/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-12 00:33:13,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-12 00:33:13,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-12 00:33:13,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-12 00:33:13,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-12 00:33:13,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-12 00:33:13,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-12 00:33:13,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-12 00:33:13,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-12 00:33:13,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-12 00:33:13,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-12 00:33:13,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-12 00:33:13,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-12 00:33:13,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-12 00:33:13,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-12 00:33:13,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-12 00:33:13,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-12 00:33:13,580 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-SemanticLbe.epf [2021-03-12 00:33:13,613 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-12 00:33:13,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-12 00:33:13,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-12 00:33:13,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-12 00:33:13,617 INFO L138 SettingsManager]: * Use SBE=true [2021-03-12 00:33:13,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-12 00:33:13,618 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-12 00:33:13,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-12 00:33:13,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-12 00:33:13,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-12 00:33:13,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-12 00:33:13,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-12 00:33:13,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-12 00:33:13,620 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-12 00:33:13,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-12 00:33:13,620 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-12 00:33:13,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-12 00:33:13,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-12 00:33:13,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-12 00:33:13,621 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-12 00:33:13,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-12 00:33:13,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-12 00:33:13,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-12 00:33:13,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-12 00:33:13,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-12 00:33:13,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-12 00:33:13,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-12 00:33:13,622 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-12 00:33:13,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-12 00:33:13,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-12 00:33:13,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-12 00:33:13,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-12 00:33:13,937 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-12 00:33:13,939 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-12 00:33:13,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl [2021-03-12 00:33:13,940 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl' [2021-03-12 00:33:13,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-12 00:33:13,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-12 00:33:13,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-12 00:33:13,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-12 00:33:13,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-12 00:33:13,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:13" (1/1) ... [2021-03-12 00:33:13,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:13" (1/1) ... [2021-03-12 00:33:14,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-12 00:33:14,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-12 00:33:14,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-12 00:33:14,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-12 00:33:14,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:13" (1/1) ... [2021-03-12 00:33:14,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:13" (1/1) ... [2021-03-12 00:33:14,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:13" (1/1) ... [2021-03-12 00:33:14,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:13" (1/1) ... [2021-03-12 00:33:14,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:13" (1/1) ... [2021-03-12 00:33:14,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:13" (1/1) ... [2021-03-12 00:33:14,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:13" (1/1) ... [2021-03-12 00:33:14,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-12 00:33:14,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-12 00:33:14,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-12 00:33:14,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-12 00:33:14,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:13" (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 [2021-03-12 00:33:14,064 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-12 00:33:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-12 00:33:14,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-12 00:33:14,065 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-12 00:33:14,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-12 00:33:14,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-12 00:33:14,065 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-12 00:33:14,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-12 00:33:14,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-12 00:33:14,065 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-12 00:33:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-12 00:33:14,066 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-12 00:33:14,066 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-12 00:33:14,221 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-12 00:33:14,221 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-12 00:33:14,222 INFO L202 PluginConnector]: Adding new model ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.03 12:33:14 BoogieIcfgContainer [2021-03-12 00:33:14,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-12 00:33:14,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-12 00:33:14,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-12 00:33:14,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-12 00:33:14,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:13" (1/2) ... [2021-03-12 00:33:14,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a2800f and model type ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.03 12:33:14, skipping insertion in model container [2021-03-12 00:33:14,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.03 12:33:14" (2/2) ... [2021-03-12 00:33:14,228 INFO L111 eAbstractionObserver]: Analyzing ICFG ticket-3.wvr.bpl [2021-03-12 00:33:14,232 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-12 00:33:14,235 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-12 00:33:14,235 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-12 00:33:14,288 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-12 00:33:14,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-12 00:33:14,318 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-12 00:33:14,319 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-12 00:33:14,319 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-12 00:33:14,319 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-12 00:33:14,319 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-12 00:33:14,319 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-12 00:33:14,319 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-12 00:33:14,319 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-12 00:33:14,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 40 places, 30 transitions, 84 flow [2021-03-12 00:33:14,359 INFO L129 PetriNetUnfolder]: 0/27 cut-off events. [2021-03-12 00:33:14,360 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-12 00:33:14,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 27 events. 0/27 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-12 00:33:14,361 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 30 transitions, 84 flow [2021-03-12 00:33:14,365 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 25 transitions, 68 flow [2021-03-12 00:33:14,368 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-12 00:33:14,380 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 35 places, 25 transitions, 68 flow [2021-03-12 00:33:14,382 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 35 places, 25 transitions, 68 flow [2021-03-12 00:33:14,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 35 places, 25 transitions, 68 flow [2021-03-12 00:33:14,394 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-03-12 00:33:14,394 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-12 00:33:14,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 25 events. 0/25 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-12 00:33:14,396 INFO L116 LiptonReduction]: Number of co-enabled transitions 234 [2021-03-12 00:33:15,185 INFO L131 LiptonReduction]: Checked pairs total: 466 [2021-03-12 00:33:15,185 INFO L133 LiptonReduction]: Total number of compositions: 10 [2021-03-12 00:33:15,187 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 822 [2021-03-12 00:33:15,211 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-12 00:33:15,211 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-12 00:33:15,211 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:15,212 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:15,212 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:15,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1675982494, now seen corresponding path program 1 times [2021-03-12 00:33:15,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:15,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564247049] [2021-03-12 00:33:15,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:15,382 INFO L142 QuantifierPusher]: treesize reduction 14, result has 41.7 percent of original size [2021-03-12 00:33:15,384 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-12 00:33:15,395 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,396 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:15,401 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:15,403 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-03-12 00:33:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:15,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564247049] [2021-03-12 00:33:15,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:15,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-12 00:33:15,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984439376] [2021-03-12 00:33:15,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-12 00:33:15,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:15,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-12 00:33:15,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-12 00:33:15,442 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 40 [2021-03-12 00:33:15,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 15 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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) [2021-03-12 00:33:15,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:15,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 40 [2021-03-12 00:33:15,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:15,506 INFO L129 PetriNetUnfolder]: 43/107 cut-off events. [2021-03-12 00:33:15,506 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-03-12 00:33:15,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 107 events. 43/107 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 391 event pairs, 12 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 200. Up to 54 conditions per place. [2021-03-12 00:33:15,512 INFO L132 encePairwiseOnDemand]: 31/40 looper letters, 13 selfloop transitions, 7 changer transitions 1/27 dead transitions. [2021-03-12 00:33:15,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 114 flow [2021-03-12 00:33:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-12 00:33:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-12 00:33:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2021-03-12 00:33:15,522 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.61 [2021-03-12 00:33:15,523 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 122 transitions. [2021-03-12 00:33:15,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 122 transitions. [2021-03-12 00:33:15,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:15,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 122 transitions. [2021-03-12 00:33:15,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2021-03-12 00:33:15,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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) [2021-03-12 00:33:15,536 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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) [2021-03-12 00:33:15,537 INFO L185 Difference]: Start difference. First operand has 25 places, 15 transitions, 48 flow. Second operand 5 states and 122 transitions. [2021-03-12 00:33:15,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 114 flow [2021-03-12 00:33:15,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 27 transitions, 102 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-12 00:33:15,542 INFO L241 Difference]: Finished difference. Result has 26 places, 20 transitions, 85 flow [2021-03-12 00:33:15,544 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=85, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2021-03-12 00:33:15,544 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2021-03-12 00:33:15,544 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 85 flow [2021-03-12 00:33:15,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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) [2021-03-12 00:33:15,545 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:15,545 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:15,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-12 00:33:15,545 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:15,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:15,546 INFO L82 PathProgramCache]: Analyzing trace with hash 934081336, now seen corresponding path program 2 times [2021-03-12 00:33:15,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:15,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058942867] [2021-03-12 00:33:15,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:15,593 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,593 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:15,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,598 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:15,602 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,602 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:15,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,608 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:15,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058942867] [2021-03-12 00:33:15,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:15,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-12 00:33:15,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730836319] [2021-03-12 00:33:15,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-12 00:33:15,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:15,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-12 00:33:15,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-12 00:33:15,616 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 40 [2021-03-12 00:33:15,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 20 transitions, 85 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:15,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:15,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 40 [2021-03-12 00:33:15,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:15,689 INFO L129 PetriNetUnfolder]: 34/89 cut-off events. [2021-03-12 00:33:15,690 INFO L130 PetriNetUnfolder]: For 55/61 co-relation queries the response was YES. [2021-03-12 00:33:15,691 INFO L84 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 89 events. 34/89 cut-off events. For 55/61 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 295 event pairs, 4 based on Foata normal form. 7/95 useless extension candidates. Maximal degree in co-relation 246. Up to 51 conditions per place. [2021-03-12 00:33:15,692 INFO L132 encePairwiseOnDemand]: 34/40 looper letters, 15 selfloop transitions, 11 changer transitions 0/33 dead transitions. [2021-03-12 00:33:15,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 33 transitions, 196 flow [2021-03-12 00:33:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-12 00:33:15,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-12 00:33:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2021-03-12 00:33:15,697 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.61 [2021-03-12 00:33:15,700 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 122 transitions. [2021-03-12 00:33:15,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 122 transitions. [2021-03-12 00:33:15,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:15,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 122 transitions. [2021-03-12 00:33:15,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2021-03-12 00:33:15,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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) [2021-03-12 00:33:15,703 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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) [2021-03-12 00:33:15,703 INFO L185 Difference]: Start difference. First operand has 26 places, 20 transitions, 85 flow. Second operand 5 states and 122 transitions. [2021-03-12 00:33:15,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 33 transitions, 196 flow [2021-03-12 00:33:15,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 33 transitions, 176 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-03-12 00:33:15,705 INFO L241 Difference]: Finished difference. Result has 29 places, 27 transitions, 147 flow [2021-03-12 00:33:15,705 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2021-03-12 00:33:15,707 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2021-03-12 00:33:15,707 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 147 flow [2021-03-12 00:33:15,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:15,707 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:15,707 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:15,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-12 00:33:15,707 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:15,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:15,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1681708662, now seen corresponding path program 3 times [2021-03-12 00:33:15,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:15,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936030227] [2021-03-12 00:33:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:15,742 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:15,746 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,746 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:15,749 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,750 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:15,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,755 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:15,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936030227] [2021-03-12 00:33:15,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:15,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-12 00:33:15,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107666849] [2021-03-12 00:33:15,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-12 00:33:15,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:15,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-12 00:33:15,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-12 00:33:15,758 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 40 [2021-03-12 00:33:15,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:15,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:15,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 40 [2021-03-12 00:33:15,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:15,813 INFO L129 PetriNetUnfolder]: 31/90 cut-off events. [2021-03-12 00:33:15,813 INFO L130 PetriNetUnfolder]: For 111/117 co-relation queries the response was YES. [2021-03-12 00:33:15,813 INFO L84 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 90 events. 31/90 cut-off events. For 111/117 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 307 event pairs, 5 based on Foata normal form. 9/98 useless extension candidates. Maximal degree in co-relation 289. Up to 48 conditions per place. [2021-03-12 00:33:15,814 INFO L132 encePairwiseOnDemand]: 34/40 looper letters, 14 selfloop transitions, 12 changer transitions 2/35 dead transitions. [2021-03-12 00:33:15,814 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 35 transitions, 245 flow [2021-03-12 00:33:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-12 00:33:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-12 00:33:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2021-03-12 00:33:15,815 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.61 [2021-03-12 00:33:15,815 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 122 transitions. [2021-03-12 00:33:15,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 122 transitions. [2021-03-12 00:33:15,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:15,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 122 transitions. [2021-03-12 00:33:15,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2021-03-12 00:33:15,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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) [2021-03-12 00:33:15,817 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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) [2021-03-12 00:33:15,817 INFO L185 Difference]: Start difference. First operand has 29 places, 27 transitions, 147 flow. Second operand 5 states and 122 transitions. [2021-03-12 00:33:15,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 35 transitions, 245 flow [2021-03-12 00:33:15,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-12 00:33:15,820 INFO L241 Difference]: Finished difference. Result has 33 places, 29 transitions, 190 flow [2021-03-12 00:33:15,820 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2021-03-12 00:33:15,820 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 8 predicate places. [2021-03-12 00:33:15,820 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 190 flow [2021-03-12 00:33:15,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:15,821 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:15,821 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:15,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-12 00:33:15,821 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:15,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:15,821 INFO L82 PathProgramCache]: Analyzing trace with hash 916826208, now seen corresponding path program 4 times [2021-03-12 00:33:15,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:15,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775026974] [2021-03-12 00:33:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:15,837 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:15,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:15,843 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,844 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:15,848 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:15,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775026974] [2021-03-12 00:33:15,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:15,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-12 00:33:15,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250573350] [2021-03-12 00:33:15,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-12 00:33:15,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:15,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-12 00:33:15,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-12 00:33:15,851 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 40 [2021-03-12 00:33:15,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:15,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:15,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 40 [2021-03-12 00:33:15,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:15,894 INFO L129 PetriNetUnfolder]: 16/49 cut-off events. [2021-03-12 00:33:15,894 INFO L130 PetriNetUnfolder]: For 82/86 co-relation queries the response was YES. [2021-03-12 00:33:15,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 49 events. 16/49 cut-off events. For 82/86 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 109 event pairs, 3 based on Foata normal form. 8/57 useless extension candidates. Maximal degree in co-relation 180. Up to 32 conditions per place. [2021-03-12 00:33:15,895 INFO L132 encePairwiseOnDemand]: 33/40 looper letters, 11 selfloop transitions, 12 changer transitions 2/32 dead transitions. [2021-03-12 00:33:15,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 259 flow [2021-03-12 00:33:15,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-12 00:33:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-12 00:33:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2021-03-12 00:33:15,897 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6 [2021-03-12 00:33:15,897 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 120 transitions. [2021-03-12 00:33:15,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 120 transitions. [2021-03-12 00:33:15,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:15,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 120 transitions. [2021-03-12 00:33:15,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 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) [2021-03-12 00:33:15,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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) [2021-03-12 00:33:15,899 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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) [2021-03-12 00:33:15,899 INFO L185 Difference]: Start difference. First operand has 33 places, 29 transitions, 190 flow. Second operand 5 states and 120 transitions. [2021-03-12 00:33:15,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 259 flow [2021-03-12 00:33:15,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 211 flow, removed 10 selfloop flow, removed 5 redundant places. [2021-03-12 00:33:15,901 INFO L241 Difference]: Finished difference. Result has 34 places, 28 transitions, 174 flow [2021-03-12 00:33:15,901 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2021-03-12 00:33:15,902 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 9 predicate places. [2021-03-12 00:33:15,902 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 174 flow [2021-03-12 00:33:15,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:15,902 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:15,902 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:15,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-12 00:33:15,902 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:15,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:15,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1951271190, now seen corresponding path program 5 times [2021-03-12 00:33:15,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:15,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935979981] [2021-03-12 00:33:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:15,959 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:15,963 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:15,969 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:15,976 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,976 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:15,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:15,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:15,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:15,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935979981] [2021-03-12 00:33:15,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:15,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:33:15,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698170977] [2021-03-12 00:33:15,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:33:15,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:15,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:33:15,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:33:15,985 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 40 [2021-03-12 00:33:15,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 174 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 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) [2021-03-12 00:33:15,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:15,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 40 [2021-03-12 00:33:15,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:16,046 INFO L129 PetriNetUnfolder]: 13/56 cut-off events. [2021-03-12 00:33:16,047 INFO L130 PetriNetUnfolder]: For 104/108 co-relation queries the response was YES. [2021-03-12 00:33:16,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 56 events. 13/56 cut-off events. For 104/108 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 175 event pairs, 0 based on Foata normal form. 6/62 useless extension candidates. Maximal degree in co-relation 185. Up to 27 conditions per place. [2021-03-12 00:33:16,049 INFO L132 encePairwiseOnDemand]: 32/40 looper letters, 9 selfloop transitions, 20 changer transitions 1/37 dead transitions. [2021-03-12 00:33:16,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 285 flow [2021-03-12 00:33:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:33:16,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:33:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2021-03-12 00:33:16,051 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2021-03-12 00:33:16,051 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 142 transitions. [2021-03-12 00:33:16,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 142 transitions. [2021-03-12 00:33:16,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:16,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 142 transitions. [2021-03-12 00:33:16,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 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) [2021-03-12 00:33:16,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 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) [2021-03-12 00:33:16,053 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 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) [2021-03-12 00:33:16,053 INFO L185 Difference]: Start difference. First operand has 34 places, 28 transitions, 174 flow. Second operand 6 states and 142 transitions. [2021-03-12 00:33:16,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 285 flow [2021-03-12 00:33:16,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 260 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-12 00:33:16,056 INFO L241 Difference]: Finished difference. Result has 37 places, 33 transitions, 243 flow [2021-03-12 00:33:16,056 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2021-03-12 00:33:16,056 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 12 predicate places. [2021-03-12 00:33:16,056 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 243 flow [2021-03-12 00:33:16,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 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) [2021-03-12 00:33:16,056 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:16,056 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:16,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-12 00:33:16,057 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:16,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1837612556, now seen corresponding path program 6 times [2021-03-12 00:33:16,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:16,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282222905] [2021-03-12 00:33:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:16,093 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:16,096 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,100 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,100 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,109 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,114 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,114 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:16,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282222905] [2021-03-12 00:33:16,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:16,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:33:16,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180660259] [2021-03-12 00:33:16,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:33:16,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:16,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:33:16,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:33:16,118 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 40 [2021-03-12 00:33:16,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 243 flow. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 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) [2021-03-12 00:33:16,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:16,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 40 [2021-03-12 00:33:16,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:16,203 INFO L129 PetriNetUnfolder]: 9/61 cut-off events. [2021-03-12 00:33:16,203 INFO L130 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2021-03-12 00:33:16,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 61 events. 9/61 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 238 event pairs, 2 based on Foata normal form. 4/65 useless extension candidates. Maximal degree in co-relation 64. Up to 25 conditions per place. [2021-03-12 00:33:16,205 INFO L132 encePairwiseOnDemand]: 32/40 looper letters, 12 selfloop transitions, 17 changer transitions 10/46 dead transitions. [2021-03-12 00:33:16,205 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 430 flow [2021-03-12 00:33:16,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:33:16,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:33:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2021-03-12 00:33:16,207 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.590625 [2021-03-12 00:33:16,207 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 189 transitions. [2021-03-12 00:33:16,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 189 transitions. [2021-03-12 00:33:16,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:16,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 189 transitions. [2021-03-12 00:33:16,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 23.625) internal successors, (189), 8 states have internal predecessors, (189), 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) [2021-03-12 00:33:16,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 40.0) internal successors, (360), 9 states have internal predecessors, (360), 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) [2021-03-12 00:33:16,208 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 40.0) internal successors, (360), 9 states have internal predecessors, (360), 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) [2021-03-12 00:33:16,208 INFO L185 Difference]: Start difference. First operand has 37 places, 33 transitions, 243 flow. Second operand 8 states and 189 transitions. [2021-03-12 00:33:16,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 430 flow [2021-03-12 00:33:16,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 46 transitions, 366 flow, removed 16 selfloop flow, removed 5 redundant places. [2021-03-12 00:33:16,212 INFO L241 Difference]: Finished difference. Result has 43 places, 34 transitions, 282 flow [2021-03-12 00:33:16,212 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=282, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2021-03-12 00:33:16,212 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 18 predicate places. [2021-03-12 00:33:16,212 INFO L480 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 282 flow [2021-03-12 00:33:16,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 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) [2021-03-12 00:33:16,213 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:16,213 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:16,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-12 00:33:16,213 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:16,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:16,213 INFO L82 PathProgramCache]: Analyzing trace with hash -78611196, now seen corresponding path program 7 times [2021-03-12 00:33:16,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:16,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550311022] [2021-03-12 00:33:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:16,245 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:16,248 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,252 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,255 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,255 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,261 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,262 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,268 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:16,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550311022] [2021-03-12 00:33:16,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:16,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:33:16,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660525340] [2021-03-12 00:33:16,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:33:16,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:16,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:33:16,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:33:16,271 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 40 [2021-03-12 00:33:16,272 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 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) [2021-03-12 00:33:16,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:16,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 40 [2021-03-12 00:33:16,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:16,323 INFO L129 PetriNetUnfolder]: 8/48 cut-off events. [2021-03-12 00:33:16,323 INFO L130 PetriNetUnfolder]: For 185/190 co-relation queries the response was YES. [2021-03-12 00:33:16,323 INFO L84 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 48 events. 8/48 cut-off events. For 185/190 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 138 event pairs, 2 based on Foata normal form. 6/54 useless extension candidates. Maximal degree in co-relation 183. Up to 20 conditions per place. [2021-03-12 00:33:16,324 INFO L132 encePairwiseOnDemand]: 33/40 looper letters, 11 selfloop transitions, 15 changer transitions 3/36 dead transitions. [2021-03-12 00:33:16,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 360 flow [2021-03-12 00:33:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:33:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:33:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2021-03-12 00:33:16,325 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2021-03-12 00:33:16,325 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 145 transitions. [2021-03-12 00:33:16,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 145 transitions. [2021-03-12 00:33:16,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:16,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 145 transitions. [2021-03-12 00:33:16,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 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) [2021-03-12 00:33:16,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 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) [2021-03-12 00:33:16,326 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 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) [2021-03-12 00:33:16,326 INFO L185 Difference]: Start difference. First operand has 43 places, 34 transitions, 282 flow. Second operand 6 states and 145 transitions. [2021-03-12 00:33:16,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 360 flow [2021-03-12 00:33:16,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 321 flow, removed 10 selfloop flow, removed 5 redundant places. [2021-03-12 00:33:16,329 INFO L241 Difference]: Finished difference. Result has 41 places, 31 transitions, 255 flow [2021-03-12 00:33:16,329 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=255, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2021-03-12 00:33:16,329 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 16 predicate places. [2021-03-12 00:33:16,330 INFO L480 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 255 flow [2021-03-12 00:33:16,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 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) [2021-03-12 00:33:16,330 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:16,330 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:16,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-12 00:33:16,330 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:16,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:16,330 INFO L82 PathProgramCache]: Analyzing trace with hash -940454168, now seen corresponding path program 8 times [2021-03-12 00:33:16,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:16,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130440938] [2021-03-12 00:33:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:16,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:16,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,361 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,367 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,368 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:16,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130440938] [2021-03-12 00:33:16,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:16,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:33:16,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227613831] [2021-03-12 00:33:16,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:33:16,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:16,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:33:16,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:33:16,372 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 40 [2021-03-12 00:33:16,372 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 255 flow. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 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) [2021-03-12 00:33:16,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:16,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 40 [2021-03-12 00:33:16,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:16,429 INFO L129 PetriNetUnfolder]: 6/42 cut-off events. [2021-03-12 00:33:16,429 INFO L130 PetriNetUnfolder]: For 126/129 co-relation queries the response was YES. [2021-03-12 00:33:16,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 42 events. 6/42 cut-off events. For 126/129 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 106 event pairs, 2 based on Foata normal form. 4/46 useless extension candidates. Maximal degree in co-relation 148. Up to 19 conditions per place. [2021-03-12 00:33:16,430 INFO L132 encePairwiseOnDemand]: 33/40 looper letters, 11 selfloop transitions, 12 changer transitions 3/33 dead transitions. [2021-03-12 00:33:16,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 316 flow [2021-03-12 00:33:16,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 00:33:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-12 00:33:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2021-03-12 00:33:16,431 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2021-03-12 00:33:16,431 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 164 transitions. [2021-03-12 00:33:16,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 164 transitions. [2021-03-12 00:33:16,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:16,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 164 transitions. [2021-03-12 00:33:16,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 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) [2021-03-12 00:33:16,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 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) [2021-03-12 00:33:16,432 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 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) [2021-03-12 00:33:16,432 INFO L185 Difference]: Start difference. First operand has 41 places, 31 transitions, 255 flow. Second operand 7 states and 164 transitions. [2021-03-12 00:33:16,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 316 flow [2021-03-12 00:33:16,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 33 transitions, 292 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-03-12 00:33:16,435 INFO L241 Difference]: Finished difference. Result has 43 places, 28 transitions, 226 flow [2021-03-12 00:33:16,435 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=226, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2021-03-12 00:33:16,435 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 18 predicate places. [2021-03-12 00:33:16,435 INFO L480 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 226 flow [2021-03-12 00:33:16,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 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) [2021-03-12 00:33:16,435 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:16,436 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:16,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-12 00:33:16,436 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:16,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2040552778, now seen corresponding path program 9 times [2021-03-12 00:33:16,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:16,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560054918] [2021-03-12 00:33:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:16,447 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,447 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:16,450 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,450 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,453 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,454 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:16,458 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,458 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,458 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,459 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,464 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,464 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:16,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560054918] [2021-03-12 00:33:16,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:16,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:33:16,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585542420] [2021-03-12 00:33:16,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:33:16,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:16,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:33:16,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:33:16,466 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 40 [2021-03-12 00:33:16,467 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 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) [2021-03-12 00:33:16,467 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:16,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 40 [2021-03-12 00:33:16,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:16,509 INFO L129 PetriNetUnfolder]: 5/38 cut-off events. [2021-03-12 00:33:16,509 INFO L130 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2021-03-12 00:33:16,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 38 events. 5/38 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 79 event pairs, 1 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 137. Up to 15 conditions per place. [2021-03-12 00:33:16,510 INFO L132 encePairwiseOnDemand]: 33/40 looper letters, 6 selfloop transitions, 12 changer transitions 4/29 dead transitions. [2021-03-12 00:33:16,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 29 transitions, 276 flow [2021-03-12 00:33:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:33:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:33:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2021-03-12 00:33:16,511 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2021-03-12 00:33:16,511 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 137 transitions. [2021-03-12 00:33:16,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 137 transitions. [2021-03-12 00:33:16,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:16,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 137 transitions. [2021-03-12 00:33:16,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 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) [2021-03-12 00:33:16,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 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) [2021-03-12 00:33:16,513 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 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) [2021-03-12 00:33:16,513 INFO L185 Difference]: Start difference. First operand has 43 places, 28 transitions, 226 flow. Second operand 6 states and 137 transitions. [2021-03-12 00:33:16,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 29 transitions, 276 flow [2021-03-12 00:33:16,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 29 transitions, 239 flow, removed 1 selfloop flow, removed 6 redundant places. [2021-03-12 00:33:16,516 INFO L241 Difference]: Finished difference. Result has 39 places, 24 transitions, 178 flow [2021-03-12 00:33:16,516 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=39, PETRI_TRANSITIONS=24} [2021-03-12 00:33:16,516 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 14 predicate places. [2021-03-12 00:33:16,516 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 24 transitions, 178 flow [2021-03-12 00:33:16,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 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) [2021-03-12 00:33:16,516 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:16,516 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:16,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-12 00:33:16,517 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:16,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:16,517 INFO L82 PathProgramCache]: Analyzing trace with hash -899858828, now seen corresponding path program 10 times [2021-03-12 00:33:16,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:16,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972286858] [2021-03-12 00:33:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:16,544 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,544 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:16,547 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,547 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,556 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,556 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,560 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,560 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,573 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:16,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972286858] [2021-03-12 00:33:16,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:16,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:33:16,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964086657] [2021-03-12 00:33:16,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:33:16,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:16,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:33:16,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:33:16,576 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 40 [2021-03-12 00:33:16,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 24 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 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) [2021-03-12 00:33:16,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:16,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 40 [2021-03-12 00:33:16,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:16,630 INFO L129 PetriNetUnfolder]: 2/26 cut-off events. [2021-03-12 00:33:16,631 INFO L130 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2021-03-12 00:33:16,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 26 events. 2/26 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 35 event pairs, 1 based on Foata normal form. 2/28 useless extension candidates. Maximal degree in co-relation 77. Up to 9 conditions per place. [2021-03-12 00:33:16,631 INFO L132 encePairwiseOnDemand]: 34/40 looper letters, 5 selfloop transitions, 3 changer transitions 8/23 dead transitions. [2021-03-12 00:33:16,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 23 transitions, 191 flow [2021-03-12 00:33:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:33:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:33:16,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2021-03-12 00:33:16,632 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.55625 [2021-03-12 00:33:16,632 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 178 transitions. [2021-03-12 00:33:16,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 178 transitions. [2021-03-12 00:33:16,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:16,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 178 transitions. [2021-03-12 00:33:16,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 22.25) internal successors, (178), 8 states have internal predecessors, (178), 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) [2021-03-12 00:33:16,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 40.0) internal successors, (360), 9 states have internal predecessors, (360), 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) [2021-03-12 00:33:16,634 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 40.0) internal successors, (360), 9 states have internal predecessors, (360), 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) [2021-03-12 00:33:16,634 INFO L185 Difference]: Start difference. First operand has 39 places, 24 transitions, 178 flow. Second operand 8 states and 178 transitions. [2021-03-12 00:33:16,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 23 transitions, 191 flow [2021-03-12 00:33:16,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 23 transitions, 161 flow, removed 1 selfloop flow, removed 7 redundant places. [2021-03-12 00:33:16,636 INFO L241 Difference]: Finished difference. Result has 38 places, 15 transitions, 78 flow [2021-03-12 00:33:16,636 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=78, PETRI_PLACES=38, PETRI_TRANSITIONS=15} [2021-03-12 00:33:16,636 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2021-03-12 00:33:16,636 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 15 transitions, 78 flow [2021-03-12 00:33:16,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 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) [2021-03-12 00:33:16,636 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:16,636 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:16,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-12 00:33:16,637 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:16,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1709359656, now seen corresponding path program 11 times [2021-03-12 00:33:16,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:16,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505225380] [2021-03-12 00:33:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:16,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:16,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,671 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,673 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:16,677 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,678 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,678 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,678 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,682 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,682 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:16,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505225380] [2021-03-12 00:33:16,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:16,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:33:16,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290532223] [2021-03-12 00:33:16,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:33:16,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:16,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:33:16,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:33:16,684 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 40 [2021-03-12 00:33:16,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 15 transitions, 78 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 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) [2021-03-12 00:33:16,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:16,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 40 [2021-03-12 00:33:16,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:16,704 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2021-03-12 00:33:16,705 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-03-12 00:33:16,705 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 11 events. 1/11 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2021-03-12 00:33:16,705 INFO L132 encePairwiseOnDemand]: 34/40 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-03-12 00:33:16,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 10 transitions, 74 flow [2021-03-12 00:33:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:33:16,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:33:16,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2021-03-12 00:33:16,706 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2021-03-12 00:33:16,706 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 128 transitions. [2021-03-12 00:33:16,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 128 transitions. [2021-03-12 00:33:16,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:16,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 128 transitions. [2021-03-12 00:33:16,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 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) [2021-03-12 00:33:16,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 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) [2021-03-12 00:33:16,707 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 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) [2021-03-12 00:33:16,707 INFO L185 Difference]: Start difference. First operand has 38 places, 15 transitions, 78 flow. Second operand 6 states and 128 transitions. [2021-03-12 00:33:16,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 10 transitions, 74 flow [2021-03-12 00:33:16,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 10 transitions, 49 flow, removed 3 selfloop flow, removed 10 redundant places. [2021-03-12 00:33:16,708 INFO L241 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2021-03-12 00:33:16,708 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2021-03-12 00:33:16,708 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, -4 predicate places. [2021-03-12 00:33:16,708 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2021-03-12 00:33:16,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 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) [2021-03-12 00:33:16,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-12 00:33:16,712 INFO L202 PluginConnector]: Adding new model ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.03 12:33:16 BasicIcfg [2021-03-12 00:33:16,712 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-12 00:33:16,713 INFO L168 Benchmark]: Toolchain (without parser) took 2739.60 ms. Allocated memory was 255.9 MB in the beginning and 434.1 MB in the end (delta: 178.3 MB). Free memory was 236.7 MB in the beginning and 406.5 MB in the end (delta: -169.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.0 GB. [2021-03-12 00:33:16,713 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-12 00:33:16,713 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.09 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-12 00:33:16,713 INFO L168 Benchmark]: Boogie Preprocessor took 11.63 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 852.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-12 00:33:16,714 INFO L168 Benchmark]: RCFGBuilder took 205.38 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 237.5 MB in the end (delta: -3.8 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-03-12 00:33:16,714 INFO L168 Benchmark]: TraceAbstraction took 2488.13 ms. Allocated memory was 255.9 MB in the beginning and 434.1 MB in the end (delta: 178.3 MB). Free memory was 236.8 MB in the beginning and 406.5 MB in the end (delta: -169.6 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. [2021-03-12 00:33:16,715 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.09 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.63 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 852.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 205.38 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 237.5 MB in the end (delta: -3.8 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2488.13 ms. Allocated memory was 255.9 MB in the beginning and 434.1 MB in the end (delta: 178.3 MB). Free memory was 236.8 MB in the beginning and 406.5 MB in the end (delta: -169.6 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 803.0ms, 35 PlacesBefore, 25 PlacesAfterwards, 25 TransitionsBefore, 15 TransitionsAfterwards, 234 CoEnabledTransitionPairs, 3 FixpointIterations, 1 TrivialSequentialCompositions, 9 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 10 TotalNumberOfCompositions, 466 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 294, positive: 259, positive conditional: 0, positive unconditional: 259, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 195, positive: 171, positive conditional: 0, positive unconditional: 171, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 195, positive: 153, positive conditional: 0, positive unconditional: 153, negative: 42, negative conditional: 0, negative unconditional: 42, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 42, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 230, positive: 98, positive conditional: 0, positive unconditional: 98, negative: 132, negative conditional: 0, negative unconditional: 132, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 294, positive: 88, positive conditional: 0, positive unconditional: 88, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 195, unknown conditional: 0, unknown unconditional: 195] , Statistics on independence cache: Total cache size (in pairs): 36, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9 - PositiveResult [Line: 65]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 11.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2394.5ms, OverallIterations: 11, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 748.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 879.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27 SDtfs, 23 SDslu, 5 SDs, 0 SdLazy, 532 SolverSat, 96 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 267.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 246.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=282occurred in iteration=6, InterpolantAutomatonStates: 67, 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: 17.1ms SsaConstructionTime, 125.3ms SatisfiabilityAnalysisTime, 462.8ms InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 461 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...