/usr/bin/java -Xmx8000000000 -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.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-13 08:21:54,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-13 08:21:54,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-13 08:21:54,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-13 08:21:55,026 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 [2021-06-13 08:21:55,048 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-13 08:21:55,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-13 08:21:55,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-13 08:21:55,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-13 08:21:55,051 INFO L138 SettingsManager]: * Use SBE=true [2021-06-13 08:21:55,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-13 08:21:55,051 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-13 08:21:55,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-13 08:21:55,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-13 08:21:55,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-13 08:21:55,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-13 08:21:55,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-13 08:21:55,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-13 08:21:55,053 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-13 08:21:55,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-13 08:21:55,053 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-13 08:21:55,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-13 08:21:55,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-13 08:21:55,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-13 08:21:55,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-13 08:21:55,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-13 08:21:55,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 08:21:55,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-13 08:21:55,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-13 08:21:55,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-13 08:21:55,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-13 08:21:55,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-13 08:21:55,054 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-13 08:21:55,054 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-13 08:21:55,055 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-13 08:21:55,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-13 08:21:55,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-13 08:21:55,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-13 08:21:55,318 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-13 08:21:55,318 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-13 08:21:55,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_interleaving.bpl [2021-06-13 08:21:55,319 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_interleaving.bpl' [2021-06-13 08:21:55,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-13 08:21:55,364 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-13 08:21:55,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-13 08:21:55,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-13 08:21:55,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-13 08:21:55,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:21:55" (1/1) ... [2021-06-13 08:21:55,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:21:55" (1/1) ... [2021-06-13 08:21:55,382 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-13 08:21:55,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-13 08:21:55,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-13 08:21:55,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-13 08:21:55,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:21:55" (1/1) ... [2021-06-13 08:21:55,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:21:55" (1/1) ... [2021-06-13 08:21:55,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:21:55" (1/1) ... [2021-06-13 08:21:55,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:21:55" (1/1) ... [2021-06-13 08:21:55,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:21:55" (1/1) ... [2021-06-13 08:21:55,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:21:55" (1/1) ... [2021-06-13 08:21:55,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:21:55" (1/1) ... [2021-06-13 08:21:55,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-13 08:21:55,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-13 08:21:55,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-13 08:21:55,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-13 08:21:55,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:21:55" (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 [2021-06-13 08:21:55,437 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_y given in one single declaration [2021-06-13 08:21:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure set_y [2021-06-13 08:21:55,437 INFO L138 BoogieDeclarations]: Found implementation of procedure set_y [2021-06-13 08:21:55,437 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_z given in one single declaration [2021-06-13 08:21:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure set_z [2021-06-13 08:21:55,437 INFO L138 BoogieDeclarations]: Found implementation of procedure set_z [2021-06-13 08:21:55,437 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-13 08:21:55,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-13 08:21:55,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-13 08:21:55,438 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_x given in one single declaration [2021-06-13 08:21:55,438 INFO L130 BoogieDeclarations]: Found specification of procedure set_x [2021-06-13 08:21:55,438 INFO L138 BoogieDeclarations]: Found implementation of procedure set_x [2021-06-13 08:21:55,438 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-13 08:21:55,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-13 08:21:55,550 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-13 08:21:55,551 INFO L202 PluginConnector]: Adding new model example_interleaving.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 08:21:55 BoogieIcfgContainer [2021-06-13 08:21:55,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-13 08:21:55,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-13 08:21:55,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-13 08:21:55,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-13 08:21:55,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:21:55" (1/2) ... [2021-06-13 08:21:55,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f72d0e5 and model type example_interleaving.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 08:21:55, skipping insertion in model container [2021-06-13 08:21:55,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 08:21:55" (2/2) ... [2021-06-13 08:21:55,557 INFO L111 eAbstractionObserver]: Analyzing ICFG example_interleaving.bpl [2021-06-13 08:21:55,563 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-13 08:21:55,564 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-13 08:21:55,564 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-13 08:21:55,608 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-06-13 08:21:55,622 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-13 08:21:55,635 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 08:21:55,635 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 08:21:55,635 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 08:21:55,636 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 08:21:55,636 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 08:21:55,636 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 08:21:55,636 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 08:21:55,636 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-13 08:21:55,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 90 flow [2021-06-13 08:21:55,656 INFO L129 PetriNetUnfolder]: 5/24 cut-off events. [2021-06-13 08:21:55,656 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-06-13 08:21:55,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 24 events. 5/24 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2021-06-13 08:21:55,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 90 flow [2021-06-13 08:21:55,661 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 19 transitions, 74 flow [2021-06-13 08:21:55,666 INFO L129 PetriNetUnfolder]: 5/21 cut-off events. [2021-06-13 08:21:55,666 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-06-13 08:21:55,666 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:21:55,667 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:21:55,667 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:21:55,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:21:55,671 INFO L82 PathProgramCache]: Analyzing trace with hash -112730288, now seen corresponding path program 1 times [2021-06-13 08:21:55,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:21:55,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312836053] [2021-06-13 08:21:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:21:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:21:55,761 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:55,762 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:21:55,769 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:55,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 08:21:55,777 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:55,777 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:21:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:21:55,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:21:55,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312836053] [2021-06-13 08:21:55,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312836053] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:21:55,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:21:55,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-13 08:21:55,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605076808] [2021-06-13 08:21:55,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:21:55,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:21:55,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:21:55,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:21:55,795 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 24 [2021-06-13 08:21:55,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-06-13 08:21:55,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:21:55,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 24 [2021-06-13 08:21:55,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:21:55,809 INFO L129 PetriNetUnfolder]: 1/15 cut-off events. [2021-06-13 08:21:55,809 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-06-13 08:21:55,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 15 events. 1/15 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 3/18 useless extension candidates. Maximal degree in co-relation 14. Up to 3 conditions per place. [2021-06-13 08:21:55,810 INFO L132 encePairwiseOnDemand]: 21/24 looper letters, 1 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2021-06-13 08:21:55,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 15 transitions, 58 flow [2021-06-13 08:21:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:21:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:21:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2021-06-13 08:21:55,817 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2021-06-13 08:21:55,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2021-06-13 08:21:55,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2021-06-13 08:21:55,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:21:55,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2021-06-13 08:21:55,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-06-13 08:21:55,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-06-13 08:21:55,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-06-13 08:21:55,826 INFO L185 Difference]: Start difference. First operand has 23 places, 19 transitions, 74 flow. Second operand 3 states and 64 transitions. [2021-06-13 08:21:55,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 15 transitions, 58 flow [2021-06-13 08:21:55,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 15 transitions, 42 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-06-13 08:21:55,829 INFO L241 Difference]: Finished difference. Result has 19 places, 15 transitions, 40 flow [2021-06-13 08:21:55,830 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=19, PETRI_TRANSITIONS=15} [2021-06-13 08:21:55,831 INFO L335 CegarLoopForPetriNet]: 23 programPoint places, -4 predicate places. [2021-06-13 08:21:55,831 INFO L482 AbstractCegarLoop]: Abstraction has has 19 places, 15 transitions, 40 flow [2021-06-13 08:21:55,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-06-13 08:21:55,831 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:21:55,831 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:21:55,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-13 08:21:55,832 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:21:55,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:21:55,832 INFO L82 PathProgramCache]: Analyzing trace with hash -708234032, now seen corresponding path program 1 times [2021-06-13 08:21:55,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:21:55,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542322061] [2021-06-13 08:21:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:21:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:21:55,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:55,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:21:55,916 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:55,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:21:55,926 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-13 08:21:55,927 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-13 08:21:55,953 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-06-13 08:21:55,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-13 08:21:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:21:55,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:21:55,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542322061] [2021-06-13 08:21:55,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542322061] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:21:55,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:21:55,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 08:21:55,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301083270] [2021-06-13 08:21:55,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 08:21:55,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:21:55,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 08:21:55,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-13 08:21:55,969 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 24 [2021-06-13 08:21:55,970 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 40 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-06-13 08:21:55,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:21:55,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 24 [2021-06-13 08:21:55,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:21:56,004 INFO L129 PetriNetUnfolder]: 6/43 cut-off events. [2021-06-13 08:21:56,004 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:21:56,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 43 events. 6/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 145 event pairs, 1 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 55. Up to 7 conditions per place. [2021-06-13 08:21:56,005 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 5 selfloop transitions, 2 changer transitions 1/19 dead transitions. [2021-06-13 08:21:56,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 64 flow [2021-06-13 08:21:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 08:21:56,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 08:21:56,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2021-06-13 08:21:56,007 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2021-06-13 08:21:56,007 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2021-06-13 08:21:56,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2021-06-13 08:21:56,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:21:56,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2021-06-13 08:21:56,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2021-06-13 08:21:56,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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) [2021-06-13 08:21:56,009 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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) [2021-06-13 08:21:56,009 INFO L185 Difference]: Start difference. First operand has 19 places, 15 transitions, 40 flow. Second operand 5 states and 104 transitions. [2021-06-13 08:21:56,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 64 flow [2021-06-13 08:21:56,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-13 08:21:56,010 INFO L241 Difference]: Finished difference. Result has 25 places, 16 transitions, 54 flow [2021-06-13 08:21:56,010 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=54, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2021-06-13 08:21:56,011 INFO L335 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2021-06-13 08:21:56,011 INFO L482 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 54 flow [2021-06-13 08:21:56,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-06-13 08:21:56,011 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:21:56,011 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:21:56,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-13 08:21:56,011 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:21:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:21:56,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1624622866, now seen corresponding path program 2 times [2021-06-13 08:21:56,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:21:56,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196729123] [2021-06-13 08:21:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:21:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:21:56,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:56,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:21:56,051 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:56,052 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:21:56,064 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-13 08:21:56,065 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-13 08:21:56,085 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-06-13 08:21:56,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-13 08:21:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:21:56,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:21:56,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196729123] [2021-06-13 08:21:56,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196729123] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:21:56,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:21:56,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 08:21:56,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423889475] [2021-06-13 08:21:56,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 08:21:56,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:21:56,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 08:21:56,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-13 08:21:56,104 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 24 [2021-06-13 08:21:56,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 54 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-06-13 08:21:56,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:21:56,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 24 [2021-06-13 08:21:56,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:21:56,151 INFO L129 PetriNetUnfolder]: 5/51 cut-off events. [2021-06-13 08:21:56,151 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-06-13 08:21:56,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 51 events. 5/51 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 214 event pairs, 1 based on Foata normal form. 1/51 useless extension candidates. Maximal degree in co-relation 82. Up to 8 conditions per place. [2021-06-13 08:21:56,153 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 5 selfloop transitions, 3 changer transitions 1/20 dead transitions. [2021-06-13 08:21:56,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 90 flow [2021-06-13 08:21:56,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 08:21:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 08:21:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2021-06-13 08:21:56,158 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2021-06-13 08:21:56,158 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2021-06-13 08:21:56,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2021-06-13 08:21:56,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:21:56,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2021-06-13 08:21:56,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2021-06-13 08:21:56,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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) [2021-06-13 08:21:56,163 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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) [2021-06-13 08:21:56,163 INFO L185 Difference]: Start difference. First operand has 25 places, 16 transitions, 54 flow. Second operand 5 states and 104 transitions. [2021-06-13 08:21:56,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 90 flow [2021-06-13 08:21:56,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 20 transitions, 83 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-06-13 08:21:56,165 INFO L241 Difference]: Finished difference. Result has 29 places, 17 transitions, 71 flow [2021-06-13 08:21:56,165 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=71, PETRI_PLACES=29, PETRI_TRANSITIONS=17} [2021-06-13 08:21:56,165 INFO L335 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2021-06-13 08:21:56,165 INFO L482 AbstractCegarLoop]: Abstraction has has 29 places, 17 transitions, 71 flow [2021-06-13 08:21:56,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-06-13 08:21:56,165 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:21:56,165 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:21:56,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-13 08:21:56,166 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:21:56,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:21:56,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1195756380, now seen corresponding path program 3 times [2021-06-13 08:21:56,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:21:56,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671636500] [2021-06-13 08:21:56,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:21:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:21:56,197 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:56,198 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:21:56,200 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:56,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:21:56,209 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-13 08:21:56,210 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-13 08:21:56,222 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-06-13 08:21:56,225 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-13 08:21:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:21:56,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:21:56,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671636500] [2021-06-13 08:21:56,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671636500] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:21:56,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:21:56,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 08:21:56,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678015836] [2021-06-13 08:21:56,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 08:21:56,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:21:56,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 08:21:56,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-13 08:21:56,235 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 24 [2021-06-13 08:21:56,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 17 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-06-13 08:21:56,236 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:21:56,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 24 [2021-06-13 08:21:56,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:21:56,260 INFO L129 PetriNetUnfolder]: 5/47 cut-off events. [2021-06-13 08:21:56,261 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-06-13 08:21:56,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 47 events. 5/47 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 194 event pairs, 0 based on Foata normal form. 1/47 useless extension candidates. Maximal degree in co-relation 89. Up to 8 conditions per place. [2021-06-13 08:21:56,261 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 5 selfloop transitions, 3 changer transitions 3/22 dead transitions. [2021-06-13 08:21:56,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 125 flow [2021-06-13 08:21:56,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 08:21:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 08:21:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2021-06-13 08:21:56,265 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2021-06-13 08:21:56,265 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2021-06-13 08:21:56,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2021-06-13 08:21:56,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:21:56,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2021-06-13 08:21:56,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2021-06-13 08:21:56,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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) [2021-06-13 08:21:56,267 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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) [2021-06-13 08:21:56,267 INFO L185 Difference]: Start difference. First operand has 29 places, 17 transitions, 71 flow. Second operand 5 states and 104 transitions. [2021-06-13 08:21:56,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 125 flow [2021-06-13 08:21:56,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 22 transitions, 115 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-06-13 08:21:56,268 INFO L241 Difference]: Finished difference. Result has 33 places, 17 transitions, 81 flow [2021-06-13 08:21:56,269 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=33, PETRI_TRANSITIONS=17} [2021-06-13 08:21:56,269 INFO L335 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2021-06-13 08:21:56,269 INFO L482 AbstractCegarLoop]: Abstraction has has 33 places, 17 transitions, 81 flow [2021-06-13 08:21:56,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-06-13 08:21:56,269 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:21:56,269 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:21:56,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-13 08:21:56,270 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:21:56,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:21:56,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1814479270, now seen corresponding path program 4 times [2021-06-13 08:21:56,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:21:56,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421238230] [2021-06-13 08:21:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:21:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:21:56,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:56,290 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:21:56,292 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:56,296 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:21:56,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:56,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-13 08:21:56,317 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-06-13 08:21:56,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-13 08:21:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:21:56,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:21:56,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421238230] [2021-06-13 08:21:56,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421238230] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:21:56,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:21:56,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 08:21:56,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882138321] [2021-06-13 08:21:56,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 08:21:56,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:21:56,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 08:21:56,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-13 08:21:56,332 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 24 [2021-06-13 08:21:56,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 17 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-06-13 08:21:56,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:21:56,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 24 [2021-06-13 08:21:56,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:21:56,364 INFO L129 PetriNetUnfolder]: 4/43 cut-off events. [2021-06-13 08:21:56,364 INFO L130 PetriNetUnfolder]: For 67/70 co-relation queries the response was YES. [2021-06-13 08:21:56,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 43 events. 4/43 cut-off events. For 67/70 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 146 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 89. Up to 8 conditions per place. [2021-06-13 08:21:56,365 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 5 selfloop transitions, 2 changer transitions 3/21 dead transitions. [2021-06-13 08:21:56,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 21 transitions, 135 flow [2021-06-13 08:21:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 08:21:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 08:21:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2021-06-13 08:21:56,366 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2021-06-13 08:21:56,366 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2021-06-13 08:21:56,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2021-06-13 08:21:56,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:21:56,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2021-06-13 08:21:56,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2021-06-13 08:21:56,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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) [2021-06-13 08:21:56,367 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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) [2021-06-13 08:21:56,367 INFO L185 Difference]: Start difference. First operand has 33 places, 17 transitions, 81 flow. Second operand 5 states and 104 transitions. [2021-06-13 08:21:56,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 21 transitions, 135 flow [2021-06-13 08:21:56,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 21 transitions, 117 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-06-13 08:21:56,369 INFO L241 Difference]: Finished difference. Result has 35 places, 17 transitions, 84 flow [2021-06-13 08:21:56,370 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=17} [2021-06-13 08:21:56,370 INFO L335 CegarLoopForPetriNet]: 23 programPoint places, 12 predicate places. [2021-06-13 08:21:56,370 INFO L482 AbstractCegarLoop]: Abstraction has has 35 places, 17 transitions, 84 flow [2021-06-13 08:21:56,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-06-13 08:21:56,370 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:21:56,370 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:21:56,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-13 08:21:56,370 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:21:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:21:56,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1980678818, now seen corresponding path program 5 times [2021-06-13 08:21:56,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:21:56,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062927770] [2021-06-13 08:21:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:21:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:21:56,386 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:56,387 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:21:56,387 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:56,388 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:21:56,394 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:56,395 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-13 08:21:56,405 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-06-13 08:21:56,406 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-13 08:21:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:21:56,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:21:56,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062927770] [2021-06-13 08:21:56,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062927770] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:21:56,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:21:56,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 08:21:56,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237776672] [2021-06-13 08:21:56,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 08:21:56,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:21:56,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 08:21:56,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-13 08:21:56,421 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 24 [2021-06-13 08:21:56,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 17 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-06-13 08:21:56,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:21:56,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 24 [2021-06-13 08:21:56,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:21:56,457 INFO L129 PetriNetUnfolder]: 2/28 cut-off events. [2021-06-13 08:21:56,457 INFO L130 PetriNetUnfolder]: For 56/62 co-relation queries the response was YES. [2021-06-13 08:21:56,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 28 events. 2/28 cut-off events. For 56/62 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 63 event pairs, 0 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 64. Up to 4 conditions per place. [2021-06-13 08:21:56,457 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 3 selfloop transitions, 1 changer transitions 3/18 dead transitions. [2021-06-13 08:21:56,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 18 transitions, 107 flow [2021-06-13 08:21:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 08:21:56,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 08:21:56,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2021-06-13 08:21:56,458 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.85 [2021-06-13 08:21:56,458 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 102 transitions. [2021-06-13 08:21:56,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 102 transitions. [2021-06-13 08:21:56,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:21:56,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 102 transitions. [2021-06-13 08:21:56,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-06-13 08:21:56,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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) [2021-06-13 08:21:56,460 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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) [2021-06-13 08:21:56,461 INFO L185 Difference]: Start difference. First operand has 35 places, 17 transitions, 84 flow. Second operand 5 states and 102 transitions. [2021-06-13 08:21:56,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 18 transitions, 107 flow [2021-06-13 08:21:56,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 18 transitions, 95 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-06-13 08:21:56,465 INFO L241 Difference]: Finished difference. Result has 36 places, 15 transitions, 64 flow [2021-06-13 08:21:56,465 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=64, PETRI_PLACES=36, PETRI_TRANSITIONS=15} [2021-06-13 08:21:56,465 INFO L335 CegarLoopForPetriNet]: 23 programPoint places, 13 predicate places. [2021-06-13 08:21:56,465 INFO L482 AbstractCegarLoop]: Abstraction has has 36 places, 15 transitions, 64 flow [2021-06-13 08:21:56,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-06-13 08:21:56,466 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:21:56,466 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:21:56,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-13 08:21:56,466 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:21:56,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:21:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash -221005378, now seen corresponding path program 6 times [2021-06-13 08:21:56,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:21:56,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635950585] [2021-06-13 08:21:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:21:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:21:56,502 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:56,502 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:21:56,503 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:21:56,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:21:56,508 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-13 08:21:56,508 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-13 08:21:56,516 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-06-13 08:21:56,516 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-13 08:21:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:21:56,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:21:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635950585] [2021-06-13 08:21:56,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635950585] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:21:56,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:21:56,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 08:21:56,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620546036] [2021-06-13 08:21:56,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-13 08:21:56,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:21:56,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-13 08:21:56,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-13 08:21:56,535 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 24 [2021-06-13 08:21:56,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 15 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-06-13 08:21:56,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:21:56,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 24 [2021-06-13 08:21:56,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:21:56,552 INFO L129 PetriNetUnfolder]: 1/16 cut-off events. [2021-06-13 08:21:56,553 INFO L130 PetriNetUnfolder]: For 25/27 co-relation queries the response was YES. [2021-06-13 08:21:56,553 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 16 events. 1/16 cut-off events. For 25/27 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 39. Up to 3 conditions per place. [2021-06-13 08:21:56,553 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2021-06-13 08:21:56,553 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 15 transitions, 76 flow [2021-06-13 08:21:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 08:21:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 08:21:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2021-06-13 08:21:56,553 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-06-13 08:21:56,554 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 100 transitions. [2021-06-13 08:21:56,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 100 transitions. [2021-06-13 08:21:56,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:21:56,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 100 transitions. [2021-06-13 08:21:56,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2021-06-13 08:21:56,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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) [2021-06-13 08:21:56,555 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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) [2021-06-13 08:21:56,555 INFO L185 Difference]: Start difference. First operand has 36 places, 15 transitions, 64 flow. Second operand 5 states and 100 transitions. [2021-06-13 08:21:56,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 15 transitions, 76 flow [2021-06-13 08:21:56,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 15 transitions, 60 flow, removed 3 selfloop flow, removed 6 redundant places. [2021-06-13 08:21:56,555 INFO L241 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2021-06-13 08:21:56,555 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=29, PETRI_TRANSITIONS=0} [2021-06-13 08:21:56,555 INFO L335 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2021-06-13 08:21:56,555 INFO L482 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2021-06-13 08:21:56,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-06-13 08:21:56,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-13 08:21:56,557 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-13 08:21:56,559 INFO L202 PluginConnector]: Adding new model example_interleaving.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.06 08:21:56 BasicIcfg [2021-06-13 08:21:56,559 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-13 08:21:56,560 INFO L168 Benchmark]: Toolchain (without parser) took 1195.69 ms. Allocated memory is still 215.0 MB. Free memory was 194.2 MB in the beginning and 106.5 MB in the end (delta: 87.8 MB). Peak memory consumption was 88.7 MB. Max. memory is 8.0 GB. [2021-06-13 08:21:56,560 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 215.0 MB. Free memory is still 195.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 08:21:56,560 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.84 ms. Allocated memory is still 215.0 MB. Free memory was 194.1 MB in the beginning and 192.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 08:21:56,561 INFO L168 Benchmark]: Boogie Preprocessor took 8.22 ms. Allocated memory is still 215.0 MB. Free memory was 192.6 MB in the beginning and 191.8 MB in the end (delta: 757.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-13 08:21:56,561 INFO L168 Benchmark]: RCFGBuilder took 159.54 ms. Allocated memory is still 215.0 MB. Free memory was 191.7 MB in the beginning and 182.9 MB in the end (delta: 8.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-06-13 08:21:56,561 INFO L168 Benchmark]: TraceAbstraction took 1006.46 ms. Allocated memory is still 215.0 MB. Free memory was 182.5 MB in the beginning and 106.5 MB in the end (delta: 76.0 MB). Peak memory consumption was 77.1 MB. Max. memory is 8.0 GB. [2021-06-13 08:21:56,562 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 0.09 ms. Allocated memory is still 215.0 MB. Free memory is still 195.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 17.84 ms. Allocated memory is still 215.0 MB. Free memory was 194.1 MB in the beginning and 192.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 8.22 ms. Allocated memory is still 215.0 MB. Free memory was 192.6 MB in the beginning and 191.8 MB in the end (delta: 757.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 159.54 ms. Allocated memory is still 215.0 MB. Free memory was 191.7 MB in the beginning and 182.9 MB in the end (delta: 8.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1006.46 ms. Allocated memory is still 215.0 MB. Free memory was 182.5 MB in the beginning and 106.5 MB in the end (delta: 76.0 MB). Peak memory consumption was 77.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 31 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 923.7ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 282.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 33 SDtfs, 29 SDslu, 15 SDs, 0 SdLazy, 54 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 245.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=5, InterpolantAutomatonStates: 33, 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: 8.4ms SsaConstructionTime, 24.8ms SatisfiabilityAnalysisTime, 450.0ms InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 894 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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...