/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/showcase/Bakery.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 14:38:01,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 14:38:01,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 14:38:01,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-10 14:38:01,486 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 14:38:01,499 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 14:38:01,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 14:38:01,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 14:38:01,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 14:38:01,500 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 14:38:01,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 14:38:01,500 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 14:38:01,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 14:38:01,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 14:38:01,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 14:38:01,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 14:38:01,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 14:38:01,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 14:38:01,501 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 14:38:01,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 14:38:01,501 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 14:38:01,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 14:38:01,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 14:38:01,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 14:38:01,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 14:38:01,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 14:38:01,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 14:38:01,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 14:38:01,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 14:38:01,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 14:38:01,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 14:38:01,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 14:38:01,503 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 14:38:01,503 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 14:38:01,503 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 14:38:01,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 14:38:01,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 14:38:01,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 14:38:01,753 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 14:38:01,754 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 14:38:01,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Bakery.bpl [2021-06-10 14:38:01,764 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Bakery.bpl' [2021-06-10 14:38:01,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 14:38:01,783 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 14:38:01,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 14:38:01,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 14:38:01,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 14:38:01,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:38:01" (1/1) ... [2021-06-10 14:38:01,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:38:01" (1/1) ... [2021-06-10 14:38:01,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 14:38:01,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 14:38:01,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 14:38:01,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 14:38:01,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:38:01" (1/1) ... [2021-06-10 14:38:01,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:38:01" (1/1) ... [2021-06-10 14:38:01,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:38:01" (1/1) ... [2021-06-10 14:38:01,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:38:01" (1/1) ... [2021-06-10 14:38:01,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:38:01" (1/1) ... [2021-06-10 14:38:01,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:38:01" (1/1) ... [2021-06-10 14:38:01,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:38:01" (1/1) ... [2021-06-10 14:38:01,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 14:38:01,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 14:38:01,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 14:38:01,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 14:38:01,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:38:01" (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 14:38:01,877 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2021-06-10 14:38:01,878 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2021-06-10 14:38:01,879 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2021-06-10 14:38:01,880 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-06-10 14:38:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-06-10 14:38:01,880 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-06-10 14:38:01,880 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 14:38:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 14:38:01,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 14:38:01,881 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 14:38:01,989 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 14:38:01,989 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-10 14:38:01,990 INFO L202 PluginConnector]: Adding new model Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:38:01 BoogieIcfgContainer [2021-06-10 14:38:01,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 14:38:01,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 14:38:01,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 14:38:01,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 14:38:01,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:38:01" (1/2) ... [2021-06-10 14:38:01,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7024ac5f and model type Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 02:38:01, skipping insertion in model container [2021-06-10 14:38:01,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:38:01" (2/2) ... [2021-06-10 14:38:01,995 INFO L111 eAbstractionObserver]: Analyzing ICFG Bakery.bpl [2021-06-10 14:38:01,999 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 14:38:02,001 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-06-10 14:38:02,002 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 14:38:02,019 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:38:02,031 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-10 14:38:02,045 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:38:02,045 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:38:02,045 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:38:02,045 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:38:02,046 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:38:02,046 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:38:02,046 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:38:02,046 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:38:02,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 62 flow [2021-06-10 14:38:02,066 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-06-10 14:38:02,066 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:02,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 24 events. 2/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 45 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2021-06-10 14:38:02,068 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 62 flow [2021-06-10 14:38:02,071 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 54 flow [2021-06-10 14:38:02,075 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-06-10 14:38:02,075 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:02,076 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:02,076 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:02,076 INFO L428 AbstractCegarLoop]: === Iteration 1 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 14:38:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:02,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1948731573, now seen corresponding path program 1 times [2021-06-10 14:38:02,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:02,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52621843] [2021-06-10 14:38:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:02,165 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:38:02,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,194 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,195 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 14:38:02,211 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,211 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:38:02,217 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 14:38:02,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52621843] [2021-06-10 14:38:02,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:02,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 14:38:02,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171318850] [2021-06-10 14:38:02,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 14:38:02,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:02,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 14:38:02,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-10 14:38:02,234 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 26 [2021-06-10 14:38:02,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 14:38:02,236 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:02,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 26 [2021-06-10 14:38:02,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:02,279 INFO L129 PetriNetUnfolder]: 17/73 cut-off events. [2021-06-10 14:38:02,280 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:02,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 73 events. 17/73 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 237 event pairs, 4 based on Foata normal form. 3/66 useless extension candidates. Maximal degree in co-relation 106. Up to 25 conditions per place. [2021-06-10 14:38:02,282 INFO L132 encePairwiseOnDemand]: 19/26 looper letters, 11 selfloop transitions, 6 changer transitions 0/29 dead transitions. [2021-06-10 14:38:02,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 98 flow [2021-06-10 14:38:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-10 14:38:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-10 14:38:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2021-06-10 14:38:02,289 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8365384615384616 [2021-06-10 14:38:02,290 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 87 transitions. [2021-06-10 14:38:02,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 87 transitions. [2021-06-10 14:38:02,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:02,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 87 transitions. [2021-06-10 14:38:02,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 14:38:02,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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 14:38:02,296 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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 14:38:02,297 INFO L185 Difference]: Start difference. First operand has 29 places, 24 transitions, 54 flow. Second operand 4 states and 87 transitions. [2021-06-10 14:38:02,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 98 flow [2021-06-10 14:38:02,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 96 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 14:38:02,301 INFO L241 Difference]: Finished difference. Result has 28 places, 25 transitions, 82 flow [2021-06-10 14:38:02,302 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2021-06-10 14:38:02,303 INFO L343 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2021-06-10 14:38:02,303 INFO L480 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 82 flow [2021-06-10 14:38:02,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 14:38:02,303 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:02,303 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:02,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 14:38:02,304 INFO L428 AbstractCegarLoop]: === Iteration 2 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 14:38:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:02,304 INFO L82 PathProgramCache]: Analyzing trace with hash 281769241, now seen corresponding path program 1 times [2021-06-10 14:38:02,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:02,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390042095] [2021-06-10 14:38:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:02,320 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,320 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,323 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 14:38:02,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390042095] [2021-06-10 14:38:02,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:02,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:38:02,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114895718] [2021-06-10 14:38:02,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:38:02,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:02,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:38:02,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:38:02,326 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 26 [2021-06-10 14:38:02,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 14:38:02,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:02,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 26 [2021-06-10 14:38:02,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:02,365 INFO L129 PetriNetUnfolder]: 37/124 cut-off events. [2021-06-10 14:38:02,365 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-06-10 14:38:02,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 124 events. 37/124 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 483 event pairs, 8 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 239. Up to 49 conditions per place. [2021-06-10 14:38:02,367 INFO L132 encePairwiseOnDemand]: 17/26 looper letters, 8 selfloop transitions, 7 changer transitions 0/31 dead transitions. [2021-06-10 14:38:02,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 124 flow [2021-06-10 14:38:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:38:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:38:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2021-06-10 14:38:02,369 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2021-06-10 14:38:02,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2021-06-10 14:38:02,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2021-06-10 14:38:02,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:02,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2021-06-10 14:38:02,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 14:38:02,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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 14:38:02,370 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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 14:38:02,370 INFO L185 Difference]: Start difference. First operand has 28 places, 25 transitions, 82 flow. Second operand 3 states and 62 transitions. [2021-06-10 14:38:02,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 124 flow [2021-06-10 14:38:02,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-06-10 14:38:02,372 INFO L241 Difference]: Finished difference. Result has 32 places, 31 transitions, 138 flow [2021-06-10 14:38:02,372 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2021-06-10 14:38:02,373 INFO L343 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2021-06-10 14:38:02,373 INFO L480 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 138 flow [2021-06-10 14:38:02,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 14:38:02,373 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:02,373 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:02,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 14:38:02,374 INFO L428 AbstractCegarLoop]: === Iteration 3 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 14:38:02,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:02,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1173044819, now seen corresponding path program 1 times [2021-06-10 14:38:02,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:02,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470232802] [2021-06-10 14:38:02,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:02,395 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,396 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:38:02,396 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,397 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,400 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,400 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,404 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,405 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 14:38:02,412 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:38:02,412 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 14:38:02,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470232802] [2021-06-10 14:38:02,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:02,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:38:02,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282852493] [2021-06-10 14:38:02,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 14:38:02,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:02,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 14:38:02,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-10 14:38:02,415 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 26 [2021-06-10 14:38:02,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 14:38:02,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:02,415 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 26 [2021-06-10 14:38:02,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:02,499 INFO L129 PetriNetUnfolder]: 55/176 cut-off events. [2021-06-10 14:38:02,499 INFO L130 PetriNetUnfolder]: For 43/47 co-relation queries the response was YES. [2021-06-10 14:38:02,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 176 events. 55/176 cut-off events. For 43/47 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 496 event pairs, 13 based on Foata normal form. 10/183 useless extension candidates. Maximal degree in co-relation 456. Up to 64 conditions per place. [2021-06-10 14:38:02,502 INFO L132 encePairwiseOnDemand]: 19/26 looper letters, 11 selfloop transitions, 14 changer transitions 0/43 dead transitions. [2021-06-10 14:38:02,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 43 transitions, 228 flow [2021-06-10 14:38:02,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:38:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:38:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2021-06-10 14:38:02,510 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7628205128205128 [2021-06-10 14:38:02,510 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 119 transitions. [2021-06-10 14:38:02,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 119 transitions. [2021-06-10 14:38:02,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:02,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 119 transitions. [2021-06-10 14:38:02,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 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 14:38:02,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 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 14:38:02,512 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 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 14:38:02,512 INFO L185 Difference]: Start difference. First operand has 32 places, 31 transitions, 138 flow. Second operand 6 states and 119 transitions. [2021-06-10 14:38:02,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 43 transitions, 228 flow [2021-06-10 14:38:02,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 14:38:02,520 INFO L241 Difference]: Finished difference. Result has 39 places, 39 transitions, 215 flow [2021-06-10 14:38:02,520 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=215, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2021-06-10 14:38:02,520 INFO L343 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2021-06-10 14:38:02,520 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 215 flow [2021-06-10 14:38:02,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 14:38:02,521 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:02,521 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:02,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 14:38:02,521 INFO L428 AbstractCegarLoop]: === Iteration 4 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 14:38:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:02,521 INFO L82 PathProgramCache]: Analyzing trace with hash 312622947, now seen corresponding path program 2 times [2021-06-10 14:38:02,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:02,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862653307] [2021-06-10 14:38:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:02,534 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,534 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:38:02,535 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,535 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,538 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,538 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,542 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,542 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 14:38:02,549 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,549 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:38:02,550 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 14:38:02,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862653307] [2021-06-10 14:38:02,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:02,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:38:02,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761773481] [2021-06-10 14:38:02,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 14:38:02,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:02,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 14:38:02,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-10 14:38:02,552 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 26 [2021-06-10 14:38:02,552 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 14:38:02,552 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:02,552 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 26 [2021-06-10 14:38:02,552 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:02,604 INFO L129 PetriNetUnfolder]: 59/202 cut-off events. [2021-06-10 14:38:02,605 INFO L130 PetriNetUnfolder]: For 191/197 co-relation queries the response was YES. [2021-06-10 14:38:02,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 202 events. 59/202 cut-off events. For 191/197 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 793 event pairs, 11 based on Foata normal form. 12/207 useless extension candidates. Maximal degree in co-relation 565. Up to 71 conditions per place. [2021-06-10 14:38:02,607 INFO L132 encePairwiseOnDemand]: 19/26 looper letters, 15 selfloop transitions, 16 changer transitions 0/49 dead transitions. [2021-06-10 14:38:02,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 323 flow [2021-06-10 14:38:02,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 14:38:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 14:38:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2021-06-10 14:38:02,608 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7923076923076923 [2021-06-10 14:38:02,609 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 103 transitions. [2021-06-10 14:38:02,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 103 transitions. [2021-06-10 14:38:02,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:02,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 103 transitions. [2021-06-10 14:38:02,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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 14:38:02,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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 14:38:02,610 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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 14:38:02,610 INFO L185 Difference]: Start difference. First operand has 39 places, 39 transitions, 215 flow. Second operand 5 states and 103 transitions. [2021-06-10 14:38:02,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 323 flow [2021-06-10 14:38:02,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 312 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-06-10 14:38:02,615 INFO L241 Difference]: Finished difference. Result has 46 places, 42 transitions, 294 flow [2021-06-10 14:38:02,615 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2021-06-10 14:38:02,615 INFO L343 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2021-06-10 14:38:02,615 INFO L480 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 294 flow [2021-06-10 14:38:02,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 14:38:02,615 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:02,615 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:02,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-10 14:38:02,616 INFO L428 AbstractCegarLoop]: === Iteration 5 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 14:38:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:02,616 INFO L82 PathProgramCache]: Analyzing trace with hash -620211087, now seen corresponding path program 1 times [2021-06-10 14:38:02,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:02,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191969410] [2021-06-10 14:38:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:02,631 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,632 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:38:02,632 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,633 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,635 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,636 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,641 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,641 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,646 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,646 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 14:38:02,653 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,654 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:38:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:38:02,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191969410] [2021-06-10 14:38:02,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:02,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-10 14:38:02,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527245755] [2021-06-10 14:38:02,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:38:02,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:02,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:38:02,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:38:02,656 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 26 [2021-06-10 14:38:02,656 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 294 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 14:38:02,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:02,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 26 [2021-06-10 14:38:02,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:02,702 INFO L129 PetriNetUnfolder]: 39/146 cut-off events. [2021-06-10 14:38:02,702 INFO L130 PetriNetUnfolder]: For 376/386 co-relation queries the response was YES. [2021-06-10 14:38:02,703 INFO L84 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 146 events. 39/146 cut-off events. For 376/386 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 452 event pairs, 6 based on Foata normal form. 12/154 useless extension candidates. Maximal degree in co-relation 504. Up to 47 conditions per place. [2021-06-10 14:38:02,703 INFO L132 encePairwiseOnDemand]: 19/26 looper letters, 11 selfloop transitions, 21 changer transitions 0/50 dead transitions. [2021-06-10 14:38:02,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 408 flow [2021-06-10 14:38:02,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-10 14:38:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-10 14:38:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2021-06-10 14:38:02,705 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7472527472527473 [2021-06-10 14:38:02,705 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 136 transitions. [2021-06-10 14:38:02,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 136 transitions. [2021-06-10 14:38:02,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:02,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 136 transitions. [2021-06-10 14:38:02,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 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 14:38:02,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 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 14:38:02,706 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 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 14:38:02,706 INFO L185 Difference]: Start difference. First operand has 46 places, 42 transitions, 294 flow. Second operand 7 states and 136 transitions. [2021-06-10 14:38:02,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 408 flow [2021-06-10 14:38:02,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 50 transitions, 391 flow, removed 6 selfloop flow, removed 1 redundant places. [2021-06-10 14:38:02,710 INFO L241 Difference]: Finished difference. Result has 52 places, 44 transitions, 346 flow [2021-06-10 14:38:02,710 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2021-06-10 14:38:02,710 INFO L343 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2021-06-10 14:38:02,711 INFO L480 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 346 flow [2021-06-10 14:38:02,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 14:38:02,711 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:02,711 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:02,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-10 14:38:02,711 INFO L428 AbstractCegarLoop]: === Iteration 6 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 14:38:02,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:02,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1026698523, now seen corresponding path program 2 times [2021-06-10 14:38:02,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:02,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410301757] [2021-06-10 14:38:02,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:02,722 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,722 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:38:02,723 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,723 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,728 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 14:38:02,736 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,736 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:38:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:38:02,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410301757] [2021-06-10 14:38:02,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:02,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:38:02,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021637241] [2021-06-10 14:38:02,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 14:38:02,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:02,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 14:38:02,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-10 14:38:02,738 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 26 [2021-06-10 14:38:02,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 346 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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) [2021-06-10 14:38:02,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:02,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 26 [2021-06-10 14:38:02,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:02,768 INFO L129 PetriNetUnfolder]: 37/141 cut-off events. [2021-06-10 14:38:02,768 INFO L130 PetriNetUnfolder]: For 494/509 co-relation queries the response was YES. [2021-06-10 14:38:02,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 141 events. 37/141 cut-off events. For 494/509 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 398 event pairs, 5 based on Foata normal form. 13/150 useless extension candidates. Maximal degree in co-relation 510. Up to 45 conditions per place. [2021-06-10 14:38:02,769 INFO L132 encePairwiseOnDemand]: 20/26 looper letters, 17 selfloop transitions, 16 changer transitions 0/51 dead transitions. [2021-06-10 14:38:02,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 51 transitions, 456 flow [2021-06-10 14:38:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 14:38:02,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 14:38:02,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2021-06-10 14:38:02,770 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7769230769230769 [2021-06-10 14:38:02,770 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 101 transitions. [2021-06-10 14:38:02,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 101 transitions. [2021-06-10 14:38:02,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:02,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 101 transitions. [2021-06-10 14:38:02,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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 14:38:02,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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 14:38:02,772 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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 14:38:02,772 INFO L185 Difference]: Start difference. First operand has 52 places, 44 transitions, 346 flow. Second operand 5 states and 101 transitions. [2021-06-10 14:38:02,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 51 transitions, 456 flow [2021-06-10 14:38:02,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 399 flow, removed 7 selfloop flow, removed 6 redundant places. [2021-06-10 14:38:02,775 INFO L241 Difference]: Finished difference. Result has 51 places, 45 transitions, 342 flow [2021-06-10 14:38:02,775 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=342, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2021-06-10 14:38:02,775 INFO L343 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2021-06-10 14:38:02,775 INFO L480 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 342 flow [2021-06-10 14:38:02,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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) [2021-06-10 14:38:02,776 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:02,776 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:02,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-10 14:38:02,776 INFO L428 AbstractCegarLoop]: === Iteration 7 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 14:38:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:02,776 INFO L82 PathProgramCache]: Analyzing trace with hash -941522405, now seen corresponding path program 1 times [2021-06-10 14:38:02,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:02,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342851417] [2021-06-10 14:38:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:02,790 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,791 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:38:02,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,791 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,794 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,794 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,801 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 14:38:02,808 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:38:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:38:02,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342851417] [2021-06-10 14:38:02,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:02,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-10 14:38:02,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349886348] [2021-06-10 14:38:02,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:38:02,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:02,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:38:02,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:38:02,810 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 26 [2021-06-10 14:38:02,811 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 342 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 14:38:02,811 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:02,811 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 26 [2021-06-10 14:38:02,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:02,846 INFO L129 PetriNetUnfolder]: 17/85 cut-off events. [2021-06-10 14:38:02,847 INFO L130 PetriNetUnfolder]: For 364/376 co-relation queries the response was YES. [2021-06-10 14:38:02,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 85 events. 17/85 cut-off events. For 364/376 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 175 event pairs, 1 based on Foata normal form. 11/96 useless extension candidates. Maximal degree in co-relation 336. Up to 21 conditions per place. [2021-06-10 14:38:02,847 INFO L132 encePairwiseOnDemand]: 20/26 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2021-06-10 14:38:02,847 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 435 flow [2021-06-10 14:38:02,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-10 14:38:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-10 14:38:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2021-06-10 14:38:02,849 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7362637362637363 [2021-06-10 14:38:02,849 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 134 transitions. [2021-06-10 14:38:02,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 134 transitions. [2021-06-10 14:38:02,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:02,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 134 transitions. [2021-06-10 14:38:02,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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 14:38:02,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 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 14:38:02,850 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 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 14:38:02,850 INFO L185 Difference]: Start difference. First operand has 51 places, 45 transitions, 342 flow. Second operand 7 states and 134 transitions. [2021-06-10 14:38:02,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 435 flow [2021-06-10 14:38:02,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 45 transitions, 411 flow, removed 5 selfloop flow, removed 3 redundant places. [2021-06-10 14:38:02,853 INFO L241 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2021-06-10 14:38:02,853 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2021-06-10 14:38:02,853 INFO L343 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2021-06-10 14:38:02,853 INFO L480 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2021-06-10 14:38:02,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 14:38:02,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-10 14:38:02,857 INFO L202 PluginConnector]: Adding new model Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 02:38:02 BasicIcfg [2021-06-10 14:38:02,857 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 14:38:02,858 INFO L168 Benchmark]: Toolchain (without parser) took 1074.84 ms. Allocated memory is still 337.6 MB. Free memory was 317.8 MB in the beginning and 202.2 MB in the end (delta: 115.6 MB). Peak memory consumption was 118.1 MB. Max. memory is 16.0 GB. [2021-06-10 14:38:02,858 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 337.6 MB. Free memory was 318.9 MB in the beginning and 318.8 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:38:02,858 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.24 ms. Allocated memory is still 337.6 MB. Free memory was 317.8 MB in the beginning and 316.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 14:38:02,858 INFO L168 Benchmark]: Boogie Preprocessor took 14.24 ms. Allocated memory is still 337.6 MB. Free memory was 316.3 MB in the beginning and 315.4 MB in the end (delta: 917.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:38:02,859 INFO L168 Benchmark]: RCFGBuilder took 172.01 ms. Allocated memory is still 337.6 MB. Free memory was 315.3 MB in the beginning and 305.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-10 14:38:02,859 INFO L168 Benchmark]: TraceAbstraction took 865.33 ms. Allocated memory is still 337.6 MB. Free memory was 304.6 MB in the beginning and 202.2 MB in the end (delta: 102.5 MB). Peak memory consumption was 105.5 MB. Max. memory is 16.0 GB. [2021-06-10 14:38:02,860 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 0.11 ms. Allocated memory is still 337.6 MB. Free memory was 318.9 MB in the beginning and 318.8 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.24 ms. Allocated memory is still 337.6 MB. Free memory was 317.8 MB in the beginning and 316.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.24 ms. Allocated memory is still 337.6 MB. Free memory was 316.3 MB in the beginning and 315.4 MB in the end (delta: 917.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 172.01 ms. Allocated memory is still 337.6 MB. Free memory was 315.3 MB in the beginning and 305.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 865.33 ms. Allocated memory is still 337.6 MB. Free memory was 304.6 MB in the beginning and 202.2 MB in the end (delta: 102.5 MB). Peak memory consumption was 105.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 38]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 53]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 811.7ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 427.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 25.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 46 SDtfs, 66 SDslu, 28 SDs, 0 SdLazy, 135 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 101.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 139.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=346occurred in iteration=5, InterpolantAutomatonStates: 37, 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: 11.9ms SsaConstructionTime, 32.1ms SatisfiabilityAnalysisTime, 206.9ms InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 240 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 15/15 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...