/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.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 14:37:38,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 14:37:38,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 14:37:38,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-10 14:37:38,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 14:37:38,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 14:37:38,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 14:37:38,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 14:37:38,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 14:37:38,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 14:37:38,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 14:37:38,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 14:37:38,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 14:37:38,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 14:37:38,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 14:37:38,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 14:37:38,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 14:37:38,533 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 14:37:38,559 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 14:37:38,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 14:37:38,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 14:37:38,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 14:37:38,561 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 14:37:38,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 14:37:38,562 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 14:37:38,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 14:37:38,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 14:37:38,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 14:37:38,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 14:37:38,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 14:37:38,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 14:37:38,563 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 14:37:38,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 14:37:38,563 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 14:37:38,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 14:37:38,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 14:37:38,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 14:37:38,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 14:37:38,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 14:37:38,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 14:37:38,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 14:37:38,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 14:37:38,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 14:37:38,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 14:37:38,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 14:37:38,565 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 14:37:38,565 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 14:37:38,565 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 14:37:38,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 14:37:38,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 14:37:38,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 14:37:38,835 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 14:37:38,836 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 14:37:38,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_interleaving.bpl [2021-06-10 14:37:38,837 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_interleaving.bpl' [2021-06-10 14:37:38,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 14:37:38,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 14:37:38,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 14:37:38,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 14:37:38,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 14:37:38,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:38" (1/1) ... [2021-06-10 14:37:38,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:38" (1/1) ... [2021-06-10 14:37:38,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 14:37:38,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 14:37:38,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 14:37:38,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 14:37:38,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:38" (1/1) ... [2021-06-10 14:37:38,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:38" (1/1) ... [2021-06-10 14:37:38,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:38" (1/1) ... [2021-06-10 14:37:38,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:38" (1/1) ... [2021-06-10 14:37:38,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:38" (1/1) ... [2021-06-10 14:37:38,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:38" (1/1) ... [2021-06-10 14:37:38,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:38" (1/1) ... [2021-06-10 14:37:38,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 14:37:38,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 14:37:38,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 14:37:38,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 14:37:38,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:38" (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 14:37:38,979 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_y given in one single declaration [2021-06-10 14:37:38,979 INFO L130 BoogieDeclarations]: Found specification of procedure set_y [2021-06-10 14:37:38,979 INFO L138 BoogieDeclarations]: Found implementation of procedure set_y [2021-06-10 14:37:38,979 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_z given in one single declaration [2021-06-10 14:37:38,979 INFO L130 BoogieDeclarations]: Found specification of procedure set_z [2021-06-10 14:37:38,979 INFO L138 BoogieDeclarations]: Found implementation of procedure set_z [2021-06-10 14:37:38,979 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 14:37:38,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 14:37:38,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 14:37:38,980 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_x given in one single declaration [2021-06-10 14:37:38,980 INFO L130 BoogieDeclarations]: Found specification of procedure set_x [2021-06-10 14:37:38,980 INFO L138 BoogieDeclarations]: Found implementation of procedure set_x [2021-06-10 14:37:38,981 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 14:37:39,074 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 14:37:39,074 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 14:37:39,076 INFO L202 PluginConnector]: Adding new model example_interleaving.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:37:39 BoogieIcfgContainer [2021-06-10 14:37:39,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 14:37:39,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 14:37:39,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 14:37:39,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 14:37:39,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:38" (1/2) ... [2021-06-10 14:37:39,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b4207e and model type example_interleaving.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 02:37:39, skipping insertion in model container [2021-06-10 14:37:39,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:37:39" (2/2) ... [2021-06-10 14:37:39,082 INFO L111 eAbstractionObserver]: Analyzing ICFG example_interleaving.bpl [2021-06-10 14:37:39,088 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 14:37:39,091 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 14:37:39,092 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 14:37:39,150 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-06-10 14:37:39,162 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-10 14:37:39,206 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:37:39,207 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:37:39,207 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:37:39,207 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:37:39,207 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:37:39,207 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:37:39,207 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:37:39,207 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:37:39,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 90 flow [2021-06-10 14:37:39,227 INFO L129 PetriNetUnfolder]: 5/24 cut-off events. [2021-06-10 14:37:39,227 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-06-10 14:37:39,229 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. [2021-06-10 14:37:39,229 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 90 flow [2021-06-10 14:37:39,232 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 19 transitions, 74 flow [2021-06-10 14:37:39,237 INFO L129 PetriNetUnfolder]: 5/21 cut-off events. [2021-06-10 14:37:39,242 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-06-10 14:37:39,243 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:39,243 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:39,243 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:39,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:39,247 INFO L82 PathProgramCache]: Analyzing trace with hash 621310348, now seen corresponding path program 1 times [2021-06-10 14:37:39,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:39,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066685026] [2021-06-10 14:37:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:39,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:37:39,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:37:39,333 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,333 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:37:39,334 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 14:37:39,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066685026] [2021-06-10 14:37:39,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:39,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 14:37:39,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372137800] [2021-06-10 14:37:39,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:37:39,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:39,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:37:39,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:37:39,367 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 24 [2021-06-10 14:37:39,369 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) [2021-06-10 14:37:39,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:39,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 24 [2021-06-10 14:37:39,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:39,380 INFO L129 PetriNetUnfolder]: 1/15 cut-off events. [2021-06-10 14:37:39,380 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-06-10 14:37:39,380 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. [2021-06-10 14:37:39,381 INFO L132 encePairwiseOnDemand]: 21/24 looper letters, 1 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2021-06-10 14:37:39,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 15 transitions, 58 flow [2021-06-10 14:37:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:37:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:37:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2021-06-10 14:37:39,404 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2021-06-10 14:37:39,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2021-06-10 14:37:39,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2021-06-10 14:37:39,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:39,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2021-06-10 14:37:39,408 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) [2021-06-10 14:37:39,410 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) [2021-06-10 14:37:39,410 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) [2021-06-10 14:37:39,411 INFO L185 Difference]: Start difference. First operand has 23 places, 19 transitions, 74 flow. Second operand 3 states and 64 transitions. [2021-06-10 14:37:39,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 15 transitions, 58 flow [2021-06-10 14:37:39,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 15 transitions, 42 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-06-10 14:37:39,414 INFO L241 Difference]: Finished difference. Result has 19 places, 15 transitions, 40 flow [2021-06-10 14:37:39,415 INFO L326 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} [2021-06-10 14:37:39,416 INFO L343 CegarLoopForPetriNet]: 23 programPoint places, -4 predicate places. [2021-06-10 14:37:39,416 INFO L480 AbstractCegarLoop]: Abstraction has has 19 places, 15 transitions, 40 flow [2021-06-10 14:37:39,430 INFO L481 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) [2021-06-10 14:37:39,430 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:39,430 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:39,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 14:37:39,431 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:39,431 INFO L82 PathProgramCache]: Analyzing trace with hash -708234032, now seen corresponding path program 1 times [2021-06-10 14:37:39,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:39,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355117459] [2021-06-10 14:37:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:39,489 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,490 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:37:39,495 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,497 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:37:39,518 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-10 14:37:39,519 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 14:37:39,536 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-06-10 14:37:39,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 14:37:39,552 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 14:37:39,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355117459] [2021-06-10 14:37:39,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:39,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 14:37:39,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458753170] [2021-06-10 14:37:39,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 14:37:39,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:39,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 14:37:39,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-10 14:37:39,555 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 24 [2021-06-10 14:37:39,555 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) [2021-06-10 14:37:39,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:39,555 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 24 [2021-06-10 14:37:39,555 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:39,595 INFO L129 PetriNetUnfolder]: 6/43 cut-off events. [2021-06-10 14:37:39,595 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:39,595 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 144 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. [2021-06-10 14:37:39,596 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 5 selfloop transitions, 2 changer transitions 1/19 dead transitions. [2021-06-10 14:37:39,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 64 flow [2021-06-10 14:37:39,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 14:37:39,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 14:37:39,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2021-06-10 14:37:39,597 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2021-06-10 14:37:39,597 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2021-06-10 14:37:39,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2021-06-10 14:37:39,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:39,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2021-06-10 14:37:39,599 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) [2021-06-10 14:37:39,599 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) [2021-06-10 14:37:39,600 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) [2021-06-10 14:37:39,600 INFO L185 Difference]: Start difference. First operand has 19 places, 15 transitions, 40 flow. Second operand 5 states and 104 transitions. [2021-06-10 14:37:39,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 64 flow [2021-06-10 14:37:39,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-10 14:37:39,601 INFO L241 Difference]: Finished difference. Result has 25 places, 16 transitions, 54 flow [2021-06-10 14:37:39,601 INFO L326 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} [2021-06-10 14:37:39,601 INFO L343 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2021-06-10 14:37:39,602 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 54 flow [2021-06-10 14:37:39,602 INFO L481 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) [2021-06-10 14:37:39,602 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:39,602 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:39,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 14:37:39,602 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:39,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:39,603 INFO L82 PathProgramCache]: Analyzing trace with hash 915521612, now seen corresponding path program 2 times [2021-06-10 14:37:39,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:39,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004503197] [2021-06-10 14:37:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:39,630 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:37:39,631 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,632 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:37:39,639 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-10 14:37:39,640 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 14:37:39,650 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-06-10 14:37:39,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 14:37:39,660 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 14:37:39,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004503197] [2021-06-10 14:37:39,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:39,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 14:37:39,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114322635] [2021-06-10 14:37:39,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 14:37:39,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:39,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 14:37:39,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-10 14:37:39,662 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 24 [2021-06-10 14:37:39,663 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) [2021-06-10 14:37:39,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:39,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 24 [2021-06-10 14:37:39,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:39,690 INFO L129 PetriNetUnfolder]: 5/51 cut-off events. [2021-06-10 14:37:39,690 INFO L130 PetriNetUnfolder]: For 25/28 co-relation queries the response was YES. [2021-06-10 14:37:39,691 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 51 events. 5/51 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 223 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. [2021-06-10 14:37:39,691 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 5 selfloop transitions, 3 changer transitions 1/20 dead transitions. [2021-06-10 14:37:39,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 90 flow [2021-06-10 14:37:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 14:37:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 14:37:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2021-06-10 14:37:39,692 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2021-06-10 14:37:39,693 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2021-06-10 14:37:39,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2021-06-10 14:37:39,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:39,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2021-06-10 14:37:39,694 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) [2021-06-10 14:37:39,694 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) [2021-06-10 14:37:39,694 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) [2021-06-10 14:37:39,695 INFO L185 Difference]: Start difference. First operand has 25 places, 16 transitions, 54 flow. Second operand 5 states and 104 transitions. [2021-06-10 14:37:39,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 90 flow [2021-06-10 14:37:39,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 20 transitions, 83 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-06-10 14:37:39,696 INFO L241 Difference]: Finished difference. Result has 29 places, 17 transitions, 71 flow [2021-06-10 14:37:39,696 INFO L326 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} [2021-06-10 14:37:39,696 INFO L343 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2021-06-10 14:37:39,697 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 17 transitions, 71 flow [2021-06-10 14:37:39,697 INFO L481 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) [2021-06-10 14:37:39,697 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:39,697 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:39,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 14:37:39,697 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:39,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1026561884, now seen corresponding path program 3 times [2021-06-10 14:37:39,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:39,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127885921] [2021-06-10 14:37:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:39,714 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:37:39,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:37:39,721 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-10 14:37:39,722 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 14:37:39,746 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-06-10 14:37:39,747 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 14:37:39,756 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 14:37:39,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127885921] [2021-06-10 14:37:39,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:39,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 14:37:39,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122037282] [2021-06-10 14:37:39,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 14:37:39,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:39,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 14:37:39,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-10 14:37:39,761 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 24 [2021-06-10 14:37:39,761 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) [2021-06-10 14:37:39,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:39,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 24 [2021-06-10 14:37:39,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:39,791 INFO L129 PetriNetUnfolder]: 5/47 cut-off events. [2021-06-10 14:37:39,791 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-06-10 14:37:39,791 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 192 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. [2021-06-10 14:37:39,791 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 5 selfloop transitions, 3 changer transitions 3/22 dead transitions. [2021-06-10 14:37:39,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 125 flow [2021-06-10 14:37:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 14:37:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 14:37:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2021-06-10 14:37:39,793 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2021-06-10 14:37:39,793 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2021-06-10 14:37:39,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2021-06-10 14:37:39,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:39,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2021-06-10 14:37:39,794 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) [2021-06-10 14:37:39,794 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) [2021-06-10 14:37:39,794 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) [2021-06-10 14:37:39,794 INFO L185 Difference]: Start difference. First operand has 29 places, 17 transitions, 71 flow. Second operand 5 states and 104 transitions. [2021-06-10 14:37:39,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 125 flow [2021-06-10 14:37:39,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 22 transitions, 115 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-06-10 14:37:39,796 INFO L241 Difference]: Finished difference. Result has 33 places, 17 transitions, 81 flow [2021-06-10 14:37:39,796 INFO L326 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} [2021-06-10 14:37:39,796 INFO L343 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2021-06-10 14:37:39,796 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 17 transitions, 81 flow [2021-06-10 14:37:39,796 INFO L481 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) [2021-06-10 14:37:39,796 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:39,797 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:39,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-10 14:37:39,797 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:39,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:39,797 INFO L82 PathProgramCache]: Analyzing trace with hash -826568586, now seen corresponding path program 4 times [2021-06-10 14:37:39,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:39,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574131488] [2021-06-10 14:37:39,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:39,811 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,812 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:37:39,813 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,813 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:37:39,817 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,818 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 14:37:39,826 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-06-10 14:37:39,826 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 14:37:39,834 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 14:37:39,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574131488] [2021-06-10 14:37:39,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:39,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 14:37:39,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907063563] [2021-06-10 14:37:39,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 14:37:39,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:39,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 14:37:39,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-10 14:37:39,836 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 24 [2021-06-10 14:37:39,836 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) [2021-06-10 14:37:39,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:39,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 24 [2021-06-10 14:37:39,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:39,864 INFO L129 PetriNetUnfolder]: 4/43 cut-off events. [2021-06-10 14:37:39,864 INFO L130 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2021-06-10 14:37:39,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 43 events. 4/43 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 151 event pairs, 0 based on Foata normal form. 1/43 useless extension candidates. Maximal degree in co-relation 89. Up to 8 conditions per place. [2021-06-10 14:37:39,865 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 5 selfloop transitions, 2 changer transitions 3/21 dead transitions. [2021-06-10 14:37:39,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 21 transitions, 135 flow [2021-06-10 14:37:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 14:37:39,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 14:37:39,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2021-06-10 14:37:39,866 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2021-06-10 14:37:39,866 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2021-06-10 14:37:39,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2021-06-10 14:37:39,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:39,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2021-06-10 14:37:39,867 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) [2021-06-10 14:37:39,867 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) [2021-06-10 14:37:39,868 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) [2021-06-10 14:37:39,868 INFO L185 Difference]: Start difference. First operand has 33 places, 17 transitions, 81 flow. Second operand 5 states and 104 transitions. [2021-06-10 14:37:39,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 21 transitions, 135 flow [2021-06-10 14:37:39,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 21 transitions, 117 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-06-10 14:37:39,869 INFO L241 Difference]: Finished difference. Result has 35 places, 17 transitions, 84 flow [2021-06-10 14:37:39,869 INFO L326 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} [2021-06-10 14:37:39,870 INFO L343 CegarLoopForPetriNet]: 23 programPoint places, 12 predicate places. [2021-06-10 14:37:39,870 INFO L480 AbstractCegarLoop]: Abstraction has has 35 places, 17 transitions, 84 flow [2021-06-10 14:37:39,870 INFO L481 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) [2021-06-10 14:37:39,870 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:39,870 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:39,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-10 14:37:39,870 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:39,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1980678818, now seen corresponding path program 5 times [2021-06-10 14:37:39,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:39,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743596808] [2021-06-10 14:37:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:39,885 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,886 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:37:39,889 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:37:39,896 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 14:37:39,919 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-06-10 14:37:39,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 14:37:39,928 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 14:37:39,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743596808] [2021-06-10 14:37:39,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:39,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 14:37:39,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221191249] [2021-06-10 14:37:39,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 14:37:39,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:39,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 14:37:39,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-10 14:37:39,930 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 24 [2021-06-10 14:37:39,930 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) [2021-06-10 14:37:39,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:39,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 24 [2021-06-10 14:37:39,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:39,957 INFO L129 PetriNetUnfolder]: 2/28 cut-off events. [2021-06-10 14:37:39,957 INFO L130 PetriNetUnfolder]: For 55/60 co-relation queries the response was YES. [2021-06-10 14:37:39,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 28 events. 2/28 cut-off events. For 55/60 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 64 event pairs, 0 based on Foata normal form. 2/30 useless extension candidates. Maximal degree in co-relation 64. Up to 4 conditions per place. [2021-06-10 14:37:39,957 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 3 selfloop transitions, 1 changer transitions 3/18 dead transitions. [2021-06-10 14:37:39,958 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 18 transitions, 107 flow [2021-06-10 14:37:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 14:37:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 14:37:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2021-06-10 14:37:39,958 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.85 [2021-06-10 14:37:39,958 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 102 transitions. [2021-06-10 14:37:39,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 102 transitions. [2021-06-10 14:37:39,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:39,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 102 transitions. [2021-06-10 14:37:39,959 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) [2021-06-10 14:37:39,959 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) [2021-06-10 14:37:39,960 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) [2021-06-10 14:37:39,960 INFO L185 Difference]: Start difference. First operand has 35 places, 17 transitions, 84 flow. Second operand 5 states and 102 transitions. [2021-06-10 14:37:39,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 18 transitions, 107 flow [2021-06-10 14:37:39,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 18 transitions, 95 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-06-10 14:37:39,961 INFO L241 Difference]: Finished difference. Result has 36 places, 15 transitions, 64 flow [2021-06-10 14:37:39,961 INFO L326 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} [2021-06-10 14:37:39,961 INFO L343 CegarLoopForPetriNet]: 23 programPoint places, 13 predicate places. [2021-06-10 14:37:39,961 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 15 transitions, 64 flow [2021-06-10 14:37:39,961 INFO L481 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) [2021-06-10 14:37:39,962 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:39,962 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:39,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-10 14:37:39,962 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:39,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:39,962 INFO L82 PathProgramCache]: Analyzing trace with hash -221005378, now seen corresponding path program 6 times [2021-06-10 14:37:39,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:39,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161604032] [2021-06-10 14:37:39,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:39,974 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:37:39,975 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:39,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:37:39,980 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-10 14:37:39,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 14:37:39,988 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-06-10 14:37:39,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 14:37:39,996 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 14:37:39,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161604032] [2021-06-10 14:37:39,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:39,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 14:37:39,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730228089] [2021-06-10 14:37:39,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 14:37:39,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:39,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 14:37:39,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-10 14:37:39,997 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 24 [2021-06-10 14:37:39,998 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) [2021-06-10 14:37:39,998 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:39,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 24 [2021-06-10 14:37:39,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:40,013 INFO L129 PetriNetUnfolder]: 1/16 cut-off events. [2021-06-10 14:37:40,017 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-06-10 14:37:40,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 16 events. 1/16 cut-off events. For 22/22 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. [2021-06-10 14:37:40,018 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2021-06-10 14:37:40,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 15 transitions, 76 flow [2021-06-10 14:37:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 14:37:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 14:37:40,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2021-06-10 14:37:40,019 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-06-10 14:37:40,019 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 100 transitions. [2021-06-10 14:37:40,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 100 transitions. [2021-06-10 14:37:40,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:40,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 100 transitions. [2021-06-10 14:37:40,019 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) [2021-06-10 14:37:40,020 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) [2021-06-10 14:37:40,020 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) [2021-06-10 14:37:40,020 INFO L185 Difference]: Start difference. First operand has 36 places, 15 transitions, 64 flow. Second operand 5 states and 100 transitions. [2021-06-10 14:37:40,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 15 transitions, 76 flow [2021-06-10 14:37:40,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 15 transitions, 60 flow, removed 3 selfloop flow, removed 6 redundant places. [2021-06-10 14:37:40,023 INFO L241 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2021-06-10 14:37:40,023 INFO L326 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} [2021-06-10 14:37:40,024 INFO L343 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2021-06-10 14:37:40,024 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2021-06-10 14:37:40,024 INFO L481 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) [2021-06-10 14:37:40,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-10 14:37:40,028 INFO L202 PluginConnector]: Adding new model example_interleaving.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 02:37:40 BasicIcfg [2021-06-10 14:37:40,028 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 14:37:40,029 INFO L168 Benchmark]: Toolchain (without parser) took 1132.82 ms. Allocated memory is still 348.1 MB. Free memory was 328.1 MB in the beginning and 227.9 MB in the end (delta: 100.2 MB). Peak memory consumption was 103.2 MB. Max. memory is 16.0 GB. [2021-06-10 14:37:40,029 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 348.1 MB. Free memory was 329.1 MB in the beginning and 329.0 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:37:40,030 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.00 ms. Allocated memory is still 348.1 MB. Free memory was 328.0 MB in the beginning and 326.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 14:37:40,031 INFO L168 Benchmark]: Boogie Preprocessor took 10.54 ms. Allocated memory is still 348.1 MB. Free memory was 326.5 MB in the beginning and 325.7 MB in the end (delta: 734.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 14:37:40,033 INFO L168 Benchmark]: RCFGBuilder took 149.61 ms. Allocated memory is still 348.1 MB. Free memory was 325.6 MB in the beginning and 316.8 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-10 14:37:40,034 INFO L168 Benchmark]: TraceAbstraction took 950.19 ms. Allocated memory is still 348.1 MB. Free memory was 316.4 MB in the beginning and 227.9 MB in the end (delta: 88.4 MB). Peak memory consumption was 90.6 MB. Max. memory is 16.0 GB. [2021-06-10 14:37:40,037 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 348.1 MB. Free memory was 329.1 MB in the beginning and 329.0 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.00 ms. Allocated memory is still 348.1 MB. Free memory was 328.0 MB in the beginning and 326.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.54 ms. Allocated memory is still 348.1 MB. Free memory was 326.5 MB in the beginning and 325.7 MB in the end (delta: 734.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 149.61 ms. Allocated memory is still 348.1 MB. Free memory was 325.6 MB in the beginning and 316.8 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 950.19 ms. Allocated memory is still 348.1 MB. Free memory was 316.4 MB in the beginning and 227.9 MB in the end (delta: 88.4 MB). Peak memory consumption was 90.6 MB. Max. memory is 16.0 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 CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 10.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 837.5ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 281.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 33 SDtfs, 29 SDslu, 15 SDs, 0 SdLazy, 54 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 233.0ms 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: 5.4ms SsaConstructionTime, 19.4ms SatisfiabilityAnalysisTime, 376.0ms InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 882 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...