/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/LBE_example_semanticCheck.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 22:20:05,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 22:20:05,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 22:20:05,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-24 22:20:05,154 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 [2021-03-24 22:20:05,173 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 22:20:05,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 22:20:05,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 22:20:05,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 22:20:05,175 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 22:20:05,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 22:20:05,175 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 22:20:05,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 22:20:05,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 22:20:05,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 22:20:05,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 22:20:05,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 22:20:05,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 22:20:05,176 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 22:20:05,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 22:20:05,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 22:20:05,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 22:20:05,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 22:20:05,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 22:20:05,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 22:20:05,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 22:20:05,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 22:20:05,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 22:20:05,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 22:20:05,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 22:20:05,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 22:20:05,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 22:20:05,178 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 22:20:05,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 22:20:05,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 22:20:05,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 22:20:05,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 22:20:05,505 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 22:20:05,506 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 22:20:05,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/LBE_example_semanticCheck.bpl [2021-03-24 22:20:05,507 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/LBE_example_semanticCheck.bpl' [2021-03-24 22:20:05,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 22:20:05,533 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 22:20:05,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 22:20:05,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 22:20:05,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 22:20:05,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:05" (1/1) ... [2021-03-24 22:20:05,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:05" (1/1) ... [2021-03-24 22:20:05,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 22:20:05,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 22:20:05,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 22:20:05,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 22:20:05,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:05" (1/1) ... [2021-03-24 22:20:05,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:05" (1/1) ... [2021-03-24 22:20:05,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:05" (1/1) ... [2021-03-24 22:20:05,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:05" (1/1) ... [2021-03-24 22:20:05,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:05" (1/1) ... [2021-03-24 22:20:05,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:05" (1/1) ... [2021-03-24 22:20:05,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:05" (1/1) ... [2021-03-24 22:20:05,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 22:20:05,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 22:20:05,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 22:20:05,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 22:20:05,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:05" (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 [2021-03-24 22:20:05,648 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-24 22:20:05,648 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-24 22:20:05,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 22:20:05,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 22:20:05,651 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 22:20:05,801 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 22:20:05,801 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 22:20:05,802 INFO L202 PluginConnector]: Adding new model LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:20:05 BoogieIcfgContainer [2021-03-24 22:20:05,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 22:20:05,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 22:20:05,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 22:20:05,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 22:20:05,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:20:05" (1/2) ... [2021-03-24 22:20:05,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65151f52 and model type LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 10:20:05, skipping insertion in model container [2021-03-24 22:20:05,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:20:05" (2/2) ... [2021-03-24 22:20:05,811 INFO L111 eAbstractionObserver]: Analyzing ICFG LBE_example_semanticCheck.bpl [2021-03-24 22:20:05,818 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 22:20:05,821 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 22:20:05,822 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 22:20:05,855 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-03-24 22:20:05,872 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:20:05,913 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:20:05,914 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:20:05,914 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:20:05,915 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:20:05,915 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:20:05,916 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:20:05,916 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:20:05,916 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:20:05,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 9 transitions, 26 flow [2021-03-24 22:20:05,941 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-24 22:20:05,941 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-24 22:20:05,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13 conditions, 8 events. 0/8 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 6 event pairs, 0 based on Foata normal form. 0/7 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 22:20:05,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 13 places, 9 transitions, 26 flow [2021-03-24 22:20:05,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 9 places, 5 transitions, 13 flow [2021-03-24 22:20:05,950 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:20:05,961 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 9 places, 5 transitions, 13 flow [2021-03-24 22:20:05,966 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 9 places, 5 transitions, 13 flow [2021-03-24 22:20:05,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 9 places, 5 transitions, 13 flow [2021-03-24 22:20:05,969 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-03-24 22:20:05,970 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:20:05,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9 conditions, 5 events. 0/5 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 0/5 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-24 22:20:05,972 INFO L142 LiptonReduction]: Number of co-enabled transitions 8 [2021-03-24 22:20:06,069 INFO L154 LiptonReduction]: Checked pairs total: 4 [2021-03-24 22:20:06,070 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-24 22:20:06,071 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 122 [2021-03-24 22:20:06,091 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:20:06,091 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:20:06,092 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:20:06,092 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:20:06,092 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:20:06,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:20:06,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1571, now seen corresponding path program 1 times [2021-03-24 22:20:06,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:20:06,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868324140] [2021-03-24 22:20:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:20:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:20:06,198 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:20:06,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:20:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:20:06,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868324140] [2021-03-24 22:20:06,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:20:06,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:20:06,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850362500] [2021-03-24 22:20:06,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-03-24 22:20:06,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:20:06,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-03-24 22:20:06,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-03-24 22:20:06,224 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 11 [2021-03-24 22:20:06,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 7 places, 3 transitions, 9 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:20:06,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:20:06,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 11 [2021-03-24 22:20:06,227 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:20:06,230 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:20:06,230 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:20:06,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7 conditions, 2 events. 0/2 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/3 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-24 22:20:06,231 INFO L132 encePairwiseOnDemand]: 10/11 looper letters, 0 selfloop transitions, 0 changer transitions 2/2 dead transitions. [2021-03-24 22:20:06,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 7 places, 2 transitions, 7 flow [2021-03-24 22:20:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-24 22:20:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-03-24 22:20:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 21 transitions. [2021-03-24 22:20:06,238 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9545454545454546 [2021-03-24 22:20:06,239 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 21 transitions. [2021-03-24 22:20:06,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 21 transitions. [2021-03-24 22:20:06,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:20:06,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 21 transitions. [2021-03-24 22:20:06,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:20:06,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:20:06,253 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:20:06,255 INFO L185 Difference]: Start difference. First operand has 7 places, 3 transitions, 9 flow. Second operand 2 states and 21 transitions. [2021-03-24 22:20:06,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 7 places, 2 transitions, 7 flow [2021-03-24 22:20:06,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 6 places, 2 transitions, 6 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 22:20:06,259 INFO L241 Difference]: Finished difference. Result has 6 places, 0 transitions, 0 flow [2021-03-24 22:20:06,260 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=11, PETRI_DIFFERENCE_MINUEND_FLOW=6, PETRI_DIFFERENCE_MINUEND_PLACES=5, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=6, PETRI_TRANSITIONS=0} [2021-03-24 22:20:06,261 INFO L343 CegarLoopForPetriNet]: 7 programPoint places, -1 predicate places. [2021-03-24 22:20:06,261 INFO L480 AbstractCegarLoop]: Abstraction has has 6 places, 0 transitions, 0 flow [2021-03-24 22:20:06,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:20:06,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 22:20:06,266 INFO L202 PluginConnector]: Adding new model LBE_example_semanticCheck.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 10:20:06 BasicIcfg [2021-03-24 22:20:06,266 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 22:20:06,268 INFO L168 Benchmark]: Toolchain (without parser) took 733.98 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 217.5 MB in the end (delta: 19.2 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.0 GB. [2021-03-24 22:20:06,269 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:20:06,270 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.03 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 22:20:06,271 INFO L168 Benchmark]: Boogie Preprocessor took 14.02 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.3 MB in the end (delta: 806.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:20:06,271 INFO L168 Benchmark]: RCFGBuilder took 228.53 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 240.4 MB in the end (delta: -6.3 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-03-24 22:20:06,272 INFO L168 Benchmark]: TraceAbstraction took 460.50 ms. Allocated memory is still 255.9 MB. Free memory was 240.0 MB in the beginning and 217.5 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-03-24 22:20:06,279 INFO L339 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 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.03 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.02 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.3 MB in the end (delta: 806.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 228.53 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 240.4 MB in the end (delta: -6.3 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 460.50 ms. Allocated memory is still 255.9 MB. Free memory was 240.0 MB in the beginning and 217.5 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 103.9ms, 9 PlacesBefore, 7 PlacesAfterwards, 5 TransitionsBefore, 3 TransitionsAfterwards, 8 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 4 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 4, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 4, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 4, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 30, positive: 30, positive conditional: 0, positive unconditional: 30, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 4, unknown conditional: 0, unknown unconditional: 4] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 357.8ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 40.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 173.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 0 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.3ms SsaConstructionTime, 7.0ms SatisfiabilityAnalysisTime, 24.5ms InterpolantComputationTime, 2 NumberOfCodeBlocks, 2 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 1 ConstructedInterpolants, 0 QuantifiedInterpolants, 1 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...