/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-NoLbe-MCR.epf -i ../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-abd8500 [2020-01-16 23:37:19,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-01-16 23:37:19,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-01-16 23:37:19,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-01-16 23:37:19,263 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-NoLbe-MCR.epf [2020-01-16 23:37:19,296 INFO L113 SettingsManager]: Loading preferences was successful [2020-01-16 23:37:19,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-01-16 23:37:19,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-01-16 23:37:19,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-01-16 23:37:19,298 INFO L138 SettingsManager]: * Use SBE=true [2020-01-16 23:37:19,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-01-16 23:37:19,301 INFO L138 SettingsManager]: * sizeof long=4 [2020-01-16 23:37:19,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-01-16 23:37:19,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-01-16 23:37:19,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-01-16 23:37:19,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-01-16 23:37:19,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-01-16 23:37:19,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-01-16 23:37:19,303 INFO L138 SettingsManager]: * sizeof long double=12 [2020-01-16 23:37:19,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-01-16 23:37:19,303 INFO L138 SettingsManager]: * Use constant arrays=true [2020-01-16 23:37:19,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-01-16 23:37:19,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-01-16 23:37:19,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-01-16 23:37:19,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-01-16 23:37:19,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-01-16 23:37:19,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-01-16 23:37:19,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-01-16 23:37:19,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-01-16 23:37:19,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-01-16 23:37:19,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-01-16 23:37:19,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-01-16 23:37:19,308 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-01-16 23:37:19,309 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-01-16 23:37:19,309 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-01-16 23:37:19,309 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-01-16 23:37:19,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-01-16 23:37:19,620 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-01-16 23:37:19,643 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-01-16 23:37:19,646 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-01-16 23:37:19,648 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-01-16 23:37:19,651 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-01-16 23:37:19,651 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl [2020-01-16 23:37:19,652 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl' [2020-01-16 23:37:19,685 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-01-16 23:37:19,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-01-16 23:37:19,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-01-16 23:37:19,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-01-16 23:37:19,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-01-16 23:37:19,707 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 11:37:19" (1/1) ... [2020-01-16 23:37:19,717 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 11:37:19" (1/1) ... [2020-01-16 23:37:19,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-01-16 23:37:19,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-01-16 23:37:19,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-01-16 23:37:19,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-01-16 23:37:19,746 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 11:37:19" (1/1) ... [2020-01-16 23:37:19,747 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 11:37:19" (1/1) ... [2020-01-16 23:37:19,747 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 11:37:19" (1/1) ... [2020-01-16 23:37:19,748 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 11:37:19" (1/1) ... [2020-01-16 23:37:19,752 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 11:37:19" (1/1) ... [2020-01-16 23:37:19,753 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 11:37:19" (1/1) ... [2020-01-16 23:37:19,754 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 11:37:19" (1/1) ... [2020-01-16 23:37:19,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-01-16 23:37:19,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-01-16 23:37:19,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-01-16 23:37:19,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-01-16 23:37:19,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:37:19" (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 23:37:19,836 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-01-16 23:37:19,836 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-01-16 23:37:19,836 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-01-16 23:37:19,837 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2020-01-16 23:37:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2020-01-16 23:37:19,837 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2020-01-16 23:37:19,838 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-01-16 23:37:19,838 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-01-16 23:37:19,838 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-01-16 23:37:19,838 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-01-16 23:37:19,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-01-16 23:37:19,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-01-16 23:37:19,840 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 23:37:19,983 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-01-16 23:37:19,984 INFO L287 CfgBuilder]: Removed 0 assume(true) statements. [2020-01-16 23:37:19,985 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.01 11:37:19 BoogieIcfgContainer [2020-01-16 23:37:19,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-01-16 23:37:19,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-01-16 23:37:19,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-01-16 23:37:19,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-01-16 23:37:19,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:37:19" (1/2) ... [2020-01-16 23:37:19,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b86735b and model type example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.01 11:37:19, skipping insertion in model container [2020-01-16 23:37:19,991 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 11:37:19" (2/2) ... [2020-01-16 23:37:19,993 INFO L109 eAbstractionObserver]: Analyzing ICFG example_3.bpl [2020-01-16 23:37:20,003 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-01-16 23:37:20,010 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-01-16 23:37:20,011 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-01-16 23:37:20,188 INFO L250 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-01-16 23:37:20,228 INFO L374 AbstractCegarLoop]: Interprodecural is true [2020-01-16 23:37:20,228 INFO L375 AbstractCegarLoop]: Hoare is false [2020-01-16 23:37:20,229 INFO L376 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-01-16 23:37:20,229 INFO L377 AbstractCegarLoop]: Backedges is MCR [2020-01-16 23:37:20,229 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-01-16 23:37:20,229 INFO L379 AbstractCegarLoop]: Difference is false [2020-01-16 23:37:20,229 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-01-16 23:37:20,229 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-01-16 23:37:20,276 INFO L129 PetriNetUnfolder]: 5/21 cut-off events. [2020-01-16 23:37:20,276 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 23:37:20,276 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 23:37:20,277 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 23:37:20,278 INFO L426 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 23:37:20,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 23:37:20,285 INFO L82 PathProgramCache]: Analyzing trace with hash -451704695, now seen corresponding path program 1 times [2020-01-16 23:37:20,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 23:37:20,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045035595] [2020-01-16 23:37:20,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 23:37:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 23:37:20,442 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 23:37:20,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045035595] [2020-01-16 23:37:20,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 23:37:20,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 23:37:20,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1008857053] [2020-01-16 23:37:20,446 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-01-16 23:37:20,456 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-01-16 23:37:20,485 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 54 states and 109 transitions. [2020-01-16 23:37:20,486 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-01-16 23:37:20,495 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2020-01-16 23:37:20,495 INFO L458 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-01-16 23:37:20,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 23:37:20,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-01-16 23:37:20,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-01-16 23:37:20,511 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 24 [2020-01-16 23:37:20,513 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions. Second operand 3 states. [2020-01-16 23:37:20,514 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 23:37:20,514 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 24 [2020-01-16 23:37:20,516 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 23:37:20,547 INFO L129 PetriNetUnfolder]: 3/21 cut-off events. [2020-01-16 23:37:20,547 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-01-16 23:37:20,552 INFO L76 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 21 events. 3/21 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 25 event pairs. 1/21 useless extension candidates. Maximal degree in co-relation 18. Up to 4 conditions per place. [2020-01-16 23:37:20,553 INFO L123 encePairwiseOnDemand]: 22/24 looper letters, 2 selfloop transitions, 2 changer transitions [2020-01-16 23:37:20,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-01-16 23:37:20,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-01-16 23:37:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2020-01-16 23:37:20,560 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2020-01-16 23:37:20,561 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2020-01-16 23:37:20,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2020-01-16 23:37:20,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 23:37:20,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2020-01-16 23:37:20,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-01-16 23:37:20,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-01-16 23:37:20,578 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-01-16 23:37:20,581 INFO L174 Difference]: Start difference. First operand has 28 places, 24 transitions. Second operand 3 states and 64 transitions. [2020-01-16 23:37:20,583 INFO L199 Difference]: Finished difference. Result has 30 places, 20 transitions [2020-01-16 23:37:20,586 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2020-01-16 23:37:20,588 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 30 places, 20 transitions [2020-01-16 23:37:20,589 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 30 places, 20 transitions [2020-01-16 23:37:20,604 INFO L129 PetriNetUnfolder]: 3/21 cut-off events. [2020-01-16 23:37:20,605 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-01-16 23:37:20,606 INFO L76 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 21 events. 3/21 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 27 event pairs. 0/20 useless extension candidates. Maximal degree in co-relation 30. Up to 4 conditions per place. [2020-01-16 23:37:20,613 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 5 of 30 places, 0 of 20 transitions, 2 of 75 flow. [2020-01-16 23:37:20,615 INFO L478 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions [2020-01-16 23:37:20,615 INFO L479 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-01-16 23:37:20,623 INFO L129 PetriNetUnfolder]: 3/18 cut-off events. [2020-01-16 23:37:20,623 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-01-16 23:37:20,623 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 23:37:20,623 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 23:37:20,624 INFO L426 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 23:37:20,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 23:37:20,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1637508949, now seen corresponding path program 1 times [2020-01-16 23:37:20,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 23:37:20,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906532693] [2020-01-16 23:37:20,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 23:37:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 23:37:20,663 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 23:37:20,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906532693] [2020-01-16 23:37:20,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 23:37:20,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 23:37:20,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1185891694] [2020-01-16 23:37:20,666 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-01-16 23:37:20,666 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-01-16 23:37:20,674 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 54 states and 109 transitions. [2020-01-16 23:37:20,675 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-01-16 23:37:20,679 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2020-01-16 23:37:20,681 INFO L458 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-01-16 23:37:20,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 23:37:20,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-01-16 23:37:20,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-01-16 23:37:20,683 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 24 [2020-01-16 23:37:20,684 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions. Second operand 3 states. [2020-01-16 23:37:20,684 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 23:37:20,684 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 24 [2020-01-16 23:37:20,684 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 23:37:20,701 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2020-01-16 23:37:20,701 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2020-01-16 23:37:20,702 INFO L76 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 15 events. 0/15 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs. 2/16 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2020-01-16 23:37:20,703 INFO L123 encePairwiseOnDemand]: 21/24 looper letters, 1 selfloop transitions, 3 changer transitions [2020-01-16 23:37:20,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-01-16 23:37:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-01-16 23:37:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2020-01-16 23:37:20,705 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2020-01-16 23:37:20,705 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2020-01-16 23:37:20,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2020-01-16 23:37:20,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 23:37:20,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2020-01-16 23:37:20,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-01-16 23:37:20,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-01-16 23:37:20,709 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-01-16 23:37:20,709 INFO L174 Difference]: Start difference. First operand has 25 places, 20 transitions. Second operand 3 states and 64 transitions. [2020-01-16 23:37:20,710 INFO L199 Difference]: Finished difference. Result has 27 places, 15 transitions [2020-01-16 23:37:20,710 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=27, PETRI_TRANSITIONS=15} [2020-01-16 23:37:20,713 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 27 places, 15 transitions [2020-01-16 23:37:20,713 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 27 places, 15 transitions [2020-01-16 23:37:20,724 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2020-01-16 23:37:20,724 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-01-16 23:37:20,725 INFO L76 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 15 events. 0/15 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs. 0/14 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2020-01-16 23:37:20,726 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 1 of 27 places, 0 of 15 transitions, 1 of 50 flow. [2020-01-16 23:37:20,726 INFO L478 AbstractCegarLoop]: Abstraction has has 26 places, 15 transitions [2020-01-16 23:37:20,727 INFO L479 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-01-16 23:37:20,732 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2020-01-16 23:37:20,732 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-01-16 23:37:20,732 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 23:37:20,732 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 23:37:20,733 INFO L426 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 23:37:20,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 23:37:20,733 INFO L82 PathProgramCache]: Analyzing trace with hash -708234035, now seen corresponding path program 1 times [2020-01-16 23:37:20,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 23:37:20,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076485685] [2020-01-16 23:37:20,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 23:37:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 23:37:20,936 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 23:37:20,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076485685] [2020-01-16 23:37:20,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 23:37:20,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-01-16 23:37:20,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1302368030] [2020-01-16 23:37:20,938 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-01-16 23:37:20,938 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-01-16 23:37:20,942 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 54 states and 109 transitions. [2020-01-16 23:37:20,942 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-01-16 23:37:21,039 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2020-01-16 23:37:21,039 INFO L458 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-01-16 23:37:21,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 23:37:21,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-01-16 23:37:21,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-01-16 23:37:21,048 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 24 [2020-01-16 23:37:21,049 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 15 transitions. Second operand 9 states. [2020-01-16 23:37:21,049 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 23:37:21,049 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 24 [2020-01-16 23:37:21,049 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 23:37:21,153 INFO L129 PetriNetUnfolder]: 5/27 cut-off events. [2020-01-16 23:37:21,153 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-01-16 23:37:21,154 INFO L76 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 27 events. 5/27 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 55 event pairs. 0/27 useless extension candidates. Maximal degree in co-relation 37. Up to 4 conditions per place. [2020-01-16 23:37:21,154 INFO L123 encePairwiseOnDemand]: 20/24 looper letters, 1 selfloop transitions, 13 changer transitions [2020-01-16 23:37:21,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-01-16 23:37:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-01-16 23:37:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2020-01-16 23:37:21,158 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.8564814814814815 [2020-01-16 23:37:21,159 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 185 transitions. [2020-01-16 23:37:21,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 185 transitions. [2020-01-16 23:37:21,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 23:37:21,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 185 transitions. [2020-01-16 23:37:21,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-01-16 23:37:21,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-01-16 23:37:21,166 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-01-16 23:37:21,166 INFO L174 Difference]: Start difference. First operand has 26 places, 15 transitions. Second operand 9 states and 185 transitions. [2020-01-16 23:37:21,167 INFO L199 Difference]: Finished difference. Result has 34 places, 23 transitions [2020-01-16 23:37:21,167 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2020-01-16 23:37:21,171 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 34 places, 23 transitions [2020-01-16 23:37:21,171 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 34 places, 23 transitions [2020-01-16 23:37:21,185 INFO L129 PetriNetUnfolder]: 5/29 cut-off events. [2020-01-16 23:37:21,185 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-01-16 23:37:21,186 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 29 events. 5/29 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 70 event pairs. 0/29 useless extension candidates. Maximal degree in co-relation 39. Up to 4 conditions per place. [2020-01-16 23:37:21,186 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 2 of 34 places, 0 of 23 transitions, 3 of 89 flow. [2020-01-16 23:37:21,187 INFO L478 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions [2020-01-16 23:37:21,187 INFO L479 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-01-16 23:37:21,192 INFO L129 PetriNetUnfolder]: 5/29 cut-off events. [2020-01-16 23:37:21,193 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-01-16 23:37:21,198 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.01 11:37:21 BasicIcfg [2020-01-16 23:37:21,198 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-01-16 23:37:21,201 INFO L168 Benchmark]: Toolchain (without parser) took 1513.32 ms. Allocated memory was 146.3 MB in the beginning and 174.1 MB in the end (delta: 27.8 MB). Free memory was 121.4 MB in the beginning and 117.0 MB in the end (delta: 4.3 MB). Peak memory consumption was 32.1 MB. Max. memory is 7.1 GB. [2020-01-16 23:37:21,202 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 146.3 MB. Free memory is still 122.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-01-16 23:37:21,203 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.78 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 119.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-01-16 23:37:21,204 INFO L168 Benchmark]: Boogie Preprocessor took 21.90 ms. Allocated memory is still 146.3 MB. Free memory was 119.2 MB in the beginning and 118.4 MB in the end (delta: 855.7 kB). Peak memory consumption was 855.7 kB. Max. memory is 7.1 GB. [2020-01-16 23:37:21,205 INFO L168 Benchmark]: RCFGBuilder took 229.65 ms. Allocated memory is still 146.3 MB. Free memory was 118.4 MB in the beginning and 108.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-01-16 23:37:21,206 INFO L168 Benchmark]: TraceAbstraction took 1212.39 ms. Allocated memory was 146.3 MB in the beginning and 174.1 MB in the end (delta: 27.8 MB). Free memory was 107.9 MB in the beginning and 117.0 MB in the end (delta: -9.1 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-01-16 23:37:21,210 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 0.19 ms. Allocated memory is still 146.3 MB. Free memory is still 122.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.78 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 119.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.90 ms. Allocated memory is still 146.3 MB. Free memory was 119.2 MB in the beginning and 118.4 MB in the end (delta: 855.7 kB). Peak memory consumption was 855.7 kB. Max. memory is 7.1 GB. * RCFGBuilder took 229.65 ms. Allocated memory is still 146.3 MB. Free memory was 118.4 MB in the beginning and 108.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1212.39 ms. Allocated memory was 146.3 MB in the beginning and 174.1 MB in the end (delta: 27.8 MB). Free memory was 107.9 MB in the beginning and 117.0 MB in the end (delta: -9.1 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 0.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 17 SDslu, 15 SDs, 0 SdLazy, 19 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s 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, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1872 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...