/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-OGIterative-CovSimpl-Hitting.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-13 18:26:38,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-13 18:26:38,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-13 18:26:38,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-13 18:26:38,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-13 18:26:38,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-13 18:26:38,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-13 18:26:38,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-13 18:26:38,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-13 18:26:38,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-13 18:26:38,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-13 18:26:38,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-13 18:26:38,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-13 18:26:38,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-13 18:26:38,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-13 18:26:38,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-13 18:26:38,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-13 18:26:38,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-13 18:26:38,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-13 18:26:38,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-13 18:26:38,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-OGIterative-CovSimpl-Hitting.epf [2021-08-13 18:26:38,123 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-13 18:26:38,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-13 18:26:38,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-13 18:26:38,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-13 18:26:38,125 INFO L138 SettingsManager]: * Use SBE=true [2021-08-13 18:26:38,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-13 18:26:38,125 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-13 18:26:38,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-13 18:26:38,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-13 18:26:38,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-13 18:26:38,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-13 18:26:38,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-13 18:26:38,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-13 18:26:38,126 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-13 18:26:38,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-13 18:26:38,135 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-13 18:26:38,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-13 18:26:38,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-13 18:26:38,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-13 18:26:38,136 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-13 18:26:38,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-13 18:26:38,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 18:26:38,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-13 18:26:38,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-13 18:26:38,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-13 18:26:38,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-13 18:26:38,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-13 18:26:38,137 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-13 18:26:38,137 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-13 18:26:38,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-13 18:26:38,137 INFO L138 SettingsManager]: * Compute cosets for OwickiGries annotation iteratively=true [2021-08-13 18:26:38,137 INFO L138 SettingsManager]: * Use hitting sets in computation of OwickiGries annotation=true [2021-08-13 18:26:38,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-13 18:26:38,138 INFO L138 SettingsManager]: * Simplify away covered predicates in OwickiGries annotation=true WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-13 18:26:38,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-13 18:26:38,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-13 18:26:38,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-13 18:26:38,441 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-13 18:26:38,442 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-13 18:26:38,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl [2021-08-13 18:26:38,452 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl' [2021-08-13 18:26:38,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-13 18:26:38,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-13 18:26:38,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-13 18:26:38,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-13 18:26:38,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-13 18:26:38,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 06:26:38" (1/1) ... [2021-08-13 18:26:38,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 06:26:38" (1/1) ... [2021-08-13 18:26:38,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-13 18:26:38,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-13 18:26:38,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-13 18:26:38,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-13 18:26:38,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 06:26:38" (1/1) ... [2021-08-13 18:26:38,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 06:26:38" (1/1) ... [2021-08-13 18:26:38,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 06:26:38" (1/1) ... [2021-08-13 18:26:38,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 06:26:38" (1/1) ... [2021-08-13 18:26:38,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 06:26:38" (1/1) ... [2021-08-13 18:26:38,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 06:26:38" (1/1) ... [2021-08-13 18:26:38,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 06:26:38" (1/1) ... [2021-08-13 18:26:38,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-13 18:26:38,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-13 18:26:38,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-13 18:26:38,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-13 18:26:38,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 06:26:38" (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 18:26:38,577 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-13 18:26:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-13 18:26:38,577 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-13 18:26:38,578 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-13 18:26:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-13 18:26:38,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-13 18:26:38,578 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-13 18:26:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-13 18:26:38,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-13 18:26:38,579 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 18:26:38,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-13 18:26:38,719 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-13 18:26:38,720 INFO L202 PluginConnector]: Adding new model bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 06:26:38 BoogieIcfgContainer [2021-08-13 18:26:38,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-13 18:26:38,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-13 18:26:38,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-13 18:26:38,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-13 18:26:38,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 06:26:38" (1/2) ... [2021-08-13 18:26:38,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d22ba04 and model type bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.08 06:26:38, skipping insertion in model container [2021-08-13 18:26:38,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 06:26:38" (2/2) ... [2021-08-13 18:26:38,727 INFO L111 eAbstractionObserver]: Analyzing ICFG bakery-2.wvr.bpl [2021-08-13 18:26:38,732 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-13 18:26:38,733 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-13 18:26:38,734 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-13 18:26:38,763 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-13 18:26:38,783 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-13 18:26:38,802 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 18:26:38,803 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 18:26:38,803 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 18:26:38,803 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 18:26:38,803 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 18:26:38,803 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 18:26:38,803 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 18:26:38,803 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 18:26:38,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 78 flow [2021-08-13 18:26:38,846 INFO L129 PetriNetUnfolder]: 0/29 cut-off events. [2021-08-13 18:26:38,846 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-08-13 18:26:38,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 29 events. 0/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-08-13 18:26:38,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 78 flow [2021-08-13 18:26:38,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 27 transitions, 66 flow [2021-08-13 18:26:38,865 INFO L129 PetriNetUnfolder]: 0/26 cut-off events. [2021-08-13 18:26:38,865 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-08-13 18:26:38,866 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 18:26:38,866 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 18:26:38,867 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 18:26:38,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 18:26:38,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1562918420, now seen corresponding path program 1 times [2021-08-13 18:26:38,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 18:26:38,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336173285] [2021-08-13 18:26:38,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 18:26:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 18:26:39,052 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:39,087 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,089 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:39,106 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,121 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:39,144 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:39,163 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-08-13 18:26:39,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:39,183 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,184 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 18:26:39,185 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 18:26:39,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 18:26:39,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336173285] [2021-08-13 18:26:39,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336173285] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 18:26:39,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 18:26:39,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 18:26:39,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965029313] [2021-08-13 18:26:39,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 18:26:39,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 18:26:39,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 18:26:39,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-13 18:26:39,222 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 31 [2021-08-13 18:26:39,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 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 18:26:39,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 18:26:39,227 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 31 [2021-08-13 18:26:39,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 18:26:39,405 INFO L129 PetriNetUnfolder]: 1/59 cut-off events. [2021-08-13 18:26:39,405 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-08-13 18:26:39,407 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 59 events. 1/59 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 163 event pairs, 0 based on Foata normal form. 1/59 useless extension candidates. Maximal degree in co-relation 64. Up to 5 conditions per place. [2021-08-13 18:26:39,408 INFO L132 encePairwiseOnDemand]: 25/31 looper letters, 7 selfloop transitions, 7 changer transitions 2/37 dead transitions. [2021-08-13 18:26:39,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 37 transitions, 118 flow [2021-08-13 18:26:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-13 18:26:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-08-13 18:26:39,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2021-08-13 18:26:39,423 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.842741935483871 [2021-08-13 18:26:39,424 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 209 transitions. [2021-08-13 18:26:39,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 209 transitions. [2021-08-13 18:26:39,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 18:26:39,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 209 transitions. [2021-08-13 18:26:39,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 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 18:26:39,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 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 18:26:39,445 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 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 18:26:39,445 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2021-08-13 18:26:39,446 INFO L482 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 118 flow [2021-08-13 18:26:39,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 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 18:26:39,446 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 18:26:39,446 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 18:26:39,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-13 18:26:39,447 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 18:26:39,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 18:26:39,448 INFO L82 PathProgramCache]: Analyzing trace with hash -965493228, now seen corresponding path program 2 times [2021-08-13 18:26:39,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 18:26:39,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486195024] [2021-08-13 18:26:39,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 18:26:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 18:26:39,502 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:39,508 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,509 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:39,515 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,516 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:39,523 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,524 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:39,538 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-08-13 18:26:39,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:39,553 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,554 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 18:26:39,554 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 18:26:39,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 18:26:39,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486195024] [2021-08-13 18:26:39,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486195024] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 18:26:39,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 18:26:39,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 18:26:39,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142418283] [2021-08-13 18:26:39,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 18:26:39,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 18:26:39,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 18:26:39,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-13 18:26:39,561 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 31 [2021-08-13 18:26:39,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 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 18:26:39,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 18:26:39,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 31 [2021-08-13 18:26:39,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 18:26:39,708 INFO L129 PetriNetUnfolder]: 1/57 cut-off events. [2021-08-13 18:26:39,708 INFO L130 PetriNetUnfolder]: For 14/16 co-relation queries the response was YES. [2021-08-13 18:26:39,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 57 events. 1/57 cut-off events. For 14/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 151 event pairs, 0 based on Foata normal form. 1/58 useless extension candidates. Maximal degree in co-relation 78. Up to 5 conditions per place. [2021-08-13 18:26:39,709 INFO L132 encePairwiseOnDemand]: 25/31 looper letters, 4 selfloop transitions, 7 changer transitions 6/38 dead transitions. [2021-08-13 18:26:39,709 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 38 transitions, 156 flow [2021-08-13 18:26:39,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-13 18:26:39,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-08-13 18:26:39,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2021-08-13 18:26:39,715 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8387096774193549 [2021-08-13 18:26:39,716 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 208 transitions. [2021-08-13 18:26:39,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 208 transitions. [2021-08-13 18:26:39,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 18:26:39,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 208 transitions. [2021-08-13 18:26:39,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 18:26:39,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 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 18:26:39,728 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 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 18:26:39,728 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2021-08-13 18:26:39,729 INFO L482 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 156 flow [2021-08-13 18:26:39,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 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 18:26:39,729 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 18:26:39,729 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 18:26:39,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-13 18:26:39,729 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 18:26:39,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 18:26:39,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1298833898, now seen corresponding path program 3 times [2021-08-13 18:26:39,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 18:26:39,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573197097] [2021-08-13 18:26:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 18:26:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 18:26:39,798 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,799 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:39,805 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:39,808 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 18:26:39,815 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-08-13 18:26:39,818 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:39,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 18:26:39,843 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,843 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 18:26:39,844 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 18:26:39,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 18:26:39,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573197097] [2021-08-13 18:26:39,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573197097] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 18:26:39,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 18:26:39,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-13 18:26:39,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695755474] [2021-08-13 18:26:39,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-13 18:26:39,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 18:26:39,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-13 18:26:39,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-13 18:26:39,847 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 31 [2021-08-13 18:26:39,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 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 18:26:39,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 18:26:39,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 31 [2021-08-13 18:26:39,848 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 18:26:39,936 INFO L129 PetriNetUnfolder]: 33/178 cut-off events. [2021-08-13 18:26:39,936 INFO L130 PetriNetUnfolder]: For 26/30 co-relation queries the response was YES. [2021-08-13 18:26:39,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 178 events. 33/178 cut-off events. For 26/30 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 851 event pairs, 5 based on Foata normal form. 2/174 useless extension candidates. Maximal degree in co-relation 330. Up to 52 conditions per place. [2021-08-13 18:26:39,938 INFO L132 encePairwiseOnDemand]: 25/31 looper letters, 12 selfloop transitions, 5 changer transitions 13/55 dead transitions. [2021-08-13 18:26:39,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 242 flow [2021-08-13 18:26:39,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-13 18:26:39,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-08-13 18:26:39,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2021-08-13 18:26:39,944 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8225806451612904 [2021-08-13 18:26:39,944 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 153 transitions. [2021-08-13 18:26:39,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 153 transitions. [2021-08-13 18:26:39,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 18:26:39,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 153 transitions. [2021-08-13 18:26:39,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 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 18:26:39,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 18:26:39,947 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 18:26:39,947 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2021-08-13 18:26:39,947 INFO L482 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 242 flow [2021-08-13 18:26:39,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 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 18:26:39,948 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 18:26:39,948 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 18:26:39,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-13 18:26:39,950 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 18:26:39,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 18:26:39,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1594527836, now seen corresponding path program 4 times [2021-08-13 18:26:39,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 18:26:39,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337011370] [2021-08-13 18:26:39,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 18:26:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 18:26:39,973 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,973 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 18:26:39,974 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 18:26:39,976 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:39,976 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 18:26:39,977 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 18:26:39,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 18:26:39,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337011370] [2021-08-13 18:26:39,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337011370] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 18:26:39,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 18:26:39,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 18:26:39,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711706494] [2021-08-13 18:26:39,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 18:26:39,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 18:26:39,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 18:26:39,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 18:26:39,979 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 31 [2021-08-13 18:26:39,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 18:26:39,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 18:26:39,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 31 [2021-08-13 18:26:39,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 18:26:40,012 INFO L129 PetriNetUnfolder]: 32/183 cut-off events. [2021-08-13 18:26:40,013 INFO L130 PetriNetUnfolder]: For 28/32 co-relation queries the response was YES. [2021-08-13 18:26:40,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 183 events. 32/183 cut-off events. For 28/32 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 896 event pairs, 8 based on Foata normal form. 3/180 useless extension candidates. Maximal degree in co-relation 354. Up to 52 conditions per place. [2021-08-13 18:26:40,015 INFO L132 encePairwiseOnDemand]: 28/31 looper letters, 2 selfloop transitions, 2 changer transitions 14/55 dead transitions. [2021-08-13 18:26:40,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 250 flow [2021-08-13 18:26:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 18:26:40,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 18:26:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2021-08-13 18:26:40,016 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8924731182795699 [2021-08-13 18:26:40,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2021-08-13 18:26:40,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2021-08-13 18:26:40,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 18:26:40,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2021-08-13 18:26:40,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 18:26:40,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 18:26:40,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 18:26:40,021 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2021-08-13 18:26:40,021 INFO L482 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 250 flow [2021-08-13 18:26:40,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 18:26:40,021 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 18:26:40,022 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 18:26:40,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-13 18:26:40,022 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 18:26:40,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 18:26:40,022 INFO L82 PathProgramCache]: Analyzing trace with hash 783863264, now seen corresponding path program 5 times [2021-08-13 18:26:40,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 18:26:40,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402398108] [2021-08-13 18:26:40,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 18:26:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 18:26:40,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,067 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-08-13 18:26:40,084 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,085 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 18:26:40,099 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,101 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 18:26:40,102 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-08-13 18:26:40,116 INFO L142 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size [2021-08-13 18:26:40,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-08-13 18:26:40,131 INFO L142 QuantifierPusher]: treesize reduction 15, result has 46.4 percent of original size [2021-08-13 18:26:40,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-08-13 18:26:40,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 18:26:40,143 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 18:26:40,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 18:26:40,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402398108] [2021-08-13 18:26:40,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402398108] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 18:26:40,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 18:26:40,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 18:26:40,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562430876] [2021-08-13 18:26:40,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 18:26:40,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 18:26:40,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 18:26:40,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-13 18:26:40,155 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 31 [2021-08-13 18:26:40,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 18:26:40,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 18:26:40,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 31 [2021-08-13 18:26:40,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 18:26:40,236 INFO L129 PetriNetUnfolder]: 22/157 cut-off events. [2021-08-13 18:26:40,236 INFO L130 PetriNetUnfolder]: For 60/74 co-relation queries the response was YES. [2021-08-13 18:26:40,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 157 events. 22/157 cut-off events. For 60/74 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 706 event pairs, 8 based on Foata normal form. 2/153 useless extension candidates. Maximal degree in co-relation 357. Up to 49 conditions per place. [2021-08-13 18:26:40,237 INFO L132 encePairwiseOnDemand]: 23/31 looper letters, 8 selfloop transitions, 2 changer transitions 22/57 dead transitions. [2021-08-13 18:26:40,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 57 transitions, 314 flow [2021-08-13 18:26:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-13 18:26:40,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-08-13 18:26:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2021-08-13 18:26:40,239 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7926267281105991 [2021-08-13 18:26:40,239 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 172 transitions. [2021-08-13 18:26:40,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 172 transitions. [2021-08-13 18:26:40,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 18:26:40,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 172 transitions. [2021-08-13 18:26:40,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 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 18:26:40,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 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 18:26:40,241 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 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 18:26:40,241 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 27 predicate places. [2021-08-13 18:26:40,241 INFO L482 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 314 flow [2021-08-13 18:26:40,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 18:26:40,241 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 18:26:40,241 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 18:26:40,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-13 18:26:40,241 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 18:26:40,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 18:26:40,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1160043718, now seen corresponding path program 6 times [2021-08-13 18:26:40,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 18:26:40,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755658423] [2021-08-13 18:26:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 18:26:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 18:26:40,252 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,252 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 18:26:40,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 18:26:40,255 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,256 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 18:26:40,256 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 18:26:40,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 18:26:40,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755658423] [2021-08-13 18:26:40,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755658423] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 18:26:40,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 18:26:40,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 18:26:40,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809240295] [2021-08-13 18:26:40,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 18:26:40,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 18:26:40,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 18:26:40,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 18:26:40,258 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 31 [2021-08-13 18:26:40,258 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 18:26:40,258 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 18:26:40,258 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 31 [2021-08-13 18:26:40,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 18:26:40,275 INFO L129 PetriNetUnfolder]: 23/165 cut-off events. [2021-08-13 18:26:40,275 INFO L130 PetriNetUnfolder]: For 61/73 co-relation queries the response was YES. [2021-08-13 18:26:40,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 165 events. 23/165 cut-off events. For 61/73 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 755 event pairs, 10 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 391. Up to 53 conditions per place. [2021-08-13 18:26:40,279 INFO L132 encePairwiseOnDemand]: 28/31 looper letters, 2 selfloop transitions, 2 changer transitions 22/57 dead transitions. [2021-08-13 18:26:40,279 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 322 flow [2021-08-13 18:26:40,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 18:26:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 18:26:40,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2021-08-13 18:26:40,280 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8924731182795699 [2021-08-13 18:26:40,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2021-08-13 18:26:40,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2021-08-13 18:26:40,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 18:26:40,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2021-08-13 18:26:40,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 18:26:40,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 18:26:40,281 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 18:26:40,281 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2021-08-13 18:26:40,281 INFO L482 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 322 flow [2021-08-13 18:26:40,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 18:26:40,281 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 18:26:40,281 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 18:26:40,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-13 18:26:40,281 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 18:26:40,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 18:26:40,282 INFO L82 PathProgramCache]: Analyzing trace with hash 413003346, now seen corresponding path program 7 times [2021-08-13 18:26:40,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 18:26:40,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523455252] [2021-08-13 18:26:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 18:26:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 18:26:40,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-08-13 18:26:40,314 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,315 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 18:26:40,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:40,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:40,341 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,342 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 18:26:40,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,352 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 18:26:40,359 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,360 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 18:26:40,361 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 18:26:40,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 18:26:40,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523455252] [2021-08-13 18:26:40,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523455252] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 18:26:40,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 18:26:40,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-13 18:26:40,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416311585] [2021-08-13 18:26:40,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-13 18:26:40,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 18:26:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-13 18:26:40,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-13 18:26:40,370 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 31 [2021-08-13 18:26:40,370 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 322 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 18:26:40,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 18:26:40,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 31 [2021-08-13 18:26:40,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 18:26:40,496 INFO L129 PetriNetUnfolder]: 19/183 cut-off events. [2021-08-13 18:26:40,496 INFO L130 PetriNetUnfolder]: For 139/169 co-relation queries the response was YES. [2021-08-13 18:26:40,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 183 events. 19/183 cut-off events. For 139/169 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 924 event pairs, 3 based on Foata normal form. 3/184 useless extension candidates. Maximal degree in co-relation 474. Up to 55 conditions per place. [2021-08-13 18:26:40,499 INFO L132 encePairwiseOnDemand]: 22/31 looper letters, 3 selfloop transitions, 8 changer transitions 35/69 dead transitions. [2021-08-13 18:26:40,499 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 474 flow [2021-08-13 18:26:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-13 18:26:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-08-13 18:26:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2021-08-13 18:26:40,501 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7921146953405018 [2021-08-13 18:26:40,501 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 221 transitions. [2021-08-13 18:26:40,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 221 transitions. [2021-08-13 18:26:40,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 18:26:40,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 221 transitions. [2021-08-13 18:26:40,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 24.555555555555557) internal successors, (221), 9 states have internal predecessors, (221), 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 18:26:40,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 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 18:26:40,503 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 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 18:26:40,503 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 37 predicate places. [2021-08-13 18:26:40,503 INFO L482 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 474 flow [2021-08-13 18:26:40,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 18:26:40,504 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 18:26:40,504 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 18:26:40,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-13 18:26:40,504 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 18:26:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 18:26:40,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2101371950, now seen corresponding path program 8 times [2021-08-13 18:26:40,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 18:26:40,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22545208] [2021-08-13 18:26:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 18:26:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 18:26:40,566 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,566 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-08-13 18:26:40,579 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 18:26:40,614 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,614 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 18:26:40,616 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,617 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-08-13 18:26:40,633 INFO L142 QuantifierPusher]: treesize reduction 5, result has 66.7 percent of original size [2021-08-13 18:26:40,633 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 18:26:40,652 INFO L142 QuantifierPusher]: treesize reduction 6, result has 66.7 percent of original size [2021-08-13 18:26:40,653 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-08-13 18:26:40,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 18:26:40,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 18:26:40,667 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 18:26:40,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 18:26:40,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22545208] [2021-08-13 18:26:40,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22545208] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 18:26:40,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 18:26:40,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 18:26:40,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113260384] [2021-08-13 18:26:40,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 18:26:40,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 18:26:40,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 18:26:40,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-13 18:26:40,670 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 31 [2021-08-13 18:26:40,671 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 474 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 18:26:40,671 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 18:26:40,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 31 [2021-08-13 18:26:40,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 18:26:40,739 INFO L129 PetriNetUnfolder]: 16/125 cut-off events. [2021-08-13 18:26:40,739 INFO L130 PetriNetUnfolder]: For 155/173 co-relation queries the response was YES. [2021-08-13 18:26:40,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 125 events. 16/125 cut-off events. For 155/173 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 544 event pairs, 3 based on Foata normal form. 3/126 useless extension candidates. Maximal degree in co-relation 414. Up to 40 conditions per place. [2021-08-13 18:26:40,741 INFO L132 encePairwiseOnDemand]: 22/31 looper letters, 0 selfloop transitions, 0 changer transitions 61/61 dead transitions. [2021-08-13 18:26:40,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 61 transitions, 514 flow [2021-08-13 18:26:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-13 18:26:40,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-08-13 18:26:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2021-08-13 18:26:40,743 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8110599078341014 [2021-08-13 18:26:40,743 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 176 transitions. [2021-08-13 18:26:40,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 176 transitions. [2021-08-13 18:26:40,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 18:26:40,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 176 transitions. [2021-08-13 18:26:40,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 18:26:40,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 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 18:26:40,746 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 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 18:26:40,746 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2021-08-13 18:26:40,747 INFO L482 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 514 flow [2021-08-13 18:26:40,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 18:26:40,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown