/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-RepeatedVariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/spaghetti.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 08:20:31,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 08:20:31,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 08:20:31,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-25 08:20:31,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-25 08:20:31,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-25 08:20:31,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-25 08:20:31,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-25 08:20:31,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-25 08:20:31,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-25 08:20:31,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-25 08:20:31,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-25 08:20:31,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-25 08:20:31,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-25 08:20:31,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-25 08:20:31,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-25 08:20:31,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-25 08:20:31,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-25 08:20:31,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-25 08:20:31,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-25 08:20:31,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-25 08:20:31,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-25 08:20:31,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-25 08:20:31,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-25 08:20:31,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-25 08:20:31,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-25 08:20:31,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-25 08:20:31,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-25 08:20:31,924 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-RepeatedVariableLbe.epf [2021-03-25 08:20:31,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 08:20:31,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 08:20:31,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 08:20:31,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 08:20:31,962 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 08:20:31,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 08:20:31,963 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 08:20:31,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 08:20:31,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 08:20:31,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 08:20:31,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 08:20:31,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 08:20:31,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 08:20:31,965 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 08:20:31,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 08:20:31,965 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 08:20:31,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 08:20:31,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 08:20:31,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 08:20:31,965 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 08:20:31,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 08:20:31,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 08:20:31,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 08:20:31,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 08:20:31,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 08:20:31,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 08:20:31,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 08:20:31,967 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-25 08:20:31,967 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 08:20:31,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 08:20:31,967 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 08:20:32,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 08:20:32,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 08:20:32,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 08:20:32,261 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 08:20:32,263 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 08:20:32,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/spaghetti.wvr.bpl [2021-03-25 08:20:32,264 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/spaghetti.wvr.bpl' [2021-03-25 08:20:32,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 08:20:32,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 08:20:32,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 08:20:32,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 08:20:32,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 08:20:32,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:20:32" (1/1) ... [2021-03-25 08:20:32,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:20:32" (1/1) ... [2021-03-25 08:20:32,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 08:20:32,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 08:20:32,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 08:20:32,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 08:20:32,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:20:32" (1/1) ... [2021-03-25 08:20:32,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:20:32" (1/1) ... [2021-03-25 08:20:32,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:20:32" (1/1) ... [2021-03-25 08:20:32,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:20:32" (1/1) ... [2021-03-25 08:20:32,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:20:32" (1/1) ... [2021-03-25 08:20:32,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:20:32" (1/1) ... [2021-03-25 08:20:32,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:20:32" (1/1) ... [2021-03-25 08:20:32,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 08:20:32,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 08:20:32,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 08:20:32,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 08:20:32,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:20:32" (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 [2021-03-25 08:20:32,397 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-25 08:20:32,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-25 08:20:32,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-25 08:20:32,400 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-25 08:20:32,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-25 08:20:32,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-25 08:20:32,401 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-25 08:20:32,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 08:20:32,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 08:20:32,401 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-25 08:20:32,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-25 08:20:32,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-25 08:20:32,401 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-25 08:20:32,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-25 08:20:32,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-25 08:20:32,403 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 08:20:32,542 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 08:20:32,543 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-03-25 08:20:32,544 INFO L202 PluginConnector]: Adding new model spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 08:20:32 BoogieIcfgContainer [2021-03-25 08:20:32,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 08:20:32,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 08:20:32,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 08:20:32,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 08:20:32,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 08:20:32" (1/2) ... [2021-03-25 08:20:32,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6779c9 and model type spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 08:20:32, skipping insertion in model container [2021-03-25 08:20:32,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 08:20:32" (2/2) ... [2021-03-25 08:20:32,550 INFO L111 eAbstractionObserver]: Analyzing ICFG spaghetti.wvr.bpl [2021-03-25 08:20:32,553 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 08:20:32,559 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-25 08:20:32,560 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 08:20:32,616 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-25 08:20:32,632 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-25 08:20:32,676 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 08:20:32,676 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 08:20:32,676 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 08:20:32,677 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 08:20:32,677 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 08:20:32,677 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 08:20:32,677 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 08:20:32,677 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 08:20:32,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 43 places, 34 transitions, 100 flow [2021-03-25 08:20:32,726 INFO L129 PetriNetUnfolder]: 4/30 cut-off events. [2021-03-25 08:20:32,727 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 08:20:32,730 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 30 events. 4/30 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 60 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2021-03-25 08:20:32,730 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 34 transitions, 100 flow [2021-03-25 08:20:32,733 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 28 transitions, 80 flow [2021-03-25 08:20:32,735 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 08:20:32,748 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 37 places, 28 transitions, 80 flow [2021-03-25 08:20:32,756 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 37 places, 28 transitions, 80 flow [2021-03-25 08:20:32,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 37 places, 28 transitions, 80 flow [2021-03-25 08:20:32,774 INFO L129 PetriNetUnfolder]: 4/28 cut-off events. [2021-03-25 08:20:32,775 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 08:20:32,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 28 events. 4/28 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 60 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2021-03-25 08:20:32,777 INFO L142 LiptonReduction]: Number of co-enabled transitions 350 [2021-03-25 08:20:32,869 INFO L154 LiptonReduction]: Checked pairs total: 372 [2021-03-25 08:20:32,869 INFO L156 LiptonReduction]: Total number of compositions: 5 [2021-03-25 08:20:32,871 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 137 [2021-03-25 08:20:32,881 INFO L129 PetriNetUnfolder]: 4/22 cut-off events. [2021-03-25 08:20:32,882 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 08:20:32,882 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 08:20:32,882 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 08:20:32,883 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 08:20:32,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 08:20:32,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1994548771, now seen corresponding path program 1 times [2021-03-25 08:20:32,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 08:20:32,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517876721] [2021-03-25 08:20:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 08:20:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 08:20:32,997 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:20:32,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 08:20:33,007 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:20:33,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 08:20:33,027 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-25 08:20:33,028 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 08:20:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 08:20:33,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517876721] [2021-03-25 08:20:33,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 08:20:33,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 08:20:33,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409362606] [2021-03-25 08:20:33,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 08:20:33,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 08:20:33,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 08:20:33,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-25 08:20:33,065 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 39 [2021-03-25 08:20:33,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2021-03-25 08:20:33,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 08:20:33,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 39 [2021-03-25 08:20:33,069 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 08:20:33,252 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([102] L47-->thread4EXIT: Formula: (= v_x_1_13 0) InVars {} OutVars{x_1=v_x_1_13} AuxVars[] AssignedVars[x_1][21], [19#thread1EXITtrue, 52#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1))), thread4Thread1of1ForFork2InUse, thread2Thread1of1ForFork0InUse, 10#L60true, 28#L26true, thread3Thread1of1ForFork1InUse, 29#L36true, thread1Thread1of1ForFork3InUse, 31#thread4EXITtrue]) [2021-03-25 08:20:33,253 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,253 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,253 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,253 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-25 08:20:33,254 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([86] L47-->L49: Formula: (= v_x_1_8 (* v_x_1_9 10)) InVars {x_1=v_x_1_9} OutVars{x_1=v_x_1_8} AuxVars[] AssignedVars[x_1][22], [49#(and (<= x_0 0) (<= 0 x_0)), 19#thread1EXITtrue, thread4Thread1of1ForFork2InUse, thread2Thread1of1ForFork0InUse, 10#L60true, 11#L49true, 28#L26true, thread3Thread1of1ForFork1InUse, 29#L36true, thread1Thread1of1ForFork3InUse]) [2021-03-25 08:20:33,254 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,254 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,254 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,254 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-25 08:20:33,267 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([102] L47-->thread4EXIT: Formula: (= v_x_1_13 0) InVars {} OutVars{x_1=v_x_1_13} AuxVars[] AssignedVars[x_1][23], [thread4Thread1of1ForFork2InUse, thread2Thread1of1ForFork0InUse, 10#L60true, 28#L26true, thread3Thread1of1ForFork1InUse, 29#L36true, thread1Thread1of1ForFork3InUse, 15#L17true, 31#thread4EXITtrue, 47#true]) [2021-03-25 08:20:33,268 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,268 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-25 08:20:33,268 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,268 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,268 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([86] L47-->L49: Formula: (= v_x_1_8 (* v_x_1_9 10)) InVars {x_1=v_x_1_9} OutVars{x_1=v_x_1_8} AuxVars[] AssignedVars[x_1][24], [thread4Thread1of1ForFork2InUse, thread2Thread1of1ForFork0InUse, 10#L60true, 11#L49true, 28#L26true, thread3Thread1of1ForFork1InUse, 29#L36true, thread1Thread1of1ForFork3InUse, 15#L17true, 47#true]) [2021-03-25 08:20:33,268 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,268 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-25 08:20:33,269 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,269 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,307 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([102] L47-->thread4EXIT: Formula: (= v_x_1_13 0) InVars {} OutVars{x_1=v_x_1_13} AuxVars[] AssignedVars[x_1][23], [34#L18true, thread4Thread1of1ForFork2InUse, thread2Thread1of1ForFork0InUse, 10#L60true, 28#L26true, thread3Thread1of1ForFork1InUse, 29#L36true, thread1Thread1of1ForFork3InUse, 31#thread4EXITtrue, 47#true]) [2021-03-25 08:20:33,308 INFO L384 tUnfolder$Statistics]: this new event has 10 ancestors and is cut-off event [2021-03-25 08:20:33,308 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,308 INFO L387 tUnfolder$Statistics]: existing Event has 7 ancestors and is cut-off event [2021-03-25 08:20:33,308 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,308 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([86] L47-->L49: Formula: (= v_x_1_8 (* v_x_1_9 10)) InVars {x_1=v_x_1_9} OutVars{x_1=v_x_1_8} AuxVars[] AssignedVars[x_1][24], [34#L18true, thread4Thread1of1ForFork2InUse, thread2Thread1of1ForFork0InUse, 10#L60true, 11#L49true, 28#L26true, thread3Thread1of1ForFork1InUse, 29#L36true, thread1Thread1of1ForFork3InUse, 47#true]) [2021-03-25 08:20:33,308 INFO L384 tUnfolder$Statistics]: this new event has 10 ancestors and is cut-off event [2021-03-25 08:20:33,308 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,309 INFO L387 tUnfolder$Statistics]: existing Event has 7 ancestors and is cut-off event [2021-03-25 08:20:33,309 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,349 INFO L129 PetriNetUnfolder]: 887/1206 cut-off events. [2021-03-25 08:20:33,350 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2021-03-25 08:20:33,353 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2422 conditions, 1206 events. 887/1206 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 4741 event pairs, 239 based on Foata normal form. 1/812 useless extension candidates. Maximal degree in co-relation 2398. Up to 664 conditions per place. [2021-03-25 08:20:33,360 INFO L132 encePairwiseOnDemand]: 30/39 looper letters, 29 selfloop transitions, 10 changer transitions 4/51 dead transitions. [2021-03-25 08:20:33,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 51 transitions, 212 flow [2021-03-25 08:20:33,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 08:20:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 08:20:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2021-03-25 08:20:33,370 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7435897435897436 [2021-03-25 08:20:33,371 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 116 transitions. [2021-03-25 08:20:33,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 116 transitions. [2021-03-25 08:20:33,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 08:20:33,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 116 transitions. [2021-03-25 08:20:33,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2021-03-25 08:20:33,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 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) [2021-03-25 08:20:33,379 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 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) [2021-03-25 08:20:33,381 INFO L185 Difference]: Start difference. First operand has 32 places, 23 transitions, 70 flow. Second operand 4 states and 116 transitions. [2021-03-25 08:20:33,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 51 transitions, 212 flow [2021-03-25 08:20:33,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 51 transitions, 196 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-03-25 08:20:33,386 INFO L241 Difference]: Finished difference. Result has 30 places, 33 transitions, 132 flow [2021-03-25 08:20:33,392 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=30, PETRI_TRANSITIONS=33} [2021-03-25 08:20:33,393 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, -2 predicate places. [2021-03-25 08:20:33,393 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 08:20:33,393 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 30 places, 33 transitions, 132 flow [2021-03-25 08:20:33,394 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 30 places, 33 transitions, 132 flow [2021-03-25 08:20:33,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 30 places, 33 transitions, 132 flow [2021-03-25 08:20:33,408 INFO L129 PetriNetUnfolder]: 59/162 cut-off events. [2021-03-25 08:20:33,408 INFO L130 PetriNetUnfolder]: For 61/83 co-relation queries the response was YES. [2021-03-25 08:20:33,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 162 events. 59/162 cut-off events. For 61/83 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 816 event pairs, 9 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 333. Up to 53 conditions per place. [2021-03-25 08:20:33,411 INFO L142 LiptonReduction]: Number of co-enabled transitions 368 [2021-03-25 08:20:33,420 INFO L154 LiptonReduction]: Checked pairs total: 152 [2021-03-25 08:20:33,421 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 08:20:33,424 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 31 [2021-03-25 08:20:33,425 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 33 transitions, 132 flow [2021-03-25 08:20:33,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2021-03-25 08:20:33,425 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 08:20:33,427 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 08:20:33,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 08:20:33,427 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 08:20:33,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 08:20:33,428 INFO L82 PathProgramCache]: Analyzing trace with hash -740165853, now seen corresponding path program 2 times [2021-03-25 08:20:33,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 08:20:33,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017167816] [2021-03-25 08:20:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 08:20:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 08:20:33,482 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:20:33,482 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 08:20:33,484 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 08:20:33,485 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 08:20:33,492 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-25 08:20:33,493 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 08:20:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 08:20:33,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017167816] [2021-03-25 08:20:33,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 08:20:33,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 08:20:33,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862708157] [2021-03-25 08:20:33,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 08:20:33,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 08:20:33,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 08:20:33,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-25 08:20:33,507 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 39 [2021-03-25 08:20:33,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 33 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2021-03-25 08:20:33,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 08:20:33,508 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 39 [2021-03-25 08:20:33,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 08:20:33,606 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([86] L47-->L49: Formula: (= v_x_1_8 (* v_x_1_9 10)) InVars {x_1=v_x_1_9} OutVars{x_1=v_x_1_8} AuxVars[] AssignedVars[x_1][18], [Black: 49#(and (<= x_0 0) (<= 0 x_0)), Black: 52#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1))), 58#true, 10#L60true, 11#L49true, 28#L26true, 29#L36true, 47#true, 15#L17true]) [2021-03-25 08:20:33,607 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,607 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,607 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-25 08:20:33,607 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,607 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([102] L47-->thread4EXIT: Formula: (= v_x_1_13 0) InVars {} OutVars{x_1=v_x_1_13} AuxVars[] AssignedVars[x_1][20], [Black: 49#(and (<= x_0 0) (<= 0 x_0)), Black: 52#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1))), 10#L60true, 28#L26true, 60#(and (<= 0 x_1) (<= x_1 0)), 29#L36true, 47#true, 15#L17true, 31#thread4EXITtrue]) [2021-03-25 08:20:33,607 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,607 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-25 08:20:33,607 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,608 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,612 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([86] L47-->L49: Formula: (= v_x_1_8 (* v_x_1_9 10)) InVars {x_1=v_x_1_9} OutVars{x_1=v_x_1_8} AuxVars[] AssignedVars[x_1][18], [49#(and (<= x_0 0) (<= 0 x_0)), 19#thread1EXITtrue, Black: 52#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1))), Black: 47#true, 10#L60true, 58#true, 11#L49true, 28#L26true, 29#L36true]) [2021-03-25 08:20:33,612 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,612 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,612 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,613 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-25 08:20:33,613 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([102] L47-->thread4EXIT: Formula: (= v_x_1_13 0) InVars {} OutVars{x_1=v_x_1_13} AuxVars[] AssignedVars[x_1][21], [19#thread1EXITtrue, 52#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1))), Black: 49#(and (<= x_0 0) (<= 0 x_0)), Black: 47#true, 10#L60true, 60#(and (<= 0 x_1) (<= x_1 0)), 28#L26true, 29#L36true, 31#thread4EXITtrue]) [2021-03-25 08:20:33,613 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,613 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,613 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 08:20:33,613 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-25 08:20:33,637 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([86] L47-->L49: Formula: (= v_x_1_8 (* v_x_1_9 10)) InVars {x_1=v_x_1_9} OutVars{x_1=v_x_1_8} AuxVars[] AssignedVars[x_1][18], [34#L18true, Black: 49#(and (<= x_0 0) (<= 0 x_0)), Black: 52#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1))), 10#L60true, 58#true, 11#L49true, 28#L26true, 29#L36true, 47#true]) [2021-03-25 08:20:33,638 INFO L384 tUnfolder$Statistics]: this new event has 10 ancestors and is cut-off event [2021-03-25 08:20:33,638 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,638 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,638 INFO L387 tUnfolder$Statistics]: existing Event has 7 ancestors and is cut-off event [2021-03-25 08:20:33,638 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([102] L47-->thread4EXIT: Formula: (= v_x_1_13 0) InVars {} OutVars{x_1=v_x_1_13} AuxVars[] AssignedVars[x_1][20], [34#L18true, Black: 49#(and (<= x_0 0) (<= 0 x_0)), Black: 52#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1))), 10#L60true, 60#(and (<= 0 x_1) (<= x_1 0)), 28#L26true, 29#L36true, 31#thread4EXITtrue, 47#true]) [2021-03-25 08:20:33,638 INFO L384 tUnfolder$Statistics]: this new event has 10 ancestors and is cut-off event [2021-03-25 08:20:33,638 INFO L387 tUnfolder$Statistics]: existing Event has 7 ancestors and is cut-off event [2021-03-25 08:20:33,639 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,639 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-25 08:20:33,699 INFO L129 PetriNetUnfolder]: 994/1405 cut-off events. [2021-03-25 08:20:33,699 INFO L130 PetriNetUnfolder]: For 797/860 co-relation queries the response was YES. [2021-03-25 08:20:33,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3815 conditions, 1405 events. 994/1405 cut-off events. For 797/860 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 6138 event pairs, 247 based on Foata normal form. 1/1380 useless extension candidates. Maximal degree in co-relation 3744. Up to 756 conditions per place. [2021-03-25 08:20:33,703 INFO L132 encePairwiseOnDemand]: 30/39 looper letters, 0 selfloop transitions, 0 changer transitions 68/68 dead transitions. [2021-03-25 08:20:33,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 68 transitions, 388 flow [2021-03-25 08:20:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 08:20:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 08:20:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2021-03-25 08:20:33,705 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7371794871794872 [2021-03-25 08:20:33,705 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2021-03-25 08:20:33,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2021-03-25 08:20:33,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 08:20:33,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2021-03-25 08:20:33,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2021-03-25 08:20:33,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 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) [2021-03-25 08:20:33,707 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 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) [2021-03-25 08:20:33,707 INFO L185 Difference]: Start difference. First operand has 30 places, 33 transitions, 132 flow. Second operand 4 states and 115 transitions. [2021-03-25 08:20:33,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 68 transitions, 388 flow [2021-03-25 08:20:33,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 68 transitions, 388 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-25 08:20:33,710 INFO L241 Difference]: Finished difference. Result has 32 places, 0 transitions, 0 flow [2021-03-25 08:20:33,710 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=32, PETRI_TRANSITIONS=0} [2021-03-25 08:20:33,710 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2021-03-25 08:20:33,710 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 08:20:33,711 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 32 places, 0 transitions, 0 flow [2021-03-25 08:20:33,711 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 32 places, 0 transitions, 0 flow [2021-03-25 08:20:33,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-03-25 08:20:33,711 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-03-25 08:20:33,711 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 08:20:33,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 0 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs, 0 based on Foata normal form. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 0 conditions per place. [2021-03-25 08:20:33,711 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 08:20:33,712 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 08:20:33,712 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 08:20:33,712 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2 [2021-03-25 08:20:33,712 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-03-25 08:20:33,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2021-03-25 08:20:33,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 08:20:33,716 INFO L202 PluginConnector]: Adding new model spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 08:20:33 BasicIcfg [2021-03-25 08:20:33,716 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 08:20:33,717 INFO L168 Benchmark]: Toolchain (without parser) took 1415.88 ms. Allocated memory was 255.9 MB in the beginning and 356.5 MB in the end (delta: 100.7 MB). Free memory was 236.2 MB in the beginning and 328.8 MB in the end (delta: -92.6 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.0 GB. [2021-03-25 08:20:33,718 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.45 ms. Allocated memory is still 255.9 MB. Free memory was 237.3 MB in the beginning and 237.2 MB in the end (delta: 91.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 08:20:33,718 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.99 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 08:20:33,719 INFO L168 Benchmark]: Boogie Preprocessor took 14.77 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 863.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 08:20:33,719 INFO L168 Benchmark]: RCFGBuilder took 201.11 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 239.7 MB in the end (delta: -6.0 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.0 GB. [2021-03-25 08:20:33,720 INFO L168 Benchmark]: TraceAbstraction took 1171.01 ms. Allocated memory was 255.9 MB in the beginning and 356.5 MB in the end (delta: 100.7 MB). Free memory was 239.3 MB in the beginning and 328.8 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.0 GB. [2021-03-25 08:20:33,722 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 0.45 ms. Allocated memory is still 255.9 MB. Free memory was 237.3 MB in the beginning and 237.2 MB in the end (delta: 91.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.99 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.77 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 863.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 201.11 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 239.7 MB in the end (delta: -6.0 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1171.01 ms. Allocated memory was 255.9 MB in the beginning and 356.5 MB in the end (delta: 100.7 MB). Free memory was 239.3 MB in the beginning and 328.8 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 113.1ms, 37 PlacesBefore, 32 PlacesAfterwards, 28 TransitionsBefore, 23 TransitionsAfterwards, 350 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 372 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 140, positive: 120, positive conditional: 0, positive unconditional: 120, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 97, positive: 87, positive conditional: 0, positive unconditional: 87, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 97, positive: 87, positive conditional: 0, positive unconditional: 87, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 140, positive: 33, positive conditional: 0, positive unconditional: 33, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 97, unknown conditional: 0, unknown unconditional: 97] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 29.4ms, 30 PlacesBefore, 30 PlacesAfterwards, 33 TransitionsBefore, 33 TransitionsAfterwards, 368 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 152 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 26, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 7, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 7, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 26, positive: 13, positive conditional: 0, positive unconditional: 13, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 7, unknown conditional: 0, unknown unconditional: 7] , Statistics on independence cache: Total cache size (in pairs): 31, Positive cache size: 23, Positive conditional cache size: 0, Positive unconditional cache size: 23, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.9ms, 32 PlacesBefore, 0 PlacesAfterwards, 0 TransitionsBefore, 0 TransitionsAfterwards, 0 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 31, Positive cache size: 23, Positive conditional cache size: 0, Positive unconditional cache size: 23, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8 - PositiveResult [Line: 66]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1041.4ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 538.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 198.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 54 SDtfs, 13 SDslu, 14 SDs, 0 SdLazy, 100 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 103.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=1, InterpolantAutomatonStates: 8, 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: 6.9ms SsaConstructionTime, 18.9ms SatisfiabilityAnalysisTime, 136.4ms InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 116 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...