/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-SemanticLbe.epf -i ../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-abd8500 [2020-01-16 18:30:25,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-01-16 18:30:25,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-01-16 18:30:25,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-01-16 18:30:25,275 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-SemanticLbe.epf [2020-01-16 18:30:25,304 INFO L113 SettingsManager]: Loading preferences was successful [2020-01-16 18:30:25,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-01-16 18:30:25,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-01-16 18:30:25,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-01-16 18:30:25,306 INFO L138 SettingsManager]: * Use SBE=true [2020-01-16 18:30:25,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-01-16 18:30:25,310 INFO L138 SettingsManager]: * sizeof long=4 [2020-01-16 18:30:25,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-01-16 18:30:25,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-01-16 18:30:25,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-01-16 18:30:25,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-01-16 18:30:25,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-01-16 18:30:25,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-01-16 18:30:25,311 INFO L138 SettingsManager]: * sizeof long double=12 [2020-01-16 18:30:25,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-01-16 18:30:25,311 INFO L138 SettingsManager]: * Use constant arrays=true [2020-01-16 18:30:25,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-01-16 18:30:25,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-01-16 18:30:25,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-01-16 18:30:25,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-01-16 18:30:25,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-01-16 18:30:25,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-01-16 18:30:25,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-01-16 18:30:25,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-01-16 18:30:25,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-01-16 18:30:25,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-01-16 18:30:25,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-01-16 18:30:25,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-01-16 18:30:25,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-01-16 18:30:25,595 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-01-16 18:30:25,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-01-16 18:30:25,611 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-01-16 18:30:25,613 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-01-16 18:30:25,613 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-01-16 18:30:25,614 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl [2020-01-16 18:30:25,614 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl' [2020-01-16 18:30:25,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-01-16 18:30:25,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-01-16 18:30:25,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-01-16 18:30:25,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-01-16 18:30:25,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-01-16 18:30:25,660 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 06:30:25" (1/1) ... [2020-01-16 18:30:25,669 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 06:30:25" (1/1) ... [2020-01-16 18:30:25,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-01-16 18:30:25,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-01-16 18:30:25,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-01-16 18:30:25,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-01-16 18:30:25,690 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 06:30:25" (1/1) ... [2020-01-16 18:30:25,690 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 06:30:25" (1/1) ... [2020-01-16 18:30:25,691 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 06:30:25" (1/1) ... [2020-01-16 18:30:25,691 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 06:30:25" (1/1) ... [2020-01-16 18:30:25,694 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 06:30:25" (1/1) ... [2020-01-16 18:30:25,695 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 06:30:25" (1/1) ... [2020-01-16 18:30:25,696 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 06:30:25" (1/1) ... [2020-01-16 18:30:25,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-01-16 18:30:25,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-01-16 18:30:25,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-01-16 18:30:25,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-01-16 18:30:25,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 06:30:25" (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 18:30:25,767 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-01-16 18:30:25,767 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-01-16 18:30:25,767 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-01-16 18:30:25,767 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-01-16 18:30:25,768 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-01-16 18:30:25,768 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-01-16 18:30:25,768 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-01-16 18:30:25,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-01-16 18:30:25,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-01-16 18:30:25,770 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 18:30:25,917 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-01-16 18:30:25,919 INFO L287 CfgBuilder]: Removed 0 assume(true) statements. [2020-01-16 18:30:25,920 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.01 06:30:25 BoogieIcfgContainer [2020-01-16 18:30:25,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-01-16 18:30:25,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-01-16 18:30:25,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-01-16 18:30:25,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-01-16 18:30:25,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 06:30:25" (1/2) ... [2020-01-16 18:30:25,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3272afe6 and model type example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.01 06:30:25, skipping insertion in model container [2020-01-16 18:30:25,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.01 06:30:25" (2/2) ... [2020-01-16 18:30:25,934 INFO L109 eAbstractionObserver]: Analyzing ICFG example_2.bpl [2020-01-16 18:30:25,945 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-01-16 18:30:25,946 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-01-16 18:30:25,953 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-01-16 18:30:25,954 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-01-16 18:30:26,035 INFO L250 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-01-16 18:30:26,055 INFO L374 AbstractCegarLoop]: Interprodecural is true [2020-01-16 18:30:26,055 INFO L375 AbstractCegarLoop]: Hoare is true [2020-01-16 18:30:26,056 INFO L376 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-01-16 18:30:26,056 INFO L377 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-01-16 18:30:26,056 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-01-16 18:30:26,056 INFO L379 AbstractCegarLoop]: Difference is false [2020-01-16 18:30:26,056 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-01-16 18:30:26,057 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-01-16 18:30:26,069 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 15 transitions [2020-01-16 18:30:26,071 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions [2020-01-16 18:30:26,110 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2020-01-16 18:30:26,110 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-01-16 18:30:26,121 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 18:30:26,122 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions [2020-01-16 18:30:26,129 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2020-01-16 18:30:26,129 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-01-16 18:30:26,130 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 18:30:26,131 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 20 [2020-01-16 18:30:26,132 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-01-16 18:30:26,200 INFO L206 etLargeBlockEncoding]: Checked pairs total: 7 [2020-01-16 18:30:26,201 INFO L214 etLargeBlockEncoding]: Total number of compositions: 3 [2020-01-16 18:30:26,207 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 12 transitions [2020-01-16 18:30:26,230 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 14 states. [2020-01-16 18:30:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-01-16 18:30:26,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-01-16 18:30:26,240 INFO L407 BasicCegarLoop]: Found error trace [2020-01-16 18:30:26,241 INFO L415 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-01-16 18:30:26,241 INFO L426 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 18:30:26,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 18:30:26,257 INFO L82 PathProgramCache]: Analyzing trace with hash 994080250, now seen corresponding path program 1 times [2020-01-16 18:30:26,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 18:30:26,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581817265] [2020-01-16 18:30:26,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 18:30:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 18:30:26,516 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 18:30:26,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581817265] [2020-01-16 18:30:26,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 18:30:26,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 18:30:26,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196255200] [2020-01-16 18:30:26,524 INFO L458 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-01-16 18:30:26,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 18:30:26,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-01-16 18:30:26,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-01-16 18:30:26,540 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2020-01-16 18:30:26,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-01-16 18:30:26,595 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2020-01-16 18:30:26,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-01-16 18:30:26,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-01-16 18:30:26,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-01-16 18:30:26,606 INFO L225 Difference]: With dead ends: 18 [2020-01-16 18:30:26,607 INFO L226 Difference]: Without dead ends: 10 [2020-01-16 18:30:26,609 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 18:30:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-01-16 18:30:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-01-16 18:30:26,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-01-16 18:30:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-01-16 18:30:26,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2020-01-16 18:30:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-01-16 18:30:26,639 INFO L478 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-01-16 18:30:26,639 INFO L479 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-01-16 18:30:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-01-16 18:30:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-01-16 18:30:26,640 INFO L407 BasicCegarLoop]: Found error trace [2020-01-16 18:30:26,640 INFO L415 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-01-16 18:30:26,640 INFO L426 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 18:30:26,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 18:30:26,641 INFO L82 PathProgramCache]: Analyzing trace with hash 798353380, now seen corresponding path program 2 times [2020-01-16 18:30:26,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 18:30:26,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444862424] [2020-01-16 18:30:26,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 18:30:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 18:30:26,712 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 18:30:26,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444862424] [2020-01-16 18:30:26,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 18:30:26,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 18:30:26,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780934120] [2020-01-16 18:30:26,718 INFO L458 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-01-16 18:30:26,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 18:30:26,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-01-16 18:30:26,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-01-16 18:30:26,721 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2020-01-16 18:30:26,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-01-16 18:30:26,740 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-01-16 18:30:26,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-01-16 18:30:26,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-01-16 18:30:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-01-16 18:30:26,741 INFO L225 Difference]: With dead ends: 9 [2020-01-16 18:30:26,741 INFO L226 Difference]: Without dead ends: 0 [2020-01-16 18:30:26,742 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 18:30:26,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-01-16 18:30:26,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-01-16 18:30:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-01-16 18:30:26,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-01-16 18:30:26,743 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2020-01-16 18:30:26,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-01-16 18:30:26,744 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-01-16 18:30:26,744 INFO L479 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-01-16 18:30:26,744 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-01-16 18:30:26,744 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-01-16 18:30:26,748 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.01 06:30:26 BasicIcfg [2020-01-16 18:30:26,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-01-16 18:30:26,751 INFO L168 Benchmark]: Toolchain (without parser) took 1105.10 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 68.7 MB in the end (delta: 52.2 MB). Peak memory consumption was 52.2 MB. Max. memory is 7.1 GB. [2020-01-16 18:30:26,753 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-01-16 18:30:26,754 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.75 ms. Allocated memory is still 145.8 MB. Free memory was 120.6 MB in the beginning and 119.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-01-16 18:30:26,755 INFO L168 Benchmark]: Boogie Preprocessor took 18.35 ms. Allocated memory is still 145.8 MB. Free memory was 119.0 MB in the beginning and 118.0 MB in the end (delta: 936.0 kB). Peak memory consumption was 936.0 kB. Max. memory is 7.1 GB. [2020-01-16 18:30:26,756 INFO L168 Benchmark]: RCFGBuilder took 223.32 ms. Allocated memory is still 145.8 MB. Free memory was 117.8 MB in the beginning and 108.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-01-16 18:30:26,757 INFO L168 Benchmark]: TraceAbstraction took 827.31 ms. Allocated memory is still 145.8 MB. Free memory was 108.2 MB in the beginning and 68.7 MB in the end (delta: 39.5 MB). Peak memory consumption was 39.5 MB. Max. memory is 7.1 GB. [2020-01-16 18:30:26,761 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 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 31.75 ms. Allocated memory is still 145.8 MB. Free memory was 120.6 MB in the beginning and 119.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 18.35 ms. Allocated memory is still 145.8 MB. Free memory was 119.0 MB in the beginning and 118.0 MB in the end (delta: 936.0 kB). Peak memory consumption was 936.0 kB. Max. memory is 7.1 GB. * RCFGBuilder took 223.32 ms. Allocated memory is still 145.8 MB. Free memory was 117.8 MB in the beginning and 108.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 827.31 ms. Allocated memory is still 145.8 MB. Free memory was 108.2 MB in the beginning and 68.7 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...