/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/collitem-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 05:46:23,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 05:46:23,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 05:46:23,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 05:46:23,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 05:46:23,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 05:46:23,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 05:46:23,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 05:46:23,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 05:46:23,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 05:46:23,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 05:46:23,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 05:46:23,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 05:46:23,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 05:46:23,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 05:46:23,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 05:46:23,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 05:46:23,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 05:46:23,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 05:46:23,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 05:46:23,473 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 05:46:23,493 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 05:46:23,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 05:46:23,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 05:46:23,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 05:46:23,494 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 05:46:23,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 05:46:23,495 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 05:46:23,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 05:46:23,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 05:46:23,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 05:46:23,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 05:46:23,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 05:46:23,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 05:46:23,495 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 05:46:23,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 05:46:23,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 05:46:23,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 05:46:23,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 05:46:23,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 05:46:23,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 05:46:23,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 05:46:23,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 05:46:23,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 05:46:23,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 05:46:23,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 05:46:23,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 05:46:23,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 05:46:23,497 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 05:46:23,497 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 05:46:23,497 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 05:46:23,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 05:46:23,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 05:46:23,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 05:46:23,735 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 05:46:23,739 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 05:46:23,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-subst.wvr.bpl [2021-03-11 05:46:23,740 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-subst.wvr.bpl' [2021-03-11 05:46:23,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 05:46:23,768 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 05:46:23,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 05:46:23,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 05:46:23,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 05:46:23,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:23" (1/1) ... [2021-03-11 05:46:23,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:23" (1/1) ... [2021-03-11 05:46:23,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 05:46:23,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 05:46:23,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 05:46:23,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 05:46:23,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:23" (1/1) ... [2021-03-11 05:46:23,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:23" (1/1) ... [2021-03-11 05:46:23,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:23" (1/1) ... [2021-03-11 05:46:23,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:23" (1/1) ... [2021-03-11 05:46:23,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:23" (1/1) ... [2021-03-11 05:46:23,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:23" (1/1) ... [2021-03-11 05:46:23,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:23" (1/1) ... [2021-03-11 05:46:23,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 05:46:23,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 05:46:23,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 05:46:23,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 05:46:23,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:23" (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 05:46:23,860 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 05:46:23,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 05:46:23,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 05:46:23,861 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 05:46:23,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 05:46:23,862 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 05:46:23,862 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 05:46:23,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 05:46:23,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 05:46:23,862 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 05:46:23,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 05:46:23,862 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 05:46:23,863 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 05:46:24,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 05:46:24,094 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 05:46:24,095 INFO L202 PluginConnector]: Adding new model collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 05:46:24 BoogieIcfgContainer [2021-03-11 05:46:24,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 05:46:24,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 05:46:24,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 05:46:24,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 05:46:24,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:23" (1/2) ... [2021-03-11 05:46:24,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ada67d and model type collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 05:46:24, skipping insertion in model container [2021-03-11 05:46:24,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 05:46:24" (2/2) ... [2021-03-11 05:46:24,099 INFO L111 eAbstractionObserver]: Analyzing ICFG collitem-subst.wvr.bpl [2021-03-11 05:46:24,102 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 05:46:24,104 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 05:46:24,104 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 05:46:24,124 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 05:46:24,134 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 05:46:24,146 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 05:46:24,146 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 05:46:24,146 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 05:46:24,146 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 05:46:24,147 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 05:46:24,147 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 05:46:24,147 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 05:46:24,147 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 05:46:24,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-03-11 05:46:24,167 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 05:46:24,167 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 05:46:24,168 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 05:46:24,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-03-11 05:46:24,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-03-11 05:46:24,186 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-11 05:46:24,186 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 05:46:24,186 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:46:24,186 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:46:24,187 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:46:24,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:46:24,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1529605242, now seen corresponding path program 1 times [2021-03-11 05:46:24,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:46:24,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640051265] [2021-03-11 05:46:24,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:46:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:46:24,452 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:24,452 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:24,635 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 212 [2021-03-11 05:46:24,643 INFO L142 QuantifierPusher]: treesize reduction 7093, result has 16.2 percent of original size [2021-03-11 05:46:24,663 INFO L147 QuantifierPusher]: treesize reduction 296, result has 78.4 percent of original size 1072 [2021-03-11 05:46:25,087 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 49 [2021-03-11 05:46:25,103 INFO L142 QuantifierPusher]: treesize reduction 694, result has 47.5 percent of original size [2021-03-11 05:46:25,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 629 [2021-03-11 05:46:25,409 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 86 [2021-03-11 05:46:25,414 INFO L142 QuantifierPusher]: treesize reduction 238, result has 40.4 percent of original size [2021-03-11 05:46:25,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-03-11 05:46:25,512 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:25,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:25,514 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 05:46:25,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640051265] [2021-03-11 05:46:25,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:46:25,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 05:46:25,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297231841] [2021-03-11 05:46:25,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 05:46:25,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:46:25,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 05:46:25,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 05:46:25,535 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 05:46:25,537 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 05:46:25,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:46:25,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 05:46:25,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:46:25,711 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-03-11 05:46:25,864 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-03-11 05:46:25,875 INFO L129 PetriNetUnfolder]: 3/39 cut-off events. [2021-03-11 05:46:25,875 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-03-11 05:46:25,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 39 events. 3/39 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 115 event pairs, 1 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 48. Up to 7 conditions per place. [2021-03-11 05:46:25,877 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 1/18 dead transitions. [2021-03-11 05:46:25,877 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 70 flow [2021-03-11 05:46:25,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 05:46:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 05:46:25,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 05:46:25,884 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-03-11 05:46:25,884 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 05:46:25,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 05:46:25,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:46:25,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 05:46:25,887 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 05:46:25,890 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 05:46:25,890 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 05:46:25,891 INFO L185 Difference]: Start difference. First operand has 24 places, 14 transitions, 46 flow. Second operand 5 states and 79 transitions. [2021-03-11 05:46:25,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 70 flow [2021-03-11 05:46:25,893 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 05:46:25,894 INFO L241 Difference]: Finished difference. Result has 25 places, 15 transitions, 49 flow [2021-03-11 05:46:25,895 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 05:46:25,895 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-03-11 05:46:25,895 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 49 flow [2021-03-11 05:46:25,896 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 05:46:25,896 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:46:25,896 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:46:25,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 05:46:25,896 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:46:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:46:25,897 INFO L82 PathProgramCache]: Analyzing trace with hash 87231794, now seen corresponding path program 2 times [2021-03-11 05:46:25,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:46:25,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899654161] [2021-03-11 05:46:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:46:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:46:26,013 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:26,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:26,482 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 208 [2021-03-11 05:46:26,483 INFO L142 QuantifierPusher]: treesize reduction 99156, result has 10.7 percent of original size [2021-03-11 05:46:26,525 INFO L147 QuantifierPusher]: treesize reduction 8276, result has 30.4 percent of original size 3610 [2021-03-11 05:46:27,017 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 45 [2021-03-11 05:46:27,214 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 124 [2021-03-11 05:46:27,216 INFO L142 QuantifierPusher]: treesize reduction 44606, result has 5.2 percent of original size [2021-03-11 05:46:27,227 INFO L147 QuantifierPusher]: treesize reduction 1294, result has 47.1 percent of original size 1150 [2021-03-11 05:46:27,780 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 65 [2021-03-11 05:46:27,783 INFO L142 QuantifierPusher]: treesize reduction 638, result has 7.4 percent of original size [2021-03-11 05:46:27,784 INFO L147 QuantifierPusher]: treesize reduction 10, result has 80.4 percent of original size 41 [2021-03-11 05:46:27,818 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:27,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:27,819 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 05:46:27,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899654161] [2021-03-11 05:46:27,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:46:27,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 05:46:27,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003693253] [2021-03-11 05:46:27,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 05:46:27,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:46:27,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 05:46:27,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 05:46:27,821 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 05:46:27,822 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 05:46:27,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:46:27,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 05:46:27,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:46:27,952 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-11 05:46:28,103 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-03-11 05:46:28,119 INFO L129 PetriNetUnfolder]: 1/46 cut-off events. [2021-03-11 05:46:28,119 INFO L130 PetriNetUnfolder]: For 25/28 co-relation queries the response was YES. [2021-03-11 05:46:28,119 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 46 events. 1/46 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 177 event pairs, 1 based on Foata normal form. 1/45 useless extension candidates. Maximal degree in co-relation 71. Up to 8 conditions per place. [2021-03-11 05:46:28,119 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 1/19 dead transitions. [2021-03-11 05:46:28,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 19 transitions, 85 flow [2021-03-11 05:46:28,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 05:46:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 05:46:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 05:46:28,120 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-03-11 05:46:28,120 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 05:46:28,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 05:46:28,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:46:28,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 05:46:28,121 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 05:46:28,122 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 05:46:28,122 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 05:46:28,122 INFO L185 Difference]: Start difference. First operand has 25 places, 15 transitions, 49 flow. Second operand 5 states and 79 transitions. [2021-03-11 05:46:28,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 19 transitions, 85 flow [2021-03-11 05:46:28,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 19 transitions, 78 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-11 05:46:28,123 INFO L241 Difference]: Finished difference. Result has 29 places, 16 transitions, 66 flow [2021-03-11 05:46:28,123 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=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=66, PETRI_PLACES=29, PETRI_TRANSITIONS=16} [2021-03-11 05:46:28,124 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-03-11 05:46:28,124 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 16 transitions, 66 flow [2021-03-11 05:46:28,124 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 05:46:28,124 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:46:28,124 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:46:28,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 05:46:28,124 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:46:28,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:46:28,125 INFO L82 PathProgramCache]: Analyzing trace with hash 37535172, now seen corresponding path program 3 times [2021-03-11 05:46:28,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:46:28,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380069760] [2021-03-11 05:46:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:46:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:46:28,188 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:28,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:28,196 INFO L142 QuantifierPusher]: treesize reduction 3302, result has 4.3 percent of original size [2021-03-11 05:46:28,197 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 150 [2021-03-11 05:46:28,274 INFO L142 QuantifierPusher]: treesize reduction 377, result has 54.2 percent of original size [2021-03-11 05:46:28,276 INFO L147 QuantifierPusher]: treesize reduction 32, result has 92.8 percent of original size 415 [2021-03-11 05:46:28,535 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2021-03-11 05:46:28,546 INFO L142 QuantifierPusher]: treesize reduction 90, result has 53.4 percent of original size [2021-03-11 05:46:28,547 INFO L147 QuantifierPusher]: treesize reduction 7, result has 93.2 percent of original size 96 [2021-03-11 05:46:28,644 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:28,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:28,645 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 05:46:28,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380069760] [2021-03-11 05:46:28,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:46:28,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 05:46:28,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157906407] [2021-03-11 05:46:28,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 05:46:28,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:46:28,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 05:46:28,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 05:46:28,648 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 05:46:28,648 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 16 transitions, 66 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 05:46:28,648 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:46:28,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 05:46:28,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:46:28,792 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-11 05:46:28,956 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-11 05:46:28,967 INFO L129 PetriNetUnfolder]: 1/41 cut-off events. [2021-03-11 05:46:28,967 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-03-11 05:46:28,968 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 41 events. 1/41 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 147 event pairs, 0 based on Foata normal form. 1/41 useless extension candidates. Maximal degree in co-relation 80. Up to 6 conditions per place. [2021-03-11 05:46:28,968 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 3/21 dead transitions. [2021-03-11 05:46:28,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 21 transitions, 120 flow [2021-03-11 05:46:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 05:46:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 05:46:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 05:46:28,969 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-03-11 05:46:28,969 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 05:46:28,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 05:46:28,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:46:28,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 05:46:28,971 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 05:46:28,971 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 05:46:28,971 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 05:46:28,971 INFO L185 Difference]: Start difference. First operand has 29 places, 16 transitions, 66 flow. Second operand 5 states and 79 transitions. [2021-03-11 05:46:28,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 21 transitions, 120 flow [2021-03-11 05:46:28,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 21 transitions, 110 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-11 05:46:28,974 INFO L241 Difference]: Finished difference. Result has 33 places, 16 transitions, 76 flow [2021-03-11 05:46:28,974 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=16} [2021-03-11 05:46:28,974 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 9 predicate places. [2021-03-11 05:46:28,974 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 16 transitions, 76 flow [2021-03-11 05:46:28,974 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 05:46:28,974 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:46:28,974 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:46:28,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 05:46:28,974 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:46:28,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:46:28,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1914605312, now seen corresponding path program 4 times [2021-03-11 05:46:28,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:46:28,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675442935] [2021-03-11 05:46:28,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:46:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:46:29,045 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:29,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:29,107 INFO L142 QuantifierPusher]: treesize reduction 5863, result has 32.0 percent of original size [2021-03-11 05:46:29,116 INFO L147 QuantifierPusher]: treesize reduction 386, result has 86.0 percent of original size 2371 [2021-03-11 05:46:29,543 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 47 [2021-03-11 05:46:29,554 INFO L142 QuantifierPusher]: treesize reduction 1011, result has 34.1 percent of original size [2021-03-11 05:46:29,556 INFO L147 QuantifierPusher]: treesize reduction 51, result has 90.3 percent of original size 473 [2021-03-11 05:46:29,898 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 71 [2021-03-11 05:46:29,899 INFO L142 QuantifierPusher]: treesize reduction 58, result has 48.7 percent of original size [2021-03-11 05:46:29,900 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-03-11 05:46:29,931 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:29,932 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:29,932 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 05:46:29,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675442935] [2021-03-11 05:46:29,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:46:29,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 05:46:29,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119566019] [2021-03-11 05:46:29,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 05:46:29,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:46:29,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 05:46:29,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 05:46:29,934 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 05:46:29,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 16 transitions, 76 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 05:46:29,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:46:29,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 05:46:29,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:46:30,189 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 100 [2021-03-11 05:46:30,469 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 113 [2021-03-11 05:46:30,486 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-03-11 05:46:30,486 INFO L130 PetriNetUnfolder]: For 70/76 co-relation queries the response was YES. [2021-03-11 05:46:30,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 38 events. 0/38 cut-off events. For 70/76 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 116 event pairs, 0 based on Foata normal form. 1/37 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-11 05:46:30,486 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 3/20 dead transitions. [2021-03-11 05:46:30,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 20 transitions, 130 flow [2021-03-11 05:46:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 05:46:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 05:46:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-03-11 05:46:30,487 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-03-11 05:46:30,487 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-03-11 05:46:30,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-03-11 05:46:30,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:46:30,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-03-11 05:46:30,488 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 05:46:30,489 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 05:46:30,489 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 05:46:30,489 INFO L185 Difference]: Start difference. First operand has 33 places, 16 transitions, 76 flow. Second operand 5 states and 79 transitions. [2021-03-11 05:46:30,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 20 transitions, 130 flow [2021-03-11 05:46:30,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 112 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-03-11 05:46:30,490 INFO L241 Difference]: Finished difference. Result has 35 places, 16 transitions, 79 flow [2021-03-11 05:46:30,490 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=79, PETRI_PLACES=35, PETRI_TRANSITIONS=16} [2021-03-11 05:46:30,490 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 11 predicate places. [2021-03-11 05:46:30,491 INFO L480 AbstractCegarLoop]: Abstraction has has 35 places, 16 transitions, 79 flow [2021-03-11 05:46:30,491 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 05:46:30,491 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:46:30,491 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:46:30,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 05:46:30,491 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:46:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:46:30,491 INFO L82 PathProgramCache]: Analyzing trace with hash 927377144, now seen corresponding path program 5 times [2021-03-11 05:46:30,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:46:30,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461001264] [2021-03-11 05:46:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:46:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:46:30,554 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:30,555 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:30,558 INFO L142 QuantifierPusher]: treesize reduction 578, result has 24.3 percent of original size [2021-03-11 05:46:30,559 INFO L147 QuantifierPusher]: treesize reduction 11, result has 94.1 percent of original size 175 [2021-03-11 05:46:30,666 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2021-03-11 05:46:30,677 INFO L142 QuantifierPusher]: treesize reduction 1337, result has 28.7 percent of original size [2021-03-11 05:46:30,685 INFO L147 QuantifierPusher]: treesize reduction 91, result has 83.1 percent of original size 447 [2021-03-11 05:46:30,913 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 66 [2021-03-11 05:46:30,915 INFO L142 QuantifierPusher]: treesize reduction 11, result has 86.7 percent of original size [2021-03-11 05:46:30,923 INFO L147 QuantifierPusher]: treesize reduction 13, result has 81.9 percent of original size 59 [2021-03-11 05:46:30,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:30,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:30,960 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 05:46:30,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461001264] [2021-03-11 05:46:30,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:46:30,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 05:46:30,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465701391] [2021-03-11 05:46:30,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 05:46:30,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:46:30,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 05:46:30,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 05:46:30,962 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 05:46:30,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 16 transitions, 79 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 05:46:30,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:46:30,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 05:46:30,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:46:31,209 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-03-11 05:46:31,217 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-03-11 05:46:31,217 INFO L130 PetriNetUnfolder]: For 56/62 co-relation queries the response was YES. [2021-03-11 05:46:31,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 25 events. 0/25 cut-off events. For 56/62 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 45 event pairs, 0 based on Foata normal form. 1/25 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-11 05:46:31,217 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 3/17 dead transitions. [2021-03-11 05:46:31,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 17 transitions, 102 flow [2021-03-11 05:46:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 05:46:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 05:46:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-03-11 05:46:31,219 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8105263157894737 [2021-03-11 05:46:31,219 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-03-11 05:46:31,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-03-11 05:46:31,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:46:31,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-03-11 05:46:31,220 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 05:46:31,220 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 05:46:31,220 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 05:46:31,221 INFO L185 Difference]: Start difference. First operand has 35 places, 16 transitions, 79 flow. Second operand 5 states and 77 transitions. [2021-03-11 05:46:31,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 17 transitions, 102 flow [2021-03-11 05:46:31,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 17 transitions, 90 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-03-11 05:46:31,222 INFO L241 Difference]: Finished difference. Result has 36 places, 14 transitions, 59 flow [2021-03-11 05:46:31,222 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=59, PETRI_PLACES=36, PETRI_TRANSITIONS=14} [2021-03-11 05:46:31,222 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 12 predicate places. [2021-03-11 05:46:31,222 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 14 transitions, 59 flow [2021-03-11 05:46:31,222 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 05:46:31,222 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:46:31,222 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:46:31,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 05:46:31,222 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:46:31,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:46:31,223 INFO L82 PathProgramCache]: Analyzing trace with hash 213185016, now seen corresponding path program 6 times [2021-03-11 05:46:31,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:46:31,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274291279] [2021-03-11 05:46:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:46:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:46:31,317 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:31,317 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:32,113 WARN L205 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 358 [2021-03-11 05:46:32,114 INFO L142 QuantifierPusher]: treesize reduction 246688, result has 8.9 percent of original size [2021-03-11 05:46:32,193 INFO L147 QuantifierPusher]: treesize reduction 11029, result has 54.1 percent of original size 12987 [2021-03-11 05:46:33,068 WARN L205 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 48 [2021-03-11 05:46:33,097 INFO L142 QuantifierPusher]: treesize reduction 3063, result has 13.9 percent of original size [2021-03-11 05:46:33,100 INFO L147 QuantifierPusher]: treesize reduction 79, result has 84.0 percent of original size 415 [2021-03-11 05:46:33,208 INFO L142 QuantifierPusher]: treesize reduction 782, result has 13.8 percent of original size [2021-03-11 05:46:33,209 INFO L147 QuantifierPusher]: treesize reduction 8, result has 93.6 percent of original size 117 [2021-03-11 05:46:33,293 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:33,294 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:33,294 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 05:46:33,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274291279] [2021-03-11 05:46:33,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:46:33,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 05:46:33,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308844000] [2021-03-11 05:46:33,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 05:46:33,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:46:33,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 05:46:33,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 05:46:33,295 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-03-11 05:46:33,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 14 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 05:46:33,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:46:33,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-03-11 05:46:33,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:46:33,465 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-11 05:46:33,466 INFO L130 PetriNetUnfolder]: For 25/27 co-relation queries the response was YES. [2021-03-11 05:46:33,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 14 events. 0/14 cut-off events. For 25/27 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-11 05:46:33,466 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-03-11 05:46:33,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 13 transitions, 69 flow [2021-03-11 05:46:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 05:46:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 05:46:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-03-11 05:46:33,467 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2021-03-11 05:46:33,467 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-03-11 05:46:33,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-03-11 05:46:33,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:46:33,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-03-11 05:46:33,467 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 05:46:33,468 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 05:46:33,468 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 05:46:33,468 INFO L185 Difference]: Start difference. First operand has 36 places, 14 transitions, 59 flow. Second operand 5 states and 75 transitions. [2021-03-11 05:46:33,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 13 transitions, 69 flow [2021-03-11 05:46:33,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 13 transitions, 51 flow, removed 3 selfloop flow, removed 7 redundant places. [2021-03-11 05:46:33,479 INFO L241 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2021-03-11 05:46:33,481 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 05:46:33,482 INFO L335 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2021-03-11 05:46:33,482 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2021-03-11 05:46:33,482 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 05:46:33,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 05:46:33,485 INFO L202 PluginConnector]: Adding new model collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 05:46:33 BasicIcfg [2021-03-11 05:46:33,485 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 05:46:33,486 INFO L168 Benchmark]: Toolchain (without parser) took 9720.85 ms. Allocated memory was 255.9 MB in the beginning and 627.0 MB in the end (delta: 371.2 MB). Free memory was 236.8 MB in the beginning and 488.5 MB in the end (delta: -251.7 MB). Peak memory consumption was 119.6 MB. Max. memory is 16.0 GB. [2021-03-11 05:46:33,486 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory was 238.0 MB in the beginning and 238.0 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 05:46:33,487 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.09 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 05:46:33,487 INFO L168 Benchmark]: Boogie Preprocessor took 13.86 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 965.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 05:46:33,487 INFO L168 Benchmark]: RCFGBuilder took 293.19 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 233.1 MB in the end (delta: 656.8 kB). Peak memory consumption was 24.1 MB. Max. memory is 16.0 GB. [2021-03-11 05:46:33,487 INFO L168 Benchmark]: TraceAbstraction took 9389.79 ms. Allocated memory was 255.9 MB in the beginning and 627.0 MB in the end (delta: 371.2 MB). Free memory was 232.5 MB in the beginning and 488.5 MB in the end (delta: -256.1 MB). Peak memory consumption was 114.4 MB. Max. memory is 16.0 GB. [2021-03-11 05:46:33,489 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 238.0 MB in the beginning and 238.0 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.09 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.86 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 965.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 293.19 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 233.1 MB in the end (delta: 656.8 kB). Peak memory consumption was 24.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 9389.79 ms. Allocated memory was 255.9 MB in the beginning and 627.0 MB in the end (delta: 371.2 MB). Free memory was 232.5 MB in the beginning and 488.5 MB in the end (delta: -256.1 MB). Peak memory consumption was 114.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 68]: 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: 9.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 9338.6ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 2001.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 28 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 107.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6289.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=4, 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: 9.2ms SsaConstructionTime, 132.9ms SatisfiabilityAnalysisTime, 7070.2ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 4363 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...