/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/weaver-benchmarks/generated/security.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 15:06:08,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 15:06:08,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 15:06:08,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 15:06:08,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 15:06:08,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 15:06:08,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 15:06:08,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 15:06:08,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 15:06:08,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 15:06:08,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 15:06:08,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 15:06:08,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 15:06:08,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 15:06:08,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 15:06:08,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 15:06:08,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 15:06:08,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 15:06:08,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 15:06:08,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 15:06:08,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 15:06:08,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 15:06:08,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 15:06:08,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 15:06:08,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 15:06:08,697 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 15:06:08,738 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 15:06:08,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 15:06:08,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 15:06:08,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 15:06:08,739 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 15:06:08,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 15:06:08,740 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 15:06:08,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 15:06:08,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 15:06:08,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 15:06:08,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 15:06:08,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 15:06:08,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 15:06:08,741 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 15:06:08,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 15:06:08,741 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 15:06:08,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 15:06:08,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 15:06:08,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 15:06:08,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 15:06:08,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 15:06:08,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 15:06:08,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 15:06:08,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 15:06:08,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 15:06:08,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 15:06:08,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 15:06:08,742 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 15:06:08,742 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 15:06:08,743 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 15:06:09,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 15:06:09,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 15:06:09,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 15:06:09,046 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 15:06:09,049 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 15:06:09,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl [2021-06-10 15:06:09,061 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl' [2021-06-10 15:06:09,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 15:06:09,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 15:06:09,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 15:06:09,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 15:06:09,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 15:06:09,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:06:09" (1/1) ... [2021-06-10 15:06:09,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:06:09" (1/1) ... [2021-06-10 15:06:09,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 15:06:09,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 15:06:09,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 15:06:09,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 15:06:09,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:06:09" (1/1) ... [2021-06-10 15:06:09,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:06:09" (1/1) ... [2021-06-10 15:06:09,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:06:09" (1/1) ... [2021-06-10 15:06:09,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:06:09" (1/1) ... [2021-06-10 15:06:09,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:06:09" (1/1) ... [2021-06-10 15:06:09,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:06:09" (1/1) ... [2021-06-10 15:06:09,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:06:09" (1/1) ... [2021-06-10 15:06:09,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 15:06:09,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 15:06:09,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 15:06:09,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 15:06:09,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:06:09" (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 15:06:09,185 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-10 15:06:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-10 15:06:09,185 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-10 15:06:09,186 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-10 15:06:09,186 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-10 15:06:09,186 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-10 15:06:09,186 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 15:06:09,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 15:06:09,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 15:06:09,187 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 15:06:09,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 15:06:09,300 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 15:06:09,301 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 03:06:09 BoogieIcfgContainer [2021-06-10 15:06:09,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 15:06:09,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 15:06:09,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 15:06:09,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 15:06:09,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:06:09" (1/2) ... [2021-06-10 15:06:09,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a5ba53 and model type security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 03:06:09, skipping insertion in model container [2021-06-10 15:06:09,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 03:06:09" (2/2) ... [2021-06-10 15:06:09,307 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.bpl [2021-06-10 15:06:09,314 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 15:06:09,317 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 15:06:09,318 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 15:06:09,344 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-10 15:06:09,360 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-10 15:06:09,378 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 15:06:09,378 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 15:06:09,378 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 15:06:09,378 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 15:06:09,378 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 15:06:09,379 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 15:06:09,379 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 15:06:09,379 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 15:06:09,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 72 flow [2021-06-10 15:06:09,406 INFO L129 PetriNetUnfolder]: 4/26 cut-off events. [2021-06-10 15:06:09,406 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-10 15:06:09,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2021-06-10 15:06:09,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 28 transitions, 72 flow [2021-06-10 15:06:09,413 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 60 flow [2021-06-10 15:06:09,435 INFO L129 PetriNetUnfolder]: 4/23 cut-off events. [2021-06-10 15:06:09,436 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-10 15:06:09,436 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:09,437 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:09,437 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:09,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:09,441 INFO L82 PathProgramCache]: Analyzing trace with hash 105025108, now seen corresponding path program 1 times [2021-06-10 15:06:09,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:09,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126510729] [2021-06-10 15:06:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:09,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:09,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:09,538 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:09,538 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-10 15:06:09,549 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:09,549 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:09,550 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 15:06:09,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126510729] [2021-06-10 15:06:09,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:09,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 15:06:09,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950851292] [2021-06-10 15:06:09,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 15:06:09,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:09,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 15:06:09,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 15:06:09,573 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 28 [2021-06-10 15:06:09,576 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 15:06:09,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:09,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 28 [2021-06-10 15:06:09,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:09,623 INFO L129 PetriNetUnfolder]: 3/31 cut-off events. [2021-06-10 15:06:09,624 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-10 15:06:09,625 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 31 events. 3/31 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2021-06-10 15:06:09,626 INFO L132 encePairwiseOnDemand]: 25/28 looper letters, 3 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2021-06-10 15:06:09,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 72 flow [2021-06-10 15:06:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 15:06:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 15:06:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2021-06-10 15:06:09,635 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2021-06-10 15:06:09,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 75 transitions. [2021-06-10 15:06:09,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 75 transitions. [2021-06-10 15:06:09,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:09,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 75 transitions. [2021-06-10 15:06:09,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 15:06:09,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 15:06:09,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 15:06:09,645 INFO L185 Difference]: Start difference. First operand has 27 places, 24 transitions, 60 flow. Second operand 3 states and 75 transitions. [2021-06-10 15:06:09,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 72 flow [2021-06-10 15:06:09,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 25 transitions, 64 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-10 15:06:09,651 INFO L241 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2021-06-10 15:06:09,652 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2021-06-10 15:06:09,653 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2021-06-10 15:06:09,653 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2021-06-10 15:06:09,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 15:06:09,653 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:09,653 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:09,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 15:06:09,654 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:09,655 INFO L82 PathProgramCache]: Analyzing trace with hash -200844120, now seen corresponding path program 1 times [2021-06-10 15:06:09,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:09,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974815374] [2021-06-10 15:06:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:09,668 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:09,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:09,669 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:09,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-10 15:06:09,673 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:09,673 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:09,674 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 15:06:09,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974815374] [2021-06-10 15:06:09,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:09,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 15:06:09,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101277422] [2021-06-10 15:06:09,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 15:06:09,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:09,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 15:06:09,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 15:06:09,678 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 28 [2021-06-10 15:06:09,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 15:06:09,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:09,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 28 [2021-06-10 15:06:09,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:09,696 INFO L129 PetriNetUnfolder]: 2/40 cut-off events. [2021-06-10 15:06:09,696 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-10 15:06:09,697 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 40 events. 2/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 35. Up to 4 conditions per place. [2021-06-10 15:06:09,698 INFO L132 encePairwiseOnDemand]: 25/28 looper letters, 3 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2021-06-10 15:06:09,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 78 flow [2021-06-10 15:06:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 15:06:09,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 15:06:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2021-06-10 15:06:09,699 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2021-06-10 15:06:09,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 75 transitions. [2021-06-10 15:06:09,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 75 transitions. [2021-06-10 15:06:09,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:09,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 75 transitions. [2021-06-10 15:06:09,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 15:06:09,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 15:06:09,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 15:06:09,702 INFO L185 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 3 states and 75 transitions. [2021-06-10 15:06:09,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 78 flow [2021-06-10 15:06:09,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 76 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-10 15:06:09,704 INFO L241 Difference]: Finished difference. Result has 30 places, 26 transitions, 78 flow [2021-06-10 15:06:09,704 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2021-06-10 15:06:09,704 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2021-06-10 15:06:09,704 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 78 flow [2021-06-10 15:06:09,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 15:06:09,705 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:09,705 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:09,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 15:06:09,705 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:09,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1818140272, now seen corresponding path program 1 times [2021-06-10 15:06:09,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:09,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140382940] [2021-06-10 15:06:09,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:09,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:09,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:09,792 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:09,793 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:09,812 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:09,813 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:09,828 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:09,830 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:09,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:09,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:09,869 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:09,870 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:09,883 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:09,884 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:09,885 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 15:06:09,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140382940] [2021-06-10 15:06:09,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:09,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 15:06:09,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706677296] [2021-06-10 15:06:09,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-10 15:06:09,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:09,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-10 15:06:09,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-10 15:06:09,893 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2021-06-10 15:06:09,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 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 15:06:09,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:09,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2021-06-10 15:06:09,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:10,076 INFO L129 PetriNetUnfolder]: 31/130 cut-off events. [2021-06-10 15:06:10,076 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-06-10 15:06:10,078 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 130 events. 31/130 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 587 event pairs, 0 based on Foata normal form. 2/126 useless extension candidates. Maximal degree in co-relation 200. Up to 25 conditions per place. [2021-06-10 15:06:10,080 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 13 selfloop transitions, 6 changer transitions 1/38 dead transitions. [2021-06-10 15:06:10,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 38 transitions, 142 flow [2021-06-10 15:06:10,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-10 15:06:10,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-10 15:06:10,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2021-06-10 15:06:10,086 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-06-10 15:06:10,086 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 154 transitions. [2021-06-10 15:06:10,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 154 transitions. [2021-06-10 15:06:10,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:10,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 154 transitions. [2021-06-10 15:06:10,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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 15:06:10,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 15:06:10,093 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 15:06:10,093 INFO L185 Difference]: Start difference. First operand has 30 places, 26 transitions, 78 flow. Second operand 7 states and 154 transitions. [2021-06-10 15:06:10,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 38 transitions, 142 flow [2021-06-10 15:06:10,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 38 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-10 15:06:10,099 INFO L241 Difference]: Finished difference. Result has 39 places, 29 transitions, 112 flow [2021-06-10 15:06:10,100 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=29} [2021-06-10 15:06:10,100 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 12 predicate places. [2021-06-10 15:06:10,100 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 29 transitions, 112 flow [2021-06-10 15:06:10,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 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 15:06:10,101 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:10,101 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:10,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 15:06:10,101 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:10,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1427596002, now seen corresponding path program 2 times [2021-06-10 15:06:10,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:10,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112690440] [2021-06-10 15:06:10,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:10,158 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,159 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:10,160 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:10,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,172 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:10,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,182 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:10,193 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,194 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:10,217 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:10,218 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:10,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:10,230 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 15:06:10,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112690440] [2021-06-10 15:06:10,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:10,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 15:06:10,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084756222] [2021-06-10 15:06:10,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-10 15:06:10,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:10,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-10 15:06:10,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-10 15:06:10,236 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2021-06-10 15:06:10,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 112 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 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 15:06:10,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:10,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2021-06-10 15:06:10,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:10,398 INFO L129 PetriNetUnfolder]: 35/179 cut-off events. [2021-06-10 15:06:10,399 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2021-06-10 15:06:10,401 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 179 events. 35/179 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1029 event pairs, 0 based on Foata normal form. 2/166 useless extension candidates. Maximal degree in co-relation 399. Up to 56 conditions per place. [2021-06-10 15:06:10,402 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 16 selfloop transitions, 6 changer transitions 5/45 dead transitions. [2021-06-10 15:06:10,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 237 flow [2021-06-10 15:06:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-10 15:06:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-10 15:06:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2021-06-10 15:06:10,405 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7959183673469388 [2021-06-10 15:06:10,405 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 156 transitions. [2021-06-10 15:06:10,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 156 transitions. [2021-06-10 15:06:10,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:10,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 156 transitions. [2021-06-10 15:06:10,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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 15:06:10,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 15:06:10,408 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 15:06:10,408 INFO L185 Difference]: Start difference. First operand has 39 places, 29 transitions, 112 flow. Second operand 7 states and 156 transitions. [2021-06-10 15:06:10,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 237 flow [2021-06-10 15:06:10,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 222 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-06-10 15:06:10,415 INFO L241 Difference]: Finished difference. Result has 46 places, 32 transitions, 157 flow [2021-06-10 15:06:10,415 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=157, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2021-06-10 15:06:10,416 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 19 predicate places. [2021-06-10 15:06:10,416 INFO L480 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 157 flow [2021-06-10 15:06:10,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 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 15:06:10,416 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:10,416 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:10,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-10 15:06:10,417 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:10,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:10,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1882345411, now seen corresponding path program 1 times [2021-06-10 15:06:10,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:10,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726630337] [2021-06-10 15:06:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:10,469 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,470 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:10,470 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,471 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:10,477 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,477 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:10,486 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,491 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:10,502 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,504 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:10,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:10,525 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:10,527 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:10,540 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,541 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:10,541 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 15:06:10,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726630337] [2021-06-10 15:06:10,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:10,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:10,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355087876] [2021-06-10 15:06:10,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:10,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:10,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:10,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:10,545 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:10,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 157 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:10,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:10,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:10,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:10,784 INFO L129 PetriNetUnfolder]: 44/226 cut-off events. [2021-06-10 15:06:10,784 INFO L130 PetriNetUnfolder]: For 361/361 co-relation queries the response was YES. [2021-06-10 15:06:10,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 226 events. 44/226 cut-off events. For 361/361 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1342 event pairs, 0 based on Foata normal form. 6/220 useless extension candidates. Maximal degree in co-relation 606. Up to 42 conditions per place. [2021-06-10 15:06:10,786 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 22 selfloop transitions, 9 changer transitions 6/54 dead transitions. [2021-06-10 15:06:10,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 54 transitions, 366 flow [2021-06-10 15:06:10,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 15:06:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 15:06:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2021-06-10 15:06:10,789 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-06-10 15:06:10,789 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 210 transitions. [2021-06-10 15:06:10,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 210 transitions. [2021-06-10 15:06:10,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:10,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 210 transitions. [2021-06-10 15:06:10,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 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 15:06:10,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 28.0) internal successors, (308), 11 states have internal predecessors, (308), 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 15:06:10,792 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 28.0) internal successors, (308), 11 states have internal predecessors, (308), 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 15:06:10,792 INFO L185 Difference]: Start difference. First operand has 46 places, 32 transitions, 157 flow. Second operand 10 states and 210 transitions. [2021-06-10 15:06:10,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 54 transitions, 366 flow [2021-06-10 15:06:10,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 342 flow, removed 10 selfloop flow, removed 3 redundant places. [2021-06-10 15:06:10,800 INFO L241 Difference]: Finished difference. Result has 57 places, 35 transitions, 213 flow [2021-06-10 15:06:10,800 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=213, PETRI_PLACES=57, PETRI_TRANSITIONS=35} [2021-06-10 15:06:10,800 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 30 predicate places. [2021-06-10 15:06:10,800 INFO L480 AbstractCegarLoop]: Abstraction has has 57 places, 35 transitions, 213 flow [2021-06-10 15:06:10,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:10,801 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:10,801 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:10,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-10 15:06:10,801 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:10,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:10,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2025561099, now seen corresponding path program 2 times [2021-06-10 15:06:10,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:10,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912560945] [2021-06-10 15:06:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:10,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:10,852 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:10,863 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:10,871 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,871 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:10,879 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:10,893 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,893 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:10,907 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:10,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:10,919 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:10,920 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:10,920 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 15:06:10,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912560945] [2021-06-10 15:06:10,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:10,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:10,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882328796] [2021-06-10 15:06:10,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:10,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:10,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:10,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:10,922 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:10,923 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 35 transitions, 213 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:10,923 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:10,923 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:10,923 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:11,117 INFO L129 PetriNetUnfolder]: 42/211 cut-off events. [2021-06-10 15:06:11,118 INFO L130 PetriNetUnfolder]: For 624/628 co-relation queries the response was YES. [2021-06-10 15:06:11,119 INFO L84 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 211 events. 42/211 cut-off events. For 624/628 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1220 event pairs, 0 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 662. Up to 43 conditions per place. [2021-06-10 15:06:11,122 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 25 selfloop transitions, 7 changer transitions 7/56 dead transitions. [2021-06-10 15:06:11,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 56 transitions, 452 flow [2021-06-10 15:06:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-10 15:06:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-10 15:06:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2021-06-10 15:06:11,123 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.753968253968254 [2021-06-10 15:06:11,123 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 190 transitions. [2021-06-10 15:06:11,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 190 transitions. [2021-06-10 15:06:11,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:11,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 190 transitions. [2021-06-10 15:06:11,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 21.11111111111111) internal successors, (190), 9 states have internal predecessors, (190), 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 15:06:11,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 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 15:06:11,126 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 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 15:06:11,126 INFO L185 Difference]: Start difference. First operand has 57 places, 35 transitions, 213 flow. Second operand 9 states and 190 transitions. [2021-06-10 15:06:11,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 56 transitions, 452 flow [2021-06-10 15:06:11,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 406 flow, removed 12 selfloop flow, removed 6 redundant places. [2021-06-10 15:06:11,131 INFO L241 Difference]: Finished difference. Result has 59 places, 35 transitions, 215 flow [2021-06-10 15:06:11,131 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=215, PETRI_PLACES=59, PETRI_TRANSITIONS=35} [2021-06-10 15:06:11,132 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 32 predicate places. [2021-06-10 15:06:11,132 INFO L480 AbstractCegarLoop]: Abstraction has has 59 places, 35 transitions, 215 flow [2021-06-10 15:06:11,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:11,132 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:11,132 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:11,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-10 15:06:11,133 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:11,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:11,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1726756319, now seen corresponding path program 3 times [2021-06-10 15:06:11,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:11,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684014730] [2021-06-10 15:06:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:11,181 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,181 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:11,182 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:11,188 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,188 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:11,198 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:11,211 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,212 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:11,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:11,237 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:11,238 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:11,248 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,249 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:11,250 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 15:06:11,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684014730] [2021-06-10 15:06:11,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:11,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:11,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017138658] [2021-06-10 15:06:11,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:11,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:11,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:11,252 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:11,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 35 transitions, 215 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:11,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:11,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:11,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:11,423 INFO L129 PetriNetUnfolder]: 43/225 cut-off events. [2021-06-10 15:06:11,424 INFO L130 PetriNetUnfolder]: For 717/717 co-relation queries the response was YES. [2021-06-10 15:06:11,425 INFO L84 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 225 events. 43/225 cut-off events. For 717/717 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1354 event pairs, 2 based on Foata normal form. 2/215 useless extension candidates. Maximal degree in co-relation 710. Up to 54 conditions per place. [2021-06-10 15:06:11,426 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 28 selfloop transitions, 7 changer transitions 6/58 dead transitions. [2021-06-10 15:06:11,426 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 492 flow [2021-06-10 15:06:11,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 15:06:11,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 15:06:11,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2021-06-10 15:06:11,427 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7767857142857143 [2021-06-10 15:06:11,427 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 174 transitions. [2021-06-10 15:06:11,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 174 transitions. [2021-06-10 15:06:11,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:11,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 174 transitions. [2021-06-10 15:06:11,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 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 15:06:11,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:11,429 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:11,429 INFO L185 Difference]: Start difference. First operand has 59 places, 35 transitions, 215 flow. Second operand 8 states and 174 transitions. [2021-06-10 15:06:11,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 492 flow [2021-06-10 15:06:11,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 438 flow, removed 5 selfloop flow, removed 8 redundant places. [2021-06-10 15:06:11,434 INFO L241 Difference]: Finished difference. Result has 60 places, 37 transitions, 245 flow [2021-06-10 15:06:11,434 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=60, PETRI_TRANSITIONS=37} [2021-06-10 15:06:11,434 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 33 predicate places. [2021-06-10 15:06:11,434 INFO L480 AbstractCegarLoop]: Abstraction has has 60 places, 37 transitions, 245 flow [2021-06-10 15:06:11,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:11,435 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:11,435 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:11,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-10 15:06:11,435 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:11,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1266652379, now seen corresponding path program 4 times [2021-06-10 15:06:11,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:11,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144708195] [2021-06-10 15:06:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:11,451 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:11,452 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,453 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:11,457 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,457 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:11,463 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,463 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:11,470 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,470 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:11,478 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,478 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:11,487 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:11,488 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:11,497 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,497 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:11,498 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 15:06:11,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144708195] [2021-06-10 15:06:11,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:11,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:11,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532174666] [2021-06-10 15:06:11,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:11,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:11,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:11,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:11,500 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:11,500 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 37 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:11,500 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:11,500 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:11,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:11,663 INFO L129 PetriNetUnfolder]: 73/400 cut-off events. [2021-06-10 15:06:11,663 INFO L130 PetriNetUnfolder]: For 1601/1614 co-relation queries the response was YES. [2021-06-10 15:06:11,664 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1357 conditions, 400 events. 73/400 cut-off events. For 1601/1614 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3022 event pairs, 21 based on Foata normal form. 6/383 useless extension candidates. Maximal degree in co-relation 1273. Up to 96 conditions per place. [2021-06-10 15:06:11,666 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 39 selfloop transitions, 8 changer transitions 6/70 dead transitions. [2021-06-10 15:06:11,666 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 70 transitions, 647 flow [2021-06-10 15:06:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 15:06:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 15:06:11,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2021-06-10 15:06:11,668 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-06-10 15:06:11,668 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 176 transitions. [2021-06-10 15:06:11,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 176 transitions. [2021-06-10 15:06:11,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:11,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 176 transitions. [2021-06-10 15:06:11,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 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 15:06:11,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:11,670 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:11,670 INFO L185 Difference]: Start difference. First operand has 60 places, 37 transitions, 245 flow. Second operand 8 states and 176 transitions. [2021-06-10 15:06:11,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 70 transitions, 647 flow [2021-06-10 15:06:11,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 70 transitions, 619 flow, removed 6 selfloop flow, removed 4 redundant places. [2021-06-10 15:06:11,676 INFO L241 Difference]: Finished difference. Result has 67 places, 43 transitions, 338 flow [2021-06-10 15:06:11,676 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=67, PETRI_TRANSITIONS=43} [2021-06-10 15:06:11,677 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 40 predicate places. [2021-06-10 15:06:11,677 INFO L480 AbstractCegarLoop]: Abstraction has has 67 places, 43 transitions, 338 flow [2021-06-10 15:06:11,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:11,677 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:11,677 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:11,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-10 15:06:11,677 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:11,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:11,678 INFO L82 PathProgramCache]: Analyzing trace with hash 2147134873, now seen corresponding path program 5 times [2021-06-10 15:06:11,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:11,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889648175] [2021-06-10 15:06:11,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:11,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:11,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:11,728 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,728 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:11,734 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:11,742 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,742 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:11,749 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,752 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:11,761 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:11,762 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:11,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:11,771 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:11,771 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 15:06:11,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889648175] [2021-06-10 15:06:11,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:11,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:11,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394382465] [2021-06-10 15:06:11,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:11,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:11,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:11,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:11,774 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:11,775 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 43 transitions, 338 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:11,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:11,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:11,775 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:12,043 INFO L129 PetriNetUnfolder]: 69/533 cut-off events. [2021-06-10 15:06:12,044 INFO L130 PetriNetUnfolder]: For 2334/2345 co-relation queries the response was YES. [2021-06-10 15:06:12,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1822 conditions, 533 events. 69/533 cut-off events. For 2334/2345 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4677 event pairs, 20 based on Foata normal form. 12/520 useless extension candidates. Maximal degree in co-relation 1686. Up to 88 conditions per place. [2021-06-10 15:06:12,048 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 46 selfloop transitions, 22 changer transitions 9/94 dead transitions. [2021-06-10 15:06:12,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 978 flow [2021-06-10 15:06:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-10 15:06:12,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-06-10 15:06:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2021-06-10 15:06:12,050 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7797619047619048 [2021-06-10 15:06:12,050 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 262 transitions. [2021-06-10 15:06:12,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 262 transitions. [2021-06-10 15:06:12,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:12,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 262 transitions. [2021-06-10 15:06:12,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 21.833333333333332) internal successors, (262), 12 states have internal predecessors, (262), 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 15:06:12,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 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 15:06:12,053 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 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 15:06:12,053 INFO L185 Difference]: Start difference. First operand has 67 places, 43 transitions, 338 flow. Second operand 12 states and 262 transitions. [2021-06-10 15:06:12,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 978 flow [2021-06-10 15:06:12,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 941 flow, removed 17 selfloop flow, removed 3 redundant places. [2021-06-10 15:06:12,063 INFO L241 Difference]: Finished difference. Result has 83 places, 59 transitions, 623 flow [2021-06-10 15:06:12,063 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=623, PETRI_PLACES=83, PETRI_TRANSITIONS=59} [2021-06-10 15:06:12,063 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 56 predicate places. [2021-06-10 15:06:12,064 INFO L480 AbstractCegarLoop]: Abstraction has has 83 places, 59 transitions, 623 flow [2021-06-10 15:06:12,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:12,064 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:12,064 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:12,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-10 15:06:12,064 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:12,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:12,065 INFO L82 PathProgramCache]: Analyzing trace with hash 838253913, now seen corresponding path program 6 times [2021-06-10 15:06:12,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:12,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881053952] [2021-06-10 15:06:12,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:12,093 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,093 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:12,094 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,095 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:12,100 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,100 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:12,105 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:12,116 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,116 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:12,124 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:12,136 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:12,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:12,146 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,146 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:12,147 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 15:06:12,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881053952] [2021-06-10 15:06:12,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:12,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:12,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551689865] [2021-06-10 15:06:12,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:12,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:12,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:12,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:12,152 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:12,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 59 transitions, 623 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:12,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:12,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:12,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:12,421 INFO L129 PetriNetUnfolder]: 63/578 cut-off events. [2021-06-10 15:06:12,421 INFO L130 PetriNetUnfolder]: For 4032/4050 co-relation queries the response was YES. [2021-06-10 15:06:12,423 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2311 conditions, 578 events. 63/578 cut-off events. For 4032/4050 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5319 event pairs, 10 based on Foata normal form. 13/565 useless extension candidates. Maximal degree in co-relation 2114. Up to 158 conditions per place. [2021-06-10 15:06:12,426 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 43 selfloop transitions, 26 changer transitions 9/95 dead transitions. [2021-06-10 15:06:12,426 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 95 transitions, 1230 flow [2021-06-10 15:06:12,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-10 15:06:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-06-10 15:06:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2021-06-10 15:06:12,428 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7694805194805194 [2021-06-10 15:06:12,428 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 237 transitions. [2021-06-10 15:06:12,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 237 transitions. [2021-06-10 15:06:12,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:12,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 237 transitions. [2021-06-10 15:06:12,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 21.545454545454547) internal successors, (237), 11 states have internal predecessors, (237), 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 15:06:12,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 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 15:06:12,430 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 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 15:06:12,430 INFO L185 Difference]: Start difference. First operand has 83 places, 59 transitions, 623 flow. Second operand 11 states and 237 transitions. [2021-06-10 15:06:12,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 95 transitions, 1230 flow [2021-06-10 15:06:12,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 95 transitions, 1169 flow, removed 29 selfloop flow, removed 3 redundant places. [2021-06-10 15:06:12,447 INFO L241 Difference]: Finished difference. Result has 96 places, 70 transitions, 849 flow [2021-06-10 15:06:12,448 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=849, PETRI_PLACES=96, PETRI_TRANSITIONS=70} [2021-06-10 15:06:12,448 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 69 predicate places. [2021-06-10 15:06:12,448 INFO L480 AbstractCegarLoop]: Abstraction has has 96 places, 70 transitions, 849 flow [2021-06-10 15:06:12,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:12,449 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:12,449 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:12,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-10 15:06:12,449 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:12,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:12,450 INFO L82 PathProgramCache]: Analyzing trace with hash -990678411, now seen corresponding path program 7 times [2021-06-10 15:06:12,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:12,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396224557] [2021-06-10 15:06:12,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:12,470 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,470 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:12,471 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,471 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:12,476 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:12,483 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,484 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:12,491 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:12,501 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,502 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:12,512 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:12,512 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:12,522 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,523 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:12,523 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 15:06:12,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396224557] [2021-06-10 15:06:12,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:12,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:12,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064002210] [2021-06-10 15:06:12,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:12,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:12,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:12,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:12,526 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:12,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 70 transitions, 849 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:12,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:12,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:12,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:12,778 INFO L129 PetriNetUnfolder]: 59/560 cut-off events. [2021-06-10 15:06:12,778 INFO L130 PetriNetUnfolder]: For 4973/4996 co-relation queries the response was YES. [2021-06-10 15:06:12,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2423 conditions, 560 events. 59/560 cut-off events. For 4973/4996 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5105 event pairs, 7 based on Foata normal form. 8/542 useless extension candidates. Maximal degree in co-relation 2220. Up to 106 conditions per place. [2021-06-10 15:06:12,783 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 49 selfloop transitions, 23 changer transitions 16/105 dead transitions. [2021-06-10 15:06:12,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 105 transitions, 1513 flow [2021-06-10 15:06:12,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 15:06:12,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 15:06:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2021-06-10 15:06:12,785 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.775 [2021-06-10 15:06:12,785 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 217 transitions. [2021-06-10 15:06:12,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 217 transitions. [2021-06-10 15:06:12,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:12,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 217 transitions. [2021-06-10 15:06:12,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 21.7) internal successors, (217), 10 states have internal predecessors, (217), 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 15:06:12,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 28.0) internal successors, (308), 11 states have internal predecessors, (308), 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 15:06:12,787 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 28.0) internal successors, (308), 11 states have internal predecessors, (308), 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 15:06:12,787 INFO L185 Difference]: Start difference. First operand has 96 places, 70 transitions, 849 flow. Second operand 10 states and 217 transitions. [2021-06-10 15:06:12,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 105 transitions, 1513 flow [2021-06-10 15:06:12,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 105 transitions, 1446 flow, removed 24 selfloop flow, removed 4 redundant places. [2021-06-10 15:06:12,814 INFO L241 Difference]: Finished difference. Result has 105 places, 74 transitions, 969 flow [2021-06-10 15:06:12,815 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=969, PETRI_PLACES=105, PETRI_TRANSITIONS=74} [2021-06-10 15:06:12,815 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 78 predicate places. [2021-06-10 15:06:12,815 INFO L480 AbstractCegarLoop]: Abstraction has has 105 places, 74 transitions, 969 flow [2021-06-10 15:06:12,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:12,815 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:12,816 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:12,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-10 15:06:12,816 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:12,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:12,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1164927733, now seen corresponding path program 8 times [2021-06-10 15:06:12,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:12,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619519214] [2021-06-10 15:06:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:12,834 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:12,835 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,836 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:12,842 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,843 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:12,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,852 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:12,859 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:12,867 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,868 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:12,879 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:12,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:12,891 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:12,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:12,892 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 15:06:12,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619519214] [2021-06-10 15:06:12,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:12,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:12,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757189759] [2021-06-10 15:06:12,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:12,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:12,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:12,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:12,893 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:12,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 74 transitions, 969 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:12,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:12,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:12,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:13,119 INFO L129 PetriNetUnfolder]: 54/581 cut-off events. [2021-06-10 15:06:13,119 INFO L130 PetriNetUnfolder]: For 5686/5704 co-relation queries the response was YES. [2021-06-10 15:06:13,122 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2577 conditions, 581 events. 54/581 cut-off events. For 5686/5704 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5459 event pairs, 13 based on Foata normal form. 7/563 useless extension candidates. Maximal degree in co-relation 2391. Up to 134 conditions per place. [2021-06-10 15:06:13,124 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 53 selfloop transitions, 21 changer transitions 2/93 dead transitions. [2021-06-10 15:06:13,124 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 93 transitions, 1410 flow [2021-06-10 15:06:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 15:06:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 15:06:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2021-06-10 15:06:13,126 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7901785714285714 [2021-06-10 15:06:13,126 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 177 transitions. [2021-06-10 15:06:13,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 177 transitions. [2021-06-10 15:06:13,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:13,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 177 transitions. [2021-06-10 15:06:13,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 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 15:06:13,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:13,127 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:13,127 INFO L185 Difference]: Start difference. First operand has 105 places, 74 transitions, 969 flow. Second operand 8 states and 177 transitions. [2021-06-10 15:06:13,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 93 transitions, 1410 flow [2021-06-10 15:06:13,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 93 transitions, 1322 flow, removed 29 selfloop flow, removed 5 redundant places. [2021-06-10 15:06:13,154 INFO L241 Difference]: Finished difference. Result has 109 places, 80 transitions, 1099 flow [2021-06-10 15:06:13,154 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1099, PETRI_PLACES=109, PETRI_TRANSITIONS=80} [2021-06-10 15:06:13,155 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 82 predicate places. [2021-06-10 15:06:13,155 INFO L480 AbstractCegarLoop]: Abstraction has has 109 places, 80 transitions, 1099 flow [2021-06-10 15:06:13,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:13,155 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:13,155 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:13,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-10 15:06:13,155 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:13,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:13,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1126555605, now seen corresponding path program 9 times [2021-06-10 15:06:13,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:13,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083080553] [2021-06-10 15:06:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:13,184 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,185 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:13,185 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:13,191 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,192 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:13,198 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,198 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:13,204 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,206 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:13,215 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,215 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:13,225 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:13,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:13,236 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,236 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:13,237 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 15:06:13,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083080553] [2021-06-10 15:06:13,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:13,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:13,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938113843] [2021-06-10 15:06:13,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:13,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:13,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:13,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:13,239 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:13,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 80 transitions, 1099 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:13,239 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:13,239 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:13,239 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:13,533 INFO L129 PetriNetUnfolder]: 46/654 cut-off events. [2021-06-10 15:06:13,534 INFO L130 PetriNetUnfolder]: For 6006/6030 co-relation queries the response was YES. [2021-06-10 15:06:13,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2793 conditions, 654 events. 46/654 cut-off events. For 6006/6030 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6525 event pairs, 7 based on Foata normal form. 13/642 useless extension candidates. Maximal degree in co-relation 2585. Up to 107 conditions per place. [2021-06-10 15:06:13,539 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 51 selfloop transitions, 40 changer transitions 5/113 dead transitions. [2021-06-10 15:06:13,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 113 transitions, 1769 flow [2021-06-10 15:06:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-10 15:06:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-06-10 15:06:13,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2021-06-10 15:06:13,540 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7767857142857143 [2021-06-10 15:06:13,540 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 261 transitions. [2021-06-10 15:06:13,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 261 transitions. [2021-06-10 15:06:13,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:13,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 261 transitions. [2021-06-10 15:06:13,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 21.75) internal successors, (261), 12 states have internal predecessors, (261), 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 15:06:13,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 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 15:06:13,543 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 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 15:06:13,543 INFO L185 Difference]: Start difference. First operand has 109 places, 80 transitions, 1099 flow. Second operand 12 states and 261 transitions. [2021-06-10 15:06:13,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 113 transitions, 1769 flow [2021-06-10 15:06:13,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 113 transitions, 1725 flow, removed 14 selfloop flow, removed 4 redundant places. [2021-06-10 15:06:13,572 INFO L241 Difference]: Finished difference. Result has 123 places, 95 transitions, 1474 flow [2021-06-10 15:06:13,572 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1474, PETRI_PLACES=123, PETRI_TRANSITIONS=95} [2021-06-10 15:06:13,572 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 96 predicate places. [2021-06-10 15:06:13,572 INFO L480 AbstractCegarLoop]: Abstraction has has 123 places, 95 transitions, 1474 flow [2021-06-10 15:06:13,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:13,573 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:13,573 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:13,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-10 15:06:13,573 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:13,574 INFO L82 PathProgramCache]: Analyzing trace with hash 352692725, now seen corresponding path program 10 times [2021-06-10 15:06:13,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:13,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892536817] [2021-06-10 15:06:13,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:13,593 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,594 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:13,595 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,596 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:13,600 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,601 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:13,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:13,614 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,614 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:13,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,622 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:13,632 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:13,632 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:13,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:13,642 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 15:06:13,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892536817] [2021-06-10 15:06:13,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:13,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:13,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353237580] [2021-06-10 15:06:13,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:13,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:13,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:13,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:13,645 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:13,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 95 transitions, 1474 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:13,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:13,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:13,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:13,879 INFO L129 PetriNetUnfolder]: 46/610 cut-off events. [2021-06-10 15:06:13,879 INFO L130 PetriNetUnfolder]: For 6899/6919 co-relation queries the response was YES. [2021-06-10 15:06:13,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2877 conditions, 610 events. 46/610 cut-off events. For 6899/6919 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5962 event pairs, 7 based on Foata normal form. 18/603 useless extension candidates. Maximal degree in co-relation 2671. Up to 137 conditions per place. [2021-06-10 15:06:13,884 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 54 selfloop transitions, 8 changer transitions 36/115 dead transitions. [2021-06-10 15:06:13,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 115 transitions, 2025 flow [2021-06-10 15:06:13,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 15:06:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 15:06:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2021-06-10 15:06:13,886 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-06-10 15:06:13,886 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 176 transitions. [2021-06-10 15:06:13,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 176 transitions. [2021-06-10 15:06:13,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:13,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 176 transitions. [2021-06-10 15:06:13,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 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 15:06:13,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:13,887 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:13,888 INFO L185 Difference]: Start difference. First operand has 123 places, 95 transitions, 1474 flow. Second operand 8 states and 176 transitions. [2021-06-10 15:06:13,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 115 transitions, 2025 flow [2021-06-10 15:06:13,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 115 transitions, 1925 flow, removed 22 selfloop flow, removed 6 redundant places. [2021-06-10 15:06:13,919 INFO L241 Difference]: Finished difference. Result has 124 places, 72 transitions, 964 flow [2021-06-10 15:06:13,919 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=964, PETRI_PLACES=124, PETRI_TRANSITIONS=72} [2021-06-10 15:06:13,919 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 97 predicate places. [2021-06-10 15:06:13,919 INFO L480 AbstractCegarLoop]: Abstraction has has 124 places, 72 transitions, 964 flow [2021-06-10 15:06:13,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:13,919 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:13,920 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:13,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-10 15:06:13,920 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:13,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1532714621, now seen corresponding path program 11 times [2021-06-10 15:06:13,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:13,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421471950] [2021-06-10 15:06:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:13,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:13,943 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,943 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:13,947 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,948 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:13,953 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,954 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:13,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:13,969 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:13,979 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:13,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:13,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:13,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:13,990 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 15:06:13,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421471950] [2021-06-10 15:06:13,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:13,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:13,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844023779] [2021-06-10 15:06:13,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:13,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:13,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:13,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:13,993 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:13,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 72 transitions, 964 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:13,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:13,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:13,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:14,257 INFO L129 PetriNetUnfolder]: 39/474 cut-off events. [2021-06-10 15:06:14,258 INFO L130 PetriNetUnfolder]: For 4862/4869 co-relation queries the response was YES. [2021-06-10 15:06:14,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2182 conditions, 474 events. 39/474 cut-off events. For 4862/4869 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4243 event pairs, 7 based on Foata normal form. 10/463 useless extension candidates. Maximal degree in co-relation 2043. Up to 107 conditions per place. [2021-06-10 15:06:14,262 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 32 selfloop transitions, 19 changer transitions 18/86 dead transitions. [2021-06-10 15:06:14,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 86 transitions, 1314 flow [2021-06-10 15:06:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-10 15:06:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-06-10 15:06:14,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2021-06-10 15:06:14,263 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7589285714285714 [2021-06-10 15:06:14,263 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 255 transitions. [2021-06-10 15:06:14,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 255 transitions. [2021-06-10 15:06:14,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:14,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 255 transitions. [2021-06-10 15:06:14,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 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 15:06:14,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 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 15:06:14,265 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 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 15:06:14,265 INFO L185 Difference]: Start difference. First operand has 124 places, 72 transitions, 964 flow. Second operand 12 states and 255 transitions. [2021-06-10 15:06:14,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 86 transitions, 1314 flow [2021-06-10 15:06:14,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 86 transitions, 1217 flow, removed 30 selfloop flow, removed 13 redundant places. [2021-06-10 15:06:14,286 INFO L241 Difference]: Finished difference. Result has 120 places, 62 transitions, 791 flow [2021-06-10 15:06:14,286 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=791, PETRI_PLACES=120, PETRI_TRANSITIONS=62} [2021-06-10 15:06:14,286 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 93 predicate places. [2021-06-10 15:06:14,286 INFO L480 AbstractCegarLoop]: Abstraction has has 120 places, 62 transitions, 791 flow [2021-06-10 15:06:14,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:14,286 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:14,286 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:14,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-10 15:06:14,287 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:14,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1979533845, now seen corresponding path program 12 times [2021-06-10 15:06:14,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:14,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707681115] [2021-06-10 15:06:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:14,296 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,297 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:14,297 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:14,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:14,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:14,315 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:14,323 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:14,335 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:14,336 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:14,346 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,346 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:14,347 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 15:06:14,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707681115] [2021-06-10 15:06:14,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:14,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:14,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730804130] [2021-06-10 15:06:14,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:14,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:14,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:14,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:14,350 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:14,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 62 transitions, 791 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:14,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:14,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:14,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:14,507 INFO L129 PetriNetUnfolder]: 34/370 cut-off events. [2021-06-10 15:06:14,507 INFO L130 PetriNetUnfolder]: For 3473/3486 co-relation queries the response was YES. [2021-06-10 15:06:14,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1688 conditions, 370 events. 34/370 cut-off events. For 3473/3486 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3016 event pairs, 5 based on Foata normal form. 5/358 useless extension candidates. Maximal degree in co-relation 1601. Up to 115 conditions per place. [2021-06-10 15:06:14,511 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 35 selfloop transitions, 12 changer transitions 9/73 dead transitions. [2021-06-10 15:06:14,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 73 transitions, 1057 flow [2021-06-10 15:06:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 15:06:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 15:06:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2021-06-10 15:06:14,512 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7633928571428571 [2021-06-10 15:06:14,512 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 171 transitions. [2021-06-10 15:06:14,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 171 transitions. [2021-06-10 15:06:14,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:14,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 171 transitions. [2021-06-10 15:06:14,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 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 15:06:14,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:14,514 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:14,514 INFO L185 Difference]: Start difference. First operand has 120 places, 62 transitions, 791 flow. Second operand 8 states and 171 transitions. [2021-06-10 15:06:14,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 73 transitions, 1057 flow [2021-06-10 15:06:14,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 73 transitions, 947 flow, removed 23 selfloop flow, removed 17 redundant places. [2021-06-10 15:06:14,529 INFO L241 Difference]: Finished difference. Result has 103 places, 60 transitions, 702 flow [2021-06-10 15:06:14,529 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=702, PETRI_PLACES=103, PETRI_TRANSITIONS=60} [2021-06-10 15:06:14,529 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 76 predicate places. [2021-06-10 15:06:14,529 INFO L480 AbstractCegarLoop]: Abstraction has has 103 places, 60 transitions, 702 flow [2021-06-10 15:06:14,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:14,530 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:14,530 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:14,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-10 15:06:14,530 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:14,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:14,530 INFO L82 PathProgramCache]: Analyzing trace with hash -53920793, now seen corresponding path program 13 times [2021-06-10 15:06:14,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:14,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002537095] [2021-06-10 15:06:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:14,546 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,547 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:14,547 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,547 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:14,552 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:14,558 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,558 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:14,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:14,573 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:14,587 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:14,588 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:14,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,598 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:14,598 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 15:06:14,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002537095] [2021-06-10 15:06:14,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:14,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:14,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288447539] [2021-06-10 15:06:14,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:14,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:14,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:14,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:14,600 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:14,600 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 60 transitions, 702 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:14,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:14,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:14,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:14,805 INFO L129 PetriNetUnfolder]: 32/334 cut-off events. [2021-06-10 15:06:14,805 INFO L130 PetriNetUnfolder]: For 2764/2775 co-relation queries the response was YES. [2021-06-10 15:06:14,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1471 conditions, 334 events. 32/334 cut-off events. For 2764/2775 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2608 event pairs, 5 based on Foata normal form. 9/328 useless extension candidates. Maximal degree in co-relation 1393. Up to 102 conditions per place. [2021-06-10 15:06:14,808 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 22 selfloop transitions, 12 changer transitions 17/68 dead transitions. [2021-06-10 15:06:14,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 68 transitions, 913 flow [2021-06-10 15:06:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-10 15:06:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-06-10 15:06:14,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2021-06-10 15:06:14,809 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7402597402597403 [2021-06-10 15:06:14,809 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 228 transitions. [2021-06-10 15:06:14,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 228 transitions. [2021-06-10 15:06:14,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:14,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 228 transitions. [2021-06-10 15:06:14,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 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 15:06:14,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 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 15:06:14,812 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 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 15:06:14,812 INFO L185 Difference]: Start difference. First operand has 103 places, 60 transitions, 702 flow. Second operand 11 states and 228 transitions. [2021-06-10 15:06:14,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 68 transitions, 913 flow [2021-06-10 15:06:14,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 68 transitions, 875 flow, removed 5 selfloop flow, removed 7 redundant places. [2021-06-10 15:06:14,824 INFO L241 Difference]: Finished difference. Result has 106 places, 48 transitions, 521 flow [2021-06-10 15:06:14,824 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=521, PETRI_PLACES=106, PETRI_TRANSITIONS=48} [2021-06-10 15:06:14,824 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 79 predicate places. [2021-06-10 15:06:14,824 INFO L480 AbstractCegarLoop]: Abstraction has has 106 places, 48 transitions, 521 flow [2021-06-10 15:06:14,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:14,825 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:14,825 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:14,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-10 15:06:14,825 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1732449431, now seen corresponding path program 14 times [2021-06-10 15:06:14,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:14,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998874224] [2021-06-10 15:06:14,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:14,860 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:14,861 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:14,866 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:14,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,879 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:14,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:14,895 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:14,905 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:14,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:14,916 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:14,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:14,916 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 15:06:14,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998874224] [2021-06-10 15:06:14,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:14,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:14,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305707915] [2021-06-10 15:06:14,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:14,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:14,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:14,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:14,918 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:14,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 48 transitions, 521 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:14,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:14,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:14,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:15,070 INFO L129 PetriNetUnfolder]: 29/284 cut-off events. [2021-06-10 15:06:15,071 INFO L130 PetriNetUnfolder]: For 2306/2319 co-relation queries the response was YES. [2021-06-10 15:06:15,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1255 conditions, 284 events. 29/284 cut-off events. For 2306/2319 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2106 event pairs, 4 based on Foata normal form. 6/277 useless extension candidates. Maximal degree in co-relation 1216. Up to 47 conditions per place. [2021-06-10 15:06:15,073 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 26 selfloop transitions, 12 changer transitions 8/63 dead transitions. [2021-06-10 15:06:15,073 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 63 transitions, 813 flow [2021-06-10 15:06:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 15:06:15,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 15:06:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2021-06-10 15:06:15,074 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-06-10 15:06:15,074 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 168 transitions. [2021-06-10 15:06:15,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 168 transitions. [2021-06-10 15:06:15,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:15,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 168 transitions. [2021-06-10 15:06:15,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 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 15:06:15,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:15,075 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:15,075 INFO L185 Difference]: Start difference. First operand has 106 places, 48 transitions, 521 flow. Second operand 8 states and 168 transitions. [2021-06-10 15:06:15,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 63 transitions, 813 flow [2021-06-10 15:06:15,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 63 transitions, 627 flow, removed 35 selfloop flow, removed 25 redundant places. [2021-06-10 15:06:15,083 INFO L241 Difference]: Finished difference. Result has 76 places, 49 transitions, 457 flow [2021-06-10 15:06:15,083 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=457, PETRI_PLACES=76, PETRI_TRANSITIONS=49} [2021-06-10 15:06:15,084 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 49 predicate places. [2021-06-10 15:06:15,084 INFO L480 AbstractCegarLoop]: Abstraction has has 76 places, 49 transitions, 457 flow [2021-06-10 15:06:15,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:15,084 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:15,084 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:15,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-10 15:06:15,084 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:15,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:15,084 INFO L82 PathProgramCache]: Analyzing trace with hash 547516907, now seen corresponding path program 15 times [2021-06-10 15:06:15,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:15,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338107625] [2021-06-10 15:06:15,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:15,096 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:15,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,097 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,105 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,111 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,111 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,118 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,118 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,126 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:15,136 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:15,137 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:15,146 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,147 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:15,148 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 15:06:15,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338107625] [2021-06-10 15:06:15,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:15,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:15,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037340642] [2021-06-10 15:06:15,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:15,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:15,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:15,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:15,150 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:15,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 49 transitions, 457 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:15,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:15,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:15,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:15,301 INFO L129 PetriNetUnfolder]: 19/317 cut-off events. [2021-06-10 15:06:15,302 INFO L130 PetriNetUnfolder]: For 1837/1854 co-relation queries the response was YES. [2021-06-10 15:06:15,302 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 317 events. 19/317 cut-off events. For 1837/1854 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2565 event pairs, 4 based on Foata normal form. 13/317 useless extension candidates. Maximal degree in co-relation 1217. Up to 50 conditions per place. [2021-06-10 15:06:15,304 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 22 selfloop transitions, 18 changer transitions 4/61 dead transitions. [2021-06-10 15:06:15,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 61 transitions, 689 flow [2021-06-10 15:06:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 15:06:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 15:06:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2021-06-10 15:06:15,305 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7544642857142857 [2021-06-10 15:06:15,305 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 169 transitions. [2021-06-10 15:06:15,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 169 transitions. [2021-06-10 15:06:15,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:15,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 169 transitions. [2021-06-10 15:06:15,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 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 15:06:15,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:15,306 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:15,306 INFO L185 Difference]: Start difference. First operand has 76 places, 49 transitions, 457 flow. Second operand 8 states and 169 transitions. [2021-06-10 15:06:15,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 61 transitions, 689 flow [2021-06-10 15:06:15,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 61 transitions, 640 flow, removed 17 selfloop flow, removed 6 redundant places. [2021-06-10 15:06:15,312 INFO L241 Difference]: Finished difference. Result has 78 places, 52 transitions, 533 flow [2021-06-10 15:06:15,313 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=533, PETRI_PLACES=78, PETRI_TRANSITIONS=52} [2021-06-10 15:06:15,313 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 51 predicate places. [2021-06-10 15:06:15,313 INFO L480 AbstractCegarLoop]: Abstraction has has 78 places, 52 transitions, 533 flow [2021-06-10 15:06:15,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:15,313 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:15,313 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:15,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-10 15:06:15,313 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:15,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:15,314 INFO L82 PathProgramCache]: Analyzing trace with hash -345847091, now seen corresponding path program 16 times [2021-06-10 15:06:15,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:15,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356853120] [2021-06-10 15:06:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:15,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,322 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:15,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,333 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,333 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,340 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,348 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:15,358 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:15,358 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:15,368 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:15,369 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 15:06:15,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356853120] [2021-06-10 15:06:15,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:15,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:15,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104159442] [2021-06-10 15:06:15,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:15,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:15,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:15,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:15,370 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:15,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 52 transitions, 533 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:15,371 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:15,371 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:15,371 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:15,512 INFO L129 PetriNetUnfolder]: 19/277 cut-off events. [2021-06-10 15:06:15,512 INFO L130 PetriNetUnfolder]: For 1867/1885 co-relation queries the response was YES. [2021-06-10 15:06:15,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 277 events. 19/277 cut-off events. For 1867/1885 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2124 event pairs, 4 based on Foata normal form. 15/280 useless extension candidates. Maximal degree in co-relation 1122. Up to 46 conditions per place. [2021-06-10 15:06:15,514 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 15 selfloop transitions, 7 changer transitions 19/58 dead transitions. [2021-06-10 15:06:15,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 58 transitions, 693 flow [2021-06-10 15:06:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 15:06:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 15:06:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2021-06-10 15:06:15,515 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7455357142857143 [2021-06-10 15:06:15,515 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 167 transitions. [2021-06-10 15:06:15,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 167 transitions. [2021-06-10 15:06:15,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:15,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 167 transitions. [2021-06-10 15:06:15,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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 15:06:15,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:15,516 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:15,516 INFO L185 Difference]: Start difference. First operand has 78 places, 52 transitions, 533 flow. Second operand 8 states and 167 transitions. [2021-06-10 15:06:15,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 58 transitions, 693 flow [2021-06-10 15:06:15,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 58 transitions, 662 flow, removed 9 selfloop flow, removed 4 redundant places. [2021-06-10 15:06:15,523 INFO L241 Difference]: Finished difference. Result has 81 places, 38 transitions, 338 flow [2021-06-10 15:06:15,523 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=81, PETRI_TRANSITIONS=38} [2021-06-10 15:06:15,524 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 54 predicate places. [2021-06-10 15:06:15,524 INFO L480 AbstractCegarLoop]: Abstraction has has 81 places, 38 transitions, 338 flow [2021-06-10 15:06:15,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:15,524 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:15,524 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:15,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-10 15:06:15,524 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:15,525 INFO L82 PathProgramCache]: Analyzing trace with hash -124734963, now seen corresponding path program 17 times [2021-06-10 15:06:15,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:15,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72798936] [2021-06-10 15:06:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:15,532 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,533 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:15,533 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,534 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,538 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,538 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,544 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,544 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,551 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,556 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:15,564 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:15,574 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:15,575 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:15,584 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,585 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:15,585 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 15:06:15,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72798936] [2021-06-10 15:06:15,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:15,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:15,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457024930] [2021-06-10 15:06:15,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:15,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:15,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:15,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:15,586 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:15,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 38 transitions, 338 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:15,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:15,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:15,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:15,710 INFO L129 PetriNetUnfolder]: 12/176 cut-off events. [2021-06-10 15:06:15,710 INFO L130 PetriNetUnfolder]: For 1160/1165 co-relation queries the response was YES. [2021-06-10 15:06:15,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 176 events. 12/176 cut-off events. For 1160/1165 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1115 event pairs, 0 based on Foata normal form. 6/174 useless extension candidates. Maximal degree in co-relation 697. Up to 30 conditions per place. [2021-06-10 15:06:15,712 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 13 selfloop transitions, 7 changer transitions 7/44 dead transitions. [2021-06-10 15:06:15,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 44 transitions, 494 flow [2021-06-10 15:06:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 15:06:15,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 15:06:15,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2021-06-10 15:06:15,713 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7276785714285714 [2021-06-10 15:06:15,713 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 163 transitions. [2021-06-10 15:06:15,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 163 transitions. [2021-06-10 15:06:15,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:15,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 163 transitions. [2021-06-10 15:06:15,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 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 15:06:15,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:15,714 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:15,714 INFO L185 Difference]: Start difference. First operand has 81 places, 38 transitions, 338 flow. Second operand 8 states and 163 transitions. [2021-06-10 15:06:15,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 44 transitions, 494 flow [2021-06-10 15:06:15,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 44 transitions, 416 flow, removed 19 selfloop flow, removed 13 redundant places. [2021-06-10 15:06:15,718 INFO L241 Difference]: Finished difference. Result has 72 places, 36 transitions, 269 flow [2021-06-10 15:06:15,719 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=269, PETRI_PLACES=72, PETRI_TRANSITIONS=36} [2021-06-10 15:06:15,719 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 45 predicate places. [2021-06-10 15:06:15,719 INFO L480 AbstractCegarLoop]: Abstraction has has 72 places, 36 transitions, 269 flow [2021-06-10 15:06:15,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:15,719 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:15,719 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:15,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-10 15:06:15,719 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:15,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:15,720 INFO L82 PathProgramCache]: Analyzing trace with hash -521673497, now seen corresponding path program 18 times [2021-06-10 15:06:15,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:15,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804606476] [2021-06-10 15:06:15,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:15,728 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:15,729 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,730 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,737 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,737 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,743 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,755 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,762 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,763 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:15,773 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:15,774 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:15,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:15,784 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 15:06:15,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804606476] [2021-06-10 15:06:15,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:15,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:15,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134487983] [2021-06-10 15:06:15,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:15,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:15,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:15,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:15,787 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:15,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 36 transitions, 269 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:15,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:15,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:15,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:15,907 INFO L129 PetriNetUnfolder]: 10/140 cut-off events. [2021-06-10 15:06:15,907 INFO L130 PetriNetUnfolder]: For 683/688 co-relation queries the response was YES. [2021-06-10 15:06:15,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 140 events. 10/140 cut-off events. For 683/688 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 808 event pairs, 4 based on Foata normal form. 7/141 useless extension candidates. Maximal degree in co-relation 508. Up to 31 conditions per place. [2021-06-10 15:06:15,908 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 7 selfloop transitions, 4 changer transitions 10/38 dead transitions. [2021-06-10 15:06:15,908 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 38 transitions, 338 flow [2021-06-10 15:06:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 15:06:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 15:06:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2021-06-10 15:06:15,909 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7232142857142857 [2021-06-10 15:06:15,909 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 162 transitions. [2021-06-10 15:06:15,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 162 transitions. [2021-06-10 15:06:15,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:15,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 162 transitions. [2021-06-10 15:06:15,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 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 15:06:15,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:15,911 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:15,911 INFO L185 Difference]: Start difference. First operand has 72 places, 36 transitions, 269 flow. Second operand 8 states and 162 transitions. [2021-06-10 15:06:15,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 38 transitions, 338 flow [2021-06-10 15:06:15,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 38 transitions, 317 flow, removed 4 selfloop flow, removed 7 redundant places. [2021-06-10 15:06:15,914 INFO L241 Difference]: Finished difference. Result has 70 places, 28 transitions, 150 flow [2021-06-10 15:06:15,914 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=150, PETRI_PLACES=70, PETRI_TRANSITIONS=28} [2021-06-10 15:06:15,914 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 43 predicate places. [2021-06-10 15:06:15,914 INFO L480 AbstractCegarLoop]: Abstraction has has 70 places, 28 transitions, 150 flow [2021-06-10 15:06:15,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:15,914 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:15,914 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:15,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-10 15:06:15,915 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:15,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:15,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1214558623, now seen corresponding path program 19 times [2021-06-10 15:06:15,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:15,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297031910] [2021-06-10 15:06:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:15,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:15,925 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,930 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,935 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:15,951 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:15,961 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:15,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:15,970 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:15,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:15,971 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 15:06:15,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297031910] [2021-06-10 15:06:15,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:15,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:15,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022423486] [2021-06-10 15:06:15,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:15,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:15,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:15,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:15,972 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:15,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 28 transitions, 150 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:15,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:15,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:15,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:16,076 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2021-06-10 15:06:16,076 INFO L130 PetriNetUnfolder]: For 319/323 co-relation queries the response was YES. [2021-06-10 15:06:16,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 89 events. 3/89 cut-off events. For 319/323 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 407 event pairs, 0 based on Foata normal form. 6/92 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2021-06-10 15:06:16,077 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 4 selfloop transitions, 7 changer transitions 2/30 dead transitions. [2021-06-10 15:06:16,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 30 transitions, 204 flow [2021-06-10 15:06:16,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 15:06:16,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 15:06:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2021-06-10 15:06:16,078 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7053571428571429 [2021-06-10 15:06:16,078 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 158 transitions. [2021-06-10 15:06:16,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 158 transitions. [2021-06-10 15:06:16,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:16,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 158 transitions. [2021-06-10 15:06:16,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 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 15:06:16,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:16,079 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:16,079 INFO L185 Difference]: Start difference. First operand has 70 places, 28 transitions, 150 flow. Second operand 8 states and 158 transitions. [2021-06-10 15:06:16,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 30 transitions, 204 flow [2021-06-10 15:06:16,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 30 transitions, 156 flow, removed 15 selfloop flow, removed 15 redundant places. [2021-06-10 15:06:16,081 INFO L241 Difference]: Finished difference. Result has 54 places, 28 transitions, 135 flow [2021-06-10 15:06:16,081 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=135, PETRI_PLACES=54, PETRI_TRANSITIONS=28} [2021-06-10 15:06:16,081 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 27 predicate places. [2021-06-10 15:06:16,081 INFO L480 AbstractCegarLoop]: Abstraction has has 54 places, 28 transitions, 135 flow [2021-06-10 15:06:16,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:16,081 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:06:16,081 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:06:16,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-10 15:06:16,081 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:06:16,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:06:16,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2107922621, now seen corresponding path program 20 times [2021-06-10 15:06:16,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:06:16,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406598009] [2021-06-10 15:06:16,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:06:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:06:16,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:16,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:16,098 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:16,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:16,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:16,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:16,108 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:16,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:16,115 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:16,120 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 15:06:16,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:16,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 15:06:16,141 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-10 15:06:16,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 15:06:16,150 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:06:16,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:06:16,151 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 15:06:16,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406598009] [2021-06-10 15:06:16,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:06:16,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 15:06:16,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750715203] [2021-06-10 15:06:16,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 15:06:16,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:06:16,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 15:06:16,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-10 15:06:16,152 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-10 15:06:16,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 28 transitions, 135 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:16,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:06:16,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-10 15:06:16,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:06:16,251 INFO L129 PetriNetUnfolder]: 3/69 cut-off events. [2021-06-10 15:06:16,251 INFO L130 PetriNetUnfolder]: For 100/103 co-relation queries the response was YES. [2021-06-10 15:06:16,251 INFO L84 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 69 events. 3/69 cut-off events. For 100/103 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 273 event pairs, 0 based on Foata normal form. 4/70 useless extension candidates. Maximal degree in co-relation 195. Up to 10 conditions per place. [2021-06-10 15:06:16,252 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2021-06-10 15:06:16,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 28 transitions, 169 flow [2021-06-10 15:06:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 15:06:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 15:06:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2021-06-10 15:06:16,252 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7008928571428571 [2021-06-10 15:06:16,252 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 157 transitions. [2021-06-10 15:06:16,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 157 transitions. [2021-06-10 15:06:16,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:06:16,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 157 transitions. [2021-06-10 15:06:16,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 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 15:06:16,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:16,254 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 15:06:16,254 INFO L185 Difference]: Start difference. First operand has 54 places, 28 transitions, 135 flow. Second operand 8 states and 157 transitions. [2021-06-10 15:06:16,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 28 transitions, 169 flow [2021-06-10 15:06:16,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 28 transitions, 155 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-06-10 15:06:16,255 INFO L241 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2021-06-10 15:06:16,255 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2021-06-10 15:06:16,255 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2021-06-10 15:06:16,255 INFO L480 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2021-06-10 15:06:16,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 15:06:16,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-10 15:06:16,260 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 03:06:16 BasicIcfg [2021-06-10 15:06:16,260 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 15:06:16,260 INFO L168 Benchmark]: Toolchain (without parser) took 7162.02 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 338.7 MB in the beginning and 380.9 MB in the end (delta: -42.2 MB). Peak memory consumption was 30.4 MB. Max. memory is 16.0 GB. [2021-06-10 15:06:16,260 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.95 ms. Allocated memory is still 358.6 MB. Free memory was 339.8 MB in the beginning and 339.7 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 15:06:16,261 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.31 ms. Allocated memory is still 358.6 MB. Free memory was 338.6 MB in the beginning and 337.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 15:06:16,261 INFO L168 Benchmark]: Boogie Preprocessor took 10.65 ms. Allocated memory is still 358.6 MB. Free memory was 337.2 MB in the beginning and 336.3 MB in the end (delta: 891.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 15:06:16,261 INFO L168 Benchmark]: RCFGBuilder took 168.69 ms. Allocated memory is still 358.6 MB. Free memory was 336.2 MB in the beginning and 326.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-10 15:06:16,261 INFO L168 Benchmark]: TraceAbstraction took 6957.04 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 325.5 MB in the beginning and 380.9 MB in the end (delta: -55.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. [2021-06-10 15:06:16,261 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 0.95 ms. Allocated memory is still 358.6 MB. Free memory was 339.8 MB in the beginning and 339.7 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.31 ms. Allocated memory is still 358.6 MB. Free memory was 338.6 MB in the beginning and 337.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.65 ms. Allocated memory is still 358.6 MB. Free memory was 337.2 MB in the beginning and 336.3 MB in the end (delta: 891.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 168.69 ms. Allocated memory is still 358.6 MB. Free memory was 336.2 MB in the beginning and 326.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 6957.04 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 325.5 MB in the beginning and 380.9 MB in the end (delta: -55.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 69]: 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, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 22.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 6881.7ms, OverallIterations: 24, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 4733.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 315 SDtfs, 569 SDslu, 736 SDs, 0 SdLazy, 1387 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 765.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 311 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3092.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1474occurred in iteration=13, InterpolantAutomatonStates: 203, 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: 27.4ms SsaConstructionTime, 113.0ms SatisfiabilityAnalysisTime, 1721.5ms InterpolantComputationTime, 429 NumberOfCodeBlocks, 429 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 405 ConstructedInterpolants, 0 QuantifiedInterpolants, 2735 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 24 InterpolantComputations, 24 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...