/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-d9e330d [2020-02-10 22:59:59,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-02-10 22:59:59,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-02-10 22:59:59,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-02-10 22:59:59,693 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 [2020-02-10 22:59:59,715 INFO L113 SettingsManager]: Loading preferences was successful [2020-02-10 22:59:59,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-02-10 22:59:59,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-02-10 22:59:59,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-02-10 22:59:59,718 INFO L138 SettingsManager]: * Use SBE=true [2020-02-10 22:59:59,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-02-10 22:59:59,718 INFO L138 SettingsManager]: * sizeof long=4 [2020-02-10 22:59:59,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-02-10 22:59:59,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-02-10 22:59:59,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-02-10 22:59:59,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-02-10 22:59:59,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-02-10 22:59:59,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-02-10 22:59:59,721 INFO L138 SettingsManager]: * sizeof long double=12 [2020-02-10 22:59:59,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-02-10 22:59:59,721 INFO L138 SettingsManager]: * Use constant arrays=true [2020-02-10 22:59:59,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-02-10 22:59:59,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-02-10 22:59:59,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-02-10 22:59:59,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-02-10 22:59:59,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-02-10 22:59:59,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-02-10 22:59:59,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-02-10 22:59:59,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-02-10 22:59:59,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-02-10 22:59:59,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-02-10 22:59:59,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-02-10 22:59:59,724 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-02-10 22:59:59,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-02-10 23:00:00,002 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-02-10 23:00:00,020 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-02-10 23:00:00,024 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-02-10 23:00:00,026 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-02-10 23:00:00,026 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-02-10 23:00:00,027 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl [2020-02-10 23:00:00,027 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl' [2020-02-10 23:00:00,063 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-02-10 23:00:00,068 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-02-10 23:00:00,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-02-10 23:00:00,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-02-10 23:00:00,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-02-10 23:00:00,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:00:00" (1/1) ... [2020-02-10 23:00:00,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:00:00" (1/1) ... [2020-02-10 23:00:00,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-02-10 23:00:00,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-02-10 23:00:00,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-02-10 23:00:00,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-02-10 23:00:00,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:00:00" (1/1) ... [2020-02-10 23:00:00,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:00:00" (1/1) ... [2020-02-10 23:00:00,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:00:00" (1/1) ... [2020-02-10 23:00:00,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:00:00" (1/1) ... [2020-02-10 23:00:00,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:00:00" (1/1) ... [2020-02-10 23:00:00,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:00:00" (1/1) ... [2020-02-10 23:00:00,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:00:00" (1/1) ... [2020-02-10 23:00:00,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-02-10 23:00:00,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-02-10 23:00:00,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-02-10 23:00:00,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-02-10 23:00:00,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:00:00" (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 [2020-02-10 23:00:00,214 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-02-10 23:00:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-02-10 23:00:00,214 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-02-10 23:00:00,216 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2020-02-10 23:00:00,217 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2020-02-10 23:00:00,217 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2020-02-10 23:00:00,217 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-02-10 23:00:00,217 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-02-10 23:00:00,218 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-02-10 23:00:00,218 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-02-10 23:00:00,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-02-10 23:00:00,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-02-10 23:00:00,220 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-02-10 23:00:00,396 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-02-10 23:00:00,396 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-02-10 23:00:00,400 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 11:00:00 BoogieIcfgContainer [2020-02-10 23:00:00,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-02-10 23:00:00,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-02-10 23:00:00,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-02-10 23:00:00,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-02-10 23:00:00,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:00:00" (1/2) ... [2020-02-10 23:00:00,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56994ded and model type example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 11:00:00, skipping insertion in model container [2020-02-10 23:00:00,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 11:00:00" (2/2) ... [2020-02-10 23:00:00,409 INFO L109 eAbstractionObserver]: Analyzing ICFG example_3.bpl [2020-02-10 23:00:00,419 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-02-10 23:00:00,427 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-02-10 23:00:00,428 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-02-10 23:00:00,593 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-02-10 23:00:00,629 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-02-10 23:00:00,630 INFO L376 AbstractCegarLoop]: Hoare is false [2020-02-10 23:00:00,630 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-02-10 23:00:00,630 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-02-10 23:00:00,630 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-02-10 23:00:00,630 INFO L380 AbstractCegarLoop]: Difference is false [2020-02-10 23:00:00,630 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-02-10 23:00:00,631 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-02-10 23:00:00,650 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions [2020-02-10 23:00:00,682 INFO L129 PetriNetUnfolder]: 5/24 cut-off events. [2020-02-10 23:00:00,682 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-02-10 23:00:00,688 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. [2020-02-10 23:00:00,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions [2020-02-10 23:00:00,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 19 transitions [2020-02-10 23:00:00,701 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 23 places, 19 transitions [2020-02-10 23:00:00,702 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 23 places, 19 transitions [2020-02-10 23:00:00,717 INFO L129 PetriNetUnfolder]: 5/22 cut-off events. [2020-02-10 23:00:00,717 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-02-10 23:00:00,720 INFO L76 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 22 events. 5/22 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2020-02-10 23:00:00,723 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 23 places, 19 transitions [2020-02-10 23:00:00,733 INFO L129 PetriNetUnfolder]: 5/22 cut-off events. [2020-02-10 23:00:00,733 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-02-10 23:00:00,734 INFO L76 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 22 events. 5/22 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2020-02-10 23:00:00,735 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 84 [2020-02-10 23:00:00,736 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-02-10 23:00:00,790 INFO L206 etLargeBlockEncoding]: Checked pairs total: 27 [2020-02-10 23:00:00,790 INFO L214 etLargeBlockEncoding]: Total number of compositions: 3 [2020-02-10 23:00:00,790 INFO L160 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 93 [2020-02-10 23:00:00,802 INFO L129 PetriNetUnfolder]: 5/18 cut-off events. [2020-02-10 23:00:00,802 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-02-10 23:00:00,802 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:00:00,803 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:00:00,804 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:00:00,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:00:00,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1482935430, now seen corresponding path program 1 times [2020-02-10 23:00:00,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:00:00,820 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891256552] [2020-02-10 23:00:00,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:00:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:00:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:00:00,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891256552] [2020-02-10 23:00:00,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:00:00,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-02-10 23:00:00,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956288184] [2020-02-10 23:00:00,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-02-10 23:00:00,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:00:00,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-02-10 23:00:00,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-02-10 23:00:00,999 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 27 [2020-02-10 23:00:01,000 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions. Second operand 3 states. [2020-02-10 23:00:01,001 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:00:01,001 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 27 [2020-02-10 23:00:01,003 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:00:01,037 INFO L129 PetriNetUnfolder]: 3/16 cut-off events. [2020-02-10 23:00:01,037 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-02-10 23:00:01,038 INFO L76 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 16 events. 3/16 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs. 1/17 useless extension candidates. Maximal degree in co-relation 15. Up to 4 conditions per place. [2020-02-10 23:00:01,043 INFO L145 encePairwiseOnDemand]: 25/27 looper letters, 2 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2020-02-10 23:00:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-02-10 23:00:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-02-10 23:00:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2020-02-10 23:00:01,058 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.9012345679012346 [2020-02-10 23:00:01,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 73 transitions. [2020-02-10 23:00:01,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 73 transitions. [2020-02-10 23:00:01,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:00:01,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 73 transitions. [2020-02-10 23:00:01,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-02-10 23:00:01,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-02-10 23:00:01,069 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-02-10 23:00:01,071 INFO L178 Difference]: Start difference. First operand has 20 places, 16 transitions. Second operand 3 states and 73 transitions. [2020-02-10 23:00:01,072 INFO L206 Difference]: Finished difference. Result has 22 places, 15 transitions [2020-02-10 23:00:01,075 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2020-02-10 23:00:01,076 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 22 places, 15 transitions [2020-02-10 23:00:01,082 INFO L129 PetriNetUnfolder]: 3/16 cut-off events. [2020-02-10 23:00:01,082 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-02-10 23:00:01,083 INFO L76 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 16 events. 3/16 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 17 event pairs. 0/16 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2020-02-10 23:00:01,083 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 15 transitions [2020-02-10 23:00:01,084 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 15 transitions [2020-02-10 23:00:01,087 INFO L479 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions [2020-02-10 23:00:01,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-02-10 23:00:01,093 INFO L129 PetriNetUnfolder]: 3/15 cut-off events. [2020-02-10 23:00:01,093 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-02-10 23:00:01,094 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:00:01,094 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:00:01,094 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:00:01,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:00:01,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1742319870, now seen corresponding path program 1 times [2020-02-10 23:00:01,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:00:01,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674600570] [2020-02-10 23:00:01,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:00:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:00:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:00:01,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674600570] [2020-02-10 23:00:01,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:00:01,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-02-10 23:00:01,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285748885] [2020-02-10 23:00:01,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-02-10 23:00:01,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:00:01,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-02-10 23:00:01,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-02-10 23:00:01,127 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 27 [2020-02-10 23:00:01,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions. Second operand 3 states. [2020-02-10 23:00:01,127 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:00:01,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 27 [2020-02-10 23:00:01,128 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:00:01,150 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2020-02-10 23:00:01,150 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2020-02-10 23:00:01,151 INFO L76 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 10 events. 0/10 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs. 2/12 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2020-02-10 23:00:01,152 INFO L145 encePairwiseOnDemand]: 24/27 looper letters, 1 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2020-02-10 23:00:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-02-10 23:00:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-02-10 23:00:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2020-02-10 23:00:01,154 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.9012345679012346 [2020-02-10 23:00:01,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 73 transitions. [2020-02-10 23:00:01,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 73 transitions. [2020-02-10 23:00:01,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:00:01,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 73 transitions. [2020-02-10 23:00:01,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-02-10 23:00:01,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-02-10 23:00:01,157 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-02-10 23:00:01,158 INFO L178 Difference]: Start difference. First operand has 22 places, 15 transitions. Second operand 3 states and 73 transitions. [2020-02-10 23:00:01,158 INFO L206 Difference]: Finished difference. Result has 24 places, 10 transitions [2020-02-10 23:00:01,159 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=24, PETRI_TRANSITIONS=10} [2020-02-10 23:00:01,159 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 24 places, 10 transitions [2020-02-10 23:00:01,164 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2020-02-10 23:00:01,164 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-02-10 23:00:01,164 INFO L76 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 10 events. 0/10 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 5 event pairs. 0/10 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2020-02-10 23:00:01,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 10 transitions [2020-02-10 23:00:01,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 10 transitions [2020-02-10 23:00:01,166 INFO L479 AbstractCegarLoop]: Abstraction has has 24 places, 10 transitions [2020-02-10 23:00:01,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-02-10 23:00:01,170 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2020-02-10 23:00:01,170 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-02-10 23:00:01,170 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:00:01,171 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:00:01,171 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:00:01,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:00:01,171 INFO L82 PathProgramCache]: Analyzing trace with hash 33659132, now seen corresponding path program 1 times [2020-02-10 23:00:01,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:00:01,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203896841] [2020-02-10 23:00:01,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:00:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:00:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:00:01,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203896841] [2020-02-10 23:00:01,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:00:01,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-02-10 23:00:01,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019438716] [2020-02-10 23:00:01,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-02-10 23:00:01,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:00:01,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-02-10 23:00:01,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-02-10 23:00:01,354 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2020-02-10 23:00:01,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 10 transitions. Second operand 5 states. [2020-02-10 23:00:01,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:00:01,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2020-02-10 23:00:01,355 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:00:01,425 INFO L129 PetriNetUnfolder]: 3/28 cut-off events. [2020-02-10 23:00:01,425 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-02-10 23:00:01,425 INFO L76 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 28 events. 3/28 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 59 event pairs. 1/26 useless extension candidates. Maximal degree in co-relation 54. Up to 7 conditions per place. [2020-02-10 23:00:01,427 INFO L145 encePairwiseOnDemand]: 23/27 looper letters, 5 selfloop transitions, 2 changer transitions 1/14 dead transitions. [2020-02-10 23:00:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-02-10 23:00:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-02-10 23:00:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2020-02-10 23:00:01,429 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2020-02-10 23:00:01,429 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2020-02-10 23:00:01,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2020-02-10 23:00:01,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:00:01,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2020-02-10 23:00:01,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-02-10 23:00:01,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-02-10 23:00:01,432 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-02-10 23:00:01,432 INFO L178 Difference]: Start difference. First operand has 24 places, 10 transitions. Second operand 5 states and 104 transitions. [2020-02-10 23:00:01,433 INFO L206 Difference]: Finished difference. Result has 31 places, 11 transitions [2020-02-10 23:00:01,433 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=57, PETRI_PLACES=31, PETRI_TRANSITIONS=11} [2020-02-10 23:00:01,433 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 31 places, 11 transitions [2020-02-10 23:00:01,438 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2020-02-10 23:00:01,438 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2020-02-10 23:00:01,439 INFO L76 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 18 events. 0/18 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs. 0/16 useless extension candidates. Maximal degree in co-relation 39. Up to 4 conditions per place. [2020-02-10 23:00:01,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 11 transitions [2020-02-10 23:00:01,440 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 11 transitions [2020-02-10 23:00:01,440 INFO L479 AbstractCegarLoop]: Abstraction has has 30 places, 11 transitions [2020-02-10 23:00:01,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-02-10 23:00:01,445 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2020-02-10 23:00:01,445 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2020-02-10 23:00:01,445 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:00:01,446 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:00:01,446 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:00:01,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:00:01,446 INFO L82 PathProgramCache]: Analyzing trace with hash -812759278, now seen corresponding path program 2 times [2020-02-10 23:00:01,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:00:01,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36627620] [2020-02-10 23:00:01,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:00:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:00:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:00:01,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36627620] [2020-02-10 23:00:01,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:00:01,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-02-10 23:00:01,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027800271] [2020-02-10 23:00:01,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-02-10 23:00:01,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:00:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-02-10 23:00:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-02-10 23:00:01,578 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2020-02-10 23:00:01,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 11 transitions. Second operand 5 states. [2020-02-10 23:00:01,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:00:01,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2020-02-10 23:00:01,579 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:00:01,624 INFO L129 PetriNetUnfolder]: 2/29 cut-off events. [2020-02-10 23:00:01,624 INFO L130 PetriNetUnfolder]: For 37/40 co-relation queries the response was YES. [2020-02-10 23:00:01,625 INFO L76 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 29 events. 2/29 cut-off events. For 37/40 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 80 event pairs. 1/28 useless extension candidates. Maximal degree in co-relation 74. Up to 7 conditions per place. [2020-02-10 23:00:01,626 INFO L145 encePairwiseOnDemand]: 23/27 looper letters, 5 selfloop transitions, 3 changer transitions 2/16 dead transitions. [2020-02-10 23:00:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-02-10 23:00:01,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-02-10 23:00:01,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2020-02-10 23:00:01,628 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2020-02-10 23:00:01,628 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2020-02-10 23:00:01,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2020-02-10 23:00:01,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:00:01,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2020-02-10 23:00:01,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-02-10 23:00:01,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-02-10 23:00:01,631 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-02-10 23:00:01,631 INFO L178 Difference]: Start difference. First operand has 30 places, 11 transitions. Second operand 5 states and 104 transitions. [2020-02-10 23:00:01,632 INFO L206 Difference]: Finished difference. Result has 37 places, 12 transitions [2020-02-10 23:00:01,632 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=78, PETRI_PLACES=37, PETRI_TRANSITIONS=12} [2020-02-10 23:00:01,632 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 37 places, 12 transitions [2020-02-10 23:00:01,638 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2020-02-10 23:00:01,638 INFO L130 PetriNetUnfolder]: For 32/33 co-relation queries the response was YES. [2020-02-10 23:00:01,639 INFO L76 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 20 events. 0/20 cut-off events. For 32/33 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 36 event pairs. 0/19 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2020-02-10 23:00:01,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 12 transitions [2020-02-10 23:00:01,640 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 12 transitions [2020-02-10 23:00:01,640 INFO L479 AbstractCegarLoop]: Abstraction has has 36 places, 12 transitions [2020-02-10 23:00:01,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-02-10 23:00:01,646 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2020-02-10 23:00:01,646 INFO L130 PetriNetUnfolder]: For 32/33 co-relation queries the response was YES. [2020-02-10 23:00:01,646 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:00:01,647 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:00:01,647 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:00:01,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:00:01,647 INFO L82 PathProgramCache]: Analyzing trace with hash 71195792, now seen corresponding path program 3 times [2020-02-10 23:00:01,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:00:01,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555479225] [2020-02-10 23:00:01,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:00:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:00:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:00:01,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555479225] [2020-02-10 23:00:01,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:00:01,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-02-10 23:00:01,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326434314] [2020-02-10 23:00:01,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-02-10 23:00:01,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:00:01,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-02-10 23:00:01,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-02-10 23:00:01,768 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2020-02-10 23:00:01,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 12 transitions. Second operand 5 states. [2020-02-10 23:00:01,769 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:00:01,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2020-02-10 23:00:01,769 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:00:01,825 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2020-02-10 23:00:01,825 INFO L130 PetriNetUnfolder]: For 87/92 co-relation queries the response was YES. [2020-02-10 23:00:01,829 INFO L76 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 31 events. 0/31 cut-off events. For 87/92 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 97 event pairs. 1/29 useless extension candidates. Maximal degree in co-relation 95. Up to 7 conditions per place. [2020-02-10 23:00:01,830 INFO L145 encePairwiseOnDemand]: 23/27 looper letters, 6 selfloop transitions, 2 changer transitions 1/15 dead transitions. [2020-02-10 23:00:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-02-10 23:00:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-02-10 23:00:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2020-02-10 23:00:01,832 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2020-02-10 23:00:01,832 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2020-02-10 23:00:01,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2020-02-10 23:00:01,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:00:01,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2020-02-10 23:00:01,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-02-10 23:00:01,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-02-10 23:00:01,836 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-02-10 23:00:01,837 INFO L178 Difference]: Start difference. First operand has 36 places, 12 transitions. Second operand 5 states and 104 transitions. [2020-02-10 23:00:01,837 INFO L206 Difference]: Finished difference. Result has 43 places, 13 transitions [2020-02-10 23:00:01,837 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=43, PETRI_TRANSITIONS=13} [2020-02-10 23:00:01,838 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 43 places, 13 transitions [2020-02-10 23:00:01,844 INFO L129 PetriNetUnfolder]: 0/27 cut-off events. [2020-02-10 23:00:01,844 INFO L130 PetriNetUnfolder]: For 97/98 co-relation queries the response was YES. [2020-02-10 23:00:01,845 INFO L76 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 27 events. 0/27 cut-off events. For 97/98 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 72 event pairs. 0/25 useless extension candidates. Maximal degree in co-relation 83. Up to 5 conditions per place. [2020-02-10 23:00:01,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 13 transitions [2020-02-10 23:00:01,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 13 transitions [2020-02-10 23:00:01,846 INFO L479 AbstractCegarLoop]: Abstraction has has 42 places, 13 transitions [2020-02-10 23:00:01,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-02-10 23:00:01,852 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2020-02-10 23:00:01,852 INFO L130 PetriNetUnfolder]: For 97/98 co-relation queries the response was YES. [2020-02-10 23:00:01,852 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:00:01,853 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:00:01,853 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:00:01,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:00:01,853 INFO L82 PathProgramCache]: Analyzing trace with hash 902364692, now seen corresponding path program 4 times [2020-02-10 23:00:01,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:00:01,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082864151] [2020-02-10 23:00:01,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:00:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:00:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:00:01,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082864151] [2020-02-10 23:00:01,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:00:01,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-02-10 23:00:01,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785887850] [2020-02-10 23:00:01,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-02-10 23:00:01,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:00:01,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-02-10 23:00:01,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-02-10 23:00:01,955 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2020-02-10 23:00:01,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 13 transitions. Second operand 5 states. [2020-02-10 23:00:01,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:00:01,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2020-02-10 23:00:01,955 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:00:02,021 INFO L129 PetriNetUnfolder]: 0/26 cut-off events. [2020-02-10 23:00:02,022 INFO L130 PetriNetUnfolder]: For 137/145 co-relation queries the response was YES. [2020-02-10 23:00:02,023 INFO L76 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 26 events. 0/26 cut-off events. For 137/145 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 69 event pairs. 1/26 useless extension candidates. Maximal degree in co-relation 92. Up to 5 conditions per place. [2020-02-10 23:00:02,024 INFO L145 encePairwiseOnDemand]: 23/27 looper letters, 5 selfloop transitions, 5 changer transitions 1/17 dead transitions. [2020-02-10 23:00:02,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-02-10 23:00:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-02-10 23:00:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2020-02-10 23:00:02,026 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2020-02-10 23:00:02,026 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2020-02-10 23:00:02,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2020-02-10 23:00:02,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:00:02,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2020-02-10 23:00:02,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-02-10 23:00:02,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-02-10 23:00:02,030 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-02-10 23:00:02,030 INFO L178 Difference]: Start difference. First operand has 42 places, 13 transitions. Second operand 5 states and 104 transitions. [2020-02-10 23:00:02,031 INFO L206 Difference]: Finished difference. Result has 48 places, 14 transitions [2020-02-10 23:00:02,031 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=48, PETRI_TRANSITIONS=14} [2020-02-10 23:00:02,032 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 48 places, 14 transitions [2020-02-10 23:00:02,039 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2020-02-10 23:00:02,040 INFO L130 PetriNetUnfolder]: For 144/148 co-relation queries the response was YES. [2020-02-10 23:00:02,040 INFO L76 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 25 events. 0/25 cut-off events. For 144/148 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 65 event pairs. 0/24 useless extension candidates. Maximal degree in co-relation 86. Up to 5 conditions per place. [2020-02-10 23:00:02,040 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 14 transitions [2020-02-10 23:00:02,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 14 transitions [2020-02-10 23:00:02,042 INFO L479 AbstractCegarLoop]: Abstraction has has 48 places, 14 transitions [2020-02-10 23:00:02,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-02-10 23:00:02,048 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2020-02-10 23:00:02,049 INFO L130 PetriNetUnfolder]: For 144/148 co-relation queries the response was YES. [2020-02-10 23:00:02,049 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:00:02,049 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:00:02,049 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:00:02,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:00:02,050 INFO L82 PathProgramCache]: Analyzing trace with hash -832277188, now seen corresponding path program 5 times [2020-02-10 23:00:02,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:00:02,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57683749] [2020-02-10 23:00:02,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:00:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:00:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:00:02,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57683749] [2020-02-10 23:00:02,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:00:02,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-02-10 23:00:02,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429325042] [2020-02-10 23:00:02,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-02-10 23:00:02,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:00:02,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-02-10 23:00:02,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-02-10 23:00:02,180 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2020-02-10 23:00:02,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 14 transitions. Second operand 5 states. [2020-02-10 23:00:02,181 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:00:02,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2020-02-10 23:00:02,183 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:00:02,231 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2020-02-10 23:00:02,231 INFO L130 PetriNetUnfolder]: For 202/217 co-relation queries the response was YES. [2020-02-10 23:00:02,232 INFO L76 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 24 events. 0/24 cut-off events. For 202/217 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 61 event pairs. 2/25 useless extension candidates. Maximal degree in co-relation 93. Up to 5 conditions per place. [2020-02-10 23:00:02,234 INFO L145 encePairwiseOnDemand]: 23/27 looper letters, 4 selfloop transitions, 3 changer transitions 3/16 dead transitions. [2020-02-10 23:00:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-02-10 23:00:02,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-02-10 23:00:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2020-02-10 23:00:02,235 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.762962962962963 [2020-02-10 23:00:02,235 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 103 transitions. [2020-02-10 23:00:02,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 103 transitions. [2020-02-10 23:00:02,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:00:02,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 103 transitions. [2020-02-10 23:00:02,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-02-10 23:00:02,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-02-10 23:00:02,240 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-02-10 23:00:02,240 INFO L178 Difference]: Start difference. First operand has 48 places, 14 transitions. Second operand 5 states and 103 transitions. [2020-02-10 23:00:02,241 INFO L206 Difference]: Finished difference. Result has 54 places, 13 transitions [2020-02-10 23:00:02,241 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=54, PETRI_TRANSITIONS=13} [2020-02-10 23:00:02,242 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 54 places, 13 transitions [2020-02-10 23:00:02,247 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2020-02-10 23:00:02,247 INFO L130 PetriNetUnfolder]: For 128/129 co-relation queries the response was YES. [2020-02-10 23:00:02,250 INFO L76 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 18 events. 0/18 cut-off events. For 128/129 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs. 0/18 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2020-02-10 23:00:02,250 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 13 transitions [2020-02-10 23:00:02,251 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 13 transitions [2020-02-10 23:00:02,251 INFO L479 AbstractCegarLoop]: Abstraction has has 52 places, 13 transitions [2020-02-10 23:00:02,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-02-10 23:00:02,256 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2020-02-10 23:00:02,256 INFO L130 PetriNetUnfolder]: For 146/151 co-relation queries the response was YES. [2020-02-10 23:00:02,256 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:00:02,256 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:00:02,256 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:00:02,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:00:02,257 INFO L82 PathProgramCache]: Analyzing trace with hash 644826302, now seen corresponding path program 6 times [2020-02-10 23:00:02,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:00:02,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008872935] [2020-02-10 23:00:02,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:00:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:00:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:00:02,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008872935] [2020-02-10 23:00:02,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:00:02,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-02-10 23:00:02,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719338691] [2020-02-10 23:00:02,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-02-10 23:00:02,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:00:02,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-02-10 23:00:02,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-02-10 23:00:02,371 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2020-02-10 23:00:02,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 13 transitions. Second operand 5 states. [2020-02-10 23:00:02,371 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:00:02,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2020-02-10 23:00:02,372 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:00:02,404 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2020-02-10 23:00:02,406 INFO L130 PetriNetUnfolder]: For 199/214 co-relation queries the response was YES. [2020-02-10 23:00:02,407 INFO L76 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 17 events. 0/17 cut-off events. For 199/214 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs. 4/21 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2020-02-10 23:00:02,408 INFO L145 encePairwiseOnDemand]: 23/27 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2020-02-10 23:00:02,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-02-10 23:00:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-02-10 23:00:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2020-02-10 23:00:02,409 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.7481481481481481 [2020-02-10 23:00:02,409 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 101 transitions. [2020-02-10 23:00:02,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 101 transitions. [2020-02-10 23:00:02,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:00:02,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 101 transitions. [2020-02-10 23:00:02,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-02-10 23:00:02,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-02-10 23:00:02,413 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-02-10 23:00:02,413 INFO L178 Difference]: Start difference. First operand has 52 places, 13 transitions. Second operand 5 states and 101 transitions. [2020-02-10 23:00:02,413 INFO L206 Difference]: Finished difference. Result has 56 places, 0 transitions [2020-02-10 23:00:02,413 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=56, PETRI_TRANSITIONS=0} [2020-02-10 23:00:02,414 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 56 places, 0 transitions [2020-02-10 23:00:02,414 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2020-02-10 23:00:02,414 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-02-10 23:00:02,415 INFO L76 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2020-02-10 23:00:02,415 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 0 transitions [2020-02-10 23:00:02,415 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions [2020-02-10 23:00:02,415 INFO L479 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions [2020-02-10 23:00:02,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-02-10 23:00:02,416 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2020-02-10 23:00:02,416 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-02-10 23:00:02,420 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 11:00:02 BasicIcfg [2020-02-10 23:00:02,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-02-10 23:00:02,426 INFO L168 Benchmark]: Toolchain (without parser) took 2358.61 ms. Allocated memory was 144.2 MB in the beginning and 207.1 MB in the end (delta: 62.9 MB). Free memory was 119.3 MB in the beginning and 150.7 MB in the end (delta: -31.3 MB). Peak memory consumption was 31.6 MB. Max. memory is 7.1 GB. [2020-02-10 23:00:02,429 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.50 ms. Allocated memory is still 144.2 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-02-10 23:00:02,435 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.38 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 117.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-02-10 23:00:02,436 INFO L168 Benchmark]: Boogie Preprocessor took 23.48 ms. Allocated memory is still 144.2 MB. Free memory was 117.4 MB in the beginning and 116.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-02-10 23:00:02,438 INFO L168 Benchmark]: RCFGBuilder took 269.41 ms. Allocated memory is still 144.2 MB. Free memory was 116.3 MB in the beginning and 106.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-02-10 23:00:02,440 INFO L168 Benchmark]: TraceAbstraction took 2019.00 ms. Allocated memory was 144.2 MB in the beginning and 207.1 MB in the end (delta: 62.9 MB). Free memory was 105.6 MB in the beginning and 150.7 MB in the end (delta: -45.0 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2020-02-10 23:00:02,456 INFO L336 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 0.50 ms. Allocated memory is still 144.2 MB. Free memory was 120.6 MB in the beginning and 120.4 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 37.38 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 117.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.48 ms. Allocated memory is still 144.2 MB. Free memory was 117.4 MB in the beginning and 116.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 269.41 ms. Allocated memory is still 144.2 MB. Free memory was 116.3 MB in the beginning and 106.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2019.00 ms. Allocated memory was 144.2 MB in the beginning and 207.1 MB in the end (delta: 62.9 MB). Free memory was 105.6 MB in the beginning and 150.7 MB in the end (delta: -45.0 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.0s, 23 ProgramPointsBefore, 20 ProgramPointsAfterwards, 19 TransitionsBefore, 16 TransitionsAfterwards, 84 CoEnabledTransitionPairs, 2 FixpointIterations, 0 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, 3 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: 1.7s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 37 SDtfs, 32 SDslu, 18 SDs, 0 SdLazy, 59 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s 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=16occurred in iteration=0, 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, 61 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, 4590 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...