/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-RepeatedSemanticLbe.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 18:17:14,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 18:17:14,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 18:17:14,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-25 18:17:14,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-25 18:17:14,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-25 18:17:14,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-25 18:17:14,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-25 18:17:14,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-25 18:17:14,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-25 18:17:14,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-25 18:17:14,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-25 18:17:14,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-25 18:17:14,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-25 18:17:14,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-25 18:17:14,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-25 18:17:14,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-25 18:17:14,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-25 18:17:14,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-25 18:17:14,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-25 18:17:14,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-25 18:17:14,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-25 18:17:14,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-25 18:17:14,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-25 18:17:14,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-25 18:17:14,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-25 18:17:14,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-25 18:17:14,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-25 18:17:14,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-25 18:17:14,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-25 18:17:14,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-25 18:17:14,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-25 18:17:14,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-25 18:17:14,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-25 18:17:14,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-25 18:17:14,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-25 18:17:14,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-25 18:17:14,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-25 18:17:14,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-25 18:17:14,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-25 18:17:14,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-25 18:17:14,403 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-RepeatedSemanticLbe.epf [2021-03-25 18:17:14,438 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 18:17:14,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 18:17:14,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 18:17:14,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 18:17:14,439 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 18:17:14,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 18:17:14,440 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 18:17:14,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 18:17:14,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 18:17:14,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 18:17:14,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 18:17:14,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 18:17:14,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 18:17:14,441 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 18:17:14,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 18:17:14,441 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 18:17:14,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 18:17:14,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 18:17:14,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 18:17:14,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 18:17:14,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 18:17:14,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 18:17:14,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 18:17:14,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 18:17:14,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 18:17:14,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 18:17:14,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 18:17:14,443 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 18:17:14,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 18:17:14,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 18:17:14,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 18:17:14,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 18:17:14,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 18:17:14,730 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 18:17:14,731 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 18:17:14,732 INFO L432 ainManager$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 18:17:14,733 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/spaghetti.wvr.bpl' [2021-03-25 18:17:14,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 18:17:14,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 18:17:14,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 18:17:14,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 18:17:14,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 18:17:14,796 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 06:17:14" (1/1) ... [2021-03-25 18:17:14,802 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 06:17:14" (1/1) ... [2021-03-25 18:17:14,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 18:17:14,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 18:17:14,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 18:17:14,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 18:17:14,816 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 06:17:14" (1/1) ... [2021-03-25 18:17:14,816 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 06:17:14" (1/1) ... [2021-03-25 18:17:14,817 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 06:17:14" (1/1) ... [2021-03-25 18:17:14,817 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 06:17:14" (1/1) ... [2021-03-25 18:17:14,819 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 06:17:14" (1/1) ... [2021-03-25 18:17:14,821 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 06:17:14" (1/1) ... [2021-03-25 18:17:14,822 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 06:17:14" (1/1) ... [2021-03-25 18:17:14,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 18:17:14,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 18:17:14,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 18:17:14,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 18:17:14,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 06:17:14" (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 18:17:14,890 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-25 18:17:14,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-25 18:17:14,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-25 18:17:14,890 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-25 18:17:14,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-25 18:17:14,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-25 18:17:14,890 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-25 18:17:14,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 18:17:14,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 18:17:14,891 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-25 18:17:14,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-25 18:17:14,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-25 18:17:14,891 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-25 18:17:14,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-25 18:17:14,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-25 18:17:14,892 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 18:17:15,065 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 18:17:15,066 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-03-25 18:17:15,067 INFO L202 PluginConnector]: Adding new model spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 06:17:15 BoogieIcfgContainer [2021-03-25 18:17:15,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 18:17:15,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 18:17:15,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 18:17:15,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 18:17:15,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 06:17:14" (1/2) ... [2021-03-25 18:17:15,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f69597d and model type spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 06:17:15, skipping insertion in model container [2021-03-25 18:17:15,097 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 06:17:15" (2/2) ... [2021-03-25 18:17:15,098 INFO L111 eAbstractionObserver]: Analyzing ICFG spaghetti.wvr.bpl [2021-03-25 18:17:15,102 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 18:17:15,106 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-25 18:17:15,107 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 18:17:15,200 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-25 18:17:15,230 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-25 18:17:15,267 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 18:17:15,268 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 18:17:15,268 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 18:17:15,268 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 18:17:15,268 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 18:17:15,268 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 18:17:15,268 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 18:17:15,268 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 18:17:15,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 43 places, 34 transitions, 100 flow [2021-03-25 18:17:15,317 INFO L129 PetriNetUnfolder]: 4/30 cut-off events. [2021-03-25 18:17:15,317 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 18:17:15,321 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 18:17:15,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 34 transitions, 100 flow [2021-03-25 18:17:15,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 28 transitions, 80 flow [2021-03-25 18:17:15,327 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 18:17:15,342 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 37 places, 28 transitions, 80 flow [2021-03-25 18:17:15,349 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 37 places, 28 transitions, 80 flow [2021-03-25 18:17:15,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 37 places, 28 transitions, 80 flow [2021-03-25 18:17:15,368 INFO L129 PetriNetUnfolder]: 4/28 cut-off events. [2021-03-25 18:17:15,368 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 18:17:15,369 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 18:17:15,372 INFO L142 LiptonReduction]: Number of co-enabled transitions 350 [2021-03-25 18:17:17,810 INFO L154 LiptonReduction]: Checked pairs total: 344 [2021-03-25 18:17:17,810 INFO L156 LiptonReduction]: Total number of compositions: 9 [2021-03-25 18:17:17,812 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2486 [2021-03-25 18:17:17,822 INFO L129 PetriNetUnfolder]: 4/18 cut-off events. [2021-03-25 18:17:17,822 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 18:17:17,823 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 18:17:17,823 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 18:17:17,823 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 18:17:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 18:17:17,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1742528367, now seen corresponding path program 1 times [2021-03-25 18:17:17,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 18:17:17,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53798225] [2021-03-25 18:17:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 18:17:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 18:17:17,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 18:17:17,933 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 18:17:17,937 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 18:17:17,937 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 18:17:17,949 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-25 18:17:17,950 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 18:17:17,957 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 18:17:17,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53798225] [2021-03-25 18:17:17,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 18:17:17,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 18:17:17,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124320401] [2021-03-25 18:17:17,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 18:17:17,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 18:17:17,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 18:17:17,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-25 18:17:17,977 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2021-03-25 18:17:17,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 62 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 18:17:17,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 18:17:17,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2021-03-25 18:17:17,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 18:17:18,062 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([102] L47-->thread4EXIT: Formula: (= v_x_1_18 0) InVars {} OutVars{x_1=v_x_1_18} AuxVars[] AssignedVars[x_1][11], [49#(and (<= 0 x_1) (<= x_1 0)), 19#thread1EXITtrue, thread4Thread1of1ForFork2InUse, 10#L60true, thread2Thread1of1ForFork0InUse, thread3Thread1of1ForFork1InUse, 28#L26true, 29#L36true, thread1Thread1of1ForFork3InUse, 31#thread4EXITtrue]) [2021-03-25 18:17:18,063 INFO L384 tUnfolder$Statistics]: this new event has 8 ancestors and is cut-off event [2021-03-25 18:17:18,063 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 18:17:18,063 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-25 18:17:18,063 INFO L387 tUnfolder$Statistics]: existing Event has 7 ancestors and is cut-off event [2021-03-25 18:17:18,063 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([86] L47-->L49: Formula: (= v_x_1_8 (* v_x_1_9 10)) InVars {x_1=v_x_1_9} OutVars{x_1=v_x_1_8} AuxVars[] AssignedVars[x_1][12], [19#thread1EXITtrue, thread4Thread1of1ForFork2InUse, 10#L60true, thread2Thread1of1ForFork0InUse, 11#L49true, thread3Thread1of1ForFork1InUse, 28#L26true, 29#L36true, thread1Thread1of1ForFork3InUse, 47#true]) [2021-03-25 18:17:18,064 INFO L384 tUnfolder$Statistics]: this new event has 8 ancestors and is cut-off event [2021-03-25 18:17:18,064 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 18:17:18,064 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-25 18:17:18,064 INFO L387 tUnfolder$Statistics]: existing Event has 7 ancestors and is cut-off event [2021-03-25 18:17:18,084 INFO L129 PetriNetUnfolder]: 233/343 cut-off events. [2021-03-25 18:17:18,084 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2021-03-25 18:17:18,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 343 events. 233/343 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1156 event pairs, 24 based on Foata normal form. 1/199 useless extension candidates. Maximal degree in co-relation 672. Up to 123 conditions per place. [2021-03-25 18:17:18,089 INFO L132 encePairwiseOnDemand]: 36/43 looper letters, 20 selfloop transitions, 7 changer transitions 4/39 dead transitions. [2021-03-25 18:17:18,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 39 transitions, 164 flow [2021-03-25 18:17:18,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 18:17:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 18:17:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2021-03-25 18:17:18,098 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2021-03-25 18:17:18,099 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 104 transitions. [2021-03-25 18:17:18,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 104 transitions. [2021-03-25 18:17:18,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 18:17:18,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 104 transitions. [2021-03-25 18:17:18,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 18:17:18,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 18:17:18,107 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 18:17:18,108 INFO L185 Difference]: Start difference. First operand has 28 places, 19 transitions, 62 flow. Second operand 4 states and 104 transitions. [2021-03-25 18:17:18,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 39 transitions, 164 flow [2021-03-25 18:17:18,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 39 transitions, 148 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-03-25 18:17:18,115 INFO L241 Difference]: Finished difference. Result has 26 places, 26 transitions, 102 flow [2021-03-25 18:17:18,116 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2021-03-25 18:17:18,117 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, -2 predicate places. [2021-03-25 18:17:18,117 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 18:17:18,117 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 26 places, 26 transitions, 102 flow [2021-03-25 18:17:18,117 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 26 places, 26 transitions, 102 flow [2021-03-25 18:17:18,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 26 places, 26 transitions, 102 flow [2021-03-25 18:17:18,125 INFO L129 PetriNetUnfolder]: 31/74 cut-off events. [2021-03-25 18:17:18,125 INFO L130 PetriNetUnfolder]: For 19/20 co-relation queries the response was YES. [2021-03-25 18:17:18,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 74 events. 31/74 cut-off events. For 19/20 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 225 event pairs, 3 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 141. Up to 23 conditions per place. [2021-03-25 18:17:18,127 INFO L142 LiptonReduction]: Number of co-enabled transitions 206 [2021-03-25 18:17:18,129 INFO L154 LiptonReduction]: Checked pairs total: 56 [2021-03-25 18:17:18,130 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 18:17:18,130 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 13 [2021-03-25 18:17:18,131 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 102 flow [2021-03-25 18:17:18,131 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 18:17:18,131 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 18:17:18,131 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 18:17:18,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 18:17:18,132 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 18:17:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 18:17:18,132 INFO L82 PathProgramCache]: Analyzing trace with hash -256849165, now seen corresponding path program 2 times [2021-03-25 18:17:18,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 18:17:18,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431594372] [2021-03-25 18:17:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 18:17:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 18:17:18,175 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 18:17:18,175 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 18:17:18,176 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 18:17:18,177 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 18:17:18,183 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-25 18:17:18,184 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 18:17:18,190 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 18:17:18,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431594372] [2021-03-25 18:17:18,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 18:17:18,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 18:17:18,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707743083] [2021-03-25 18:17:18,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 18:17:18,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 18:17:18,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 18:17:18,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-25 18:17:18,193 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2021-03-25 18:17:18,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 102 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 18:17:18,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 18:17:18,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2021-03-25 18:17:18,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 18:17:18,295 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][21], [19#thread1EXITtrue, Black: 49#(and (<= 0 x_1) (<= x_1 0)), Black: 52#(and (<= 0 x_1) (< x_0 (+ x_1 1)) (<= x_1 x_0) (<= x_1 0)), 10#L60true, 11#L49true, 28#L26true, 60#(and (<= x_0 0) (<= 0 x_0)), 29#L36true, 47#true]) [2021-03-25 18:17:18,295 INFO L384 tUnfolder$Statistics]: this new event has 8 ancestors and is cut-off event [2021-03-25 18:17:18,295 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 18:17:18,295 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-25 18:17:18,295 INFO L387 tUnfolder$Statistics]: existing Event has 7 ancestors and is cut-off event [2021-03-25 18:17:18,296 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([102] L47-->thread4EXIT: Formula: (= v_x_1_18 0) InVars {} OutVars{x_1=v_x_1_18} AuxVars[] AssignedVars[x_1][23], [49#(and (<= 0 x_1) (<= x_1 0)), 19#thread1EXITtrue, Black: 52#(and (<= 0 x_1) (< x_0 (+ x_1 1)) (<= x_1 x_0) (<= x_1 0)), Black: 47#true, 10#L60true, 28#L26true, 29#L36true, 31#thread4EXITtrue, 63#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1)))]) [2021-03-25 18:17:18,296 INFO L384 tUnfolder$Statistics]: this new event has 8 ancestors and is cut-off event [2021-03-25 18:17:18,296 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-25 18:17:18,296 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-25 18:17:18,296 INFO L387 tUnfolder$Statistics]: existing Event has 7 ancestors and is cut-off event [2021-03-25 18:17:18,313 INFO L129 PetriNetUnfolder]: 274/408 cut-off events. [2021-03-25 18:17:18,313 INFO L130 PetriNetUnfolder]: For 259/301 co-relation queries the response was YES. [2021-03-25 18:17:18,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 408 events. 274/408 cut-off events. For 259/301 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1515 event pairs, 17 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 1077. Up to 137 conditions per place. [2021-03-25 18:17:18,316 INFO L132 encePairwiseOnDemand]: 36/43 looper letters, 0 selfloop transitions, 0 changer transitions 51/51 dead transitions. [2021-03-25 18:17:18,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 51 transitions, 286 flow [2021-03-25 18:17:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 18:17:18,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 18:17:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2021-03-25 18:17:18,321 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5988372093023255 [2021-03-25 18:17:18,322 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 103 transitions. [2021-03-25 18:17:18,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 103 transitions. [2021-03-25 18:17:18,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 18:17:18,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 103 transitions. [2021-03-25 18:17:18,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 18:17:18,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 18:17:18,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 18:17:18,328 INFO L185 Difference]: Start difference. First operand has 26 places, 26 transitions, 102 flow. Second operand 4 states and 103 transitions. [2021-03-25 18:17:18,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 51 transitions, 286 flow [2021-03-25 18:17:18,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 51 transitions, 286 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-25 18:17:18,331 INFO L241 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2021-03-25 18:17:18,331 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2021-03-25 18:17:18,332 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2021-03-25 18:17:18,332 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 18:17:18,332 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 0 transitions, 0 flow [2021-03-25 18:17:18,333 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 0 transitions, 0 flow [2021-03-25 18:17:18,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-03-25 18:17:18,333 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-03-25 18:17:18,333 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 18:17:18,333 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 18:17:18,334 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 18:17:18,334 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 18:17:18,334 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 18:17:18,334 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2 [2021-03-25 18:17:18,336 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-03-25 18:17:18,336 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 18:17:18,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 18:17:18,340 INFO L202 PluginConnector]: Adding new model spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 06:17:18 BasicIcfg [2021-03-25 18:17:18,340 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 18:17:18,341 INFO L168 Benchmark]: Toolchain (without parser) took 3555.11 ms. Allocated memory was 255.9 MB in the beginning and 364.9 MB in the end (delta: 109.1 MB). Free memory was 237.0 MB in the beginning and 307.0 MB in the end (delta: -70.0 MB). Peak memory consumption was 40.2 MB. Max. memory is 16.0 GB. [2021-03-25 18:17:18,341 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.82 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 18:17:18,342 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.95 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 18:17:18,342 INFO L168 Benchmark]: Boogie Preprocessor took 13.82 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.4 MB in the end (delta: 984.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 18:17:18,344 INFO L168 Benchmark]: RCFGBuilder took 242.94 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 224.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-25 18:17:18,345 INFO L168 Benchmark]: TraceAbstraction took 3271.56 ms. Allocated memory was 255.9 MB in the beginning and 364.9 MB in the end (delta: 109.1 MB). Free memory was 223.7 MB in the beginning and 307.0 MB in the end (delta: -83.2 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.0 GB. [2021-03-25 18:17:18,350 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 0.82 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.95 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.82 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.4 MB in the end (delta: 984.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 242.94 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 224.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3271.56 ms. Allocated memory was 255.9 MB in the beginning and 364.9 MB in the end (delta: 109.1 MB). Free memory was 223.7 MB in the beginning and 307.0 MB in the end (delta: -83.2 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2460.8ms, 37 PlacesBefore, 28 PlacesAfterwards, 28 TransitionsBefore, 19 TransitionsAfterwards, 350 CoEnabledTransitionPairs, 3 FixpointIterations, 1 TrivialSequentialCompositions, 8 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 9 TotalNumberOfCompositions, 344 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 225, positive: 209, positive conditional: 0, positive unconditional: 209, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 183, positive: 168, positive conditional: 0, positive unconditional: 168, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 183, positive: 168, positive conditional: 0, positive unconditional: 168, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 183, positive: 147, positive conditional: 0, positive unconditional: 147, negative: 36, negative conditional: 0, negative unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 36, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 2, unknown conditional: 0, unknown unconditional: 2] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2320, positive: 75, positive conditional: 0, positive unconditional: 75, negative: 86, negative conditional: 0, negative unconditional: 86, unknown: 2160, unknown conditional: 0, unknown unconditional: 2160] ], Cache Queries: [ total: 225, positive: 41, positive conditional: 0, positive unconditional: 41, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 183, unknown conditional: 0, unknown unconditional: 183] , Statistics on independence cache: Total cache size (in pairs): 38, Positive cache size: 34, Positive conditional cache size: 0, Positive unconditional cache size: 34, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 12.2ms, 26 PlacesBefore, 26 PlacesAfterwards, 26 TransitionsBefore, 26 TransitionsAfterwards, 206 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 56 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 26, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 4, negative conditional: 0, negative unconditional: 4, 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: UnionIndependenceRelation.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] , UnionIndependenceRelation.Statistics on underlying relations: [ 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] , SemanticIndependenceRelation.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] , SemanticIndependenceRelation.Query Time [ms]: [ 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: 26, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 38, Positive cache size: 34, Positive conditional cache size: 0, Positive unconditional cache size: 34, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.0ms, 28 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: UnionIndependenceRelation.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] , UnionIndependenceRelation.Statistics on underlying relations: [ 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] , SemanticIndependenceRelation.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] , SemanticIndependenceRelation.Query Time [ms]: [ 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): 38, Positive cache size: 34, Positive conditional cache size: 0, Positive unconditional cache size: 34, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - 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: 4.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3093.7ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 283.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2549.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 48 SDtfs, 9 SDslu, 10 SDs, 0 SdLazy, 64 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=102occurred 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: 13.1ms SsaConstructionTime, 21.5ms SatisfiabilityAnalysisTime, 97.0ms InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 126 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...