/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_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-abd8500 [2020-01-16 23:32:07,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-01-16 23:32:07,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-01-16 23:32:07,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-01-16 23:32:07,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-01-16 23:32:07,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-01-16 23:32:07,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-01-16 23:32:07,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-01-16 23:32:07,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-01-16 23:32:07,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-01-16 23:32:07,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-01-16 23:32:07,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-01-16 23:32:07,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-01-16 23:32:07,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-01-16 23:32:07,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-01-16 23:32:07,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-01-16 23:32:07,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-01-16 23:32:07,650 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 23:32:07,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-01-16 23:32:07,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-01-16 23:32:07,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-01-16 23:32:07,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-01-16 23:32:07,666 INFO L138 SettingsManager]: * Use SBE=true [2020-01-16 23:32:07,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-01-16 23:32:07,667 INFO L138 SettingsManager]: * sizeof long=4 [2020-01-16 23:32:07,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-01-16 23:32:07,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-01-16 23:32:07,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-01-16 23:32:07,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-01-16 23:32:07,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-01-16 23:32:07,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-01-16 23:32:07,668 INFO L138 SettingsManager]: * sizeof long double=12 [2020-01-16 23:32:07,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-01-16 23:32:07,669 INFO L138 SettingsManager]: * Use constant arrays=true [2020-01-16 23:32:07,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-01-16 23:32:07,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-01-16 23:32:07,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-01-16 23:32:07,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-01-16 23:32:07,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-01-16 23:32:07,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-01-16 23:32:07,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-01-16 23:32:07,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-01-16 23:32:07,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-01-16 23:32:07,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-01-16 23:32:07,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-01-16 23:32:07,671 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-01-16 23:32:07,671 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-01-16 23:32:07,671 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-01-16 23:32:07,672 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-01-16 23:32:07,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-01-16 23:32:07,946 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-01-16 23:32:07,964 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-01-16 23:32:07,966 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-01-16 23:32:07,967 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-01-16 23:32:07,968 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-01-16 23:32:07,969 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl [2020-01-16 23:32:07,969 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl' [2020-01-16 23:32:08,001 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-01-16 23:32:08,004 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-01-16 23:32:08,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-01-16 23:32:08,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-01-16 23:32:08,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-01-16 23:32:08,021 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 11:32:07" (1/1) ... [2020-01-16 23:32:08,030 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 11:32:07" (1/1) ... [2020-01-16 23:32:08,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-01-16 23:32:08,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-01-16 23:32:08,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-01-16 23:32:08,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-01-16 23:32:08,050 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 11:32:07" (1/1) ... [2020-01-16 23:32:08,051 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 11:32:07" (1/1) ... [2020-01-16 23:32:08,051 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 11:32:07" (1/1) ... [2020-01-16 23:32:08,051 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 11:32:07" (1/1) ... [2020-01-16 23:32:08,054 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 11:32:07" (1/1) ... [2020-01-16 23:32:08,055 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 11:32:07" (1/1) ... [2020-01-16 23:32:08,056 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 11:32:07" (1/1) ... [2020-01-16 23:32:08,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-01-16 23:32:08,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-01-16 23:32:08,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-01-16 23:32:08,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-01-16 23:32:08,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:32:07" (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 23:32:08,134 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-01-16 23:32:08,134 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-01-16 23:32:08,135 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-01-16 23:32:08,135 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-01-16 23:32:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-01-16 23:32:08,136 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-01-16 23:32:08,136 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-01-16 23:32:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-01-16 23:32:08,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-01-16 23:32:08,137 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 23:32:08,281 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-01-16 23:32:08,281 INFO L287 CfgBuilder]: Removed 0 assume(true) statements. [2020-01-16 23:32:08,283 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.01 11:32:08 BoogieIcfgContainer [2020-01-16 23:32:08,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-01-16 23:32:08,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-01-16 23:32:08,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-01-16 23:32:08,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-01-16 23:32:08,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:32:07" (1/2) ... [2020-01-16 23:32:08,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e544cc2 and model type example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.01 11:32:08, skipping insertion in model container [2020-01-16 23:32:08,291 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 11:32:08" (2/2) ... [2020-01-16 23:32:08,293 INFO L109 eAbstractionObserver]: Analyzing ICFG example_2.bpl [2020-01-16 23:32:08,304 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-01-16 23:32:08,312 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-01-16 23:32:08,314 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-01-16 23:32:08,396 INFO L250 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-01-16 23:32:08,435 INFO L374 AbstractCegarLoop]: Interprodecural is true [2020-01-16 23:32:08,435 INFO L375 AbstractCegarLoop]: Hoare is false [2020-01-16 23:32:08,435 INFO L376 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-01-16 23:32:08,436 INFO L377 AbstractCegarLoop]: Backedges is MCR [2020-01-16 23:32:08,436 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-01-16 23:32:08,436 INFO L379 AbstractCegarLoop]: Difference is false [2020-01-16 23:32:08,436 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-01-16 23:32:08,436 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-01-16 23:32:08,475 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2020-01-16 23:32:08,476 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-01-16 23:32:08,476 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 23:32:08,477 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 23:32:08,477 INFO L426 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 23:32:08,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 23:32:08,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1311334296, now seen corresponding path program 1 times [2020-01-16 23:32:08,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 23:32:08,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590078235] [2020-01-16 23:32:08,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 23:32:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 23:32:08,648 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 23:32:08,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590078235] [2020-01-16 23:32:08,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 23:32:08,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 23:32:08,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [106350586] [2020-01-16 23:32:08,659 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-01-16 23:32:08,693 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-01-16 23:32:08,739 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 18 states and 25 transitions. [2020-01-16 23:32:08,739 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-01-16 23:32:08,753 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2020-01-16 23:32:08,754 INFO L458 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-01-16 23:32:08,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 23:32:08,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-01-16 23:32:08,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-01-16 23:32:08,773 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 15 [2020-01-16 23:32:08,775 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions. Second operand 3 states. [2020-01-16 23:32:08,776 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 23:32:08,776 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 15 [2020-01-16 23:32:08,778 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 23:32:08,796 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2020-01-16 23:32:08,796 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2020-01-16 23:32:08,801 INFO L76 FinitePrefix]: Finished finitePrefix Result has 23 conditions, 11 events. 0/11 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs. 1/11 useless extension candidates. Maximal degree in co-relation 8. Up to 2 conditions per place. [2020-01-16 23:32:08,802 INFO L123 encePairwiseOnDemand]: 13/15 looper letters, 1 selfloop transitions, 2 changer transitions [2020-01-16 23:32:08,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-01-16 23:32:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-01-16 23:32:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2020-01-16 23:32:08,811 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2020-01-16 23:32:08,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 39 transitions. [2020-01-16 23:32:08,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 39 transitions. [2020-01-16 23:32:08,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 23:32:08,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 39 transitions. [2020-01-16 23:32:08,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-01-16 23:32:08,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-01-16 23:32:08,825 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-01-16 23:32:08,827 INFO L174 Difference]: Start difference. First operand has 20 places, 15 transitions. Second operand 3 states and 39 transitions. [2020-01-16 23:32:08,827 INFO L199 Difference]: Finished difference. Result has 22 places, 11 transitions [2020-01-16 23:32:08,830 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=22, PETRI_TRANSITIONS=11} [2020-01-16 23:32:08,832 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 22 places, 11 transitions [2020-01-16 23:32:08,832 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 22 places, 11 transitions [2020-01-16 23:32:08,839 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2020-01-16 23:32:08,839 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2020-01-16 23:32:08,840 INFO L76 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 11 events. 0/11 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs. 0/10 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2020-01-16 23:32:08,846 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 4 of 22 places, 0 of 11 transitions, 2 of 36 flow. [2020-01-16 23:32:08,847 INFO L478 AbstractCegarLoop]: Abstraction has has 18 places, 11 transitions [2020-01-16 23:32:08,847 INFO L479 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-01-16 23:32:08,852 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2020-01-16 23:32:08,852 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2020-01-16 23:32:08,852 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 23:32:08,853 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 23:32:08,853 INFO L426 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 23:32:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 23:32:08,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2113080518, now seen corresponding path program 1 times [2020-01-16 23:32:08,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 23:32:08,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732153482] [2020-01-16 23:32:08,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 23:32:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 23:32:08,948 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 23:32:08,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732153482] [2020-01-16 23:32:08,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 23:32:08,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 23:32:08,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [292079524] [2020-01-16 23:32:08,950 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-01-16 23:32:08,951 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-01-16 23:32:08,954 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 18 states and 25 transitions. [2020-01-16 23:32:08,954 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-01-16 23:32:09,030 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2020-01-16 23:32:09,031 INFO L458 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-01-16 23:32:09,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 23:32:09,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-01-16 23:32:09,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-01-16 23:32:09,034 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 15 [2020-01-16 23:32:09,034 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 11 transitions. Second operand 6 states. [2020-01-16 23:32:09,034 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 23:32:09,035 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 15 [2020-01-16 23:32:09,035 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 23:32:09,147 INFO L129 PetriNetUnfolder]: 2/18 cut-off events. [2020-01-16 23:32:09,148 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2020-01-16 23:32:09,148 INFO L76 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 18 events. 2/18 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 27 event pairs. 0/18 useless extension candidates. Maximal degree in co-relation 24. Up to 5 conditions per place. [2020-01-16 23:32:09,149 INFO L123 encePairwiseOnDemand]: 11/15 looper letters, 4 selfloop transitions, 6 changer transitions [2020-01-16 23:32:09,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-01-16 23:32:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-01-16 23:32:09,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2020-01-16 23:32:09,163 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2020-01-16 23:32:09,163 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 58 transitions. [2020-01-16 23:32:09,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 58 transitions. [2020-01-16 23:32:09,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 23:32:09,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 58 transitions. [2020-01-16 23:32:09,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-01-16 23:32:09,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-01-16 23:32:09,165 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-01-16 23:32:09,165 INFO L174 Difference]: Start difference. First operand has 18 places, 11 transitions. Second operand 6 states and 58 transitions. [2020-01-16 23:32:09,166 INFO L199 Difference]: Finished difference. Result has 24 places, 13 transitions [2020-01-16 23:32:09,166 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=55, PETRI_PLACES=24, PETRI_TRANSITIONS=13} [2020-01-16 23:32:09,167 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 24 places, 13 transitions [2020-01-16 23:32:09,167 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 24 places, 13 transitions [2020-01-16 23:32:09,172 INFO L129 PetriNetUnfolder]: 1/16 cut-off events. [2020-01-16 23:32:09,172 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-01-16 23:32:09,173 INFO L76 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 16 events. 1/16 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 21 event pairs. 0/16 useless extension candidates. Maximal degree in co-relation 19. Up to 3 conditions per place. [2020-01-16 23:32:09,173 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 2 of 24 places, 0 of 13 transitions, 2 of 55 flow. [2020-01-16 23:32:09,174 INFO L478 AbstractCegarLoop]: Abstraction has has 22 places, 13 transitions [2020-01-16 23:32:09,174 INFO L479 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-01-16 23:32:09,178 INFO L129 PetriNetUnfolder]: 1/16 cut-off events. [2020-01-16 23:32:09,178 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-01-16 23:32:09,184 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.01 11:32:09 BasicIcfg [2020-01-16 23:32:09,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-01-16 23:32:09,188 INFO L168 Benchmark]: Toolchain (without parser) took 1183.29 ms. Allocated memory was 145.2 MB in the beginning and 174.6 MB in the end (delta: 29.4 MB). Free memory was 120.3 MB in the beginning and 142.7 MB in the end (delta: -22.4 MB). Peak memory consumption was 65.5 MB. Max. memory is 7.1 GB. [2020-01-16 23:32:09,189 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory was 121.6 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-01-16 23:32:09,190 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.71 ms. Allocated memory is still 145.2 MB. Free memory was 120.3 MB in the beginning and 118.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-01-16 23:32:09,191 INFO L168 Benchmark]: Boogie Preprocessor took 17.33 ms. Allocated memory is still 145.2 MB. Free memory was 118.6 MB in the beginning and 117.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-01-16 23:32:09,192 INFO L168 Benchmark]: RCFGBuilder took 226.49 ms. Allocated memory is still 145.2 MB. Free memory was 117.3 MB in the beginning and 108.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-01-16 23:32:09,193 INFO L168 Benchmark]: TraceAbstraction took 898.93 ms. Allocated memory was 145.2 MB in the beginning and 174.6 MB in the end (delta: 29.4 MB). Free memory was 107.7 MB in the beginning and 143.1 MB in the end (delta: -35.4 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2020-01-16 23:32:09,197 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 0.18 ms. Allocated memory is still 145.2 MB. Free memory was 121.6 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 34.71 ms. Allocated memory is still 145.2 MB. Free memory was 120.3 MB in the beginning and 118.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 17.33 ms. Allocated memory is still 145.2 MB. Free memory was 118.6 MB in the beginning and 117.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 226.49 ms. Allocated memory is still 145.2 MB. Free memory was 117.3 MB in the beginning and 108.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 898.93 ms. Allocated memory was 145.2 MB in the beginning and 174.6 MB in the end (delta: 29.4 MB). Free memory was 107.7 MB in the beginning and 143.1 MB in the end (delta: -35.4 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8 SDtfs, 10 SDslu, 5 SDs, 0 SdLazy, 11 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 512 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...