/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -i ../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-abd8500 [2020-01-16 21:18:15,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-01-16 21:18:15,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-01-16 21:18:15,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-01-16 21:18:15,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2020-01-16 21:18:15,294 INFO L113 SettingsManager]: Loading preferences was successful [2020-01-16 21:18:15,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-01-16 21:18:15,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-01-16 21:18:15,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-01-16 21:18:15,296 INFO L138 SettingsManager]: * Use SBE=true [2020-01-16 21:18:15,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-01-16 21:18:15,297 INFO L138 SettingsManager]: * sizeof long=4 [2020-01-16 21:18:15,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-01-16 21:18:15,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-01-16 21:18:15,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-01-16 21:18:15,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-01-16 21:18:15,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-01-16 21:18:15,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-01-16 21:18:15,298 INFO L138 SettingsManager]: * sizeof long double=12 [2020-01-16 21:18:15,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-01-16 21:18:15,298 INFO L138 SettingsManager]: * Use constant arrays=true [2020-01-16 21:18:15,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-01-16 21:18:15,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-01-16 21:18:15,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-01-16 21:18:15,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-01-16 21:18:15,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-01-16 21:18:15,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-01-16 21:18:15,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-01-16 21:18:15,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-01-16 21:18:15,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-01-16 21:18:15,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-01-16 21:18:15,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-01-16 21:18:15,301 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-01-16 21:18:15,301 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-01-16 21:18:15,577 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-01-16 21:18:15,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-01-16 21:18:15,593 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-01-16 21:18:15,595 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-01-16 21:18:15,596 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-01-16 21:18:15,596 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl [2020-01-16 21:18:15,597 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl' [2020-01-16 21:18:15,627 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-01-16 21:18:15,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-01-16 21:18:15,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-01-16 21:18:15,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-01-16 21:18:15,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-01-16 21:18:15,647 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 09:18:15" (1/1) ... [2020-01-16 21:18:15,656 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 09:18:15" (1/1) ... [2020-01-16 21:18:15,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-01-16 21:18:15,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-01-16 21:18:15,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-01-16 21:18:15,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-01-16 21:18:15,677 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 09:18:15" (1/1) ... [2020-01-16 21:18:15,678 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 09:18:15" (1/1) ... [2020-01-16 21:18:15,678 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 09:18:15" (1/1) ... [2020-01-16 21:18:15,679 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 09:18:15" (1/1) ... [2020-01-16 21:18:15,681 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 09:18:15" (1/1) ... [2020-01-16 21:18:15,682 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 09:18:15" (1/1) ... [2020-01-16 21:18:15,683 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 09:18:15" (1/1) ... [2020-01-16 21:18:15,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-01-16 21:18:15,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-01-16 21:18:15,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-01-16 21:18:15,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-01-16 21:18:15,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:18:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-01-16 21:18:15,769 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-01-16 21:18:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-01-16 21:18:15,770 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-01-16 21:18:15,772 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-01-16 21:18:15,772 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-01-16 21:18:15,772 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-01-16 21:18:15,773 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-01-16 21:18:15,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-01-16 21:18:15,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-01-16 21:18:15,774 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-01-16 21:18:15,924 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-01-16 21:18:15,925 INFO L287 CfgBuilder]: Removed 0 assume(true) statements. [2020-01-16 21:18:15,926 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.01 09:18:15 BoogieIcfgContainer [2020-01-16 21:18:15,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-01-16 21:18:15,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-01-16 21:18:15,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-01-16 21:18:15,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-01-16 21:18:15,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 09:18:15" (1/2) ... [2020-01-16 21:18:15,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54709c30 and model type example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.01 09:18:15, skipping insertion in model container [2020-01-16 21:18:15,932 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 09:18:15" (2/2) ... [2020-01-16 21:18:15,934 INFO L109 eAbstractionObserver]: Analyzing ICFG example_2.bpl [2020-01-16 21:18:15,944 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-01-16 21:18:15,951 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-01-16 21:18:15,952 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-01-16 21:18:16,013 INFO L250 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-01-16 21:18:16,040 INFO L374 AbstractCegarLoop]: Interprodecural is true [2020-01-16 21:18:16,041 INFO L375 AbstractCegarLoop]: Hoare is false [2020-01-16 21:18:16,042 INFO L376 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-01-16 21:18:16,042 INFO L377 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-01-16 21:18:16,043 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-01-16 21:18:16,043 INFO L379 AbstractCegarLoop]: Difference is false [2020-01-16 21:18:16,043 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-01-16 21:18:16,043 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-01-16 21:18:16,065 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 15 transitions [2020-01-16 21:18:16,067 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions [2020-01-16 21:18:16,108 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2020-01-16 21:18:16,108 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-01-16 21:18:16,129 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 21:18:16,130 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions [2020-01-16 21:18:16,141 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2020-01-16 21:18:16,142 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-01-16 21:18:16,143 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 21:18:16,144 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 20 [2020-01-16 21:18:16,147 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-01-16 21:18:16,250 INFO L206 etLargeBlockEncoding]: Checked pairs total: 7 [2020-01-16 21:18:16,250 INFO L214 etLargeBlockEncoding]: Total number of compositions: 3 [2020-01-16 21:18:16,251 INFO L162 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 190 [2020-01-16 21:18:16,266 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2020-01-16 21:18:16,266 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-01-16 21:18:16,267 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:18:16,271 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:18:16,271 INFO L426 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:18:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:18:16,279 INFO L82 PathProgramCache]: Analyzing trace with hash 798353380, now seen corresponding path program 1 times [2020-01-16 21:18:16,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:18:16,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667049565] [2020-01-16 21:18:16,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:18:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:18:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-01-16 21:18:16,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667049565] [2020-01-16 21:18:16,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:18:16,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 21:18:16,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285627522] [2020-01-16 21:18:16,539 INFO L458 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-01-16 21:18:16,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:18:16,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-01-16 21:18:16,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-01-16 21:18:16,554 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 18 [2020-01-16 21:18:16,556 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 12 transitions. Second operand 4 states. [2020-01-16 21:18:16,556 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:18:16,556 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 18 [2020-01-16 21:18:16,558 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:18:16,626 INFO L129 PetriNetUnfolder]: 3/17 cut-off events. [2020-01-16 21:18:16,626 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2020-01-16 21:18:16,627 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 21:18:16,627 INFO L123 encePairwiseOnDemand]: 14/18 looper letters, 3 selfloop transitions, 4 changer transitions [2020-01-16 21:18:16,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-01-16 21:18:16,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-01-16 21:18:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2020-01-16 21:18:16,640 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2020-01-16 21:18:16,640 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 51 transitions. [2020-01-16 21:18:16,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 51 transitions. [2020-01-16 21:18:16,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:18:16,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 51 transitions. [2020-01-16 21:18:16,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-01-16 21:18:16,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-01-16 21:18:16,652 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-01-16 21:18:16,654 INFO L174 Difference]: Start difference. First operand has 16 places, 12 transitions. Second operand 4 states and 51 transitions. [2020-01-16 21:18:16,655 INFO L199 Difference]: Finished difference. Result has 21 places, 12 transitions [2020-01-16 21:18:16,657 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 21:18:16,659 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 21 places, 12 transitions [2020-01-16 21:18:16,659 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 21 places, 12 transitions [2020-01-16 21:18:16,666 INFO L129 PetriNetUnfolder]: 3/17 cut-off events. [2020-01-16 21:18:16,666 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 21:18:16,667 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 21:18:16,669 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 3 of 21 places, 0 of 12 transitions, 2 of 57 flow. [2020-01-16 21:18:16,670 INFO L478 AbstractCegarLoop]: Abstraction has has 18 places, 12 transitions [2020-01-16 21:18:16,671 INFO L479 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-01-16 21:18:16,677 INFO L129 PetriNetUnfolder]: 3/15 cut-off events. [2020-01-16 21:18:16,678 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 21:18:16,678 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 21:18:16,678 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-01-16 21:18:16,679 INFO L426 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 21:18:16,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 21:18:16,679 INFO L82 PathProgramCache]: Analyzing trace with hash 993964930, now seen corresponding path program 2 times [2020-01-16 21:18:16,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 21:18:16,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198085923] [2020-01-16 21:18:16,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 21:18:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 21:18:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-01-16 21:18:16,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198085923] [2020-01-16 21:18:16,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 21:18:16,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 21:18:16,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771629414] [2020-01-16 21:18:16,734 INFO L458 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-01-16 21:18:16,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 21:18:16,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-01-16 21:18:16,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-01-16 21:18:16,737 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 18 [2020-01-16 21:18:16,737 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 12 transitions. Second operand 4 states. [2020-01-16 21:18:16,737 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 21:18:16,737 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 18 [2020-01-16 21:18:16,738 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 21:18:16,787 INFO L129 PetriNetUnfolder]: 3/16 cut-off events. [2020-01-16 21:18:16,787 INFO L130 PetriNetUnfolder]: For 21/23 co-relation queries the response was YES. [2020-01-16 21:18:16,789 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 21:18:16,789 INFO L123 encePairwiseOnDemand]: 14/18 looper letters, 2 selfloop transitions, 5 changer transitions [2020-01-16 21:18:16,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-01-16 21:18:16,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-01-16 21:18:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 50 transitions. [2020-01-16 21:18:16,793 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2020-01-16 21:18:16,793 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 50 transitions. [2020-01-16 21:18:16,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 50 transitions. [2020-01-16 21:18:16,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 21:18:16,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 50 transitions. [2020-01-16 21:18:16,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-01-16 21:18:16,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-01-16 21:18:16,796 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-01-16 21:18:16,809 INFO L174 Difference]: Start difference. First operand has 18 places, 12 transitions. Second operand 4 states and 50 transitions. [2020-01-16 21:18:16,810 INFO L199 Difference]: Finished difference. Result has 22 places, 12 transitions [2020-01-16 21:18:16,810 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 21:18:16,811 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 22 places, 12 transitions [2020-01-16 21:18:16,811 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 22 places, 12 transitions [2020-01-16 21:18:16,822 INFO L129 PetriNetUnfolder]: 3/16 cut-off events. [2020-01-16 21:18:16,822 INFO L130 PetriNetUnfolder]: For 23/25 co-relation queries the response was YES. [2020-01-16 21:18:16,825 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 21:18:16,825 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 2 of 22 places, 0 of 12 transitions, 2 of 70 flow. [2020-01-16 21:18:16,826 INFO L478 AbstractCegarLoop]: Abstraction has has 20 places, 12 transitions [2020-01-16 21:18:16,826 INFO L479 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-01-16 21:18:16,835 INFO L129 PetriNetUnfolder]: 3/16 cut-off events. [2020-01-16 21:18:16,836 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2020-01-16 21:18:16,842 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.01 09:18:16 BasicIcfg [2020-01-16 21:18:16,846 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-01-16 21:18:16,851 INFO L168 Benchmark]: Toolchain (without parser) took 1220.57 ms. Allocated memory was 137.9 MB in the beginning and 168.3 MB in the end (delta: 30.4 MB). Free memory was 118.5 MB in the beginning and 144.0 MB in the end (delta: -25.4 MB). Peak memory consumption was 64.3 MB. Max. memory is 7.1 GB. [2020-01-16 21:18:16,852 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-01-16 21:18:16,854 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.17 ms. Allocated memory is still 137.9 MB. Free memory was 118.5 MB in the beginning and 116.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-01-16 21:18:16,862 INFO L168 Benchmark]: Boogie Preprocessor took 18.34 ms. Allocated memory is still 137.9 MB. Free memory was 116.8 MB in the beginning and 115.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-01-16 21:18:16,864 INFO L168 Benchmark]: RCFGBuilder took 241.53 ms. Allocated memory is still 137.9 MB. Free memory was 115.5 MB in the beginning and 106.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-01-16 21:18:16,866 INFO L168 Benchmark]: TraceAbstraction took 919.60 ms. Allocated memory was 137.9 MB in the beginning and 168.3 MB in the end (delta: 30.4 MB). Free memory was 105.9 MB in the beginning and 144.0 MB in the end (delta: -38.1 MB). Peak memory consumption was 51.6 MB. Max. memory is 7.1 GB. [2020-01-16 21:18:16,871 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 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 119.8 MB in the beginning and 119.6 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 36.17 ms. Allocated memory is still 137.9 MB. Free memory was 118.5 MB in the beginning and 116.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 18.34 ms. Allocated memory is still 137.9 MB. Free memory was 116.8 MB in the beginning and 115.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 241.53 ms. Allocated memory is still 137.9 MB. Free memory was 115.5 MB in the beginning and 106.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 919.60 ms. Allocated memory was 137.9 MB in the beginning and 168.3 MB in the end (delta: 30.4 MB). Free memory was 105.9 MB in the beginning and 144.0 MB in the end (delta: -38.1 MB). Peak memory consumption was 51.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.1s, 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...