/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_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-abd8500 [2020-01-16 21:46:42,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-01-16 21:46:42,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-01-16 21:46:42,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-01-16 21:46:42,180 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 21:46:42,199 INFO L113 SettingsManager]: Loading preferences was successful [2020-01-16 21:46:42,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-01-16 21:46:42,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-01-16 21:46:42,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-01-16 21:46:42,201 INFO L138 SettingsManager]: * Use SBE=true [2020-01-16 21:46:42,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-01-16 21:46:42,202 INFO L138 SettingsManager]: * sizeof long=4 [2020-01-16 21:46:42,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-01-16 21:46:42,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-01-16 21:46:42,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-01-16 21:46:42,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-01-16 21:46:42,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-01-16 21:46:42,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-01-16 21:46:42,204 INFO L138 SettingsManager]: * sizeof long double=12 [2020-01-16 21:46:42,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-01-16 21:46:42,204 INFO L138 SettingsManager]: * Use constant arrays=true [2020-01-16 21:46:42,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-01-16 21:46:42,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-01-16 21:46:42,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-01-16 21:46:42,205 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-01-16 21:46:42,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-01-16 21:46:42,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-01-16 21:46:42,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-01-16 21:46:42,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-01-16 21:46:42,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-01-16 21:46:42,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-01-16 21:46:42,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-01-16 21:46:42,207 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-01-16 21:46:42,207 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-01-16 21:46:42,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-01-16 21:46:42,524 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-01-16 21:46:42,539 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-01-16 21:46:42,542 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-01-16 21:46:42,544 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-01-16 21:46:42,544 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-01-16 21:46:42,545 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl [2020-01-16 21:46:42,546 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl' [2020-01-16 21:46:42,581 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-01-16 21:46:42,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-01-16 21:46:42,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-01-16 21:46:42,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-01-16 21:46:42,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-01-16 21:46:42,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:46:42" (1/1) ... [2020-01-16 21:46:42,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:46:42" (1/1) ... [2020-01-16 21:46:42,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-01-16 21:46:42,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-01-16 21:46:42,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-01-16 21:46:42,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-01-16 21:46:42,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:46:42" (1/1) ... [2020-01-16 21:46:42,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:46:42" (1/1) ... [2020-01-16 21:46:42,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:46:42" (1/1) ... [2020-01-16 21:46:42,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:46:42" (1/1) ... [2020-01-16 21:46:42,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:46:42" (1/1) ... [2020-01-16 21:46:42,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:46:42" (1/1) ... [2020-01-16 21:46:42,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:46:42" (1/1) ... [2020-01-16 21:46:42,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-01-16 21:46:42,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-01-16 21:46:42,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-01-16 21:46:42,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-01-16 21:46:42,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:46:42" (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 21:46:42,724 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-01-16 21:46:42,725 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-01-16 21:46:42,726 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-01-16 21:46:42,727 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-01-16 21:46:42,727 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-01-16 21:46:42,727 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-01-16 21:46:42,727 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-01-16 21:46:42,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-01-16 21:46:42,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-01-16 21:46:42,729 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 21:46:42,838 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-01-16 21:46:42,839 INFO L287 CfgBuilder]: Removed 0 assume(true) statements. [2020-01-16 21:46:42,840 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.01 09:46:42 BoogieIcfgContainer [2020-01-16 21:46:42,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-01-16 21:46:42,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-01-16 21:46:42,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-01-16 21:46:42,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-01-16 21:46:42,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:46:42" (1/2) ... [2020-01-16 21:46:42,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e544cc2 and model type example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.01 09:46:42, skipping insertion in model container [2020-01-16 21:46:42,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.01 09:46:42" (2/2) ... [2020-01-16 21:46:42,848 INFO L109 eAbstractionObserver]: Analyzing ICFG example_2.bpl [2020-01-16 21:46:42,858 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-01-16 21:46:42,865 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-01-16 21:46:42,866 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-01-16 21:46:42,955 INFO L250 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-01-16 21:46:42,996 INFO L374 AbstractCegarLoop]: Interprodecural is true [2020-01-16 21:46:42,996 INFO L375 AbstractCegarLoop]: Hoare is false [2020-01-16 21:46:42,996 INFO L376 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-01-16 21:46:42,996 INFO L377 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-01-16 21:46:42,996 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-01-16 21:46:42,996 INFO L379 AbstractCegarLoop]: Difference is false [2020-01-16 21:46:42,997 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-01-16 21:46:42,997 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-01-16 21:46:43,010 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 15 transitions [2020-01-16 21:46:43,012 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions [2020-01-16 21:46:43,038 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2020-01-16 21:46:43,038 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-01-16 21:46:43,043 INFO L76 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 13 events. 1/13 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs. 0/12 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2020-01-16 21:46:43,045 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions [2020-01-16 21:46:43,051 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2020-01-16 21:46:43,052 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-01-16 21:46:43,052 INFO L76 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 13 events. 1/13 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs. 0/12 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2020-01-16 21:46:43,053 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 20 [2020-01-16 21:46:43,054 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-01-16 21:46:43,209 INFO L206 etLargeBlockEncoding]: Checked pairs total: 7 [2020-01-16 21:46:43,210 INFO L214 etLargeBlockEncoding]: Total number of compositions: 3 [2020-01-16 21:46:43,210 INFO L162 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 204 [2020-01-16 21:46:43,218 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2020-01-16 21:46:43,218 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-01-16 21:46:43,218 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:46:43,219 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:46:43,220 INFO L426 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:46:43,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:46:43,226 INFO L82 PathProgramCache]: Analyzing trace with hash 798353380, now seen corresponding path program 1 times [2020-01-16 21:46:43,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:46:43,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883901633] [2020-01-16 21:46:43,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:46:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:46:43,450 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 21:46:43,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883901633] [2020-01-16 21:46:43,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:46:43,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 21:46:43,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357470490] [2020-01-16 21:46:43,462 INFO L458 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-01-16 21:46:43,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:46:43,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-01-16 21:46:43,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-01-16 21:46:43,477 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 18 [2020-01-16 21:46:43,478 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 12 transitions. Second operand 4 states. [2020-01-16 21:46:43,479 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:46:43,479 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 18 [2020-01-16 21:46:43,480 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:46:43,560 INFO L129 PetriNetUnfolder]: 3/17 cut-off events. [2020-01-16 21:46:43,564 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2020-01-16 21:46:43,564 INFO L76 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 17 events. 3/17 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs. 0/15 useless extension candidates. Maximal degree in co-relation 15. Up to 5 conditions per place. [2020-01-16 21:46:43,565 INFO L123 encePairwiseOnDemand]: 14/18 looper letters, 3 selfloop transitions, 4 changer transitions [2020-01-16 21:46:43,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-01-16 21:46:43,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-01-16 21:46:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2020-01-16 21:46:43,582 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2020-01-16 21:46:43,583 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 51 transitions. [2020-01-16 21:46:43,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 51 transitions. [2020-01-16 21:46:43,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:46:43,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 51 transitions. [2020-01-16 21:46:43,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-01-16 21:46:43,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-01-16 21:46:43,596 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-01-16 21:46:43,598 INFO L174 Difference]: Start difference. First operand has 16 places, 12 transitions. Second operand 4 states and 51 transitions. [2020-01-16 21:46:43,598 INFO L199 Difference]: Finished difference. Result has 21 places, 12 transitions [2020-01-16 21:46:43,601 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=57, PETRI_PLACES=21, PETRI_TRANSITIONS=12} [2020-01-16 21:46:43,603 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 21 places, 12 transitions [2020-01-16 21:46:43,603 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 21 places, 12 transitions [2020-01-16 21:46:43,610 INFO L129 PetriNetUnfolder]: 3/17 cut-off events. [2020-01-16 21:46:43,611 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 21:46:43,611 INFO L76 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 17 events. 3/17 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs. 0/17 useless extension candidates. Maximal degree in co-relation 22. Up to 5 conditions per place. [2020-01-16 21:46:43,613 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 3 of 21 places, 0 of 12 transitions, 2 of 57 flow. [2020-01-16 21:46:43,618 INFO L478 AbstractCegarLoop]: Abstraction has has 18 places, 12 transitions [2020-01-16 21:46:43,618 INFO L479 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-01-16 21:46:43,630 INFO L129 PetriNetUnfolder]: 3/15 cut-off events. [2020-01-16 21:46:43,630 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 21:46:43,631 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:46:43,632 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:46:43,633 INFO L426 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:46:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:46:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash 993964930, now seen corresponding path program 2 times [2020-01-16 21:46:43,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:46:43,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734079620] [2020-01-16 21:46:43,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:46:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:46:43,699 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 21:46:43,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734079620] [2020-01-16 21:46:43,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:46:43,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 21:46:43,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704872952] [2020-01-16 21:46:43,701 INFO L458 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-01-16 21:46:43,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:46:43,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-01-16 21:46:43,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-01-16 21:46:43,703 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 18 [2020-01-16 21:46:43,704 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 12 transitions. Second operand 4 states. [2020-01-16 21:46:43,704 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:46:43,704 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 18 [2020-01-16 21:46:43,704 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:46:43,747 INFO L129 PetriNetUnfolder]: 3/16 cut-off events. [2020-01-16 21:46:43,747 INFO L130 PetriNetUnfolder]: For 21/23 co-relation queries the response was YES. [2020-01-16 21:46:43,748 INFO L76 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 3/16 cut-off events. For 21/23 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs. 1/17 useless extension candidates. Maximal degree in co-relation 25. Up to 5 conditions per place. [2020-01-16 21:46:43,749 INFO L123 encePairwiseOnDemand]: 14/18 looper letters, 2 selfloop transitions, 5 changer transitions [2020-01-16 21:46:43,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-01-16 21:46:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-01-16 21:46:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 50 transitions. [2020-01-16 21:46:43,752 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2020-01-16 21:46:43,752 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 50 transitions. [2020-01-16 21:46:43,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 50 transitions. [2020-01-16 21:46:43,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:46:43,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 50 transitions. [2020-01-16 21:46:43,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-01-16 21:46:43,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-01-16 21:46:43,755 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-01-16 21:46:43,755 INFO L174 Difference]: Start difference. First operand has 18 places, 12 transitions. Second operand 4 states and 50 transitions. [2020-01-16 21:46:43,756 INFO L199 Difference]: Finished difference. Result has 22 places, 12 transitions [2020-01-16 21:46:43,757 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=22, PETRI_TRANSITIONS=12} [2020-01-16 21:46:43,758 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 22 places, 12 transitions [2020-01-16 21:46:43,758 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 22 places, 12 transitions [2020-01-16 21:46:43,769 INFO L129 PetriNetUnfolder]: 3/16 cut-off events. [2020-01-16 21:46:43,769 INFO L130 PetriNetUnfolder]: For 23/25 co-relation queries the response was YES. [2020-01-16 21:46:43,772 INFO L76 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 16 events. 3/16 cut-off events. For 23/25 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs. 0/16 useless extension candidates. Maximal degree in co-relation 26. Up to 5 conditions per place. [2020-01-16 21:46:43,772 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 2 of 22 places, 0 of 12 transitions, 2 of 70 flow. [2020-01-16 21:46:43,773 INFO L478 AbstractCegarLoop]: Abstraction has has 20 places, 12 transitions [2020-01-16 21:46:43,773 INFO L479 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-01-16 21:46:43,787 INFO L129 PetriNetUnfolder]: 3/16 cut-off events. [2020-01-16 21:46:43,787 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2020-01-16 21:46:43,795 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.01 09:46:43 BasicIcfg [2020-01-16 21:46:43,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-01-16 21:46:43,800 INFO L168 Benchmark]: Toolchain (without parser) took 1216.28 ms. Allocated memory was 137.9 MB in the beginning and 168.3 MB in the end (delta: 30.4 MB). Free memory was 119.8 MB in the beginning and 145.3 MB in the end (delta: -25.5 MB). Peak memory consumption was 65.4 MB. Max. memory is 7.1 GB. [2020-01-16 21:46:43,801 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.56 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-01-16 21:46:43,809 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.68 ms. Allocated memory is still 137.9 MB. Free memory was 119.8 MB in the beginning and 118.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-01-16 21:46:43,810 INFO L168 Benchmark]: Boogie Preprocessor took 22.23 ms. Allocated memory is still 137.9 MB. Free memory was 118.1 MB in the beginning and 117.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-01-16 21:46:43,813 INFO L168 Benchmark]: RCFGBuilder took 197.14 ms. Allocated memory is still 137.9 MB. Free memory was 116.8 MB in the beginning and 107.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-01-16 21:46:43,814 INFO L168 Benchmark]: TraceAbstraction took 954.31 ms. Allocated memory was 137.9 MB in the beginning and 168.3 MB in the end (delta: 30.4 MB). Free memory was 107.3 MB in the beginning and 145.3 MB in the end (delta: -38.0 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2020-01-16 21:46:43,821 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 0.56 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 36.68 ms. Allocated memory is still 137.9 MB. Free memory was 119.8 MB in the beginning and 118.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.23 ms. Allocated memory is still 137.9 MB. Free memory was 118.1 MB in the beginning and 117.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 197.14 ms. Allocated memory is still 137.9 MB. Free memory was 116.8 MB in the beginning and 107.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 954.31 ms. Allocated memory was 137.9 MB in the beginning and 168.3 MB in the end (delta: 30.4 MB). Free memory was 107.3 MB in the beginning and 145.3 MB in the end (delta: -38.0 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.2s, 20 ProgramPointsBefore, 16 ProgramPointsAfterwards, 15 TransitionsBefore, 12 TransitionsAfterwards, 20 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 VarBasedMoverChecksPositive, 0 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 7 CheckedPairsTotal, 3 TotalNumberOfCompositions - PositiveResult [Line: 17]: 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 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. Result: SAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, HoareTripleCheckerStatistics: 6 SDtfs, 7 SDslu, 2 SDs, 0 SdLazy, 9 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=2, 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, 2 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 420 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...