/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-OGIterative-Hitting.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-13 13:30:44,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-13 13:30:44,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-13 13:30:44,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-13 13:30:44,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-13 13:30:44,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-13 13:30:44,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-13 13:30:44,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-13 13:30:44,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-13 13:30:44,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-13 13:30:44,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-13 13:30:44,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-13 13:30:44,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-13 13:30:44,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-13 13:30:44,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-13 13:30:44,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-13 13:30:44,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-13 13:30:44,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-13 13:30:44,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-13 13:30:44,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-13 13:30:44,745 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-OGIterative-Hitting.epf [2021-08-13 13:30:44,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-13 13:30:44,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-13 13:30:44,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-13 13:30:44,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-13 13:30:44,768 INFO L138 SettingsManager]: * Use SBE=true [2021-08-13 13:30:44,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-13 13:30:44,769 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-13 13:30:44,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-13 13:30:44,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-13 13:30:44,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-13 13:30:44,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-13 13:30:44,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-13 13:30:44,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-13 13:30:44,770 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-13 13:30:44,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-13 13:30:44,770 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-13 13:30:44,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-13 13:30:44,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-13 13:30:44,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-13 13:30:44,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-13 13:30:44,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-13 13:30:44,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 13:30:44,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-13 13:30:44,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-13 13:30:44,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-13 13:30:44,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-13 13:30:44,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-13 13:30:44,773 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-13 13:30:44,773 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-13 13:30:44,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-13 13:30:44,773 INFO L138 SettingsManager]: * Compute cosets for OwickiGries annotation iteratively=true [2021-08-13 13:30:44,773 INFO L138 SettingsManager]: * Use hitting sets in computation of OwickiGries annotation=true [2021-08-13 13:30:44,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-13 13:30:45,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-13 13:30:45,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-13 13:30:45,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-13 13:30:45,088 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-13 13:30:45,089 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-13 13:30:45,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl [2021-08-13 13:30:45,091 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl' [2021-08-13 13:30:45,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-13 13:30:45,122 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-13 13:30:45,122 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-13 13:30:45,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-13 13:30:45,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-13 13:30:45,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 01:30:45" (1/1) ... [2021-08-13 13:30:45,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 01:30:45" (1/1) ... [2021-08-13 13:30:45,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-13 13:30:45,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-13 13:30:45,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-13 13:30:45,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-13 13:30:45,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 01:30:45" (1/1) ... [2021-08-13 13:30:45,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 01:30:45" (1/1) ... [2021-08-13 13:30:45,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 01:30:45" (1/1) ... [2021-08-13 13:30:45,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 01:30:45" (1/1) ... [2021-08-13 13:30:45,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 01:30:45" (1/1) ... [2021-08-13 13:30:45,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 01:30:45" (1/1) ... [2021-08-13 13:30:45,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 01:30:45" (1/1) ... [2021-08-13 13:30:45,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-13 13:30:45,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-13 13:30:45,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-13 13:30:45,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-13 13:30:45,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 01:30:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 13:30:45,247 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-13 13:30:45,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-13 13:30:45,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-13 13:30:45,248 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-13 13:30:45,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-13 13:30:45,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-13 13:30:45,248 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-13 13:30:45,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-13 13:30:45,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-13 13:30:45,249 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-13 13:30:45,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-13 13:30:45,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-13 13:30:45,250 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-13 13:30:45,382 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-13 13:30:45,382 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-13 13:30:45,383 INFO L202 PluginConnector]: Adding new model simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 01:30:45 BoogieIcfgContainer [2021-08-13 13:30:45,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-13 13:30:45,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-13 13:30:45,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-13 13:30:45,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-13 13:30:45,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 01:30:45" (1/2) ... [2021-08-13 13:30:45,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e3350f and model type simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.08 01:30:45, skipping insertion in model container [2021-08-13 13:30:45,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 01:30:45" (2/2) ... [2021-08-13 13:30:45,390 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-equiv.wvr.bpl [2021-08-13 13:30:45,395 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-13 13:30:45,396 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-13 13:30:45,397 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-13 13:30:45,430 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-13 13:30:45,452 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-13 13:30:45,480 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 13:30:45,480 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 13:30:45,480 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 13:30:45,480 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 13:30:45,480 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 13:30:45,480 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 13:30:45,480 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 13:30:45,481 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 13:30:45,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 33 places, 23 transitions, 70 flow [2021-08-13 13:30:45,510 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-08-13 13:30:45,510 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-08-13 13:30:45,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 20 events. 0/20 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-08-13 13:30:45,512 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 23 transitions, 70 flow [2021-08-13 13:30:45,516 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 18 transitions, 54 flow [2021-08-13 13:30:45,525 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-08-13 13:30:45,525 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-08-13 13:30:45,525 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 13:30:45,526 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 13:30:45,526 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 13:30:45,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 13:30:45,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1686047739, now seen corresponding path program 1 times [2021-08-13 13:30:45,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 13:30:45,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888763726] [2021-08-13 13:30:45,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 13:30:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 13:30:45,678 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:45,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 13:30:45,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:45,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:45,739 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:45,740 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:45,768 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:45,769 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:45,781 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:45,782 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:45,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:45,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:45,801 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-08-13 13:30:45,802 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 13:30:45,805 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:45,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 13:30:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 13:30:45,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 13:30:45,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888763726] [2021-08-13 13:30:45,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888763726] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 13:30:45,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 13:30:45,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 13:30:45,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035097916] [2021-08-13 13:30:45,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 13:30:45,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 13:30:45,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 13:30:45,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-13 13:30:45,845 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-08-13 13:30:45,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 18 transitions, 54 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:45,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 13:30:45,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-08-13 13:30:45,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 13:30:46,129 INFO L129 PetriNetUnfolder]: 22/78 cut-off events. [2021-08-13 13:30:46,129 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-08-13 13:30:46,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 78 events. 22/78 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 268 event pairs, 1 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 128. Up to 29 conditions per place. [2021-08-13 13:30:46,135 INFO L132 encePairwiseOnDemand]: 15/23 looper letters, 6 selfloop transitions, 13 changer transitions 8/37 dead transitions. [2021-08-13 13:30:46,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 146 flow [2021-08-13 13:30:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-13 13:30:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-08-13 13:30:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2021-08-13 13:30:46,148 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7439613526570048 [2021-08-13 13:30:46,148 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 154 transitions. [2021-08-13 13:30:46,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 154 transitions. [2021-08-13 13:30:46,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 13:30:46,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 154 transitions. [2021-08-13 13:30:46,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.11111111111111) internal successors, (154), 9 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,167 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,168 INFO L348 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2021-08-13 13:30:46,168 INFO L482 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 146 flow [2021-08-13 13:30:46,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,168 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 13:30:46,169 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 13:30:46,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-13 13:30:46,169 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 13:30:46,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 13:30:46,171 INFO L82 PathProgramCache]: Analyzing trace with hash 35307057, now seen corresponding path program 2 times [2021-08-13 13:30:46,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 13:30:46,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130942921] [2021-08-13 13:30:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 13:30:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 13:30:46,247 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,247 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 13:30:46,252 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,255 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:46,265 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,267 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:46,284 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 13:30:46,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,293 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 13:30:46,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:46,310 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-08-13 13:30:46,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 13:30:46,314 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,315 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 13:30:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 13:30:46,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 13:30:46,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130942921] [2021-08-13 13:30:46,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130942921] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 13:30:46,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 13:30:46,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-13 13:30:46,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438443878] [2021-08-13 13:30:46,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-13 13:30:46,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 13:30:46,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-13 13:30:46,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-13 13:30:46,322 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-08-13 13:30:46,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 13:30:46,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-08-13 13:30:46,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 13:30:46,464 INFO L129 PetriNetUnfolder]: 23/114 cut-off events. [2021-08-13 13:30:46,467 INFO L130 PetriNetUnfolder]: For 26/32 co-relation queries the response was YES. [2021-08-13 13:30:46,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 114 events. 23/114 cut-off events. For 26/32 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 528 event pairs, 0 based on Foata normal form. 3/116 useless extension candidates. Maximal degree in co-relation 246. Up to 42 conditions per place. [2021-08-13 13:30:46,470 INFO L132 encePairwiseOnDemand]: 15/23 looper letters, 7 selfloop transitions, 22 changer transitions 19/58 dead transitions. [2021-08-13 13:30:46,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 58 transitions, 326 flow [2021-08-13 13:30:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-13 13:30:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-08-13 13:30:46,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2021-08-13 13:30:46,480 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7729468599033816 [2021-08-13 13:30:46,480 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 160 transitions. [2021-08-13 13:30:46,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 160 transitions. [2021-08-13 13:30:46,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 13:30:46,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 160 transitions. [2021-08-13 13:30:46,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,486 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,486 INFO L348 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2021-08-13 13:30:46,486 INFO L482 AbstractCegarLoop]: Abstraction has has 44 places, 58 transitions, 326 flow [2021-08-13 13:30:46,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,486 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 13:30:46,487 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 13:30:46,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-13 13:30:46,487 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 13:30:46,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 13:30:46,490 INFO L82 PathProgramCache]: Analyzing trace with hash -2140773439, now seen corresponding path program 3 times [2021-08-13 13:30:46,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 13:30:46,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171455376] [2021-08-13 13:30:46,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 13:30:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 13:30:46,551 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,552 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 13:30:46,557 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,558 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:46,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:46,579 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,581 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 13:30:46,584 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,585 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 13:30:46,594 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:46,609 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-08-13 13:30:46,609 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 13:30:46,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,612 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 13:30:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 13:30:46,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 13:30:46,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171455376] [2021-08-13 13:30:46,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171455376] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 13:30:46,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 13:30:46,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 13:30:46,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975709560] [2021-08-13 13:30:46,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 13:30:46,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 13:30:46,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 13:30:46,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-13 13:30:46,617 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-08-13 13:30:46,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 58 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 13:30:46,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-08-13 13:30:46,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 13:30:46,800 INFO L129 PetriNetUnfolder]: 24/132 cut-off events. [2021-08-13 13:30:46,800 INFO L130 PetriNetUnfolder]: For 46/50 co-relation queries the response was YES. [2021-08-13 13:30:46,802 INFO L84 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 132 events. 24/132 cut-off events. For 46/50 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 717 event pairs, 0 based on Foata normal form. 6/138 useless extension candidates. Maximal degree in co-relation 361. Up to 50 conditions per place. [2021-08-13 13:30:46,804 INFO L132 encePairwiseOnDemand]: 15/23 looper letters, 6 selfloop transitions, 15 changer transitions 40/71 dead transitions. [2021-08-13 13:30:46,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 526 flow [2021-08-13 13:30:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-13 13:30:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-08-13 13:30:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2021-08-13 13:30:46,807 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2021-08-13 13:30:46,807 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 161 transitions. [2021-08-13 13:30:46,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 161 transitions. [2021-08-13 13:30:46,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 13:30:46,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 161 transitions. [2021-08-13 13:30:46,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,810 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,810 INFO L348 CegarLoopForPetriNet]: 28 programPoint places, 24 predicate places. [2021-08-13 13:30:46,810 INFO L482 AbstractCegarLoop]: Abstraction has has 52 places, 71 transitions, 526 flow [2021-08-13 13:30:46,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,811 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 13:30:46,811 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 13:30:46,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-13 13:30:46,811 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 13:30:46,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 13:30:46,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1752707659, now seen corresponding path program 4 times [2021-08-13 13:30:46,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 13:30:46,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793658663] [2021-08-13 13:30:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 13:30:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 13:30:46,860 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,860 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 13:30:46,863 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 13:30:46,868 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,868 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:46,878 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,879 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:46,888 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 13:30:46,895 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,896 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:46,909 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-08-13 13:30:46,910 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 13:30:46,912 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:46,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 13:30:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 13:30:46,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 13:30:46,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793658663] [2021-08-13 13:30:46,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793658663] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 13:30:46,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 13:30:46,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 13:30:46,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142840523] [2021-08-13 13:30:46,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 13:30:46,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 13:30:46,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 13:30:46,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-13 13:30:46,920 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-08-13 13:30:46,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 71 transitions, 526 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:46,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 13:30:46,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-08-13 13:30:46,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 13:30:47,081 INFO L129 PetriNetUnfolder]: 19/158 cut-off events. [2021-08-13 13:30:47,081 INFO L130 PetriNetUnfolder]: For 78/88 co-relation queries the response was YES. [2021-08-13 13:30:47,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 158 events. 19/158 cut-off events. For 78/88 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 985 event pairs, 0 based on Foata normal form. 3/160 useless extension candidates. Maximal degree in co-relation 482. Up to 57 conditions per place. [2021-08-13 13:30:47,083 INFO L132 encePairwiseOnDemand]: 15/23 looper letters, 5 selfloop transitions, 13 changer transitions 54/82 dead transitions. [2021-08-13 13:30:47,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 758 flow [2021-08-13 13:30:47,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 13:30:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 13:30:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2021-08-13 13:30:47,088 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7565217391304347 [2021-08-13 13:30:47,088 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 174 transitions. [2021-08-13 13:30:47,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 174 transitions. [2021-08-13 13:30:47,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 13:30:47,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 174 transitions. [2021-08-13 13:30:47,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 17.4) internal successors, (174), 10 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:47,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 23.0) internal successors, (253), 11 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:47,090 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 23.0) internal successors, (253), 11 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:47,091 INFO L348 CegarLoopForPetriNet]: 28 programPoint places, 33 predicate places. [2021-08-13 13:30:47,091 INFO L482 AbstractCegarLoop]: Abstraction has has 61 places, 82 transitions, 758 flow [2021-08-13 13:30:47,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:47,092 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 13:30:47,092 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 13:30:47,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-13 13:30:47,092 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 13:30:47,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 13:30:47,092 INFO L82 PathProgramCache]: Analyzing trace with hash -806385245, now seen corresponding path program 5 times [2021-08-13 13:30:47,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 13:30:47,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024726228] [2021-08-13 13:30:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 13:30:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 13:30:47,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:47,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 13:30:47,139 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:47,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 13:30:47,144 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:47,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:47,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:47,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:47,165 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:47,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:47,176 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:47,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:47,185 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-08-13 13:30:47,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 13:30:47,189 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:47,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 13:30:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 13:30:47,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 13:30:47,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024726228] [2021-08-13 13:30:47,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024726228] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 13:30:47,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 13:30:47,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 13:30:47,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010430412] [2021-08-13 13:30:47,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 13:30:47,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 13:30:47,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 13:30:47,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-13 13:30:47,191 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-08-13 13:30:47,192 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 82 transitions, 758 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:47,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 13:30:47,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-08-13 13:30:47,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 13:30:47,320 INFO L129 PetriNetUnfolder]: 18/169 cut-off events. [2021-08-13 13:30:47,321 INFO L130 PetriNetUnfolder]: For 108/120 co-relation queries the response was YES. [2021-08-13 13:30:47,321 INFO L84 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 169 events. 18/169 cut-off events. For 108/120 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1115 event pairs, 0 based on Foata normal form. 3/171 useless extension candidates. Maximal degree in co-relation 597. Up to 56 conditions per place. [2021-08-13 13:30:47,322 INFO L132 encePairwiseOnDemand]: 15/23 looper letters, 6 selfloop transitions, 4 changer transitions 64/84 dead transitions. [2021-08-13 13:30:47,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 926 flow [2021-08-13 13:30:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-13 13:30:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-08-13 13:30:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2021-08-13 13:30:47,323 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7470355731225297 [2021-08-13 13:30:47,323 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 189 transitions. [2021-08-13 13:30:47,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 189 transitions. [2021-08-13 13:30:47,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 13:30:47,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 189 transitions. [2021-08-13 13:30:47,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 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) [2021-08-13 13:30:47,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 23.0) internal successors, (276), 12 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:47,325 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 23.0) internal successors, (276), 12 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:47,325 INFO L348 CegarLoopForPetriNet]: 28 programPoint places, 43 predicate places. [2021-08-13 13:30:47,325 INFO L482 AbstractCegarLoop]: Abstraction has has 71 places, 84 transitions, 926 flow [2021-08-13 13:30:47,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:47,326 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 13:30:47,326 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 13:30:47,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-13 13:30:47,326 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 13:30:47,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 13:30:47,326 INFO L82 PathProgramCache]: Analyzing trace with hash 625734621, now seen corresponding path program 6 times [2021-08-13 13:30:47,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 13:30:47,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151681497] [2021-08-13 13:30:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 13:30:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 13:30:47,372 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:47,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 13:30:47,379 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:47,379 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 13:30:47,384 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:47,385 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:47,393 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:47,393 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:47,402 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:47,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:47,414 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:47,418 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-08-13 13:30:47,420 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-08-13 13:30:47,421 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 13:30:47,423 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 13:30:47,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 13:30:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 13:30:47,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 13:30:47,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151681497] [2021-08-13 13:30:47,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151681497] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 13:30:47,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 13:30:47,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 13:30:47,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180720249] [2021-08-13 13:30:47,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 13:30:47,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 13:30:47,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 13:30:47,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-13 13:30:47,426 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 23 [2021-08-13 13:30:47,426 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 84 transitions, 926 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:47,426 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 13:30:47,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 23 [2021-08-13 13:30:47,426 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 13:30:47,544 INFO L129 PetriNetUnfolder]: 16/172 cut-off events. [2021-08-13 13:30:47,544 INFO L130 PetriNetUnfolder]: For 131/145 co-relation queries the response was YES. [2021-08-13 13:30:47,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 172 events. 16/172 cut-off events. For 131/145 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1177 event pairs, 0 based on Foata normal form. 3/174 useless extension candidates. Maximal degree in co-relation 685. Up to 63 conditions per place. [2021-08-13 13:30:47,546 INFO L132 encePairwiseOnDemand]: 15/23 looper letters, 0 selfloop transitions, 0 changer transitions 84/84 dead transitions. [2021-08-13 13:30:47,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 1086 flow [2021-08-13 13:30:47,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-13 13:30:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-08-13 13:30:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2021-08-13 13:30:47,547 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7577639751552795 [2021-08-13 13:30:47,547 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 122 transitions. [2021-08-13 13:30:47,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 122 transitions. [2021-08-13 13:30:47,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 13:30:47,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 122 transitions. [2021-08-13 13:30:47,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 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) [2021-08-13 13:30:47,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:47,550 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:47,550 INFO L348 CegarLoopForPetriNet]: 28 programPoint places, 47 predicate places. [2021-08-13 13:30:47,550 INFO L482 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 1086 flow [2021-08-13 13:30:47,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 13:30:47,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown