/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/BuchiAutomizerBplInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Termination-32bit-Automizer_Default.epf --buchiautomizer.automaton.type.for.concurrent.programs BUCHI_PETRI_NET -i ../../../trunk/examples/concurrent/bpl/ConcurrentTerminationBpl/Nconcurrent_FourLoopsAlternating_nonterminating.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.fs.rabin-petrinet-4c29625-m [2023-10-12 17:18:07,398 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-10-12 17:18:07,468 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Termination-32bit-Automizer_Default.epf [2023-10-12 17:18:07,486 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-10-12 17:18:07,487 INFO L135 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-10-12 17:18:07,487 INFO L137 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-10-12 17:18:07,488 INFO L135 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-10-12 17:18:07,489 INFO L137 SettingsManager]: * Create parallel compositions if possible=false [2023-10-12 17:18:07,489 INFO L137 SettingsManager]: * Use SBE=true [2023-10-12 17:18:07,490 INFO L135 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-10-12 17:18:07,490 INFO L137 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-10-12 17:18:07,490 INFO L137 SettingsManager]: * Use old map elimination=false [2023-10-12 17:18:07,491 INFO L137 SettingsManager]: * Use external solver (rank synthesis)=false [2023-10-12 17:18:07,491 INFO L137 SettingsManager]: * Use only trivial implications for array writes=true [2023-10-12 17:18:07,491 INFO L137 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-10-12 17:18:07,492 INFO L135 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-10-12 17:18:07,492 INFO L137 SettingsManager]: * sizeof long=4 [2023-10-12 17:18:07,493 INFO L137 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-10-12 17:18:07,493 INFO L137 SettingsManager]: * Overapproximate operations on floating types=true [2023-10-12 17:18:07,494 INFO L137 SettingsManager]: * sizeof POINTER=4 [2023-10-12 17:18:07,494 INFO L137 SettingsManager]: * Check division by zero=IGNORE [2023-10-12 17:18:07,497 INFO L137 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-10-12 17:18:07,497 INFO L137 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-10-12 17:18:07,498 INFO L137 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-10-12 17:18:07,499 INFO L137 SettingsManager]: * sizeof long double=12 [2023-10-12 17:18:07,499 INFO L137 SettingsManager]: * Check if freed pointer was valid=false [2023-10-12 17:18:07,499 INFO L137 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-10-12 17:18:07,500 INFO L137 SettingsManager]: * Use constant arrays=true [2023-10-12 17:18:07,500 INFO L137 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-10-12 17:18:07,500 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-10-12 17:18:07,501 INFO L137 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-10-12 17:18:07,501 INFO L135 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-10-12 17:18:07,501 INFO L137 SettingsManager]: * Trace refinement strategy=CAMEL [2023-10-12 17:18:07,502 INFO L135 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-10-12 17:18:07,503 INFO L137 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: Automaton type for concurrent programs -> BUCHI_PETRI_NET [2023-10-12 17:18:07,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-10-12 17:18:07,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-10-12 17:18:07,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-10-12 17:18:07,767 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-10-12 17:18:07,767 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-10-12 17:18:07,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/ConcurrentTerminationBpl/Nconcurrent_FourLoopsAlternating_nonterminating.bpl [2023-10-12 17:18:07,769 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/ConcurrentTerminationBpl/Nconcurrent_FourLoopsAlternating_nonterminating.bpl' [2023-10-12 17:18:07,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-10-12 17:18:07,793 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2023-10-12 17:18:07,795 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-10-12 17:18:07,795 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-10-12 17:18:07,795 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-10-12 17:18:07,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:07" (1/1) ... [2023-10-12 17:18:07,816 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:07" (1/1) ... [2023-10-12 17:18:07,823 INFO L138 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2023-10-12 17:18:07,824 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-10-12 17:18:07,825 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-10-12 17:18:07,826 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-10-12 17:18:07,826 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-10-12 17:18:07,833 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:07" (1/1) ... [2023-10-12 17:18:07,833 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:07" (1/1) ... [2023-10-12 17:18:07,835 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:07" (1/1) ... [2023-10-12 17:18:07,835 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:07" (1/1) ... [2023-10-12 17:18:07,837 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:07" (1/1) ... [2023-10-12 17:18:07,841 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:07" (1/1) ... [2023-10-12 17:18:07,842 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:07" (1/1) ... [2023-10-12 17:18:07,842 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:07" (1/1) ... [2023-10-12 17:18:07,843 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-10-12 17:18:07,846 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-10-12 17:18:07,846 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-10-12 17:18:07,846 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-10-12 17:18:07,847 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:07" (1/1) ... [2023-10-12 17:18:07,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:07,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:07,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-10-12 17:18:07,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-10-12 17:18:07,924 INFO L124 BoogieDeclarations]: Specification and implementation of procedure four given in one single declaration [2023-10-12 17:18:07,924 INFO L130 BoogieDeclarations]: Found specification of procedure four [2023-10-12 17:18:07,924 INFO L138 BoogieDeclarations]: Found implementation of procedure four [2023-10-12 17:18:07,925 INFO L124 BoogieDeclarations]: Specification and implementation of procedure one given in one single declaration [2023-10-12 17:18:07,925 INFO L130 BoogieDeclarations]: Found specification of procedure one [2023-10-12 17:18:07,925 INFO L138 BoogieDeclarations]: Found implementation of procedure one [2023-10-12 17:18:07,925 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-10-12 17:18:07,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-10-12 17:18:07,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-10-12 17:18:07,926 INFO L124 BoogieDeclarations]: Specification and implementation of procedure three given in one single declaration [2023-10-12 17:18:07,926 INFO L130 BoogieDeclarations]: Found specification of procedure three [2023-10-12 17:18:07,926 INFO L138 BoogieDeclarations]: Found implementation of procedure three [2023-10-12 17:18:07,927 INFO L124 BoogieDeclarations]: Specification and implementation of procedure two given in one single declaration [2023-10-12 17:18:07,927 INFO L130 BoogieDeclarations]: Found specification of procedure two [2023-10-12 17:18:07,927 INFO L138 BoogieDeclarations]: Found implementation of procedure two [2023-10-12 17:18:07,928 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-10-12 17:18:07,977 INFO L236 CfgBuilder]: Building ICFG [2023-10-12 17:18:07,979 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-10-12 17:18:08,046 INFO L277 CfgBuilder]: Performing block encoding [2023-10-12 17:18:08,052 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-10-12 17:18:08,052 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-10-12 17:18:08,054 INFO L201 PluginConnector]: Adding new model Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 05:18:08 BoogieIcfgContainer [2023-10-12 17:18:08,054 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-10-12 17:18:08,055 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-10-12 17:18:08,055 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-10-12 17:18:08,059 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-10-12 17:18:08,059 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-10-12 17:18:08,059 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:07" (1/2) ... [2023-10-12 17:18:08,061 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@62b1a0cd and model type Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.10 05:18:08, skipping insertion in model container [2023-10-12 17:18:08,061 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-10-12 17:18:08,061 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "Nconcurrent_FourLoopsAlternating_nonterminating.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 05:18:08" (2/2) ... [2023-10-12 17:18:08,062 INFO L332 chiAutomizerObserver]: Analyzing ICFG Nconcurrent_FourLoopsAlternating_nonterminating.bpl [2023-10-12 17:18:08,146 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-10-12 17:18:08,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 46 transitions, 160 flow [2023-10-12 17:18:08,198 INFO L124 PetriNetUnfolderBase]: 21/54 cut-off events. [2023-10-12 17:18:08,198 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-10-12 17:18:08,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 54 events. 21/54 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 117 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 49. Up to 12 conditions per place. [2023-10-12 17:18:08,203 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 46 transitions, 160 flow [2023-10-12 17:18:08,208 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 38 transitions, 136 flow [2023-10-12 17:18:08,211 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-10-12 17:18:08,223 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 35 places, 38 transitions, 136 flow [2023-10-12 17:18:08,226 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 35 places, 38 transitions, 136 flow [2023-10-12 17:18:08,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 38 transitions, 136 flow [2023-10-12 17:18:08,238 INFO L124 PetriNetUnfolderBase]: 21/54 cut-off events. [2023-10-12 17:18:08,239 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-10-12 17:18:08,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 54 events. 21/54 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 117 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 49. Up to 12 conditions per place. [2023-10-12 17:18:08,241 INFO L119 LiptonReduction]: Number of co-enabled transitions 528 [2023-10-12 17:18:08,358 INFO L134 LiptonReduction]: Checked pairs total: 936 [2023-10-12 17:18:08,358 INFO L136 LiptonReduction]: Total number of compositions: 4 [2023-10-12 17:18:08,371 INFO L305 stractBuchiCegarLoop]: Interprodecural is true [2023-10-12 17:18:08,372 INFO L306 stractBuchiCegarLoop]: Hoare is false [2023-10-12 17:18:08,372 INFO L307 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-10-12 17:18:08,372 INFO L308 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-10-12 17:18:08,372 INFO L309 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-10-12 17:18:08,372 INFO L310 stractBuchiCegarLoop]: Difference is false [2023-10-12 17:18:08,372 INFO L311 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-10-12 17:18:08,372 INFO L315 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiPetriNetCegarLoop ======== [2023-10-12 17:18:08,373 INFO L84 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 31 places, 34 transitions, 128 flow [2023-10-12 17:18:08,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-10-12 17:18:08,377 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-10-12 17:18:08,377 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-10-12 17:18:08,377 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty language is not empty [2023-10-12 17:18:08,380 INFO L337 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-10-12 17:18:08,380 INFO L84 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 31 places, 34 transitions, 128 flow [2023-10-12 17:18:08,384 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-10-12 17:18:08,384 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-10-12 17:18:08,384 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-10-12 17:18:08,384 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty language is not empty [2023-10-12 17:18:08,388 INFO L748 eck$LassoCheckResult]: Stem: 43#[$Ultimate##0]true [60] $Ultimate##0-->L8: Formula: (= v_x_7 1) InVars {} OutVars{x=v_x_7} AuxVars[] AssignedVars[x] 45#[L8]true [91] L8-->L21: Formula: (= v_oneThread1of1ForFork3_thidvar0_2 1) InVars {} OutVars{oneThread1of1ForFork3_thidvar0=v_oneThread1of1ForFork3_thidvar0_2} AuxVars[] AssignedVars[oneThread1of1ForFork3_thidvar0] 47#[L8-1, L21]true [2023-10-12 17:18:08,388 INFO L750 eck$LassoCheckResult]: Loop: 47#[L8-1, L21]true [69] L21-->L22: Formula: (= v_x_4 1) InVars {x=v_x_4} OutVars{x=v_x_4} AuxVars[] AssignedVars[] 50#[L22, L8-1]true [71] L22-->L21: Formula: (= 2 v_x_5) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 47#[L8-1, L21]true [2023-10-12 17:18:08,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:08,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2912, now seen corresponding path program 1 times [2023-10-12 17:18:08,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:18:08,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865553517] [2023-10-12 17:18:08,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:18:08,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:18:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:08,454 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:18:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:08,469 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:18:08,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:08,472 INFO L85 PathProgramCache]: Analyzing trace with hash 3171, now seen corresponding path program 1 times [2023-10-12 17:18:08,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:18:08,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646912457] [2023-10-12 17:18:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:18:08,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:18:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:08,477 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:18:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:08,480 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:18:08,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:08,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2800642, now seen corresponding path program 1 times [2023-10-12 17:18:08,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:18:08,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419113367] [2023-10-12 17:18:08,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:18:08,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:18:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:08,487 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:18:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:08,491 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:18:08,562 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:18:08,563 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:18:08,563 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:18:08,563 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:18:08,563 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-10-12 17:18:08,563 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:08,563 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:18:08,563 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:18:08,563 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nconcurrent_FourLoopsAlternating_nonterminating.bpl_BEv2_Iteration1_Loop [2023-10-12 17:18:08,563 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:18:08,563 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:18:08,574 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:18:08,619 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:18:08,620 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-10-12 17:18:08,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:08,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:08,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-10-12 17:18:08,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-10-12 17:18:08,663 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:18:08,663 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:18:08,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2023-10-12 17:18:08,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:08,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:08,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-10-12 17:18:08,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-10-12 17:18:08,682 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:18:08,682 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:18:08,708 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-10-12 17:18:08,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-10-12 17:18:08,711 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:18:08,711 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:18:08,711 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:18:08,711 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:18:08,711 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-10-12 17:18:08,711 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:08,711 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:18:08,712 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:18:08,712 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nconcurrent_FourLoopsAlternating_nonterminating.bpl_BEv2_Iteration1_Loop [2023-10-12 17:18:08,712 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:18:08,712 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:18:08,713 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:18:08,737 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:18:08,741 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-10-12 17:18:08,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:08,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:08,745 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-10-12 17:18:08,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-10-12 17:18:08,756 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-10-12 17:18:08,765 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:18:08,766 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:18:08,766 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:18:08,766 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:18:08,766 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:18:08,769 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:18:08,769 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:18:08,781 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-10-12 17:18:08,786 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-10-12 17:18:08,787 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-10-12 17:18:08,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:08,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:08,793 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-10-12 17:18:08,798 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-10-12 17:18:08,798 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-10-12 17:18:08,799 INFO L513 LassoAnalysis]: Proved termination. [2023-10-12 17:18:08,799 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(x) = -2*x + 3 Supporting invariants [] [2023-10-12 17:18:08,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-10-12 17:18:08,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2023-10-12 17:18:08,810 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-10-12 17:18:08,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:18:08,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:18:08,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:18:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:18:08,860 WARN L260 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:18:08,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:18:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:18:08,945 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2023-10-12 17:18:08,947 INFO L74 BuchiComplementNCSB]: Start buchiComplementNCSB. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-10-12 17:18:09,204 INFO L82 BuchiComplementNCSB]: Finished buchiComplementNCSB. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) Result 7 states and 384 transitions. [2023-10-12 17:18:09,206 INFO L79 BuchiIntersect]: Starting Intersection [2023-10-12 17:18:09,211 INFO L86 BuchiIntersect]: Exiting Intersection [2023-10-12 17:18:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2023-10-12 17:18:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-10-12 17:18:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2023-10-12 17:18:09,223 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 190 transitions. Stem has 2 letters. Loop has 2 letters. [2023-10-12 17:18:09,223 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:09,223 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 190 transitions. Stem has 4 letters. Loop has 2 letters. [2023-10-12 17:18:09,223 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:09,224 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 190 transitions. Stem has 2 letters. Loop has 4 letters. [2023-10-12 17:18:09,224 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:09,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 512 transitions, 3008 flow [2023-10-12 17:18:09,724 INFO L124 PetriNetUnfolderBase]: 5339/7170 cut-off events. [2023-10-12 17:18:09,724 INFO L125 PetriNetUnfolderBase]: For 2897/2897 co-relation queries the response was YES. [2023-10-12 17:18:09,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16454 conditions, 7170 events. 5339/7170 cut-off events. For 2897/2897 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 33574 event pairs, 548 based on Foata normal form. 0/5021 useless extension candidates. Maximal degree in co-relation 13408. Up to 1616 conditions per place. [2023-10-12 17:18:09,745 INFO L82 GeneralOperation]: Start removeDeadBuchi. Operand has 45 places, 512 transitions, 3008 flow [2023-10-12 17:18:09,754 INFO L88 GeneralOperation]: Finished RemoveDeadBuchi, result has has 45 places, 512 transitions, 3008 flow [2023-10-12 17:18:09,754 INFO L430 stractBuchiCegarLoop]: Abstraction has has 45 places, 512 transitions, 3008 flow [2023-10-12 17:18:09,755 INFO L337 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-10-12 17:18:09,755 INFO L84 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 45 places, 512 transitions, 3008 flow [2023-10-12 17:18:09,776 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-10-12 17:18:09,777 INFO L124 PetriNetUnfolderBase]: 145/221 cut-off events. [2023-10-12 17:18:09,777 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-10-12 17:18:09,777 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty language is not empty [2023-10-12 17:18:09,778 INFO L748 eck$LassoCheckResult]: Stem: 43#[$Ultimate##0]true [60] $Ultimate##0-->L8: Formula: (= v_x_7 1) InVars {} OutVars{x=v_x_7} AuxVars[] AssignedVars[x] 45#[L8]true [91] L8-->L21: Formula: (= v_oneThread1of1ForFork3_thidvar0_2 1) InVars {} OutVars{oneThread1of1ForFork3_thidvar0=v_oneThread1of1ForFork3_thidvar0_2} AuxVars[] AssignedVars[oneThread1of1ForFork3_thidvar0] 47#[L8-1, L21]true [82] L8-1-->L29: Formula: (= v_twoThread1of1ForFork0_thidvar0_2 2) InVars {} OutVars{twoThread1of1ForFork0_thidvar0=v_twoThread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[twoThread1of1ForFork0_thidvar0] 105#[L29, L9, L21]true [77] L29-->L30: Formula: (= v_x_11 2) InVars {x=v_x_11} OutVars{x=v_x_11} AuxVars[] AssignedVars[] 107#[L9, L30, L21]true [79] L30-->L29: Formula: (= v_x_12 3) InVars {} OutVars{x=v_x_12} AuxVars[] AssignedVars[x] 105#[L29, L9, L21]true [2023-10-12 17:18:09,778 INFO L750 eck$LassoCheckResult]: Loop: 105#[L29, L9, L21]true [69] L21-->L22: Formula: (= v_x_4 1) InVars {x=v_x_4} OutVars{x=v_x_4} AuxVars[] AssignedVars[] 111#[L9, L29, L22]true [71] L22-->L21: Formula: (= 2 v_x_5) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 105#[L29, L9, L21]true [2023-10-12 17:18:09,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:09,780 INFO L85 PathProgramCache]: Analyzing trace with hash 86832660, now seen corresponding path program 1 times [2023-10-12 17:18:09,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:18:09,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63543313] [2023-10-12 17:18:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:18:09,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:18:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:18:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:18:09,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-10-12 17:18:09,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63543313] [2023-10-12 17:18:09,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63543313] provided 1 perfect and 0 imperfect interpolant sequences [2023-10-12 17:18:09,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-10-12 17:18:09,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-10-12 17:18:09,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966229667] [2023-10-12 17:18:09,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-10-12 17:18:09,837 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-10-12 17:18:09,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash 3171, now seen corresponding path program 2 times [2023-10-12 17:18:09,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:18:09,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417798421] [2023-10-12 17:18:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:18:09,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:18:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:09,855 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:18:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:09,863 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:18:09,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2023-10-12 17:18:09,881 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:18:09,882 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:18:09,882 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:18:09,882 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:18:09,882 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-10-12 17:18:09,882 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:09,882 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:18:09,882 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:18:09,882 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nconcurrent_FourLoopsAlternating_nonterminating.bpl_BEv2_Iteration2_Loop [2023-10-12 17:18:09,882 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:18:09,882 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:18:09,883 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:18:09,902 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:18:09,902 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-10-12 17:18:09,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:09,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:09,903 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-10-12 17:18:09,916 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:18:09,916 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:18:09,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-10-12 17:18:09,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2023-10-12 17:18:09,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:09,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:09,942 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-10-12 17:18:09,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-10-12 17:18:09,946 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:18:09,946 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:18:09,969 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-10-12 17:18:09,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-10-12 17:18:09,975 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:18:09,975 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:18:09,975 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:18:09,975 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:18:09,975 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-10-12 17:18:09,975 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:09,975 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:18:09,975 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:18:09,975 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nconcurrent_FourLoopsAlternating_nonterminating.bpl_BEv2_Iteration2_Loop [2023-10-12 17:18:09,976 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:18:09,976 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:18:09,976 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:18:09,998 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:18:09,998 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-10-12 17:18:09,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:09,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:10,000 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-10-12 17:18:10,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-10-12 17:18:10,006 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-10-12 17:18:10,014 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:18:10,014 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:18:10,014 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:18:10,014 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:18:10,014 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:18:10,015 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:18:10,016 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:18:10,029 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-10-12 17:18:10,031 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-10-12 17:18:10,031 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-10-12 17:18:10,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:10,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:10,033 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-10-12 17:18:10,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-10-12 17:18:10,036 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-10-12 17:18:10,036 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-10-12 17:18:10,036 INFO L513 LassoAnalysis]: Proved termination. [2023-10-12 17:18:10,037 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(x) = -2*x + 3 Supporting invariants [] [2023-10-12 17:18:10,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2023-10-12 17:18:10,043 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-10-12 17:18:10,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:18:10,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:18:10,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:18:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:18:10,083 WARN L260 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:18:10,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:18:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:18:10,098 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2023-10-12 17:18:10,098 INFO L74 BuchiComplementNCSB]: Start buchiComplementNCSB. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-10-12 17:18:10,267 INFO L82 BuchiComplementNCSB]: Finished buchiComplementNCSB. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) Result 7 states and 384 transitions. [2023-10-12 17:18:10,268 INFO L79 BuchiIntersect]: Starting Intersection [2023-10-12 17:18:10,321 INFO L86 BuchiIntersect]: Exiting Intersection [2023-10-12 17:18:10,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2023-10-12 17:18:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-10-12 17:18:10,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2023-10-12 17:18:10,324 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 190 transitions. Stem has 5 letters. Loop has 2 letters. [2023-10-12 17:18:10,324 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:10,324 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 190 transitions. Stem has 7 letters. Loop has 2 letters. [2023-10-12 17:18:10,324 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:10,325 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 190 transitions. Stem has 5 letters. Loop has 4 letters. [2023-10-12 17:18:10,325 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:10,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 7832 transitions, 62352 flow [2023-10-12 17:18:11,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2023-10-12 17:18:14,469 INFO L124 PetriNetUnfolderBase]: 17368/23137 cut-off events. [2023-10-12 17:18:14,469 INFO L125 PetriNetUnfolderBase]: For 9483/9483 co-relation queries the response was YES. [2023-10-12 17:18:14,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76014 conditions, 23137 events. 17368/23137 cut-off events. For 9483/9483 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 124188 event pairs, 859 based on Foata normal form. 0/15681 useless extension candidates. Maximal degree in co-relation 63322. Up to 8975 conditions per place. [2023-10-12 17:18:14,508 INFO L82 GeneralOperation]: Start removeDeadBuchi. Operand has 59 places, 7832 transitions, 62352 flow [2023-10-12 17:18:14,610 INFO L88 GeneralOperation]: Finished RemoveDeadBuchi, result has has 59 places, 7832 transitions, 62352 flow [2023-10-12 17:18:14,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-10-12 17:18:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-10-12 17:18:14,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-10-12 17:18:14,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 7832 transitions, 62352 flow. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-10-12 17:18:14,616 INFO L124 encePairwiseOnDemand]: Subtrahend is not yet constructed. Will not use universal subtrahend loopers optimization. [2023-10-12 17:18:14,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-10-12 17:18:22,192 INFO L124 PetriNetUnfolderBase]: 19057/25783 cut-off events. [2023-10-12 17:18:22,192 INFO L125 PetriNetUnfolderBase]: For 11851/11851 co-relation queries the response was YES. [2023-10-12 17:18:22,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110742 conditions, 25783 events. 19057/25783 cut-off events. For 11851/11851 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 140716 event pairs, 266 based on Foata normal form. 0/18447 useless extension candidates. Maximal degree in co-relation 90752. Up to 19186 conditions per place. [2023-10-12 17:18:22,390 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 893 selfloop transitions, 70 changer transitions 176/1139 dead transitions. [2023-10-12 17:18:22,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 1139 transitions, 11167 flow [2023-10-12 17:18:22,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 1139 transitions, 11167 flow [2023-10-12 17:18:24,191 INFO L124 PetriNetUnfolderBase]: 19057/25783 cut-off events. [2023-10-12 17:18:24,191 INFO L125 PetriNetUnfolderBase]: For 11851/11851 co-relation queries the response was YES. [2023-10-12 17:18:24,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110742 conditions, 25783 events. 19057/25783 cut-off events. For 11851/11851 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 140748 event pairs, 266 based on Foata normal form. 0/18447 useless extension candidates. Maximal degree in co-relation 90752. Up to 19186 conditions per place. [2023-10-12 17:18:24,222 INFO L82 GeneralOperation]: Start removeDeadBuchi. Operand has 58 places, 1139 transitions, 11167 flow [2023-10-12 17:18:24,234 INFO L88 GeneralOperation]: Finished RemoveDeadBuchi, result has has 58 places, 1139 transitions, 11167 flow [2023-10-12 17:18:24,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-10-12 17:18:24,236 INFO L430 stractBuchiCegarLoop]: Abstraction has has 58 places, 1139 transitions, 11167 flow [2023-10-12 17:18:24,236 INFO L337 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-10-12 17:18:24,236 INFO L84 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 58 places, 1139 transitions, 11167 flow [2023-10-12 17:18:24,364 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-10-12 17:18:24,364 INFO L124 PetriNetUnfolderBase]: 1043/1443 cut-off events. [2023-10-12 17:18:24,364 INFO L125 PetriNetUnfolderBase]: For 482/482 co-relation queries the response was YES. [2023-10-12 17:18:24,364 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty language is not empty [2023-10-12 17:18:24,365 INFO L748 eck$LassoCheckResult]: Stem: 43#[$Ultimate##0]true [60] $Ultimate##0-->L8: Formula: (= v_x_7 1) InVars {} OutVars{x=v_x_7} AuxVars[] AssignedVars[x] 45#[L8]true [91] L8-->L21: Formula: (= v_oneThread1of1ForFork3_thidvar0_2 1) InVars {} OutVars{oneThread1of1ForFork3_thidvar0=v_oneThread1of1ForFork3_thidvar0_2} AuxVars[] AssignedVars[oneThread1of1ForFork3_thidvar0] 47#[L8-1, L21]true [69] L21-->L22: Formula: (= v_x_4 1) InVars {x=v_x_4} OutVars{x=v_x_4} AuxVars[] AssignedVars[] 50#[L22, L8-1]true [82] L8-1-->L29: Formula: (= v_twoThread1of1ForFork0_thidvar0_2 2) InVars {} OutVars{twoThread1of1ForFork0_thidvar0=v_twoThread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[twoThread1of1ForFork0_thidvar0] 111#[L9, L29, L22]true [85] L9-->L37: Formula: (= v_threeThread1of1ForFork1_thidvar0_2 3) InVars {} OutVars{threeThread1of1ForFork1_thidvar0=v_threeThread1of1ForFork1_thidvar0_2} AuxVars[] AssignedVars[threeThread1of1ForFork1_thidvar0] 170#[L29, L22, L10, L37]true [71] L22-->L21: Formula: (= 2 v_x_5) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 172#[L29, L10, L37, L21]true [73] L37-->L38: Formula: (= 3 v_x_8) InVars {x=v_x_8} OutVars{x=v_x_8} AuxVars[] AssignedVars[] 174#[L29, L10, L38, L21]true [75] L38-->L37: Formula: (= v_x_9 4) InVars {} OutVars{x=v_x_9} AuxVars[] AssignedVars[x] 172#[L29, L10, L37, L21]true [2023-10-12 17:18:24,365 INFO L750 eck$LassoCheckResult]: Loop: 172#[L29, L10, L37, L21]true [73] L37-->L38: Formula: (= 3 v_x_8) InVars {x=v_x_8} OutVars{x=v_x_8} AuxVars[] AssignedVars[] 174#[L29, L10, L38, L21]true [75] L38-->L37: Formula: (= v_x_9 4) InVars {} OutVars{x=v_x_9} AuxVars[] AssignedVars[x] 172#[L29, L10, L37, L21]true [2023-10-12 17:18:24,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:24,366 INFO L85 PathProgramCache]: Analyzing trace with hash 894149825, now seen corresponding path program 1 times [2023-10-12 17:18:24,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:18:24,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926067628] [2023-10-12 17:18:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:18:24,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:18:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:18:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:18:24,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-10-12 17:18:24,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926067628] [2023-10-12 17:18:24,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926067628] provided 1 perfect and 0 imperfect interpolant sequences [2023-10-12 17:18:24,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-10-12 17:18:24,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-10-12 17:18:24,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978015648] [2023-10-12 17:18:24,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-10-12 17:18:24,407 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-10-12 17:18:24,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:24,407 INFO L85 PathProgramCache]: Analyzing trace with hash 3299, now seen corresponding path program 1 times [2023-10-12 17:18:24,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:18:24,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657109186] [2023-10-12 17:18:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:18:24,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:18:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:24,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:18:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:24,415 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:18:24,427 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:18:24,427 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:18:24,427 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:18:24,428 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:18:24,428 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-10-12 17:18:24,428 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:24,428 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:18:24,428 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:18:24,428 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nconcurrent_FourLoopsAlternating_nonterminating.bpl_BEv2_Iteration3_Loop [2023-10-12 17:18:24,428 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:18:24,428 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:18:24,428 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:18:24,446 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:18:24,446 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-10-12 17:18:24,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:24,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:24,448 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-10-12 17:18:24,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-10-12 17:18:24,456 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:18:24,456 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:18:24,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-10-12 17:18:24,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:24,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:24,482 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-10-12 17:18:24,488 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:18:24,488 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:18:24,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-10-12 17:18:24,510 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-10-12 17:18:24,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-10-12 17:18:24,517 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:18:24,517 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:18:24,517 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:18:24,517 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:18:24,517 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-10-12 17:18:24,517 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:24,517 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:18:24,517 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:18:24,517 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nconcurrent_FourLoopsAlternating_nonterminating.bpl_BEv2_Iteration3_Loop [2023-10-12 17:18:24,517 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:18:24,517 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:18:24,518 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:18:24,534 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:18:24,534 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-10-12 17:18:24,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:24,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:24,536 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-10-12 17:18:24,548 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-10-12 17:18:24,555 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:18:24,555 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:18:24,556 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:18:24,556 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:18:24,556 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:18:24,557 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:18:24,557 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:18:24,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2023-10-12 17:18:24,568 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-10-12 17:18:24,581 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-10-12 17:18:24,582 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-10-12 17:18:24,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:24,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:24,583 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-10-12 17:18:24,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-10-12 17:18:24,613 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-10-12 17:18:24,613 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-10-12 17:18:24,613 INFO L513 LassoAnalysis]: Proved termination. [2023-10-12 17:18:24,613 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(x) = -2*x + 7 Supporting invariants [] [2023-10-12 17:18:24,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2023-10-12 17:18:24,617 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-10-12 17:18:24,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:18:24,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:18:24,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:18:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:18:24,650 WARN L260 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:18:24,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:18:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:18:24,659 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2023-10-12 17:18:24,660 INFO L74 BuchiComplementNCSB]: Start buchiComplementNCSB. Operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-10-12 17:18:24,857 INFO L82 BuchiComplementNCSB]: Finished buchiComplementNCSB. Operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) Result 9 states and 486 transitions. [2023-10-12 17:18:24,857 INFO L79 BuchiIntersect]: Starting Intersection [2023-10-12 17:18:24,986 INFO L86 BuchiIntersect]: Exiting Intersection [2023-10-12 17:18:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2023-10-12 17:18:24,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-10-12 17:18:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 240 transitions. [2023-10-12 17:18:24,991 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 240 transitions. Stem has 8 letters. Loop has 2 letters. [2023-10-12 17:18:24,991 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:24,991 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 240 transitions. Stem has 10 letters. Loop has 2 letters. [2023-10-12 17:18:24,992 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:24,992 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 240 transitions. Stem has 8 letters. Loop has 4 letters. [2023-10-12 17:18:24,992 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:24,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 22072 transitions, 261820 flow [2023-10-12 17:18:26,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-10-12 17:22:05,090 INFO L124 PetriNetUnfolderBase]: 95250/128689 cut-off events. [2023-10-12 17:22:05,090 INFO L125 PetriNetUnfolderBase]: For 59848/59848 co-relation queries the response was YES. [2023-10-12 17:22:05,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680457 conditions, 128689 events. 95250/128689 cut-off events. For 59848/59848 co-relation queries the response was YES. Maximal size of possible extension queue 6564. Compared 857054 event pairs, 307 based on Foata normal form. 0/91228 useless extension candidates. Maximal degree in co-relation 542445. Up to 97032 conditions per place. [2023-10-12 17:22:05,243 INFO L82 GeneralOperation]: Start removeDeadBuchi. Operand has 76 places, 22072 transitions, 261820 flow [2023-10-12 17:22:05,509 INFO L88 GeneralOperation]: Finished RemoveDeadBuchi, result has has 76 places, 22072 transitions, 261820 flow [2023-10-12 17:22:05,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-10-12 17:22:05,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-10-12 17:22:05,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-10-12 17:22:05,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 22072 transitions, 261820 flow. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-10-12 17:22:05,510 INFO L124 encePairwiseOnDemand]: Subtrahend is not yet constructed. Will not use universal subtrahend loopers optimization. [2023-10-12 17:22:05,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-10-12 17:22:41,692 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-10-12 17:22:41,703 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer has thrown an exception: java.lang.AssertionError: clock still running: AutomataDifference at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopStatisticsGenerator.getValue(CegarLoopStatisticsGenerator.java:146) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiCegarLoopBenchmarkGenerator.getValue(BuchiCegarLoopBenchmarkGenerator.java:131) at de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData.aggregateBenchmarkData(StatisticsData.java:60) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerTimingBenchmark.(BuchiAutomizerTimingBenchmark.java:39) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.doTerminationAnalysis(BuchiAutomizerObserver.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.finish(BuchiAutomizerObserver.java:341) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-10-12 17:22:41,705 INFO L158 Benchmark]: Toolchain (without parser) took 273912.02ms. Allocated memory was 196.1MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 147.3MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2023-10-12 17:22:41,705 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.27ms. Allocated memory is still 196.1MB. Free memory is still 148.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-10-12 17:22:41,706 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.65ms. Allocated memory is still 196.1MB. Free memory was 147.2MB in the beginning and 145.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-10-12 17:22:41,706 INFO L158 Benchmark]: Boogie Preprocessor took 18.14ms. Allocated memory is still 196.1MB. Free memory was 145.6MB in the beginning and 144.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-10-12 17:22:41,706 INFO L158 Benchmark]: RCFGBuilder took 208.66ms. Allocated memory is still 196.1MB. Free memory was 144.6MB in the beginning and 135.4MB in the end (delta: 9.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-10-12 17:22:41,707 INFO L158 Benchmark]: BuchiAutomizer took 273649.29ms. Allocated memory was 196.1MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 135.3MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2023-10-12 17:22:41,708 INFO L338 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 0.27ms. Allocated memory is still 196.1MB. Free memory is still 148.2MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.65ms. Allocated memory is still 196.1MB. Free memory was 147.2MB in the beginning and 145.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.14ms. Allocated memory is still 196.1MB. Free memory was 145.6MB in the beginning and 144.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 208.66ms. Allocated memory is still 196.1MB. Free memory was 144.6MB in the beginning and 135.4MB in the end (delta: 9.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 273649.29ms. Allocated memory was 196.1MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 135.3MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Decomposition not yet finished * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 35 PlacesBefore, 31 PlacesAfterwards, 38 TransitionsBefore, 34 TransitionsAfterwards, 528 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 936 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 412, independent: 376, independent conditional: 0, independent unconditional: 376, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 285, independent: 270, independent conditional: 0, independent unconditional: 270, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 285, independent: 259, independent conditional: 0, independent unconditional: 259, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 26, independent: 11, independent conditional: 0, independent unconditional: 11, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 54, independent: 25, independent conditional: 0, independent unconditional: 25, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 412, independent: 106, independent conditional: 0, independent unconditional: 106, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 285, unknown conditional: 0, unknown unconditional: 285] , Statistics on independence cache: Total cache size (in pairs): 151, Positive cache size: 140, Positive conditional cache size: 0, Positive unconditional cache size: 140, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: AssertionError: clock still running: AutomataDifference de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: AssertionError: clock still running: AutomataDifference: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopStatisticsGenerator.getValue(CegarLoopStatisticsGenerator.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown