/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 06:02:57,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 06:02:57,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 06:02:57,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 06:02:57,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 06:02:57,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 06:02:57,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 06:02:57,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 06:02:57,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 06:02:57,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 06:02:57,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 06:02:57,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 06:02:57,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 06:02:57,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 06:02:57,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 06:02:57,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 06:02:57,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 06:02:57,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 06:02:57,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 06:02:57,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 06:02:57,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-03-11 06:02:57,450 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 06:02:57,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 06:02:57,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 06:02:57,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 06:02:57,455 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 06:02:57,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 06:02:57,455 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 06:02:57,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 06:02:57,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 06:02:57,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 06:02:57,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 06:02:57,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 06:02:57,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 06:02:57,457 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 06:02:57,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 06:02:57,457 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 06:02:57,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 06:02:57,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 06:02:57,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 06:02:57,458 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 06:02:57,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 06:02:57,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 06:02:57,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 06:02:57,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 06:02:57,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 06:02:57,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 06:02:57,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 06:02:57,459 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 06:02:57,459 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 06:02:57,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 06:02:57,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 06:02:57,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 06:02:57,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 06:02:57,748 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 06:02:57,749 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 06:02:57,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-subst.wvr.bpl [2021-03-11 06:02:57,750 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-subst.wvr.bpl' [2021-03-11 06:02:57,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 06:02:57,786 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 06:02:57,787 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 06:02:57,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 06:02:57,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 06:02:57,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:02:57" (1/1) ... [2021-03-11 06:02:57,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:02:57" (1/1) ... [2021-03-11 06:02:57,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 06:02:57,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 06:02:57,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 06:02:57,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 06:02:57,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:02:57" (1/1) ... [2021-03-11 06:02:57,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:02:57" (1/1) ... [2021-03-11 06:02:57,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:02:57" (1/1) ... [2021-03-11 06:02:57,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:02:57" (1/1) ... [2021-03-11 06:02:57,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:02:57" (1/1) ... [2021-03-11 06:02:57,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:02:57" (1/1) ... [2021-03-11 06:02:57,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:02:57" (1/1) ... [2021-03-11 06:02:57,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 06:02:57,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 06:02:57,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 06:02:57,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 06:02:57,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:02:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 06:02:57,889 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 06:02:57,889 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 06:02:57,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 06:02:57,891 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 06:02:57,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 06:02:57,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 06:02:57,892 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 06:02:57,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 06:02:57,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 06:02:57,892 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 06:02:57,892 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 06:02:57,892 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 06:02:57,893 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 06:02:58,073 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 06:02:58,074 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 06:02:58,076 INFO L202 PluginConnector]: Adding new model simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 06:02:58 BoogieIcfgContainer [2021-03-11 06:02:58,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 06:02:58,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 06:02:58,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 06:02:58,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 06:02:58,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:02:57" (1/2) ... [2021-03-11 06:02:58,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ddd737 and model type simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 06:02:58, skipping insertion in model container [2021-03-11 06:02:58,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 06:02:58" (2/2) ... [2021-03-11 06:02:58,087 INFO L111 eAbstractionObserver]: Analyzing ICFG simpl-str-subst.wvr.bpl [2021-03-11 06:02:58,092 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 06:02:58,096 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 06:02:58,097 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 06:02:58,187 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 06:02:58,202 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 06:02:58,236 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 06:02:58,237 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 06:02:58,237 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 06:02:58,237 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 06:02:58,237 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 06:02:58,237 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 06:02:58,237 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 06:02:58,237 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 06:02:58,245 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-03-11 06:02:58,262 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 06:02:58,262 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 06:02:58,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 16 events. 0/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 06:02:58,264 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-03-11 06:02:58,267 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-03-11 06:02:58,273 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-11 06:02:58,273 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 06:02:58,273 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:02:58,274 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:02:58,274 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:02:58,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:02:58,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1083414440, now seen corresponding path program 1 times [2021-03-11 06:02:58,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:02:58,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074195704] [2021-03-11 06:02:58,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:02:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:02:58,636 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:02:58,636 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:02:58,656 INFO L142 QuantifierPusher]: treesize reduction 186, result has 27.3 percent of original size [2021-03-11 06:02:58,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-03-11 06:02:58,737 INFO L142 QuantifierPusher]: treesize reduction 198, result has 34.2 percent of original size [2021-03-11 06:02:58,740 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-03-11 06:02:58,865 INFO L142 QuantifierPusher]: treesize reduction 115, result has 49.1 percent of original size [2021-03-11 06:02:58,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-03-11 06:02:58,920 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:02:58,921 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:02:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:02:58,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074195704] [2021-03-11 06:02:58,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:02:58,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:02:58,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266472389] [2021-03-11 06:02:58,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 06:02:58,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:02:58,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 06:02:58,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 06:02:58,959 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 06:02:58,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 14 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:02:58,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:02:58,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 06:02:58,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:02:59,136 INFO L129 PetriNetUnfolder]: 3/40 cut-off events. [2021-03-11 06:02:59,137 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-03-11 06:02:59,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 40 events. 3/40 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 120 event pairs, 1 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 50. Up to 7 conditions per place. [2021-03-11 06:02:59,140 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 1/18 dead transitions. [2021-03-11 06:02:59,140 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 70 flow [2021-03-11 06:02:59,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:02:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:02:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 06:02:59,150 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-03-11 06:02:59,151 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 06:02:59,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 06:02:59,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:02:59,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 06:02:59,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:02:59,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:02:59,158 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:02:59,159 INFO L185 Difference]: Start difference. First operand has 24 places, 14 transitions, 46 flow. Second operand 5 states and 79 transitions. [2021-03-11 06:02:59,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 70 flow [2021-03-11 06:02:59,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 58 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-11 06:02:59,163 INFO L241 Difference]: Finished difference. Result has 25 places, 15 transitions, 49 flow [2021-03-11 06:02:59,165 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=25, PETRI_TRANSITIONS=15} [2021-03-11 06:02:59,165 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-03-11 06:02:59,166 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 49 flow [2021-03-11 06:02:59,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:02:59,166 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:02:59,166 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:02:59,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 06:02:59,166 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:02:59,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:02:59,167 INFO L82 PathProgramCache]: Analyzing trace with hash -207894312, now seen corresponding path program 2 times [2021-03-11 06:02:59,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:02:59,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597599985] [2021-03-11 06:02:59,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:02:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:02:59,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:02:59,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:02:59,232 INFO L142 QuantifierPusher]: treesize reduction 39, result has 56.7 percent of original size [2021-03-11 06:02:59,234 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-03-11 06:02:59,273 INFO L142 QuantifierPusher]: treesize reduction 56, result has 59.4 percent of original size [2021-03-11 06:02:59,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-03-11 06:02:59,398 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-11 06:02:59,407 INFO L142 QuantifierPusher]: treesize reduction 90, result has 36.2 percent of original size [2021-03-11 06:02:59,409 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-03-11 06:02:59,438 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:02:59,438 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:02:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:02:59,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597599985] [2021-03-11 06:02:59,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:02:59,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:02:59,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934493862] [2021-03-11 06:02:59,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 06:02:59,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:02:59,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 06:02:59,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 06:02:59,449 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 06:02:59,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 15 transitions, 49 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:02:59,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:02:59,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 06:02:59,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:02:59,599 INFO L129 PetriNetUnfolder]: 2/41 cut-off events. [2021-03-11 06:02:59,599 INFO L130 PetriNetUnfolder]: For 24/27 co-relation queries the response was YES. [2021-03-11 06:02:59,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 41 events. 2/41 cut-off events. For 24/27 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 136 event pairs, 0 based on Foata normal form. 1/40 useless extension candidates. Maximal degree in co-relation 68. Up to 7 conditions per place. [2021-03-11 06:02:59,600 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 3/20 dead transitions. [2021-03-11 06:02:59,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 93 flow [2021-03-11 06:02:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:02:59,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:02:59,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 06:02:59,601 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-03-11 06:02:59,602 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 06:02:59,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 06:02:59,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:02:59,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 06:02:59,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:02:59,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:02:59,604 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:02:59,604 INFO L185 Difference]: Start difference. First operand has 25 places, 15 transitions, 49 flow. Second operand 5 states and 79 transitions. [2021-03-11 06:02:59,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 93 flow [2021-03-11 06:02:59,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 20 transitions, 86 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-11 06:02:59,605 INFO L241 Difference]: Finished difference. Result has 29 places, 15 transitions, 59 flow [2021-03-11 06:02:59,606 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=59, PETRI_PLACES=29, PETRI_TRANSITIONS=15} [2021-03-11 06:02:59,606 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-03-11 06:02:59,606 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 15 transitions, 59 flow [2021-03-11 06:02:59,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:02:59,607 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:02:59,607 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:02:59,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 06:02:59,607 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:02:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:02:59,608 INFO L82 PathProgramCache]: Analyzing trace with hash 816644350, now seen corresponding path program 3 times [2021-03-11 06:02:59,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:02:59,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549395234] [2021-03-11 06:02:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:02:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:02:59,656 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:02:59,656 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:02:59,658 INFO L142 QuantifierPusher]: treesize reduction 61, result has 47.0 percent of original size [2021-03-11 06:02:59,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-03-11 06:02:59,700 INFO L142 QuantifierPusher]: treesize reduction 11, result has 91.4 percent of original size [2021-03-11 06:02:59,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-03-11 06:02:59,796 INFO L142 QuantifierPusher]: treesize reduction 106, result has 39.4 percent of original size [2021-03-11 06:02:59,798 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-03-11 06:02:59,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:02:59,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:02:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:02:59,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549395234] [2021-03-11 06:02:59,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:02:59,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:02:59,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350371286] [2021-03-11 06:02:59,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 06:02:59,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:02:59,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 06:02:59,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 06:02:59,849 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 06:02:59,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 15 transitions, 59 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:02:59,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:02:59,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 06:02:59,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:03:00,030 INFO L129 PetriNetUnfolder]: 1/34 cut-off events. [2021-03-11 06:03:00,030 INFO L130 PetriNetUnfolder]: For 42/45 co-relation queries the response was YES. [2021-03-11 06:03:00,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 34 events. 1/34 cut-off events. For 42/45 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 95 event pairs, 1 based on Foata normal form. 1/34 useless extension candidates. Maximal degree in co-relation 65. Up to 5 conditions per place. [2021-03-11 06:03:00,030 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 1/19 dead transitions. [2021-03-11 06:03:00,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 19 transitions, 100 flow [2021-03-11 06:03:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:03:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:03:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 06:03:00,033 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-03-11 06:03:00,033 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 06:03:00,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 06:03:00,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:03:00,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 06:03:00,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:00,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:00,037 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:00,037 INFO L185 Difference]: Start difference. First operand has 29 places, 15 transitions, 59 flow. Second operand 5 states and 79 transitions. [2021-03-11 06:03:00,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 19 transitions, 100 flow [2021-03-11 06:03:00,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 82 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-03-11 06:03:00,040 INFO L241 Difference]: Finished difference. Result has 31 places, 16 transitions, 70 flow [2021-03-11 06:03:00,040 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=31, PETRI_TRANSITIONS=16} [2021-03-11 06:03:00,040 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 7 predicate places. [2021-03-11 06:03:00,040 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 16 transitions, 70 flow [2021-03-11 06:03:00,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:00,041 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:03:00,041 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:03:00,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 06:03:00,041 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:03:00,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:03:00,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1228119128, now seen corresponding path program 4 times [2021-03-11 06:03:00,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:03:00,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507949709] [2021-03-11 06:03:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:03:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:03:00,114 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:00,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:00,117 INFO L142 QuantifierPusher]: treesize reduction 30, result has 54.5 percent of original size [2021-03-11 06:03:00,118 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-03-11 06:03:00,142 INFO L142 QuantifierPusher]: treesize reduction 14, result has 82.1 percent of original size [2021-03-11 06:03:00,144 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-03-11 06:03:00,180 INFO L142 QuantifierPusher]: treesize reduction 32, result has 52.2 percent of original size [2021-03-11 06:03:00,181 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-03-11 06:03:00,201 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:00,201 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:03:00,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507949709] [2021-03-11 06:03:00,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:03:00,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:03:00,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073833320] [2021-03-11 06:03:00,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 06:03:00,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:03:00,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 06:03:00,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 06:03:00,206 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 06:03:00,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 16 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:00,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:03:00,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 06:03:00,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:03:00,351 INFO L129 PetriNetUnfolder]: 1/29 cut-off events. [2021-03-11 06:03:00,352 INFO L130 PetriNetUnfolder]: For 34/36 co-relation queries the response was YES. [2021-03-11 06:03:00,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 29 events. 1/29 cut-off events. For 34/36 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 73 event pairs, 1 based on Foata normal form. 1/30 useless extension candidates. Maximal degree in co-relation 63. Up to 5 conditions per place. [2021-03-11 06:03:00,352 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 4/18 dead transitions. [2021-03-11 06:03:00,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 18 transitions, 100 flow [2021-03-11 06:03:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:03:00,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:03:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2021-03-11 06:03:00,357 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8210526315789474 [2021-03-11 06:03:00,357 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2021-03-11 06:03:00,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2021-03-11 06:03:00,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:03:00,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2021-03-11 06:03:00,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:00,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:00,359 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:00,359 INFO L185 Difference]: Start difference. First operand has 31 places, 16 transitions, 70 flow. Second operand 5 states and 78 transitions. [2021-03-11 06:03:00,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 18 transitions, 100 flow [2021-03-11 06:03:00,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 18 transitions, 96 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-11 06:03:00,361 INFO L241 Difference]: Finished difference. Result has 34 places, 14 transitions, 57 flow [2021-03-11 06:03:00,361 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=57, PETRI_PLACES=34, PETRI_TRANSITIONS=14} [2021-03-11 06:03:00,361 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 10 predicate places. [2021-03-11 06:03:00,361 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 14 transitions, 57 flow [2021-03-11 06:03:00,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:00,361 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:03:00,361 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:03:00,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 06:03:00,362 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:03:00,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:03:00,362 INFO L82 PathProgramCache]: Analyzing trace with hash -456247892, now seen corresponding path program 5 times [2021-03-11 06:03:00,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:03:00,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289077715] [2021-03-11 06:03:00,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:03:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:03:00,450 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:00,453 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:00,457 INFO L142 QuantifierPusher]: treesize reduction 54, result has 63.3 percent of original size [2021-03-11 06:03:00,458 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-03-11 06:03:00,538 INFO L142 QuantifierPusher]: treesize reduction 114, result has 52.3 percent of original size [2021-03-11 06:03:00,541 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-03-11 06:03:00,674 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-11 06:03:00,680 INFO L142 QuantifierPusher]: treesize reduction 78, result has 42.6 percent of original size [2021-03-11 06:03:00,686 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-03-11 06:03:00,736 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:00,736 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:03:00,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289077715] [2021-03-11 06:03:00,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:03:00,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:03:00,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748287187] [2021-03-11 06:03:00,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 06:03:00,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:03:00,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 06:03:00,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 06:03:00,738 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 06:03:00,739 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 14 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:00,739 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:03:00,739 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 06:03:00,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:03:00,881 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-11 06:03:01,041 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-03-11 06:03:01,049 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-03-11 06:03:01,049 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-11 06:03:01,049 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 23 events. 0/23 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 1/24 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-11 06:03:01,049 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 2/16 dead transitions. [2021-03-11 06:03:01,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 16 transitions, 88 flow [2021-03-11 06:03:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:03:01,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:03:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-03-11 06:03:01,050 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8105263157894737 [2021-03-11 06:03:01,051 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-03-11 06:03:01,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-03-11 06:03:01,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:03:01,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-03-11 06:03:01,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:01,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:01,052 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:01,052 INFO L185 Difference]: Start difference. First operand has 34 places, 14 transitions, 57 flow. Second operand 5 states and 77 transitions. [2021-03-11 06:03:01,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 16 transitions, 88 flow [2021-03-11 06:03:01,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 16 transitions, 60 flow, removed 5 selfloop flow, removed 9 redundant places. [2021-03-11 06:03:01,053 INFO L241 Difference]: Finished difference. Result has 29 places, 14 transitions, 47 flow [2021-03-11 06:03:01,054 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=14} [2021-03-11 06:03:01,054 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-03-11 06:03:01,054 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 14 transitions, 47 flow [2021-03-11 06:03:01,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:01,054 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:03:01,054 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:03:01,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 06:03:01,054 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:03:01,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:03:01,055 INFO L82 PathProgramCache]: Analyzing trace with hash -523898182, now seen corresponding path program 6 times [2021-03-11 06:03:01,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:03:01,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195204296] [2021-03-11 06:03:01,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:03:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:03:01,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:01,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:01,094 INFO L142 QuantifierPusher]: treesize reduction 39, result has 56.7 percent of original size [2021-03-11 06:03:01,095 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-03-11 06:03:01,124 INFO L142 QuantifierPusher]: treesize reduction 83, result has 57.0 percent of original size [2021-03-11 06:03:01,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-03-11 06:03:01,226 INFO L142 QuantifierPusher]: treesize reduction 70, result has 50.7 percent of original size [2021-03-11 06:03:01,228 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-03-11 06:03:01,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:03:01,251 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:03:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:03:01,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195204296] [2021-03-11 06:03:01,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:03:01,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:03:01,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308516442] [2021-03-11 06:03:01,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 06:03:01,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:03:01,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 06:03:01,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 06:03:01,253 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 06:03:01,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 14 transitions, 47 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:01,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:03:01,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 06:03:01,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:03:01,395 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-11 06:03:01,524 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-11 06:03:01,525 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-11 06:03:01,525 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-11 06:03:01,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 14 events. 0/14 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 06:03:01,526 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-03-11 06:03:01,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 13 transitions, 55 flow [2021-03-11 06:03:01,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:03:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:03:01,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-03-11 06:03:01,527 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2021-03-11 06:03:01,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-03-11 06:03:01,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-03-11 06:03:01,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:03:01,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-03-11 06:03:01,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:01,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:01,528 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:01,528 INFO L185 Difference]: Start difference. First operand has 29 places, 14 transitions, 47 flow. Second operand 5 states and 75 transitions. [2021-03-11 06:03:01,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 13 transitions, 55 flow [2021-03-11 06:03:01,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 13 transitions, 51 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-11 06:03:01,529 INFO L241 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2021-03-11 06:03:01,529 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2021-03-11 06:03:01,529 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2021-03-11 06:03:01,529 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2021-03-11 06:03:01,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:03:01,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 06:03:01,533 INFO L202 PluginConnector]: Adding new model simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 06:03:01 BasicIcfg [2021-03-11 06:03:01,533 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 06:03:01,534 INFO L168 Benchmark]: Toolchain (without parser) took 3751.23 ms. Allocated memory was 255.9 MB in the beginning and 337.6 MB in the end (delta: 81.8 MB). Free memory was 236.6 MB in the beginning and 247.1 MB in the end (delta: -10.6 MB). Peak memory consumption was 69.5 MB. Max. memory is 16.0 GB. [2021-03-11 06:03:01,534 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 160.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 06:03:01,535 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.98 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 06:03:01,535 INFO L168 Benchmark]: Boogie Preprocessor took 13.09 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 826.2 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-03-11 06:03:01,535 INFO L168 Benchmark]: RCFGBuilder took 249.68 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 237.3 MB in the end (delta: -4.0 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.0 GB. [2021-03-11 06:03:01,536 INFO L168 Benchmark]: TraceAbstraction took 3454.64 ms. Allocated memory was 255.9 MB in the beginning and 337.6 MB in the end (delta: 81.8 MB). Free memory was 236.7 MB in the beginning and 247.1 MB in the end (delta: -10.5 MB). Peak memory consumption was 67.8 MB. Max. memory is 16.0 GB. [2021-03-11 06:03:01,538 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 160.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.98 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.09 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 826.2 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 249.68 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 237.3 MB in the end (delta: -4.0 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3454.64 ms. Allocated memory was 255.9 MB in the beginning and 337.6 MB in the end (delta: 81.8 MB). Free memory was 236.7 MB in the beginning and 247.1 MB in the end (delta: -10.5 MB). Peak memory consumption was 67.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 47]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3297.1ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1313.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 92 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 82.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2069.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=3, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 14.4ms SsaConstructionTime, 112.9ms SatisfiabilityAnalysisTime, 1655.7ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 1755 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...