/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-d9e330d [2020-02-10 22:59:50,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-02-10 22:59:50,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-02-10 22:59:50,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-02-10 22:59:50,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-02-10 22:59:50,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-02-10 22:59:50,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-02-10 22:59:50,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-02-10 22:59:50,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-02-10 22:59:50,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-02-10 22:59:50,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-02-10 22:59:50,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-02-10 22:59:50,451 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 [2020-02-10 22:59:50,480 INFO L113 SettingsManager]: Loading preferences was successful [2020-02-10 22:59:50,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-02-10 22:59:50,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-02-10 22:59:50,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-02-10 22:59:50,482 INFO L138 SettingsManager]: * Use SBE=true [2020-02-10 22:59:50,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-02-10 22:59:50,482 INFO L138 SettingsManager]: * sizeof long=4 [2020-02-10 22:59:50,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-02-10 22:59:50,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-02-10 22:59:50,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-02-10 22:59:50,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-02-10 22:59:50,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-02-10 22:59:50,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-02-10 22:59:50,483 INFO L138 SettingsManager]: * sizeof long double=12 [2020-02-10 22:59:50,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-02-10 22:59:50,484 INFO L138 SettingsManager]: * Use constant arrays=true [2020-02-10 22:59:50,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-02-10 22:59:50,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-02-10 22:59:50,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-02-10 22:59:50,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-02-10 22:59:50,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-02-10 22:59:50,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-02-10 22:59:50,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-02-10 22:59:50,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-02-10 22:59:50,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-02-10 22:59:50,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-02-10 22:59:50,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-02-10 22:59:50,487 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-02-10 22:59:50,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-02-10 22:59:50,738 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-02-10 22:59:50,754 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-02-10 22:59:50,758 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-02-10 22:59:50,759 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-02-10 22:59:50,760 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-02-10 22:59:50,761 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl [2020-02-10 22:59:50,761 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl' [2020-02-10 22:59:50,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-02-10 22:59:50,804 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-02-10 22:59:50,805 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-02-10 22:59:50,805 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-02-10 22:59:50,805 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-02-10 22:59:50,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 10:59:50" (1/1) ... [2020-02-10 22:59:50,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 10:59:50" (1/1) ... [2020-02-10 22:59:50,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-02-10 22:59:50,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-02-10 22:59:50,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-02-10 22:59:50,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-02-10 22:59:50,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 10:59:50" (1/1) ... [2020-02-10 22:59:50,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 10:59:50" (1/1) ... [2020-02-10 22:59:50,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 10:59:50" (1/1) ... [2020-02-10 22:59:50,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 10:59:50" (1/1) ... [2020-02-10 22:59:50,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 10:59:50" (1/1) ... [2020-02-10 22:59:50,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 10:59:50" (1/1) ... [2020-02-10 22:59:50,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 10:59:50" (1/1) ... [2020-02-10 22:59:50,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-02-10 22:59:50,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-02-10 22:59:50,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-02-10 22:59:50,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-02-10 22:59:50,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 10:59:50" (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 [2020-02-10 22:59:50,927 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-02-10 22:59:50,927 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-02-10 22:59:50,927 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-02-10 22:59:50,927 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-02-10 22:59:50,928 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-02-10 22:59:50,928 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-02-10 22:59:50,928 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-02-10 22:59:50,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-02-10 22:59:50,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-02-10 22:59:50,929 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-02-10 22:59:51,092 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-02-10 22:59:51,092 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-02-10 22:59:51,097 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 10:59:51 BoogieIcfgContainer [2020-02-10 22:59:51,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-02-10 22:59:51,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-02-10 22:59:51,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-02-10 22:59:51,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-02-10 22:59:51,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 10:59:50" (1/2) ... [2020-02-10 22:59:51,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739305fe and model type example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 10:59:51, skipping insertion in model container [2020-02-10 22:59:51,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 10:59:51" (2/2) ... [2020-02-10 22:59:51,106 INFO L109 eAbstractionObserver]: Analyzing ICFG example_2.bpl [2020-02-10 22:59:51,118 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-02-10 22:59:51,128 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-02-10 22:59:51,129 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-02-10 22:59:51,188 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-02-10 22:59:51,208 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-02-10 22:59:51,209 INFO L376 AbstractCegarLoop]: Hoare is false [2020-02-10 22:59:51,209 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-02-10 22:59:51,209 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-02-10 22:59:51,209 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-02-10 22:59:51,209 INFO L380 AbstractCegarLoop]: Difference is false [2020-02-10 22:59:51,210 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-02-10 22:59:51,210 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-02-10 22:59:51,220 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions [2020-02-10 22:59:51,256 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2020-02-10 22:59:51,256 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-02-10 22:59:51,265 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. [2020-02-10 22:59:51,266 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions [2020-02-10 22:59:51,273 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 11 transitions [2020-02-10 22:59:51,277 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 16 places, 11 transitions [2020-02-10 22:59:51,278 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 16 places, 11 transitions [2020-02-10 22:59:51,285 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2020-02-10 22:59:51,285 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-02-10 22:59:51,286 INFO L76 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 11 events. 1/11 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs. 0/11 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2020-02-10 22:59:51,287 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 16 places, 11 transitions [2020-02-10 22:59:51,293 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2020-02-10 22:59:51,293 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-02-10 22:59:51,294 INFO L76 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 11 events. 1/11 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs. 0/11 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2020-02-10 22:59:51,295 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 20 [2020-02-10 22:59:51,296 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-02-10 22:59:51,329 INFO L206 etLargeBlockEncoding]: Checked pairs total: 7 [2020-02-10 22:59:51,329 INFO L214 etLargeBlockEncoding]: Total number of compositions: 2 [2020-02-10 22:59:51,329 INFO L160 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 56 [2020-02-10 22:59:51,337 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2020-02-10 22:59:51,337 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-02-10 22:59:51,337 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 22:59:51,338 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-02-10 22:59:51,339 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 22:59:51,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 22:59:51,344 INFO L82 PathProgramCache]: Analyzing trace with hash 798323589, now seen corresponding path program 1 times [2020-02-10 22:59:51,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 22:59:51,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895730375] [2020-02-10 22:59:51,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 22:59:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 22:59:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 22:59:51,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895730375] [2020-02-10 22:59:51,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 22:59:51,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-02-10 22:59:51,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779828354] [2020-02-10 22:59:51,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-02-10 22:59:51,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 22:59:51,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-02-10 22:59:51,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-02-10 22:59:51,663 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 17 [2020-02-10 22:59:51,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 9 transitions. Second operand 4 states. [2020-02-10 22:59:51,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 22:59:51,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 17 [2020-02-10 22:59:51,668 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 22:59:51,763 INFO L129 PetriNetUnfolder]: 2/15 cut-off events. [2020-02-10 22:59:51,763 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2020-02-10 22:59:51,764 INFO L76 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 15 events. 2/15 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs. 1/15 useless extension candidates. Maximal degree in co-relation 15. Up to 5 conditions per place. [2020-02-10 22:59:51,766 INFO L145 encePairwiseOnDemand]: 14/17 looper letters, 2 selfloop transitions, 1 changer transitions 1/10 dead transitions. [2020-02-10 22:59:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-02-10 22:59:51,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-02-10 22:59:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 49 transitions. [2020-02-10 22:59:51,780 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.7205882352941176 [2020-02-10 22:59:51,781 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 49 transitions. [2020-02-10 22:59:51,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 49 transitions. [2020-02-10 22:59:51,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 22:59:51,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 49 transitions. [2020-02-10 22:59:51,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-02-10 22:59:51,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-02-10 22:59:51,793 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-02-10 22:59:51,795 INFO L178 Difference]: Start difference. First operand has 14 places, 9 transitions. Second operand 4 states and 49 transitions. [2020-02-10 22:59:51,796 INFO L206 Difference]: Finished difference. Result has 19 places, 9 transitions [2020-02-10 22:59:51,799 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=43, PETRI_PLACES=19, PETRI_TRANSITIONS=9} [2020-02-10 22:59:51,800 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 19 places, 9 transitions [2020-02-10 22:59:51,805 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2020-02-10 22:59:51,805 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-02-10 22:59:51,806 INFO L76 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 11 events. 1/11 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs. 0/10 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2020-02-10 22:59:51,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 19 places, 9 transitions [2020-02-10 22:59:51,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 18 places, 9 transitions [2020-02-10 22:59:51,808 INFO L479 AbstractCegarLoop]: Abstraction has has 18 places, 9 transitions [2020-02-10 22:59:51,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-02-10 22:59:51,813 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2020-02-10 22:59:51,813 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-02-10 22:59:51,813 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 22:59:51,813 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-02-10 22:59:51,814 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 22:59:51,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 22:59:51,814 INFO L82 PathProgramCache]: Analyzing trace with hash 965335779, now seen corresponding path program 2 times [2020-02-10 22:59:51,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 22:59:51,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993226268] [2020-02-10 22:59:51,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 22:59:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 22:59:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 22:59:51,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993226268] [2020-02-10 22:59:51,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 22:59:51,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-02-10 22:59:51,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286374267] [2020-02-10 22:59:51,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-02-10 22:59:51,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 22:59:51,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-02-10 22:59:51,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-02-10 22:59:51,876 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 17 [2020-02-10 22:59:51,876 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 9 transitions. Second operand 4 states. [2020-02-10 22:59:51,876 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 22:59:51,876 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 17 [2020-02-10 22:59:51,877 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 22:59:51,908 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2020-02-10 22:59:51,908 INFO L130 PetriNetUnfolder]: For 13/15 co-relation queries the response was YES. [2020-02-10 22:59:51,908 INFO L76 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 10 events. 1/10 cut-off events. For 13/15 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs. 1/11 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2020-02-10 22:59:51,909 INFO L145 encePairwiseOnDemand]: 14/17 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2020-02-10 22:59:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-02-10 22:59:51,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-02-10 22:59:51,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 48 transitions. [2020-02-10 22:59:51,911 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.7058823529411765 [2020-02-10 22:59:51,911 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 48 transitions. [2020-02-10 22:59:51,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 48 transitions. [2020-02-10 22:59:51,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 22:59:51,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 48 transitions. [2020-02-10 22:59:51,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-02-10 22:59:51,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-02-10 22:59:51,914 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-02-10 22:59:51,914 INFO L178 Difference]: Start difference. First operand has 18 places, 9 transitions. Second operand 4 states and 48 transitions. [2020-02-10 22:59:51,914 INFO L206 Difference]: Finished difference. Result has 21 places, 0 transitions [2020-02-10 22:59:51,915 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2020-02-10 22:59:51,916 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 21 places, 0 transitions [2020-02-10 22:59:51,916 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2020-02-10 22:59:51,916 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-02-10 22:59:51,917 INFO L76 FinitePrefix]: Finished finitePrefix Result has 7 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2020-02-10 22:59:51,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 0 transitions [2020-02-10 22:59:51,917 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions [2020-02-10 22:59:51,917 INFO L479 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions [2020-02-10 22:59:51,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-02-10 22:59:51,918 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2020-02-10 22:59:51,918 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-02-10 22:59:51,935 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 10:59:51 BasicIcfg [2020-02-10 22:59:51,935 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-02-10 22:59:51,939 INFO L168 Benchmark]: Toolchain (without parser) took 1135.08 ms. Allocated memory was 137.9 MB in the beginning and 168.8 MB in the end (delta: 30.9 MB). Free memory was 118.5 MB in the beginning and 146.7 MB in the end (delta: -28.1 MB). Peak memory consumption was 64.0 MB. Max. memory is 7.1 GB. [2020-02-10 22:59:51,941 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.40 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. [2020-02-10 22:59:51,944 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.25 ms. Allocated memory is still 137.9 MB. Free memory was 118.3 MB in the beginning and 116.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-02-10 22:59:51,946 INFO L168 Benchmark]: Boogie Preprocessor took 19.40 ms. Allocated memory is still 137.9 MB. Free memory was 116.7 MB in the beginning and 115.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-02-10 22:59:51,947 INFO L168 Benchmark]: RCFGBuilder took 237.42 ms. Allocated memory is still 137.9 MB. Free memory was 115.6 MB in the beginning and 106.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-02-10 22:59:51,948 INFO L168 Benchmark]: TraceAbstraction took 837.07 ms. Allocated memory was 137.9 MB in the beginning and 168.8 MB in the end (delta: 30.9 MB). Free memory was 106.0 MB in the beginning and 146.7 MB in the end (delta: -40.7 MB). Peak memory consumption was 51.5 MB. Max. memory is 7.1 GB. [2020-02-10 22:59:51,957 INFO L336 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 0.40 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 35.25 ms. Allocated memory is still 137.9 MB. Free memory was 118.3 MB in the beginning and 116.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.40 ms. Allocated memory is still 137.9 MB. Free memory was 116.7 MB in the beginning and 115.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 237.42 ms. Allocated memory is still 137.9 MB. Free memory was 115.6 MB in the beginning and 106.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 837.07 ms. Allocated memory was 137.9 MB in the beginning and 168.8 MB in the end (delta: 30.9 MB). Free memory was 106.0 MB in the beginning and 146.7 MB in the end (delta: -40.7 MB). Peak memory consumption was 51.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.0s, 16 ProgramPointsBefore, 14 ProgramPointsAfterwards, 11 TransitionsBefore, 9 TransitionsAfterwards, 20 CoEnabledTransitionPairs, 2 FixpointIterations, 0 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, 2 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: 0.1s, HoareTripleCheckerStatistics: 6 SDtfs, 3 SDslu, 2 SDs, 0 SdLazy, 6 SolverSat, 0 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=9occurred in iteration=0, 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, 22 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s 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...