/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-OGIterative-CovSimpl.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/LBE_bigexample_safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-13 07:35:03,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-13 07:35:03,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-13 07:35:03,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-13 07:35:03,886 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-OGIterative-CovSimpl.epf [2021-08-13 07:35:03,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-13 07:35:03,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-13 07:35:03,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-13 07:35:03,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-13 07:35:03,906 INFO L138 SettingsManager]: * Use SBE=true [2021-08-13 07:35:03,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-13 07:35:03,907 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-13 07:35:03,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-13 07:35:03,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-13 07:35:03,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-13 07:35:03,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-13 07:35:03,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-13 07:35:03,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-13 07:35:03,908 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-13 07:35:03,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-13 07:35:03,908 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-13 07:35:03,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-13 07:35:03,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-13 07:35:03,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-13 07:35:03,909 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-13 07:35:03,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-13 07:35:03,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 07:35:03,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-13 07:35:03,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-13 07:35:03,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-13 07:35:03,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-13 07:35:03,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-13 07:35:03,910 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-13 07:35:03,910 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-13 07:35:03,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-13 07:35:03,910 INFO L138 SettingsManager]: * Compute cosets for OwickiGries annotation iteratively=true [2021-08-13 07:35:03,910 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-13 07:35:03,911 INFO L138 SettingsManager]: * Simplify away covered predicates in OwickiGries annotation=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-13 07:35:04,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-13 07:35:04,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-13 07:35:04,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-13 07:35:04,259 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-13 07:35:04,261 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-13 07:35:04,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/LBE_bigexample_safe.bpl [2021-08-13 07:35:04,277 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/LBE_bigexample_safe.bpl' [2021-08-13 07:35:04,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-13 07:35:04,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-13 07:35:04,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-13 07:35:04,299 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-13 07:35:04,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-13 07:35:04,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 07:35:04" (1/1) ... [2021-08-13 07:35:04,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 07:35:04" (1/1) ... [2021-08-13 07:35:04,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-13 07:35:04,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-13 07:35:04,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-13 07:35:04,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-13 07:35:04,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 07:35:04" (1/1) ... [2021-08-13 07:35:04,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 07:35:04" (1/1) ... [2021-08-13 07:35:04,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 07:35:04" (1/1) ... [2021-08-13 07:35:04,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 07:35:04" (1/1) ... [2021-08-13 07:35:04,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 07:35:04" (1/1) ... [2021-08-13 07:35:04,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 07:35:04" (1/1) ... [2021-08-13 07:35:04,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 07:35:04" (1/1) ... [2021-08-13 07:35:04,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-13 07:35:04,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-13 07:35:04,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-13 07:35:04,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-13 07:35:04,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 07:35:04" (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 [2021-08-13 07:35:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-13 07:35:04,401 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-13 07:35:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-13 07:35:04,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-13 07:35:04,402 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-13 07:35:04,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-13 07:35:04,570 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-13 07:35:04,571 INFO L202 PluginConnector]: Adding new model LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 07:35:04 BoogieIcfgContainer [2021-08-13 07:35:04,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-13 07:35:04,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-13 07:35:04,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-13 07:35:04,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-13 07:35:04,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 07:35:04" (1/2) ... [2021-08-13 07:35:04,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f11a868 and model type LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.08 07:35:04, skipping insertion in model container [2021-08-13 07:35:04,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 07:35:04" (2/2) ... [2021-08-13 07:35:04,577 INFO L111 eAbstractionObserver]: Analyzing ICFG LBE_bigexample_safe.bpl [2021-08-13 07:35:04,582 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-13 07:35:04,582 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2021-08-13 07:35:04,583 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-13 07:35:04,641 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2021-08-13 07:35:04,660 INFO L255 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2021-08-13 07:35:04,677 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 07:35:04,677 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 07:35:04,677 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 07:35:04,677 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 07:35:04,678 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 07:35:04,678 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 07:35:04,678 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 07:35:04,678 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 07:35:04,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 240 flow [2021-08-13 07:35:04,743 INFO L129 PetriNetUnfolder]: 17/98 cut-off events. [2021-08-13 07:35:04,743 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-08-13 07:35:04,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 98 events. 17/98 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 198 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 93. Up to 12 conditions per place. [2021-08-13 07:35:04,762 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 240 flow [2021-08-13 07:35:04,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 77 transitions, 202 flow [2021-08-13 07:35:04,773 INFO L129 PetriNetUnfolder]: 0/4 cut-off events. [2021-08-13 07:35:04,773 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 07:35:04,773 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 07:35:04,774 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2021-08-13 07:35:04,774 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr1ASSERT_VIOLATIONASSERT, fooErr1ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr1ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr18ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr17ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr16ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr19ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr14ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr15ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONASSERT, ULTIMATE.startErr12ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr13ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONASSERT, ULTIMATE.startErr11ASSERT_VIOLATIONASSERT, fooErr1ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr1ASSERT_VIOLATIONASSERT]=== [2021-08-13 07:35:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 07:35:04,796 INFO L82 PathProgramCache]: Analyzing trace with hash 111808, now seen corresponding path program 1 times [2021-08-13 07:35:04,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 07:35:04,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799849951] [2021-08-13 07:35:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 07:35:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 07:35:04,889 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 07:35:04,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 07:35:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 07:35:04,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 07:35:04,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799849951] [2021-08-13 07:35:04,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799849951] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 07:35:04,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 07:35:04,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 07:35:04,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297350985] [2021-08-13 07:35:04,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 07:35:04,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 07:35:04,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 07:35:04,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 07:35:04,968 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 86 [2021-08-13 07:35:04,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-08-13 07:35:04,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 07:35:04,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 86 [2021-08-13 07:35:04,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 07:35:05,750 INFO L129 PetriNetUnfolder]: 4534/6538 cut-off events. [2021-08-13 07:35:05,751 INFO L130 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2021-08-13 07:35:05,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12961 conditions, 6538 events. 4534/6538 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 28053 event pairs, 4456 based on Foata normal form. 0/6522 useless extension candidates. Maximal degree in co-relation 12734. Up to 6157 conditions per place. [2021-08-13 07:35:05,774 INFO L132 encePairwiseOnDemand]: 57/86 looper letters, 0 selfloop transitions, 0 changer transitions 49/49 dead transitions. [2021-08-13 07:35:05,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 204 flow [2021-08-13 07:35:05,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 07:35:05,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 07:35:05,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2021-08-13 07:35:05,787 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2021-08-13 07:35:05,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 144 transitions. [2021-08-13 07:35:05,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 144 transitions. [2021-08-13 07:35:05,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 07:35:05,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 144 transitions. [2021-08-13 07:35:05,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.0) internal successors, (144), 3 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) [2021-08-13 07:35:05,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2021-08-13 07:35:05,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2021-08-13 07:35:05,805 INFO L348 CegarLoopForPetriNet]: 81 programPoint places, -26 predicate places. [2021-08-13 07:35:05,805 INFO L482 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 204 flow [2021-08-13 07:35:05,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-08-13 07:35:05,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown