-relation queries the response was YES. [2020-01-16 21:18:26,621 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:18:26,621 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:18:26,622 INFO L426 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:18:26,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:18:26,622 INFO L82 PathProgramCache]: Analyzing trace with hash 940085819, now seen corresponding path program 5 times [2020-01-16 21:18:26,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:18:26,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551853838] [2020-01-16 21:18:26,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:18:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:18:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-01-16 21:18:26,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551853838] [2020-01-16 21:18:26,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:18:26,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-01-16 21:18:26,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678468483] [2020-01-16 21:18:26,725 INFO L458 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-01-16 21:18:26,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:18:26,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-01-16 21:18:26,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-01-16 21:18:26,726 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2020-01-16 21:18:26,726 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 25 transitions. Second operand 5 states. [2020-01-16 21:18:26,727 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:18:26,727 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2020-01-16 21:18:26,727 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:18:26,767 INFO L129 PetriNetUnfolder]: 5/42 cut-off events. [2020-01-16 21:18:26,767 INFO L130 PetriNetUnfolder]: For 460/475 co-relation queries the response was YES. [2020-01-16 21:18:26,768 INFO L76 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 42 events. 5/42 cut-off events. For 460/475 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 147 event pairs. 2/43 useless extension candidates. Maximal degree in co-relation 131. Up to 10 conditions per place. [2020-01-16 21:18:26,768 INFO L123 encePairwiseOnDemand]: 23/28 looper letters, 8 selfloop transitions, 14 changer transitions [2020-01-16 21:18:26,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-01-16 21:18:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-01-16 21:18:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2020-01-16 21:18:26,770 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.7571428571428571 [2020-01-16 21:18:26,770 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 106 transitions. [2020-01-16 21:18:26,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 106 transitions. [2020-01-16 21:18:26,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:18:26,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 106 transitions. [2020-01-16 21:18:26,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-01-16 21:18:26,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-01-16 21:18:26,772 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-01-16 21:18:26,772 INFO L174 Difference]: Start difference. First operand has 47 places, 25 transitions. Second operand 5 states and 106 transitions. [2020-01-16 21:18:26,773 INFO L199 Difference]: Finished difference. Result has 53 places, 27 transitions [2020-01-16 21:18:26,773 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=345, PETRI_PLACES=53, PETRI_TRANSITIONS=27} [2020-01-16 21:18:26,774 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 53 places, 27 transitions [2020-01-16 21:18:26,774 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 27 transitions [2020-01-16 21:18:26,782 INFO L129 PetriNetUnfolder]: 5/42 cut-off events. [2020-01-16 21:18:26,782 INFO L130 PetriNetUnfolder]: For 554/565 co-relation queries the response was YES. [2020-01-16 21:18:26,783 INFO L76 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 42 events. 5/42 cut-off events. For 554/565 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 152 event pairs. 1/42 useless extension candidates. Maximal degree in co-relation 129. Up to 10 conditions per place. [2020-01-16 21:18:26,783 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 1 of 53 places, 0 of 27 transitions, 6 of 345 flow. [2020-01-16 21:18:26,784 INFO L478 AbstractCegarLoop]: Abstraction has has 52 places, 27 transitions [2020-01-16 21:18:26,784 INFO L479 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-01-16 21:18:26,791 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2020-01-16 21:18:26,791 INFO L130 PetriNetUnfolder]: For 510/512 co-relation queries the response was YES. [2020-01-16 21:18:26,791 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:18:26,792 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:18:26,792 INFO L426 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:18:26,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:18:26,793 INFO L82 PathProgramCache]: Analyzing trace with hash -630022353, now seen corresponding path program 6 times [2020-01-16 21:18:26,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:18:26,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835233176] [2020-01-16 21:18:26,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:18:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:18:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-01-16 21:18:26,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835233176] [2020-01-16 21:18:26,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:18:26,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-01-16 21:18:26,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494239018] [2020-01-16 21:18:26,882 INFO L458 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-01-16 21:18:26,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:18:26,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-01-16 21:18:26,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-01-16 21:18:26,884 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2020-01-16 21:18:26,884 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 27 transitions. Second operand 5 states. [2020-01-16 21:18:26,884 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:18:26,884 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2020-01-16 21:18:26,884 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:18:26,926 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2020-01-16 21:18:26,926 INFO L130 PetriNetUnfolder]: For 691/721 co-relation queries the response was YES. [2020-01-16 21:18:26,927 INFO L76 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 41 events. 5/41 cut-off events. For 691/721 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 143 event pairs. 6/47 useless extension candidates. Maximal degree in co-relation 142. Up to 10 conditions per place. [2020-01-16 21:18:26,927 INFO L123 encePairwiseOnDemand]: 23/28 looper letters, 7 selfloop transitions, 15 changer transitions [2020-01-16 21:18:26,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-01-16 21:18:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-01-16 21:18:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2020-01-16 21:18:26,929 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.75 [2020-01-16 21:18:26,929 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 105 transitions. [2020-01-16 21:18:26,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 105 transitions. [2020-01-16 21:18:26,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:18:26,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 105 transitions. [2020-01-16 21:18:26,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-01-16 21:18:26,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-01-16 21:18:26,931 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-01-16 21:18:26,931 INFO L174 Difference]: Start difference. First operand has 52 places, 27 transitions. Second operand 5 states and 105 transitions. [2020-01-16 21:18:26,932 INFO L199 Difference]: Finished difference. Result has 57 places, 27 transitions [2020-01-16 21:18:26,932 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=380, PETRI_PLACES=57, PETRI_TRANSITIONS=27} [2020-01-16 21:18:26,932 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 57 places, 27 transitions [2020-01-16 21:18:26,932 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 57 places, 27 transitions [2020-01-16 21:18:26,939 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2020-01-16 21:18:26,939 INFO L130 PetriNetUnfolder]: For 615/619 co-relation queries the response was YES. [2020-01-16 21:18:26,940 INFO L76 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 41 events. 5/41 cut-off events. For 615/619 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 148 event pairs. 0/41 useless extension candidates. Maximal degree in co-relation 141. Up to 10 conditions per place. [2020-01-16 21:18:26,941 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 2 of 57 places, 0 of 27 transitions, 6 of 380 flow. [2020-01-16 21:18:26,941 INFO L478 AbstractCegarLoop]: Abstraction has has 55 places, 27 transitions [2020-01-16 21:18:26,941 INFO L479 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-01-16 21:18:26,948 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2020-01-16 21:18:26,948 INFO L130 PetriNetUnfolder]: For 641/651 co-relation queries the response was YES. [2020-01-16 21:18:26,952 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.01 09:18:26 BasicIcfg [2020-01-16 21:18:26,952 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-01-16 21:18:26,955 INFO L168 Benchmark]: Toolchain (without parser) took 2443.13 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 120.8 MB in the beginning and 128.1 MB in the end (delta: -7.2 MB). Peak memory consumption was 55.7 MB. Max. memory is 7.1 GB. [2020-01-16 21:18:26,956 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.42 ms. Allocated memory is still 138.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-01-16 21:18:26,957 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.58 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 119.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-01-16 21:18:26,957 INFO L168 Benchmark]: Boogie Preprocessor took 21.77 ms. Allocated memory is still 138.9 MB. Free memory was 119.1 MB in the beginning and 118.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-01-16 21:18:26,961 INFO L168 Benchmark]: RCFGBuilder took 246.54 ms. Allocated memory is still 138.9 MB. Free memory was 118.0 MB in the beginning and 107.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-01-16 21:18:26,962 INFO L168 Benchmark]: TraceAbstraction took 2129.21 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 107.5 MB in the beginning and 128.1 MB in the end (delta: -20.6 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2020-01-16 21:18:26,968 INFO L335 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 0.42 ms. Allocated memory is still 138.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.58 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 119.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.77 ms. Allocated memory is still 138.9 MB. Free memory was 119.1 MB in the beginning and 118.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 246.54 ms. Allocated memory is still 138.9 MB. Free memory was 118.0 MB in the beginning and 107.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2129.21 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 107.5 MB in the beginning and 128.1 MB in the end (delta: -20.6 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.1s, 28 ProgramPointsBefore, 23 ProgramPointsAfterwards, 24 TransitionsBefore, 20 TransitionsAfterwards, 84 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 24 VarBasedMoverChecksPositive, 0 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 27 CheckedPairsTotal, 4 TotalNumberOfCompositions - PositiveResult [Line: 19]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. Result: SAFE, OverallTime: 2.0s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, HoareTripleCheckerStatistics: 38 SDtfs, 43 SDslu, 20 SDs, 0 SdLazy, 74 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 4860 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...