/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-VariableLbe.epf -i ../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-abd8500 [2020-01-16 21:46:47,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-01-16 21:46:47,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-01-16 21:46:47,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-01-16 21:46:47,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-01-16 21:46:47,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-01-16 21:46:47,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-01-16 21:46:47,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-01-16 21:46:47,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-01-16 21:46:47,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-01-16 21:46:47,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-01-16 21:46:47,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-01-16 21:46:47,094 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-VariableLbe.epf [2020-01-16 21:46:47,117 INFO L113 SettingsManager]: Loading preferences was successful [2020-01-16 21:46:47,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-01-16 21:46:47,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-01-16 21:46:47,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-01-16 21:46:47,119 INFO L138 SettingsManager]: * Use SBE=true [2020-01-16 21:46:47,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-01-16 21:46:47,120 INFO L138 SettingsManager]: * sizeof long=4 [2020-01-16 21:46:47,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-01-16 21:46:47,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-01-16 21:46:47,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-01-16 21:46:47,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-01-16 21:46:47,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-01-16 21:46:47,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-01-16 21:46:47,123 INFO L138 SettingsManager]: * sizeof long double=12 [2020-01-16 21:46:47,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-01-16 21:46:47,123 INFO L138 SettingsManager]: * Use constant arrays=true [2020-01-16 21:46:47,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-01-16 21:46:47,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-01-16 21:46:47,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-01-16 21:46:47,124 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-01-16 21:46:47,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-01-16 21:46:47,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-01-16 21:46:47,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-01-16 21:46:47,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-01-16 21:46:47,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-01-16 21:46:47,125 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-01-16 21:46:47,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-01-16 21:46:47,125 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-01-16 21:46:47,126 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-01-16 21:46:47,126 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-01-16 21:46:47,398 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-01-16 21:46:47,417 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-01-16 21:46:47,420 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-01-16 21:46:47,422 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-01-16 21:46:47,422 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-01-16 21:46:47,423 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl [2020-01-16 21:46:47,424 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl' [2020-01-16 21:46:47,456 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-01-16 21:46:47,458 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-01-16 21:46:47,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-01-16 21:46:47,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-01-16 21:46:47,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-01-16 21:46:47,474 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 09:46:47" (1/1) ... [2020-01-16 21:46:47,484 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 09:46:47" (1/1) ... [2020-01-16 21:46:47,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-01-16 21:46:47,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-01-16 21:46:47,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-01-16 21:46:47,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-01-16 21:46:47,504 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 09:46:47" (1/1) ... [2020-01-16 21:46:47,504 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 09:46:47" (1/1) ... [2020-01-16 21:46:47,505 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 09:46:47" (1/1) ... [2020-01-16 21:46:47,505 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 09:46:47" (1/1) ... [2020-01-16 21:46:47,508 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 09:46:47" (1/1) ... [2020-01-16 21:46:47,509 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 09:46:47" (1/1) ... [2020-01-16 21:46:47,510 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 09:46:47" (1/1) ... [2020-01-16 21:46:47,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-01-16 21:46:47,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-01-16 21:46:47,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-01-16 21:46:47,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-01-16 21:46:47,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:46:47" (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 21:46:47,579 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-01-16 21:46:47,580 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-01-16 21:46:47,580 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-01-16 21:46:47,580 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2020-01-16 21:46:47,580 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2020-01-16 21:46:47,581 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2020-01-16 21:46:47,581 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-01-16 21:46:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-01-16 21:46:47,581 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-01-16 21:46:47,581 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-01-16 21:46:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-01-16 21:46:47,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-01-16 21:46:47,583 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 21:46:47,740 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-01-16 21:46:47,740 INFO L287 CfgBuilder]: Removed 0 assume(true) statements. [2020-01-16 21:46:47,741 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.01 09:46:47 BoogieIcfgContainer [2020-01-16 21:46:47,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-01-16 21:46:47,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-01-16 21:46:47,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-01-16 21:46:47,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-01-16 21:46:47,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:46:47" (1/2) ... [2020-01-16 21:46:47,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c450df and model type example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.01 09:46:47, skipping insertion in model container [2020-01-16 21:46:47,748 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 09:46:47" (2/2) ... [2020-01-16 21:46:47,750 INFO L109 eAbstractionObserver]: Analyzing ICFG example_3.bpl [2020-01-16 21:46:47,760 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-01-16 21:46:47,770 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-01-16 21:46:47,771 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-01-16 21:46:47,880 INFO L250 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-01-16 21:46:47,899 INFO L374 AbstractCegarLoop]: Interprodecural is true [2020-01-16 21:46:47,900 INFO L375 AbstractCegarLoop]: Hoare is false [2020-01-16 21:46:47,900 INFO L376 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-01-16 21:46:47,900 INFO L377 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-01-16 21:46:47,900 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-01-16 21:46:47,900 INFO L379 AbstractCegarLoop]: Difference is false [2020-01-16 21:46:47,900 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-01-16 21:46:47,901 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-01-16 21:46:47,911 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 24 transitions [2020-01-16 21:46:47,913 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions [2020-01-16 21:46:47,954 INFO L129 PetriNetUnfolder]: 5/24 cut-off events. [2020-01-16 21:46:47,954 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 21:46:47,961 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 21:46:47,964 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions [2020-01-16 21:46:47,985 INFO L129 PetriNetUnfolder]: 5/24 cut-off events. [2020-01-16 21:46:47,985 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 21:46:47,986 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 21:46:47,987 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 84 [2020-01-16 21:46:47,988 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-01-16 21:46:48,078 INFO L206 etLargeBlockEncoding]: Checked pairs total: 27 [2020-01-16 21:46:48,079 INFO L214 etLargeBlockEncoding]: Total number of compositions: 4 [2020-01-16 21:46:48,079 INFO L162 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 171 [2020-01-16 21:46:48,091 INFO L129 PetriNetUnfolder]: 5/18 cut-off events. [2020-01-16 21:46:48,091 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 21:46:48,091 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:46:48,092 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:46:48,093 INFO L426 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:46:48,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:46:48,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1034130075, now seen corresponding path program 1 times [2020-01-16 21:46:48,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:46:48,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051451444] [2020-01-16 21:46:48,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:46:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:46:48,262 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 21:46:48,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051451444] [2020-01-16 21:46:48,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:46:48,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 21:46:48,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661714350] [2020-01-16 21:46:48,276 INFO L458 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-01-16 21:46:48,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:46:48,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-01-16 21:46:48,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-01-16 21:46:48,293 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 28 [2020-01-16 21:46:48,294 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions. Second operand 3 states. [2020-01-16 21:46:48,294 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:46:48,295 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 28 [2020-01-16 21:46:48,296 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:46:48,329 INFO L129 PetriNetUnfolder]: 3/17 cut-off events. [2020-01-16 21:46:48,330 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-01-16 21:46:48,330 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 21:46:48,331 INFO L123 encePairwiseOnDemand]: 26/28 looper letters, 2 selfloop transitions, 2 changer transitions [2020-01-16 21:46:48,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-01-16 21:46:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-01-16 21:46:48,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2020-01-16 21:46:48,346 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2020-01-16 21:46:48,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2020-01-16 21:46:48,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2020-01-16 21:46:48,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:46:48,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2020-01-16 21:46:48,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-01-16 21:46:48,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-01-16 21:46:48,359 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-01-16 21:46:48,361 INFO L174 Difference]: Start difference. First operand has 23 places, 20 transitions. Second operand 3 states and 76 transitions. [2020-01-16 21:46:48,362 INFO L199 Difference]: Finished difference. Result has 25 places, 16 transitions [2020-01-16 21:46:48,365 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 21:46:48,368 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 25 places, 16 transitions [2020-01-16 21:46:48,368 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 25 places, 16 transitions [2020-01-16 21:46:48,375 INFO L129 PetriNetUnfolder]: 3/17 cut-off events. [2020-01-16 21:46:48,376 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-01-16 21:46:48,376 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 21:46:48,378 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 4 of 25 places, 0 of 16 transitions, 1 of 66 flow. [2020-01-16 21:46:48,381 INFO L478 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions [2020-01-16 21:46:48,381 INFO L479 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-01-16 21:46:48,393 INFO L129 PetriNetUnfolder]: 3/15 cut-off events. [2020-01-16 21:46:48,393 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-01-16 21:46:48,393 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:46:48,394 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:46:48,394 INFO L426 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:46:48,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:46:48,395 INFO L82 PathProgramCache]: Analyzing trace with hash 949620875, now seen corresponding path program 1 times [2020-01-16 21:46:48,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:46:48,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250505119] [2020-01-16 21:46:48,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:46:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:46:48,420 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 21:46:48,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250505119] [2020-01-16 21:46:48,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:46:48,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 21:46:48,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655631068] [2020-01-16 21:46:48,423 INFO L458 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-01-16 21:46:48,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:46:48,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-01-16 21:46:48,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-01-16 21:46:48,427 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 28 [2020-01-16 21:46:48,428 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions. Second operand 3 states. [2020-01-16 21:46:48,428 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:46:48,428 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 28 [2020-01-16 21:46:48,428 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:46:48,447 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2020-01-16 21:46:48,447 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2020-01-16 21:46:48,448 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 21:46:48,448 INFO L123 encePairwiseOnDemand]: 25/28 looper letters, 1 selfloop transitions, 3 changer transitions [2020-01-16 21:46:48,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-01-16 21:46:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-01-16 21:46:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2020-01-16 21:46:48,455 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2020-01-16 21:46:48,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2020-01-16 21:46:48,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2020-01-16 21:46:48,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:46:48,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2020-01-16 21:46:48,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-01-16 21:46:48,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-01-16 21:46:48,460 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-01-16 21:46:48,461 INFO L174 Difference]: Start difference. First operand has 21 places, 16 transitions. Second operand 3 states and 76 transitions. [2020-01-16 21:46:48,461 INFO L199 Difference]: Finished difference. Result has 23 places, 11 transitions [2020-01-16 21:46:48,462 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 21:46:48,462 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 23 places, 11 transitions [2020-01-16 21:46:48,464 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 23 places, 11 transitions [2020-01-16 21:46:48,470 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2020-01-16 21:46:48,470 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-01-16 21:46:48,471 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 21:46:48,471 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 1 of 23 places, 0 of 11 transitions, 1 of 42 flow. [2020-01-16 21:46:48,472 INFO L478 AbstractCegarLoop]: Abstraction has has 22 places, 11 transitions [2020-01-16 21:46:48,476 INFO L479 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-01-16 21:46:48,482 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2020-01-16 21:46:48,483 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-01-16 21:46:48,483 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:46:48,490 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:46:48,490 INFO L426 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:46:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:46:48,491 INFO L82 PathProgramCache]: Analyzing trace with hash 949821755, now seen corresponding path program 1 times [2020-01-16 21:46:48,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:46:48,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108909854] [2020-01-16 21:46:48,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:46:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:46:48,629 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 21:46:48,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108909854] [2020-01-16 21:46:48,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:46:48,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-01-16 21:46:48,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671789453] [2020-01-16 21:46:48,631 INFO L458 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-01-16 21:46:48,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:46:48,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-01-16 21:46:48,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-01-16 21:46:48,633 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2020-01-16 21:46:48,633 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 11 transitions. Second operand 5 states. [2020-01-16 21:46:48,633 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:46:48,633 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2020-01-16 21:46:48,634 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:46:48,740 INFO L129 PetriNetUnfolder]: 5/31 cut-off events. [2020-01-16 21:46:48,740 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 21:46:48,741 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 21:46:48,741 INFO L123 encePairwiseOnDemand]: 23/28 looper letters, 6 selfloop transitions, 6 changer transitions [2020-01-16 21:46:48,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-01-16 21:46:48,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-01-16 21:46:48,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2020-01-16 21:46:48,744 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.7642857142857142 [2020-01-16 21:46:48,744 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 107 transitions. [2020-01-16 21:46:48,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 107 transitions. [2020-01-16 21:46:48,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:46:48,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 107 transitions. [2020-01-16 21:46:48,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-01-16 21:46:48,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-01-16 21:46:48,747 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-01-16 21:46:48,748 INFO L174 Difference]: Start difference. First operand has 22 places, 11 transitions. Second operand 5 states and 107 transitions. [2020-01-16 21:46:48,748 INFO L199 Difference]: Finished difference. Result has 29 places, 15 transitions [2020-01-16 21:46:48,748 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 21:46:48,749 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 29 places, 15 transitions [2020-01-16 21:46:48,749 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 29 places, 15 transitions [2020-01-16 21:46:48,755 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2020-01-16 21:46:48,755 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2020-01-16 21:46:48,756 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 21:46:48,756 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 0 of 29 places, 0 of 15 transitions, 0 of 74 flow. [2020-01-16 21:46:48,757 INFO L478 AbstractCegarLoop]: Abstraction has has 29 places, 15 transitions [2020-01-16 21:46:48,757 INFO L479 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-01-16 21:46:48,763 INFO L129 PetriNetUnfolder]: 2/22 cut-off events. [2020-01-16 21:46:48,763 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2020-01-16 21:46:48,763 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:46:48,763 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:46:48,763 INFO L426 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:46:48,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:46:48,764 INFO L82 PathProgramCache]: Analyzing trace with hash 958681169, now seen corresponding path program 2 times [2020-01-16 21:46:48,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:46:48,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481430629] [2020-01-16 21:46:48,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:46:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:46:48,897 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 21:46:48,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481430629] [2020-01-16 21:46:48,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:46:48,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-01-16 21:46:48,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293339705] [2020-01-16 21:46:48,898 INFO L458 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-01-16 21:46:48,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:46:48,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-01-16 21:46:48,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-01-16 21:46:48,905 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2020-01-16 21:46:48,905 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 15 transitions. Second operand 5 states. [2020-01-16 21:46:48,905 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:46:48,905 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2020-01-16 21:46:48,906 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:46:48,955 INFO L129 PetriNetUnfolder]: 5/36 cut-off events. [2020-01-16 21:46:48,955 INFO L130 PetriNetUnfolder]: For 50/53 co-relation queries the response was YES. [2020-01-16 21:46:48,956 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 21:46:48,956 INFO L123 encePairwiseOnDemand]: 23/28 looper letters, 7 selfloop transitions, 9 changer transitions [2020-01-16 21:46:48,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-01-16 21:46:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-01-16 21:46:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2020-01-16 21:46:48,960 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.7642857142857142 [2020-01-16 21:46:48,960 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 107 transitions. [2020-01-16 21:46:48,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 107 transitions. [2020-01-16 21:46:48,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:46:48,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 107 transitions. [2020-01-16 21:46:48,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-01-16 21:46:48,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-01-16 21:46:48,962 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-01-16 21:46:48,962 INFO L174 Difference]: Start difference. First operand has 29 places, 15 transitions. Second operand 5 states and 107 transitions. [2020-01-16 21:46:48,963 INFO L199 Difference]: Finished difference. Result has 36 places, 19 transitions [2020-01-16 21:46:48,963 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 21:46:48,963 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 36 places, 19 transitions [2020-01-16 21:46:48,964 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 36 places, 19 transitions [2020-01-16 21:46:48,978 INFO L129 PetriNetUnfolder]: 3/31 cut-off events. [2020-01-16 21:46:48,978 INFO L130 PetriNetUnfolder]: For 63/65 co-relation queries the response was YES. [2020-01-16 21:46:48,979 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 21:46:48,979 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 1 of 36 places, 0 of 19 transitions, 4 of 134 flow. [2020-01-16 21:46:48,980 INFO L478 AbstractCegarLoop]: Abstraction has has 35 places, 19 transitions [2020-01-16 21:46:48,980 INFO L479 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-01-16 21:46:48,989 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2020-01-16 21:46:48,990 INFO L130 PetriNetUnfolder]: For 63/65 co-relation queries the response was YES. [2020-01-16 21:46:48,990 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:46:48,991 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:46:48,991 INFO L426 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:46:48,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:46:48,991 INFO L82 PathProgramCache]: Analyzing trace with hash 988252145, now seen corresponding path program 3 times [2020-01-16 21:46:48,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:46:48,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953944220] [2020-01-16 21:46:48,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:46:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:46:49,130 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 21:46:49,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953944220] [2020-01-16 21:46:49,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:46:49,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-01-16 21:46:49,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820509982] [2020-01-16 21:46:49,132 INFO L458 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-01-16 21:46:49,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:46:49,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-01-16 21:46:49,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-01-16 21:46:49,133 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2020-01-16 21:46:49,134 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 19 transitions. Second operand 5 states. [2020-01-16 21:46:49,134 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:46:49,134 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2020-01-16 21:46:49,134 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:46:49,184 INFO L129 PetriNetUnfolder]: 5/44 cut-off events. [2020-01-16 21:46:49,184 INFO L130 PetriNetUnfolder]: For 152/157 co-relation queries the response was YES. [2020-01-16 21:46:49,185 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 21:46:49,186 INFO L123 encePairwiseOnDemand]: 23/28 looper letters, 8 selfloop transitions, 11 changer transitions [2020-01-16 21:46:49,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-01-16 21:46:49,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-01-16 21:46:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2020-01-16 21:46:49,188 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.7642857142857142 [2020-01-16 21:46:49,188 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 107 transitions. [2020-01-16 21:46:49,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 107 transitions. [2020-01-16 21:46:49,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:46:49,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 107 transitions. [2020-01-16 21:46:49,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-01-16 21:46:49,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-01-16 21:46:49,190 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-01-16 21:46:49,190 INFO L174 Difference]: Start difference. First operand has 35 places, 19 transitions. Second operand 5 states and 107 transitions. [2020-01-16 21:46:49,191 INFO L199 Difference]: Finished difference. Result has 42 places, 23 transitions [2020-01-16 21:46:49,191 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 21:46:49,191 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 42 places, 23 transitions [2020-01-16 21:46:49,192 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 42 places, 23 transitions [2020-01-16 21:46:49,200 INFO L129 PetriNetUnfolder]: 5/44 cut-off events. [2020-01-16 21:46:49,201 INFO L130 PetriNetUnfolder]: For 208/209 co-relation queries the response was YES. [2020-01-16 21:46:49,201 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 21:46:49,202 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 1 of 42 places, 0 of 23 transitions, 6 of 209 flow. [2020-01-16 21:46:49,202 INFO L478 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions [2020-01-16 21:46:49,202 INFO L479 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-01-16 21:46:49,210 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2020-01-16 21:46:49,210 INFO L130 PetriNetUnfolder]: For 208/209 co-relation queries the response was YES. [2020-01-16 21:46:49,210 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:46:49,211 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:46:49,211 INFO L426 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:46:49,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:46:49,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1819421045, now seen corresponding path program 4 times [2020-01-16 21:46:49,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:46:49,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473710615] [2020-01-16 21:46:49,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:46:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:46:49,328 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 21:46:49,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473710615] [2020-01-16 21:46:49,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:46:49,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-01-16 21:46:49,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904908774] [2020-01-16 21:46:49,331 INFO L458 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-01-16 21:46:49,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:46:49,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-01-16 21:46:49,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-01-16 21:46:49,332 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2020-01-16 21:46:49,333 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions. Second operand 5 states. [2020-01-16 21:46:49,333 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:46:49,333 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2020-01-16 21:46:49,333 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:46:49,408 INFO L129 PetriNetUnfolder]: 5/43 cut-off events. [2020-01-16 21:46:49,408 INFO L130 PetriNetUnfolder]: For 281/289 co-relation queries the response was YES. [2020-01-16 21:46:49,409 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 21:46:49,410 INFO L123 encePairwiseOnDemand]: 23/28 looper letters, 8 selfloop transitions, 14 changer transitions [2020-01-16 21:46:49,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-01-16 21:46:49,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-01-16 21:46:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2020-01-16 21:46:49,415 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.7642857142857142 [2020-01-16 21:46:49,415 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 107 transitions. [2020-01-16 21:46:49,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 107 transitions. [2020-01-16 21:46:49,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:46:49,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 107 transitions. [2020-01-16 21:46:49,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-01-16 21:46:49,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-01-16 21:46:49,419 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-01-16 21:46:49,420 INFO L174 Difference]: Start difference. First operand has 41 places, 23 transitions. Second operand 5 states and 107 transitions. [2020-01-16 21:46:49,420 INFO L199 Difference]: Finished difference. Result has 48 places, 25 transitions [2020-01-16 21:46:49,421 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 21:46:49,421 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 48 places, 25 transitions [2020-01-16 21:46:49,421 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 48 places, 25 transitions [2020-01-16 21:46:49,438 INFO L129 PetriNetUnfolder]: 5/43 cut-off events. [2020-01-16 21:46:49,438 INFO L130 PetriNetUnfolder]: For 358/362 co-relation queries the response was YES. [2020-01-16 21:46:49,439 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 21:46:49,440 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 1 of 48 places, 0 of 25 transitions, 6 of 277 flow. [2020-01-16 21:46:49,440 INFO L478 AbstractCegarLoop]: Abstraction has has 47 places, 25 transitions [2020-01-16 21:46:49,440 INFO L479 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-01-16 21:46:49,453 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2020-01-16 21:46:49,453 INFO L130 PetriNetUnfolder]: For 358/362 co-relation queries the response was YES. [2020-01-16 21:46:49,453 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:46:49,454 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:46:49,454 INFO L426 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:46:49,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:46:49,455 INFO L82 PathProgramCache]: Analyzing trace with hash 940085819, now seen corresponding path program 5 times [2020-01-16 21:46:49,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:46:49,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024880371] [2020-01-16 21:46:49,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:46:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:46:49,596 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 21:46:49,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024880371] [2020-01-16 21:46:49,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:46:49,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-01-16 21:46:49,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298924352] [2020-01-16 21:46:49,599 INFO L458 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-01-16 21:46:49,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:46:49,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-01-16 21:46:49,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-01-16 21:46:49,600 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2020-01-16 21:46:49,601 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 25 transitions. Second operand 5 states. [2020-01-16 21:46:49,601 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:46:49,601 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2020-01-16 21:46:49,601 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:46:49,651 INFO L129 PetriNetUnfolder]: 5/42 cut-off events. [2020-01-16 21:46:49,651 INFO L130 PetriNetUnfolder]: For 460/475 co-relation queries the response was YES. [2020-01-16 21:46:49,652 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 21:46:49,652 INFO L123 encePairwiseOnDemand]: 23/28 looper letters, 8 selfloop transitions, 14 changer transitions [2020-01-16 21:46:49,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-01-16 21:46:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-01-16 21:46:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2020-01-16 21:46:49,654 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.7571428571428571 [2020-01-16 21:46:49,654 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 106 transitions. [2020-01-16 21:46:49,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 106 transitions. [2020-01-16 21:46:49,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:46:49,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 106 transitions. [2020-01-16 21:46:49,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-01-16 21:46:49,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-01-16 21:46:49,656 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-01-16 21:46:49,656 INFO L174 Difference]: Start difference. First operand has 47 places, 25 transitions. Second operand 5 states and 106 transitions. [2020-01-16 21:46:49,657 INFO L199 Difference]: Finished difference. Result has 53 places, 27 transitions [2020-01-16 21:46:49,657 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 21:46:49,657 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 53 places, 27 transitions [2020-01-16 21:46:49,657 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 27 transitions [2020-01-16 21:46:49,665 INFO L129 PetriNetUnfolder]: 5/42 cut-off events. [2020-01-16 21:46:49,665 INFO L130 PetriNetUnfolder]: For 554/565 co-relation queries the response was YES. [2020-01-16 21:46:49,666 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 21:46:49,667 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 1 of 53 places, 0 of 27 transitions, 6 of 345 flow. [2020-01-16 21:46:49,667 INFO L478 AbstractCegarLoop]: Abstraction has has 52 places, 27 transitions [2020-01-16 21:46:49,667 INFO L479 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-01-16 21:46:49,675 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2020-01-16 21:46:49,675 INFO L130 PetriNetUnfolder]: For 510/512 co-relation queries the response was YES. [2020-01-16 21:46:49,676 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:46:49,676 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:46:49,676 INFO L426 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:46:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:46:49,677 INFO L82 PathProgramCache]: Analyzing trace with hash -630022353, now seen corresponding path program 6 times [2020-01-16 21:46:49,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:46:49,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771509797] [2020-01-16 21:46:49,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:46:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:46:49,781 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 21:46:49,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771509797] [2020-01-16 21:46:49,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:46:49,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-01-16 21:46:49,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371105682] [2020-01-16 21:46:49,782 INFO L458 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-01-16 21:46:49,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:46:49,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-01-16 21:46:49,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-01-16 21:46:49,786 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2020-01-16 21:46:49,787 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 27 transitions. Second operand 5 states. [2020-01-16 21:46:49,787 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:46:49,787 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2020-01-16 21:46:49,787 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:46:49,835 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2020-01-16 21:46:49,836 INFO L130 PetriNetUnfolder]: For 691/721 co-relation queries the response was YES. [2020-01-16 21:46:49,836 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 21:46:49,837 INFO L123 encePairwiseOnDemand]: 23/28 looper letters, 7 selfloop transitions, 15 changer transitions [2020-01-16 21:46:49,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-01-16 21:46:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-01-16 21:46:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2020-01-16 21:46:49,838 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.75 [2020-01-16 21:46:49,838 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 105 transitions. [2020-01-16 21:46:49,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 105 transitions. [2020-01-16 21:46:49,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:46:49,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 105 transitions. [2020-01-16 21:46:49,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-01-16 21:46:49,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-01-16 21:46:49,841 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-01-16 21:46:49,841 INFO L174 Difference]: Start difference. First operand has 52 places, 27 transitions. Second operand 5 states and 105 transitions. [2020-01-16 21:46:49,842 INFO L199 Difference]: Finished difference. Result has 57 places, 27 transitions [2020-01-16 21:46:49,842 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 21:46:49,843 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 57 places, 27 transitions [2020-01-16 21:46:49,843 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 57 places, 27 transitions [2020-01-16 21:46:49,849 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2020-01-16 21:46:49,849 INFO L130 PetriNetUnfolder]: For 615/619 co-relation queries the response was YES. [2020-01-16 21:46:49,850 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 21:46:49,852 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 2 of 57 places, 0 of 27 transitions, 6 of 380 flow. [2020-01-16 21:46:49,853 INFO L478 AbstractCegarLoop]: Abstraction has has 55 places, 27 transitions [2020-01-16 21:46:49,853 INFO L479 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-01-16 21:46:49,859 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2020-01-16 21:46:49,860 INFO L130 PetriNetUnfolder]: For 641/651 co-relation queries the response was YES. [2020-01-16 21:46:49,864 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.01 09:46:49 BasicIcfg [2020-01-16 21:46:49,864 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-01-16 21:46:49,871 INFO L168 Benchmark]: Toolchain (without parser) took 2408.56 ms. Allocated memory was 135.3 MB in the beginning and 198.2 MB in the end (delta: 62.9 MB). Free memory was 117.2 MB in the beginning and 132.8 MB in the end (delta: -15.6 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. [2020-01-16 21:46:49,874 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.45 ms. Allocated memory is still 135.3 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-01-16 21:46:49,879 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.46 ms. Allocated memory is still 135.3 MB. Free memory was 117.0 MB in the beginning and 115.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-01-16 21:46:49,880 INFO L168 Benchmark]: Boogie Preprocessor took 17.92 ms. Allocated memory is still 135.3 MB. Free memory was 115.4 MB in the beginning and 114.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-01-16 21:46:49,881 INFO L168 Benchmark]: RCFGBuilder took 230.08 ms. Allocated memory is still 135.3 MB. Free memory was 114.2 MB in the beginning and 104.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-01-16 21:46:49,883 INFO L168 Benchmark]: TraceAbstraction took 2121.61 ms. Allocated memory was 135.3 MB in the beginning and 198.2 MB in the end (delta: 62.9 MB). Free memory was 103.8 MB in the beginning and 132.8 MB in the end (delta: -29.0 MB). Peak memory consumption was 33.9 MB. Max. memory is 7.1 GB. [2020-01-16 21:46:49,895 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 0.45 ms. Allocated memory is still 135.3 MB. Free memory was 118.4 MB in the beginning and 118.2 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 34.46 ms. Allocated memory is still 135.3 MB. Free memory was 117.0 MB in the beginning and 115.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 17.92 ms. Allocated memory is still 135.3 MB. Free memory was 115.4 MB in the beginning and 114.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 230.08 ms. Allocated memory is still 135.3 MB. Free memory was 114.2 MB in the beginning and 104.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2121.61 ms. Allocated memory was 135.3 MB in the beginning and 198.2 MB in the end (delta: 62.9 MB). Free memory was 103.8 MB in the beginning and 132.8 MB in the end (delta: -29.0 MB). Peak memory consumption was 33.9 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: 1.9s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 38 SDtfs, 43 SDslu, 20 SDs, 0 SdLazy, 74 SolverSat, 16 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=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...