/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/example_interleaving_simple.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 14:37:39,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 14:37:39,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 14:37:39,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-10 14:37:39,259 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-06-10 14:37:39,299 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 14:37:39,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 14:37:39,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 14:37:39,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 14:37:39,302 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 14:37:39,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 14:37:39,303 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 14:37:39,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 14:37:39,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 14:37:39,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 14:37:39,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 14:37:39,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 14:37:39,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 14:37:39,304 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 14:37:39,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 14:37:39,305 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 14:37:39,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 14:37:39,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 14:37:39,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 14:37:39,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 14:37:39,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 14:37:39,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 14:37:39,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 14:37:39,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 14:37:39,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 14:37:39,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 14:37:39,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 14:37:39,306 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 14:37:39,306 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 14:37:39,306 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 14:37:39,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 14:37:39,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 14:37:39,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 14:37:39,631 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 14:37:39,633 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 14:37:39,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_interleaving_simple.bpl [2021-06-10 14:37:39,634 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_interleaving_simple.bpl' [2021-06-10 14:37:39,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 14:37:39,669 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 14:37:39,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 14:37:39,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 14:37:39,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 14:37:39,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:39" (1/1) ... [2021-06-10 14:37:39,687 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:39" (1/1) ... [2021-06-10 14:37:39,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 14:37:39,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 14:37:39,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 14:37:39,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 14:37:39,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:39" (1/1) ... [2021-06-10 14:37:39,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:39" (1/1) ... [2021-06-10 14:37:39,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:39" (1/1) ... [2021-06-10 14:37:39,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:39" (1/1) ... [2021-06-10 14:37:39,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:39" (1/1) ... [2021-06-10 14:37:39,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:39" (1/1) ... [2021-06-10 14:37:39,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:39" (1/1) ... [2021-06-10 14:37:39,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 14:37:39,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 14:37:39,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 14:37:39,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 14:37:39,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:39" (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 [2021-06-10 14:37:39,764 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 14:37:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 14:37:39,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 14:37:39,766 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_x given in one single declaration [2021-06-10 14:37:39,767 INFO L130 BoogieDeclarations]: Found specification of procedure set_x [2021-06-10 14:37:39,767 INFO L138 BoogieDeclarations]: Found implementation of procedure set_x [2021-06-10 14:37:39,767 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 14:37:39,856 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 14:37:39,856 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 14:37:39,858 INFO L202 PluginConnector]: Adding new model example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:37:39 BoogieIcfgContainer [2021-06-10 14:37:39,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 14:37:39,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 14:37:39,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 14:37:39,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 14:37:39,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:39" (1/2) ... [2021-06-10 14:37:39,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ebd9202 and model type example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 02:37:39, skipping insertion in model container [2021-06-10 14:37:39,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:37:39" (2/2) ... [2021-06-10 14:37:39,864 INFO L111 eAbstractionObserver]: Analyzing ICFG example_interleaving_simple.bpl [2021-06-10 14:37:39,869 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 14:37:39,872 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 14:37:39,873 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 14:37:39,893 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-06-10 14:37:39,906 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:37:39,923 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:37:39,923 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:37:39,923 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:37:39,923 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:37:39,924 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:37:39,924 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:37:39,924 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:37:39,924 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:37:39,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 9 transitions, 26 flow [2021-06-10 14:37:39,942 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-06-10 14:37:39,942 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-06-10 14:37:39,944 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 2. Compared 3 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. [2021-06-10 14:37:39,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 13 places, 9 transitions, 26 flow [2021-06-10 14:37:39,947 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 10 places, 6 transitions, 18 flow [2021-06-10 14:37:39,949 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-06-10 14:37:39,950 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-06-10 14:37:39,950 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:39,950 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-10 14:37:39,951 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:39,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:39,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1442109907, now seen corresponding path program 1 times [2021-06-10 14:37:39,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:39,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585182220] [2021-06-10 14:37:39,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:40,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:40,093 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:37:40,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:40,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:37:40,133 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-06-10 14:37:40,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 14:37:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:37:40,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585182220] [2021-06-10 14:37:40,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:40,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 14:37:40,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176261167] [2021-06-10 14:37:40,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 14:37:40,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:40,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 14:37:40,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-10 14:37:40,201 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 9 [2021-06-10 14:37:40,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 10 places, 6 transitions, 18 flow. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-06-10 14:37:40,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:40,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 9 [2021-06-10 14:37:40,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:40,263 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-06-10 14:37:40,263 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-10 14:37:40,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 10 events. 0/10 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-10 14:37:40,264 INFO L132 encePairwiseOnDemand]: 6/9 looper letters, 2 selfloop transitions, 1 changer transitions 1/7 dead transitions. [2021-06-10 14:37:40,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 7 transitions, 28 flow [2021-06-10 14:37:40,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-10 14:37:40,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-10 14:37:40,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2021-06-10 14:37:40,273 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2021-06-10 14:37:40,273 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 25 transitions. [2021-06-10 14:37:40,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 25 transitions. [2021-06-10 14:37:40,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:40,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 25 transitions. [2021-06-10 14:37:40,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-06-10 14:37:40,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-06-10 14:37:40,280 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-06-10 14:37:40,298 INFO L185 Difference]: Start difference. First operand has 10 places, 6 transitions, 18 flow. Second operand 4 states and 25 transitions. [2021-06-10 14:37:40,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 7 transitions, 28 flow [2021-06-10 14:37:40,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 7 transitions, 24 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 14:37:40,301 INFO L241 Difference]: Finished difference. Result has 13 places, 6 transitions, 21 flow [2021-06-10 14:37:40,303 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=9, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=8, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=21, PETRI_PLACES=13, PETRI_TRANSITIONS=6} [2021-06-10 14:37:40,303 INFO L343 CegarLoopForPetriNet]: 10 programPoint places, 3 predicate places. [2021-06-10 14:37:40,304 INFO L480 AbstractCegarLoop]: Abstraction has has 13 places, 6 transitions, 21 flow [2021-06-10 14:37:40,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-06-10 14:37:40,304 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:40,304 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-10 14:37:40,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 14:37:40,304 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1446578557, now seen corresponding path program 2 times [2021-06-10 14:37:40,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:40,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037697104] [2021-06-10 14:37:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:40,349 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:40,349 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:37:40,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:40,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:37:40,359 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-06-10 14:37:40,364 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 14:37:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:37:40,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037697104] [2021-06-10 14:37:40,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:40,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 14:37:40,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331009613] [2021-06-10 14:37:40,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 14:37:40,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:40,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 14:37:40,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-10 14:37:40,381 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 9 [2021-06-10 14:37:40,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 6 transitions, 21 flow. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-06-10 14:37:40,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:40,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 9 [2021-06-10 14:37:40,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:40,409 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-06-10 14:37:40,409 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-06-10 14:37:40,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18 conditions, 6 events. 0/6 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/7 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 14:37:40,410 INFO L132 encePairwiseOnDemand]: 6/9 looper letters, 0 selfloop transitions, 0 changer transitions 6/6 dead transitions. [2021-06-10 14:37:40,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 6 transitions, 28 flow [2021-06-10 14:37:40,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-10 14:37:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-10 14:37:40,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 24 transitions. [2021-06-10 14:37:40,411 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2021-06-10 14:37:40,411 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 24 transitions. [2021-06-10 14:37:40,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 24 transitions. [2021-06-10 14:37:40,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:40,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 24 transitions. [2021-06-10 14:37:40,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2021-06-10 14:37:40,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-06-10 14:37:40,412 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-06-10 14:37:40,412 INFO L185 Difference]: Start difference. First operand has 13 places, 6 transitions, 21 flow. Second operand 4 states and 24 transitions. [2021-06-10 14:37:40,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 6 transitions, 28 flow [2021-06-10 14:37:40,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 6 transitions, 26 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-10 14:37:40,413 INFO L241 Difference]: Finished difference. Result has 13 places, 0 transitions, 0 flow [2021-06-10 14:37:40,413 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=9, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=13, PETRI_TRANSITIONS=0} [2021-06-10 14:37:40,414 INFO L343 CegarLoopForPetriNet]: 10 programPoint places, 3 predicate places. [2021-06-10 14:37:40,414 INFO L480 AbstractCegarLoop]: Abstraction has has 13 places, 0 transitions, 0 flow [2021-06-10 14:37:40,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-06-10 14:37:40,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 14:37:40,418 INFO L202 PluginConnector]: Adding new model example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 02:37:40 BasicIcfg [2021-06-10 14:37:40,418 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 14:37:40,419 INFO L168 Benchmark]: Toolchain (without parser) took 749.08 ms. Allocated memory is still 339.7 MB. Free memory was 319.5 MB in the beginning and 302.0 MB in the end (delta: 17.6 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.0 GB. [2021-06-10 14:37:40,419 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 339.7 MB. Free memory was 320.5 MB in the beginning and 320.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:37:40,420 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.18 ms. Allocated memory is still 339.7 MB. Free memory was 319.5 MB in the beginning and 318.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 14:37:40,425 INFO L168 Benchmark]: Boogie Preprocessor took 14.42 ms. Allocated memory is still 339.7 MB. Free memory was 318.0 MB in the beginning and 317.2 MB in the end (delta: 830.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:37:40,427 INFO L168 Benchmark]: RCFGBuilder took 149.17 ms. Allocated memory is still 339.7 MB. Free memory was 317.1 MB in the beginning and 309.2 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-10 14:37:40,429 INFO L168 Benchmark]: TraceAbstraction took 558.81 ms. Allocated memory is still 339.7 MB. Free memory was 308.8 MB in the beginning and 302.0 MB in the end (delta: 6.8 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.0 GB. [2021-06-10 14:37:40,435 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 0.14 ms. Allocated memory is still 339.7 MB. Free memory was 320.5 MB in the beginning and 320.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.18 ms. Allocated memory is still 339.7 MB. Free memory was 319.5 MB in the beginning and 318.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.42 ms. Allocated memory is still 339.7 MB. Free memory was 318.0 MB in the beginning and 317.2 MB in the end (delta: 830.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 149.17 ms. Allocated memory is still 339.7 MB. Free memory was 317.1 MB in the beginning and 309.2 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 558.81 ms. Allocated memory is still 339.7 MB. Free memory was 308.8 MB in the beginning and 302.0 MB in the end (delta: 6.8 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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: 2.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 495.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 139.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6 SDtfs, 3 SDslu, 2 SDs, 0 SdLazy, 6 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=1, InterpolantAutomatonStates: 8, 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: 14.2ms SsaConstructionTime, 16.5ms SatisfiabilityAnalysisTime, 191.8ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 70 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, 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...