/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-MCR.epf -i ../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-abd8500 [2020-01-16 22:43:19,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-01-16 22:43:19,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-01-16 22:43:19,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-01-16 22:43:19,307 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-MCR.epf [2020-01-16 22:43:19,329 INFO L113 SettingsManager]: Loading preferences was successful [2020-01-16 22:43:19,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-01-16 22:43:19,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-01-16 22:43:19,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-01-16 22:43:19,333 INFO L138 SettingsManager]: * Use SBE=true [2020-01-16 22:43:19,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-01-16 22:43:19,333 INFO L138 SettingsManager]: * sizeof long=4 [2020-01-16 22:43:19,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-01-16 22:43:19,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-01-16 22:43:19,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-01-16 22:43:19,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-01-16 22:43:19,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-01-16 22:43:19,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-01-16 22:43:19,336 INFO L138 SettingsManager]: * sizeof long double=12 [2020-01-16 22:43:19,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-01-16 22:43:19,336 INFO L138 SettingsManager]: * Use constant arrays=true [2020-01-16 22:43:19,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-01-16 22:43:19,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-01-16 22:43:19,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-01-16 22:43:19,337 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-01-16 22:43:19,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-01-16 22:43:19,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-01-16 22:43:19,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-01-16 22:43:19,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-01-16 22:43:19,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-01-16 22:43:19,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-01-16 22:43:19,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-01-16 22:43:19,339 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-01-16 22:43:19,339 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-01-16 22:43:19,339 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-01-16 22:43:19,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-01-16 22:43:19,645 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-01-16 22:43:19,664 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-01-16 22:43:19,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-01-16 22:43:19,667 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-01-16 22:43:19,668 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-01-16 22:43:19,669 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl [2020-01-16 22:43:19,669 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl' [2020-01-16 22:43:19,700 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-01-16 22:43:19,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-01-16 22:43:19,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-01-16 22:43:19,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-01-16 22:43:19,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-01-16 22:43:19,720 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 10:43:19" (1/1) ... [2020-01-16 22:43:19,729 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 10:43:19" (1/1) ... [2020-01-16 22:43:19,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-01-16 22:43:19,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-01-16 22:43:19,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-01-16 22:43:19,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-01-16 22:43:19,749 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 10:43:19" (1/1) ... [2020-01-16 22:43:19,750 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 10:43:19" (1/1) ... [2020-01-16 22:43:19,750 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 10:43:19" (1/1) ... [2020-01-16 22:43:19,750 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 10:43:19" (1/1) ... [2020-01-16 22:43:19,753 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 10:43:19" (1/1) ... [2020-01-16 22:43:19,754 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 10:43:19" (1/1) ... [2020-01-16 22:43:19,755 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 10:43:19" (1/1) ... [2020-01-16 22:43:19,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-01-16 22:43:19,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-01-16 22:43:19,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-01-16 22:43:19,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-01-16 22:43:19,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 10:43:19" (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 22:43:19,825 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-01-16 22:43:19,827 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-01-16 22:43:19,827 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-01-16 22:43:19,828 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2020-01-16 22:43:19,828 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2020-01-16 22:43:19,828 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2020-01-16 22:43:19,828 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-01-16 22:43:19,828 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-01-16 22:43:19,829 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-01-16 22:43:19,829 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-01-16 22:43:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-01-16 22:43:19,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-01-16 22:43:19,830 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 22:43:19,976 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-01-16 22:43:19,977 INFO L287 CfgBuilder]: Removed 0 assume(true) statements. [2020-01-16 22:43:19,978 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.01 10:43:19 BoogieIcfgContainer [2020-01-16 22:43:19,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-01-16 22:43:19,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-01-16 22:43:19,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-01-16 22:43:19,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-01-16 22:43:19,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 10:43:19" (1/2) ... [2020-01-16 22:43:19,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347923e8 and model type example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.01 10:43:19, skipping insertion in model container [2020-01-16 22:43:19,986 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 10:43:19" (2/2) ... [2020-01-16 22:43:19,987 INFO L109 eAbstractionObserver]: Analyzing ICFG example_3.bpl [2020-01-16 22:43:19,997 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-01-16 22:43:20,004 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-01-16 22:43:20,006 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-01-16 22:43:20,101 INFO L250 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-01-16 22:43:20,123 INFO L374 AbstractCegarLoop]: Interprodecural is true [2020-01-16 22:43:20,123 INFO L375 AbstractCegarLoop]: Hoare is false [2020-01-16 22:43:20,123 INFO L376 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-01-16 22:43:20,123 INFO L377 AbstractCegarLoop]: Backedges is MCR [2020-01-16 22:43:20,123 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-01-16 22:43:20,123 INFO L379 AbstractCegarLoop]: Difference is false [2020-01-16 22:43:20,127 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-01-16 22:43:20,127 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-01-16 22:43:20,140 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 24 transitions [2020-01-16 22:43:20,142 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions [2020-01-16 22:43:20,177 INFO L129 PetriNetUnfolder]: 5/24 cut-off events. [2020-01-16 22:43:20,177 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 22:43:20,183 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 22:43:20,185 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions [2020-01-16 22:43:20,197 INFO L129 PetriNetUnfolder]: 5/24 cut-off events. [2020-01-16 22:43:20,197 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 22:43:20,198 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 22:43:20,199 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 84 [2020-01-16 22:43:20,200 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-01-16 22:43:20,310 INFO L206 etLargeBlockEncoding]: Checked pairs total: 27 [2020-01-16 22:43:20,311 INFO L214 etLargeBlockEncoding]: Total number of compositions: 4 [2020-01-16 22:43:20,311 INFO L162 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 175 [2020-01-16 22:43:20,325 INFO L129 PetriNetUnfolder]: 5/18 cut-off events. [2020-01-16 22:43:20,325 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 22:43:20,325 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 22:43:20,326 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 22:43:20,326 INFO L426 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 22:43:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 22:43:20,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1034130075, now seen corresponding path program 1 times [2020-01-16 22:43:20,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 22:43:20,341 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136947730] [2020-01-16 22:43:20,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 22:43:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 22:43:20,480 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 22:43:20,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136947730] [2020-01-16 22:43:20,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 22:43:20,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 22:43:20,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1203140494] [2020-01-16 22:43:20,484 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-01-16 22:43:20,495 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-01-16 22:43:20,519 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 23 states and 37 transitions. [2020-01-16 22:43:20,519 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-01-16 22:43:20,532 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2020-01-16 22:43:20,533 INFO L458 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-01-16 22:43:20,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 22:43:20,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-01-16 22:43:20,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-01-16 22:43:20,551 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 28 [2020-01-16 22:43:20,552 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions. Second operand 3 states. [2020-01-16 22:43:20,553 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 22:43:20,553 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 28 [2020-01-16 22:43:20,555 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 22:43:20,576 INFO L129 PetriNetUnfolder]: 3/17 cut-off events. [2020-01-16 22:43:20,576 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-01-16 22:43:20,577 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 22:43:20,578 INFO L123 encePairwiseOnDemand]: 26/28 looper letters, 2 selfloop transitions, 2 changer transitions [2020-01-16 22:43:20,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-01-16 22:43:20,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-01-16 22:43:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2020-01-16 22:43:20,586 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2020-01-16 22:43:20,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2020-01-16 22:43:20,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2020-01-16 22:43:20,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 22:43:20,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2020-01-16 22:43:20,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-01-16 22:43:20,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-01-16 22:43:20,599 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-01-16 22:43:20,601 INFO L174 Difference]: Start difference. First operand has 23 places, 20 transitions. Second operand 3 states and 76 transitions. [2020-01-16 22:43:20,601 INFO L199 Difference]: Finished difference. Result has 25 places, 16 transitions [2020-01-16 22:43:20,603 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 22:43:20,605 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 25 places, 16 transitions [2020-01-16 22:43:20,605 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 25 places, 16 transitions [2020-01-16 22:43:20,615 INFO L129 PetriNetUnfolder]: 3/17 cut-off events. [2020-01-16 22:43:20,615 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-01-16 22:43:20,616 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 22:43:20,618 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 4 of 25 places, 0 of 16 transitions, 1 of 66 flow. [2020-01-16 22:43:20,619 INFO L478 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions [2020-01-16 22:43:20,619 INFO L479 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-01-16 22:43:20,625 INFO L129 PetriNetUnfolder]: 3/15 cut-off events. [2020-01-16 22:43:20,626 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-01-16 22:43:20,626 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 22:43:20,626 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 22:43:20,627 INFO L426 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 22:43:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 22:43:20,627 INFO L82 PathProgramCache]: Analyzing trace with hash 949620875, now seen corresponding path program 1 times [2020-01-16 22:43:20,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 22:43:20,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290494435] [2020-01-16 22:43:20,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 22:43:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 22:43:20,659 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 22:43:20,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290494435] [2020-01-16 22:43:20,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 22:43:20,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 22:43:20,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1596111629] [2020-01-16 22:43:20,661 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-01-16 22:43:20,662 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-01-16 22:43:20,665 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 23 states and 37 transitions. [2020-01-16 22:43:20,665 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-01-16 22:43:20,666 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2020-01-16 22:43:20,667 INFO L458 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-01-16 22:43:20,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 22:43:20,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-01-16 22:43:20,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-01-16 22:43:20,669 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 28 [2020-01-16 22:43:20,670 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions. Second operand 3 states. [2020-01-16 22:43:20,670 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 22:43:20,670 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 28 [2020-01-16 22:43:20,670 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 22:43:20,680 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2020-01-16 22:43:20,680 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2020-01-16 22:43:20,681 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 22:43:20,681 INFO L123 encePairwiseOnDemand]: 25/28 looper letters, 1 selfloop transitions, 3 changer transitions [2020-01-16 22:43:20,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-01-16 22:43:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-01-16 22:43:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2020-01-16 22:43:20,683 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2020-01-16 22:43:20,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2020-01-16 22:43:20,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2020-01-16 22:43:20,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 22:43:20,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2020-01-16 22:43:20,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-01-16 22:43:20,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-01-16 22:43:20,686 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-01-16 22:43:20,686 INFO L174 Difference]: Start difference. First operand has 21 places, 16 transitions. Second operand 3 states and 76 transitions. [2020-01-16 22:43:20,687 INFO L199 Difference]: Finished difference. Result has 23 places, 11 transitions [2020-01-16 22:43:20,687 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 22:43:20,688 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 23 places, 11 transitions [2020-01-16 22:43:20,688 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 23 places, 11 transitions [2020-01-16 22:43:20,693 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2020-01-16 22:43:20,693 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-01-16 22:43:20,693 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 22:43:20,694 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 1 of 23 places, 0 of 11 transitions, 1 of 42 flow. [2020-01-16 22:43:20,694 INFO L478 AbstractCegarLoop]: Abstraction has has 22 places, 11 transitions [2020-01-16 22:43:20,694 INFO L479 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-01-16 22:43:20,699 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2020-01-16 22:43:20,699 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-01-16 22:43:20,699 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 22:43:20,699 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 22:43:20,700 INFO L426 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 22:43:20,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 22:43:20,700 INFO L82 PathProgramCache]: Analyzing trace with hash 949821755, now seen corresponding path program 1 times [2020-01-16 22:43:20,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 22:43:20,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269249192] [2020-01-16 22:43:20,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 22:43:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 22:43:20,843 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 22:43:20,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269249192] [2020-01-16 22:43:20,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 22:43:20,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-01-16 22:43:20,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [838433025] [2020-01-16 22:43:20,844 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-01-16 22:43:20,845 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-01-16 22:43:20,847 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 23 states and 37 transitions. [2020-01-16 22:43:20,848 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-01-16 22:43:21,173 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 10 times. [2020-01-16 22:43:21,174 INFO L458 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-01-16 22:43:21,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 22:43:21,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-01-16 22:43:21,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-01-16 22:43:21,176 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 28 [2020-01-16 22:43:21,177 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 11 transitions. Second operand 11 states. [2020-01-16 22:43:21,177 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 22:43:21,177 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 28 [2020-01-16 22:43:21,177 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 22:43:21,448 INFO L129 PetriNetUnfolder]: 10/29 cut-off events. [2020-01-16 22:43:21,448 INFO L130 PetriNetUnfolder]: For 20/22 co-relation queries the response was YES. [2020-01-16 22:43:21,449 INFO L76 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 29 events. 10/29 cut-off events. For 20/22 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 58 event pairs. 2/31 useless extension candidates. Maximal degree in co-relation 55. Up to 7 conditions per place. [2020-01-16 22:43:21,449 INFO L123 encePairwiseOnDemand]: 23/28 looper letters, 6 selfloop transitions, 16 changer transitions [2020-01-16 22:43:21,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-01-16 22:43:21,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-01-16 22:43:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2020-01-16 22:43:21,452 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2020-01-16 22:43:21,452 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 187 transitions. [2020-01-16 22:43:21,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 187 transitions. [2020-01-16 22:43:21,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 22:43:21,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 187 transitions. [2020-01-16 22:43:21,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-01-16 22:43:21,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-01-16 22:43:21,456 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-01-16 22:43:21,456 INFO L174 Difference]: Start difference. First operand has 22 places, 11 transitions. Second operand 11 states and 187 transitions. [2020-01-16 22:43:21,457 INFO L199 Difference]: Finished difference. Result has 34 places, 22 transitions [2020-01-16 22:43:21,457 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=109, PETRI_PLACES=34, PETRI_TRANSITIONS=22} [2020-01-16 22:43:21,458 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 34 places, 22 transitions [2020-01-16 22:43:21,458 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 34 places, 22 transitions [2020-01-16 22:43:21,463 INFO L129 PetriNetUnfolder]: 7/27 cut-off events. [2020-01-16 22:43:21,464 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2020-01-16 22:43:21,464 INFO L76 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 27 events. 7/27 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 66 event pairs. 0/27 useless extension candidates. Maximal degree in co-relation 53. Up to 6 conditions per place. [2020-01-16 22:43:21,465 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 2 of 34 places, 0 of 22 transitions, 3 of 109 flow. [2020-01-16 22:43:21,465 INFO L478 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions [2020-01-16 22:43:21,465 INFO L479 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-01-16 22:43:21,470 INFO L129 PetriNetUnfolder]: 7/27 cut-off events. [2020-01-16 22:43:21,471 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2020-01-16 22:43:21,475 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.01 10:43:21 BasicIcfg [2020-01-16 22:43:21,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-01-16 22:43:21,478 INFO L168 Benchmark]: Toolchain (without parser) took 1775.15 ms. Allocated memory was 143.1 MB in the beginning and 177.2 MB in the end (delta: 34.1 MB). Free memory was 118.2 MB in the beginning and 90.3 MB in the end (delta: 27.9 MB). Peak memory consumption was 62.0 MB. Max. memory is 7.1 GB. [2020-01-16 22:43:21,479 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 143.1 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-01-16 22:43:21,480 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.89 ms. Allocated memory is still 143.1 MB. Free memory was 118.2 MB in the beginning and 116.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-01-16 22:43:21,481 INFO L168 Benchmark]: Boogie Preprocessor took 18.22 ms. Allocated memory is still 143.1 MB. Free memory was 116.5 MB in the beginning and 115.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-01-16 22:43:21,482 INFO L168 Benchmark]: RCFGBuilder took 221.38 ms. Allocated memory is still 143.1 MB. Free memory was 115.3 MB in the beginning and 105.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-01-16 22:43:21,483 INFO L168 Benchmark]: TraceAbstraction took 1495.93 ms. Allocated memory was 143.1 MB in the beginning and 177.2 MB in the end (delta: 34.1 MB). Free memory was 104.8 MB in the beginning and 90.3 MB in the end (delta: 14.5 MB). Peak memory consumption was 48.6 MB. Max. memory is 7.1 GB. [2020-01-16 22:43:21,491 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 0.13 ms. Allocated memory is still 143.1 MB. Free memory was 119.4 MB in the beginning and 119.2 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 34.89 ms. Allocated memory is still 143.1 MB. Free memory was 118.2 MB in the beginning and 116.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 18.22 ms. Allocated memory is still 143.1 MB. Free memory was 116.5 MB in the beginning and 115.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 221.38 ms. Allocated memory is still 143.1 MB. Free memory was 115.3 MB in the beginning and 105.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1495.93 ms. Allocated memory was 143.1 MB in the beginning and 177.2 MB in the end (delta: 34.1 MB). Free memory was 104.8 MB in the beginning and 90.3 MB in the end (delta: 14.5 MB). Peak memory consumption was 48.6 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: 1.3s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 18 SDtfs, 27 SDslu, 24 SDs, 0 SdLazy, 42 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=3, 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, 3 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 1035 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...