/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-FA-VariableLbe.epf -i ../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-abd8500 [2020-01-16 18:58:37,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-01-16 18:58:37,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-01-16 18:58:37,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-01-16 18:58:37,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-01-16 18:58:37,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-01-16 18:58:37,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-01-16 18:58:37,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-01-16 18:58:37,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-01-16 18:58:37,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-01-16 18:58:37,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-01-16 18:58:37,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-01-16 18:58:37,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-01-16 18:58:37,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-01-16 18:58:37,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-01-16 18:58:37,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-01-16 18:58:37,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-01-16 18:58:37,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-01-16 18:58:37,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-01-16 18:58:37,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-01-16 18:58:37,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-01-16 18:58:37,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-01-16 18:58:37,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-01-16 18:58:37,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-01-16 18:58:37,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-01-16 18:58:37,474 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-FA-VariableLbe.epf [2020-01-16 18:58:37,488 INFO L113 SettingsManager]: Loading preferences was successful [2020-01-16 18:58:37,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-01-16 18:58:37,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-01-16 18:58:37,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-01-16 18:58:37,490 INFO L138 SettingsManager]: * Use SBE=true [2020-01-16 18:58:37,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-01-16 18:58:37,491 INFO L138 SettingsManager]: * sizeof long=4 [2020-01-16 18:58:37,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-01-16 18:58:37,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-01-16 18:58:37,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-01-16 18:58:37,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-01-16 18:58:37,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-01-16 18:58:37,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-01-16 18:58:37,492 INFO L138 SettingsManager]: * sizeof long double=12 [2020-01-16 18:58:37,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-01-16 18:58:37,493 INFO L138 SettingsManager]: * Use constant arrays=true [2020-01-16 18:58:37,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-01-16 18:58:37,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-01-16 18:58:37,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-01-16 18:58:37,493 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-01-16 18:58:37,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-01-16 18:58:37,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-01-16 18:58:37,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-01-16 18:58:37,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-01-16 18:58:37,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-01-16 18:58:37,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-01-16 18:58:37,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-01-16 18:58:37,496 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-01-16 18:58:37,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-01-16 18:58:37,497 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-01-16 18:58:37,794 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-01-16 18:58:37,807 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-01-16 18:58:37,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-01-16 18:58:37,811 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-01-16 18:58:37,812 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-01-16 18:58:37,813 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl [2020-01-16 18:58:37,813 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl' [2020-01-16 18:58:37,842 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-01-16 18:58:37,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-01-16 18:58:37,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-01-16 18:58:37,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-01-16 18:58:37,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-01-16 18:58:37,861 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 06:58:37" (1/1) ... [2020-01-16 18:58:37,870 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 06:58:37" (1/1) ... [2020-01-16 18:58:37,879 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-01-16 18:58:37,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-01-16 18:58:37,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-01-16 18:58:37,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-01-16 18:58:37,891 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 06:58:37" (1/1) ... [2020-01-16 18:58:37,891 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 06:58:37" (1/1) ... [2020-01-16 18:58:37,892 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 06:58:37" (1/1) ... [2020-01-16 18:58:37,892 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 06:58:37" (1/1) ... [2020-01-16 18:58:37,895 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 06:58:37" (1/1) ... [2020-01-16 18:58:37,896 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 06:58:37" (1/1) ... [2020-01-16 18:58:37,897 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 06:58:37" (1/1) ... [2020-01-16 18:58:37,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-01-16 18:58:37,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-01-16 18:58:37,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-01-16 18:58:37,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-01-16 18:58:37,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 06:58:37" (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 18:58:37,969 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-01-16 18:58:37,969 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-01-16 18:58:37,969 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-01-16 18:58:37,970 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-01-16 18:58:37,970 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-01-16 18:58:37,970 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-01-16 18:58:37,970 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-01-16 18:58:37,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-01-16 18:58:37,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-01-16 18:58:37,972 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 18:58:38,111 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-01-16 18:58:38,112 INFO L287 CfgBuilder]: Removed 0 assume(true) statements. [2020-01-16 18:58:38,114 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.01 06:58:38 BoogieIcfgContainer [2020-01-16 18:58:38,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-01-16 18:58:38,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-01-16 18:58:38,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-01-16 18:58:38,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-01-16 18:58:38,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 06:58:37" (1/2) ... [2020-01-16 18:58:38,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d23ef2 and model type example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.01 06:58:38, skipping insertion in model container [2020-01-16 18:58:38,125 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 06:58:38" (2/2) ... [2020-01-16 18:58:38,127 INFO L109 eAbstractionObserver]: Analyzing ICFG example_2.bpl [2020-01-16 18:58:38,139 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-01-16 18:58:38,139 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-01-16 18:58:38,147 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-01-16 18:58:38,148 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-01-16 18:58:38,228 INFO L250 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-01-16 18:58:38,269 INFO L374 AbstractCegarLoop]: Interprodecural is true [2020-01-16 18:58:38,269 INFO L375 AbstractCegarLoop]: Hoare is true [2020-01-16 18:58:38,269 INFO L376 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-01-16 18:58:38,270 INFO L377 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-01-16 18:58:38,270 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-01-16 18:58:38,270 INFO L379 AbstractCegarLoop]: Difference is false [2020-01-16 18:58:38,270 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-01-16 18:58:38,271 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-01-16 18:58:38,290 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 15 transitions [2020-01-16 18:58:38,292 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions [2020-01-16 18:58:38,329 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2020-01-16 18:58:38,330 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-01-16 18:58:38,334 INFO L76 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 13 events. 1/13 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs. 0/12 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2020-01-16 18:58:38,336 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions [2020-01-16 18:58:38,349 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2020-01-16 18:58:38,349 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-01-16 18:58:38,350 INFO L76 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 13 events. 1/13 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs. 0/12 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2020-01-16 18:58:38,351 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 20 [2020-01-16 18:58:38,352 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-01-16 18:58:38,408 INFO L206 etLargeBlockEncoding]: Checked pairs total: 7 [2020-01-16 18:58:38,408 INFO L214 etLargeBlockEncoding]: Total number of compositions: 3 [2020-01-16 18:58:38,412 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 12 transitions [2020-01-16 18:58:38,421 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 14 states. [2020-01-16 18:58:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-01-16 18:58:38,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-01-16 18:58:38,430 INFO L407 BasicCegarLoop]: Found error trace [2020-01-16 18:58:38,431 INFO L415 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-01-16 18:58:38,431 INFO L426 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 18:58:38,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 18:58:38,438 INFO L82 PathProgramCache]: Analyzing trace with hash 994080250, now seen corresponding path program 1 times [2020-01-16 18:58:38,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 18:58:38,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216281977] [2020-01-16 18:58:38,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 18:58:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 18:58:38,706 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 18:58:38,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216281977] [2020-01-16 18:58:38,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 18:58:38,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 18:58:38,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907279415] [2020-01-16 18:58:38,718 INFO L458 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-01-16 18:58:38,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 18:58:38,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-01-16 18:58:38,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-01-16 18:58:38,740 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2020-01-16 18:58:38,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-01-16 18:58:38,788 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2020-01-16 18:58:38,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-01-16 18:58:38,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-01-16 18:58:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-01-16 18:58:38,800 INFO L225 Difference]: With dead ends: 18 [2020-01-16 18:58:38,800 INFO L226 Difference]: Without dead ends: 10 [2020-01-16 18:58:38,802 INFO L633 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-01-16 18:58:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-01-16 18:58:38,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-01-16 18:58:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-01-16 18:58:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-01-16 18:58:38,840 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2020-01-16 18:58:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-01-16 18:58:38,840 INFO L478 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-01-16 18:58:38,841 INFO L479 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-01-16 18:58:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-01-16 18:58:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-01-16 18:58:38,841 INFO L407 BasicCegarLoop]: Found error trace [2020-01-16 18:58:38,842 INFO L415 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-01-16 18:58:38,842 INFO L426 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 18:58:38,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 18:58:38,843 INFO L82 PathProgramCache]: Analyzing trace with hash 798353380, now seen corresponding path program 2 times [2020-01-16 18:58:38,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 18:58:38,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511129056] [2020-01-16 18:58:38,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 18:58:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 18:58:38,921 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 18:58:38,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511129056] [2020-01-16 18:58:38,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 18:58:38,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 18:58:38,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930048167] [2020-01-16 18:58:38,924 INFO L458 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-01-16 18:58:38,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 18:58:38,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-01-16 18:58:38,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-01-16 18:58:38,926 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2020-01-16 18:58:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-01-16 18:58:38,952 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-01-16 18:58:38,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-01-16 18:58:38,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-01-16 18:58:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-01-16 18:58:38,953 INFO L225 Difference]: With dead ends: 9 [2020-01-16 18:58:38,953 INFO L226 Difference]: Without dead ends: 0 [2020-01-16 18:58:38,954 INFO L633 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-01-16 18:58:38,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-01-16 18:58:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-01-16 18:58:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-01-16 18:58:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-01-16 18:58:38,956 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2020-01-16 18:58:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-01-16 18:58:38,956 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-01-16 18:58:38,956 INFO L479 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-01-16 18:58:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-01-16 18:58:38,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-01-16 18:58:38,961 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.01 06:58:38 BasicIcfg [2020-01-16 18:58:38,961 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-01-16 18:58:38,964 INFO L168 Benchmark]: Toolchain (without parser) took 1119.49 ms. Allocated memory is still 144.7 MB. Free memory was 119.8 MB in the beginning and 67.6 MB in the end (delta: 52.2 MB). Peak memory consumption was 52.2 MB. Max. memory is 7.1 GB. [2020-01-16 18:58:38,965 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 144.7 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-01-16 18:58:38,966 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.87 ms. Allocated memory is still 144.7 MB. Free memory was 119.4 MB in the beginning and 117.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-01-16 18:58:38,967 INFO L168 Benchmark]: Boogie Preprocessor took 17.80 ms. Allocated memory is still 144.7 MB. Free memory was 117.7 MB in the beginning and 116.9 MB in the end (delta: 839.2 kB). Peak memory consumption was 839.2 kB. Max. memory is 7.1 GB. [2020-01-16 18:58:38,968 INFO L168 Benchmark]: RCFGBuilder took 219.51 ms. Allocated memory is still 144.7 MB. Free memory was 116.9 MB in the beginning and 107.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-01-16 18:58:38,969 INFO L168 Benchmark]: TraceAbstraction took 841.40 ms. Allocated memory is still 144.7 MB. Free memory was 107.1 MB in the beginning and 67.6 MB in the end (delta: 39.5 MB). Peak memory consumption was 39.5 MB. Max. memory is 7.1 GB. [2020-01-16 18:58:38,973 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 144.7 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 34.87 ms. Allocated memory is still 144.7 MB. Free memory was 119.4 MB in the beginning and 117.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 17.80 ms. Allocated memory is still 144.7 MB. Free memory was 117.7 MB in the beginning and 116.9 MB in the end (delta: 839.2 kB). Peak memory consumption was 839.2 kB. Max. memory is 7.1 GB. * RCFGBuilder took 219.51 ms. Allocated memory is still 144.7 MB. Free memory was 116.9 MB in the beginning and 107.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 841.40 ms. Allocated memory is still 144.7 MB. Free memory was 107.1 MB in the beginning and 67.6 MB in the end (delta: 39.5 MB). Peak memory consumption was 39.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.1s, 20 ProgramPointsBefore, 16 ProgramPointsAfterwards, 15 TransitionsBefore, 12 TransitionsAfterwards, 20 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 VarBasedMoverChecksPositive, 0 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 7 CheckedPairsTotal, 3 TotalNumberOfCompositions - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. Result: SAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 21 SDtfs, 21 SDslu, 17 SDs, 0 SdLazy, 6 SolverSat, 1 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=14occurred 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, 0 StatesRemovedByMinimization, 0 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, 432 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...