/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/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.fs.rabin-petrinet-4c29625-m [2023-10-12 17:30:03,993 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-10-12 17:30:04,044 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 17:30:04,063 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-10-12 17:30:04,063 INFO L135 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-10-12 17:30:04,064 INFO L137 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-10-12 17:30:04,065 INFO L135 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-10-12 17:30:04,065 INFO L137 SettingsManager]: * Create parallel compositions if possible=false [2023-10-12 17:30:04,066 INFO L137 SettingsManager]: * Use SBE=true [2023-10-12 17:30:04,069 INFO L135 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-10-12 17:30:04,069 INFO L137 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-10-12 17:30:04,069 INFO L137 SettingsManager]: * Use old map elimination=false [2023-10-12 17:30:04,069 INFO L137 SettingsManager]: * Use external solver (rank synthesis)=false [2023-10-12 17:30:04,070 INFO L137 SettingsManager]: * Use only trivial implications for array writes=true [2023-10-12 17:30:04,071 INFO L137 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-10-12 17:30:04,071 INFO L135 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-10-12 17:30:04,071 INFO L137 SettingsManager]: * sizeof long=4 [2023-10-12 17:30:04,071 INFO L137 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-10-12 17:30:04,071 INFO L137 SettingsManager]: * Overapproximate operations on floating types=true [2023-10-12 17:30:04,072 INFO L137 SettingsManager]: * sizeof POINTER=4 [2023-10-12 17:30:04,072 INFO L137 SettingsManager]: * Check division by zero=IGNORE [2023-10-12 17:30:04,073 INFO L137 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-10-12 17:30:04,073 INFO L137 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-10-12 17:30:04,073 INFO L137 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-10-12 17:30:04,073 INFO L137 SettingsManager]: * sizeof long double=12 [2023-10-12 17:30:04,073 INFO L137 SettingsManager]: * Check if freed pointer was valid=false [2023-10-12 17:30:04,073 INFO L137 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-10-12 17:30:04,074 INFO L137 SettingsManager]: * Use constant arrays=true [2023-10-12 17:30:04,074 INFO L137 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-10-12 17:30:04,074 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-10-12 17:30:04,075 INFO L137 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-10-12 17:30:04,075 INFO L135 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-10-12 17:30:04,075 INFO L137 SettingsManager]: * Trace refinement strategy=CAMEL [2023-10-12 17:30:04,076 INFO L135 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-10-12 17:30:04,076 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: Automaton type for concurrent programs -> BUCHI_PETRI_NET [2023-10-12 17:30:04,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-10-12 17:30:04,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-10-12 17:30:04,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-10-12 17:30:04,307 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-10-12 17:30:04,307 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-10-12 17:30:04,308 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2023-10-12 17:30:04,309 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2023-10-12 17:30:04,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-10-12 17:30:04,337 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2023-10-12 17:30:04,339 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-10-12 17:30:04,339 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-10-12 17:30:04,339 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-10-12 17:30:04,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:30:04" (1/1) ... [2023-10-12 17:30:04,359 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:30:04" (1/1) ... [2023-10-12 17:30:04,365 INFO L138 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2023-10-12 17:30:04,366 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-10-12 17:30:04,367 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-10-12 17:30:04,368 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-10-12 17:30:04,368 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-10-12 17:30:04,374 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:30:04" (1/1) ... [2023-10-12 17:30:04,375 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:30:04" (1/1) ... [2023-10-12 17:30:04,376 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:30:04" (1/1) ... [2023-10-12 17:30:04,376 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:30:04" (1/1) ... [2023-10-12 17:30:04,379 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:30:04" (1/1) ... [2023-10-12 17:30:04,381 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:30:04" (1/1) ... [2023-10-12 17:30:04,382 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:30:04" (1/1) ... [2023-10-12 17:30:04,382 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:30:04" (1/1) ... [2023-10-12 17:30:04,383 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-10-12 17:30:04,385 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-10-12 17:30:04,385 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-10-12 17:30:04,385 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-10-12 17:30:04,386 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:30:04" (1/1) ... [2023-10-12 17:30:04,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:30:04,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:30:04,431 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 17:30:04,451 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 17:30:04,462 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2023-10-12 17:30:04,465 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-10-12 17:30:04,465 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-10-12 17:30:04,465 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2023-10-12 17:30:04,465 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-10-12 17:30:04,465 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-10-12 17:30:04,465 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-10-12 17:30:04,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-10-12 17:30:04,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-10-12 17:30:04,467 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 17:30:04,516 INFO L236 CfgBuilder]: Building ICFG [2023-10-12 17:30:04,518 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-10-12 17:30:04,609 INFO L277 CfgBuilder]: Performing block encoding [2023-10-12 17:30:04,620 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-10-12 17:30:04,621 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-10-12 17:30:04,622 INFO L201 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 05:30:04 BoogieIcfgContainer [2023-10-12 17:30:04,622 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-10-12 17:30:04,623 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-10-12 17:30:04,623 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-10-12 17:30:04,626 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-10-12 17:30:04,626 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-10-12 17:30:04,626 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:30:04" (1/2) ... [2023-10-12 17:30:04,627 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5aab7b61 and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.10 05:30:04, skipping insertion in model container [2023-10-12 17:30:04,628 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-10-12 17:30:04,628 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 05:30:04" (2/2) ... [2023-10-12 17:30:04,633 INFO L332 chiAutomizerObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2023-10-12 17:30:04,677 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-10-12 17:30:04,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 25 transitions, 66 flow [2023-10-12 17:30:04,712 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-10-12 17:30:04,725 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-10-12 17:30:04,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 17 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2023-10-12 17:30:04,730 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 25 transitions, 66 flow [2023-10-12 17:30:04,733 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 21 transitions, 54 flow [2023-10-12 17:30:04,737 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-10-12 17:30:04,751 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 26 places, 21 transitions, 54 flow [2023-10-12 17:30:04,753 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 26 places, 21 transitions, 54 flow [2023-10-12 17:30:04,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 54 flow [2023-10-12 17:30:04,757 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-10-12 17:30:04,758 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-10-12 17:30:04,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 17 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2023-10-12 17:30:04,758 INFO L119 LiptonReduction]: Number of co-enabled transitions 48 [2023-10-12 17:30:04,958 INFO L134 LiptonReduction]: Checked pairs total: 48 [2023-10-12 17:30:04,959 INFO L136 LiptonReduction]: Total number of compositions: 11 [2023-10-12 17:30:04,967 INFO L305 stractBuchiCegarLoop]: Interprodecural is true [2023-10-12 17:30:04,968 INFO L306 stractBuchiCegarLoop]: Hoare is false [2023-10-12 17:30:04,968 INFO L307 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-10-12 17:30:04,968 INFO L308 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-10-12 17:30:04,968 INFO L309 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-10-12 17:30:04,968 INFO L310 stractBuchiCegarLoop]: Difference is false [2023-10-12 17:30:04,968 INFO L311 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-10-12 17:30:04,968 INFO L315 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiPetriNetCegarLoop ======== [2023-10-12 17:30:04,969 INFO L84 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 16 places, 11 transitions, 34 flow [2023-10-12 17:30:04,971 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-10-12 17:30:04,971 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-10-12 17:30:04,971 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-10-12 17:30:04,972 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty language is not empty [2023-10-12 17:30:04,974 INFO L337 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-10-12 17:30:04,974 INFO L84 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 16 places, 11 transitions, 34 flow [2023-10-12 17:30:04,974 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-10-12 17:30:04,975 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-10-12 17:30:04,975 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-10-12 17:30:04,975 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty language is not empty [2023-10-12 17:30:04,992 INFO L748 eck$LassoCheckResult]: Stem: 32#[$Ultimate##0]true [78] $Ultimate##0-->L46: Formula: (and (= v_j2_20 0) (= v_counter_32 0) (= v_M1_10 v_M2_11) (= v_j1_18 0) (< 0 v_M2_11)) InVars {counter=v_counter_32, j2=v_j2_20, j1=v_j1_18, M1=v_M1_10, M2=v_M2_11} OutVars{counter=v_counter_32, j2=v_j2_20, j1=v_j1_18, M1=v_M1_10, M2=v_M2_11} AuxVars[] AssignedVars[] 34#[L46]true [62] L46-->L20-1: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0] 36#[L46-1, L20-1]true [2023-10-12 17:30:04,992 INFO L750 eck$LassoCheckResult]: Loop: 36#[L46-1, L20-1]true [73] L20-1-->L20-1: Formula: (and (= v_counter_20 (+ v_counter_21 v_C_7)) (< v_j1_13 v_M1_8) (= (+ v_j1_13 1) v_j1_12)) InVars {counter=v_counter_21, j1=v_j1_13, M1=v_M1_8, C=v_C_7} OutVars{counter=v_counter_20, j1=v_j1_12, M1=v_M1_8, C=v_C_7} AuxVars[] AssignedVars[counter, j1] 36#[L46-1, L20-1]true [2023-10-12 17:30:04,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:30:04,996 INFO L85 PathProgramCache]: Analyzing trace with hash 3441, now seen corresponding path program 1 times [2023-10-12 17:30:05,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:30:05,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310396646] [2023-10-12 17:30:05,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:30:05,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:30:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:30:05,063 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:30:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:30:05,121 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:30:05,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:30:05,123 INFO L85 PathProgramCache]: Analyzing trace with hash 104, now seen corresponding path program 1 times [2023-10-12 17:30:05,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:30:05,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154146874] [2023-10-12 17:30:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:30:05,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:30:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:30:05,128 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:30:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:30:05,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:30:05,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:30:05,132 INFO L85 PathProgramCache]: Analyzing trace with hash 106744, now seen corresponding path program 1 times [2023-10-12 17:30:05,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:30:05,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834189017] [2023-10-12 17:30:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:30:05,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:30:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:30:05,145 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:30:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:30:05,151 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:30:05,187 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:30:05,188 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:30:05,188 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:30:05,188 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:30:05,189 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-10-12 17:30:05,189 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:30:05,189 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:30:05,189 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:30:05,189 INFO L133 ssoRankerPreferences]: Filename of dumped script: nonblocking-counter-alt2.wvr.bpl_BEv2_Iteration1_Loop [2023-10-12 17:30:05,189 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:30:05,189 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:30:05,199 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 17:30:05,211 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 17:30:05,247 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:30:05,247 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-10-12 17:30:05,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:30:05,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:30:05,269 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 17:30:05,270 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 17:30:05,272 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:30:05,272 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:30:05,283 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-10-12 17:30:05,284 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {counter=0, C=0} Honda state: {counter=0, C=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-10-12 17:30:05,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-10-12 17:30:05,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:30:05,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:30:05,289 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 17:30:05,289 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 17:30:05,293 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:30:05,293 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:30:05,304 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 17:30:05,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:30:05,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:30:05,305 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 17:30:05,306 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 17:30:05,316 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:30:05,317 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:30:05,411 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-10-12 17:30:05,415 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 17:30:05,415 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:30:05,415 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:30:05,416 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:30:05,416 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:30:05,416 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-10-12 17:30:05,416 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:30:05,416 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:30:05,416 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:30:05,416 INFO L133 ssoRankerPreferences]: Filename of dumped script: nonblocking-counter-alt2.wvr.bpl_BEv2_Iteration1_Loop [2023-10-12 17:30:05,416 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:30:05,416 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:30:05,417 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 17:30:05,422 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 17:30:05,467 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:30:05,470 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-10-12 17:30:05,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:30:05,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:30:05,473 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 17:30:05,475 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 17:30:05,476 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 17:30:05,484 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:30:05,484 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:30:05,485 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:30:05,485 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:30:05,485 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:30:05,488 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:30:05,488 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:30:05,503 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-10-12 17:30:05,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-10-12 17:30:05,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:30:05,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:30:05,512 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 17:30:05,515 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 17:30:05,516 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 17:30:05,523 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:30:05,524 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:30:05,524 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:30:05,524 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:30:05,524 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:30:05,525 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:30:05,525 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:30:05,541 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-10-12 17:30:05,557 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2023-10-12 17:30:05,557 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-10-12 17:30:05,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:30:05,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:30:05,561 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 17:30:05,561 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 17:30:05,564 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-10-12 17:30:05,564 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-10-12 17:30:05,565 INFO L513 LassoAnalysis]: Proved termination. [2023-10-12 17:30:05,565 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(j1, M1) = -1*j1 + 1*M1 Supporting invariants [] [2023-10-12 17:30:05,568 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 17:30:05,571 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-10-12 17:30:05,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:30:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:30:05,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:30:05,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:30:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:30:05,623 WARN L260 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:30:05,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:30:05,625 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 17:30:05,648 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2023-10-12 17:30:05,649 INFO L74 BuchiComplementNCSB]: Start buchiComplementNCSB. Operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 17:30:05,710 INFO L82 BuchiComplementNCSB]: Finished buchiComplementNCSB. Operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 5 states and 208 transitions. [2023-10-12 17:30:05,711 INFO L79 BuchiIntersect]: Starting Intersection [2023-10-12 17:30:05,713 INFO L86 BuchiIntersect]: Exiting Intersection [2023-10-12 17:30:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2023-10-12 17:30:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 17:30:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2023-10-12 17:30:05,721 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 144 transitions. Stem has 2 letters. Loop has 1 letters. [2023-10-12 17:30:05,722 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:30:05,722 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 144 transitions. Stem has 3 letters. Loop has 1 letters. [2023-10-12 17:30:05,722 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:30:05,722 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 144 transitions. Stem has 2 letters. Loop has 2 letters. [2023-10-12 17:30:05,722 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:30:05,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 124 transitions, 640 flow [2023-10-12 17:30:05,731 INFO L124 PetriNetUnfolderBase]: 31/63 cut-off events. [2023-10-12 17:30:05,731 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-10-12 17:30:05,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 63 events. 31/63 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 145 event pairs, 2 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 96. Up to 21 conditions per place. [2023-10-12 17:30:05,732 INFO L82 GeneralOperation]: Start removeDeadBuchi. Operand has 26 places, 124 transitions, 640 flow [2023-10-12 17:30:05,734 INFO L88 GeneralOperation]: Finished RemoveDeadBuchi, result has has 26 places, 124 transitions, 640 flow [2023-10-12 17:30:05,734 INFO L430 stractBuchiCegarLoop]: Abstraction has has 26 places, 124 transitions, 640 flow [2023-10-12 17:30:05,734 INFO L337 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-10-12 17:30:05,735 INFO L84 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 26 places, 124 transitions, 640 flow [2023-10-12 17:30:05,742 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-10-12 17:30:05,743 INFO L124 PetriNetUnfolderBase]: 16/28 cut-off events. [2023-10-12 17:30:05,743 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-10-12 17:30:05,743 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty language is not empty [2023-10-12 17:30:05,743 INFO L748 eck$LassoCheckResult]: Stem: 32#[$Ultimate##0]true [78] $Ultimate##0-->L46: Formula: (and (= v_j2_20 0) (= v_counter_32 0) (= v_M1_10 v_M2_11) (= v_j1_18 0) (< 0 v_M2_11)) InVars {counter=v_counter_32, j2=v_j2_20, j1=v_j1_18, M1=v_M1_10, M2=v_M2_11} OutVars{counter=v_counter_32, j2=v_j2_20, j1=v_j1_18, M1=v_M1_10, M2=v_M2_11} AuxVars[] AssignedVars[] 34#[L46]true [62] L46-->L20-1: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0] 36#[L46-1, L20-1]true [65] L46-1-->L31-1: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1] 81#[L47, L20-1, L31-1]true [2023-10-12 17:30:05,743 INFO L750 eck$LassoCheckResult]: Loop: 81#[L47, L20-1, L31-1]true [75] L31-1-->L31-1: Formula: (let ((.cse0 (< 0 v_counter_25))) (and (= (ite .cse0 (+ v_j2_15 1) v_j2_15) v_j2_14) (< v_j2_15 v_M2_9) (= v_counter_24 (ite .cse0 (+ v_counter_25 (* (- 1) v_C_9)) v_counter_25)))) InVars {counter=v_counter_25, j2=v_j2_15, M2=v_M2_9, C=v_C_9} OutVars{counter=v_counter_24, j2=v_j2_14, M2=v_M2_9, C=v_C_9} AuxVars[] AssignedVars[counter, j2] 81#[L47, L20-1, L31-1]true [75] L31-1-->L31-1: Formula: (let ((.cse0 (< 0 v_counter_25))) (and (= (ite .cse0 (+ v_j2_15 1) v_j2_15) v_j2_14) (< v_j2_15 v_M2_9) (= v_counter_24 (ite .cse0 (+ v_counter_25 (* (- 1) v_C_9)) v_counter_25)))) InVars {counter=v_counter_25, j2=v_j2_15, M2=v_M2_9, C=v_C_9} OutVars{counter=v_counter_24, j2=v_j2_14, M2=v_M2_9, C=v_C_9} AuxVars[] AssignedVars[counter, j2] 81#[L47, L20-1, L31-1]true [2023-10-12 17:30:05,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:30:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash 106736, now seen corresponding path program 1 times [2023-10-12 17:30:05,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:30:05,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62486180] [2023-10-12 17:30:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:30:05,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:30:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:30:05,748 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:30:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:30:05,751 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:30:05,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:30:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash 3361, now seen corresponding path program 1 times [2023-10-12 17:30:05,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:30:05,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740570225] [2023-10-12 17:30:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:30:05,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:30:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:30:05,774 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:30:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:30:05,785 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:30:05,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:30:05,786 INFO L85 PathProgramCache]: Analyzing trace with hash 102575696, now seen corresponding path program 1 times [2023-10-12 17:30:05,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:30:05,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079354488] [2023-10-12 17:30:05,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:30:05,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:30:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:30:05,797 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:30:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:30:05,807 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:30:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:30:06,079 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:30:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:30:06,101 INFO L201 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 12.10 05:30:06 BoogieIcfgContainer [2023-10-12 17:30:06,101 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-10-12 17:30:06,102 INFO L158 Benchmark]: Toolchain (without parser) took 1764.49ms. Allocated memory was 190.8MB in the beginning and 273.7MB in the end (delta: 82.8MB). Free memory was 141.5MB in the beginning and 178.4MB in the end (delta: -37.0MB). Peak memory consumption was 46.6MB. Max. memory is 8.0GB. [2023-10-12 17:30:06,102 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.25ms. Allocated memory is still 190.8MB. Free memory is still 142.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-10-12 17:30:06,102 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.49ms. Allocated memory is still 190.8MB. Free memory was 141.5MB in the beginning and 140.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-10-12 17:30:06,103 INFO L158 Benchmark]: Boogie Preprocessor took 15.89ms. Allocated memory is still 190.8MB. Free memory was 140.0MB in the beginning and 138.8MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-10-12 17:30:06,103 INFO L158 Benchmark]: RCFGBuilder took 237.65ms. Allocated memory is still 190.8MB. Free memory was 138.8MB in the beginning and 129.4MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-10-12 17:30:06,103 INFO L158 Benchmark]: BuchiAutomizer took 1478.20ms. Allocated memory was 190.8MB in the beginning and 273.7MB in the end (delta: 82.8MB). Free memory was 129.2MB in the beginning and 178.4MB in the end (delta: -49.2MB). Peak memory consumption was 34.0MB. Max. memory is 8.0GB. [2023-10-12 17:30:06,105 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 0.25ms. Allocated memory is still 190.8MB. Free memory is still 142.5MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.49ms. Allocated memory is still 190.8MB. Free memory was 141.5MB in the beginning and 140.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.89ms. Allocated memory is still 190.8MB. Free memory was 140.0MB in the beginning and 138.8MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 237.65ms. Allocated memory is still 190.8MB. Free memory was 138.8MB in the beginning and 129.4MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 1478.20ms. Allocated memory was 190.8MB in the beginning and 273.7MB in the end (delta: 82.8MB). Free memory was 129.2MB in the beginning and 178.4MB in the end (delta: -49.2MB). Peak memory consumption was 34.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 1 terminating modules (0 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * j1 + M1 and consists of 4 locations. The remainder module has 640 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.3s and 2 iterations. TraceHistogramMax:0. Analysis of lassos took 0.9s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 0. Minimization of det autom 0. Minimization of nondet autom 0. Automata minimization No data available. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 64 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 63 mSDsluCounter, 46 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 14 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 52 IncrementalHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 32 mSDtfsCounter, 52 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp66 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 32ms VariablesStem: 0 VariablesLoop: 3 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s InitialAbstractionConstructionTime: 0.2s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 30]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L41] 0 assume j1 == 0; [L42] 0 assume j2 == 0; [L43] 0 assume counter == 0; [L44] 0 assume M2 == M1; [L45] 0 assume 0 < M2; VAL [M1=1, M2=1, counter=0, j1=0, j2=0] [L46] FORK 0 fork 1 thread1(); VAL [M1=1, M2=1, counter=0, j1=0, j2=0] [L47] FORK 0 fork 2, 2 thread2(); VAL [M1=1, M2=1, counter=0, j1=0, j2=0] Loop: [L30] COND TRUE j2 < M2 [L32] j2 := (if 0 < counter then j2 + 1 else j2); [L33] counter := (if 0 < counter then counter - C else counter); [L30] COND TRUE j2 < M2 [L32] j2 := (if 0 < counter then j2 + 1 else j2); [L33] counter := (if 0 < counter then counter - C else counter); End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 30]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L41] 0 assume j1 == 0; [L42] 0 assume j2 == 0; [L43] 0 assume counter == 0; [L44] 0 assume M2 == M1; [L45] 0 assume 0 < M2; VAL [M1=1, M2=1, counter=0, j1=0, j2=0] [L46] FORK 0 fork 1 thread1(); VAL [M1=1, M2=1, counter=0, j1=0, j2=0] [L47] FORK 0 fork 2, 2 thread2(); VAL [M1=1, M2=1, counter=0, j1=0, j2=0] Loop: [L30] COND TRUE j2 < M2 [L32] j2 := (if 0 < counter then j2 + 1 else j2); [L33] counter := (if 0 < counter then counter - C else counter); [L30] COND TRUE j2 < M2 [L32] j2 := (if 0 < counter then j2 + 1 else j2); [L33] counter := (if 0 < counter then counter - C else counter); End of lasso representation. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.2s, 26 PlacesBefore, 16 PlacesAfterwards, 21 TransitionsBefore, 11 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 3 FixpointIterations, 7 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 11 TotalNumberOfCompositions, 48 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 48, independent: 48, independent conditional: 0, independent unconditional: 48, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 30, independent: 30, independent conditional: 0, independent unconditional: 30, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 30, independent: 30, independent conditional: 0, independent unconditional: 30, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 48, independent: 18, independent conditional: 0, independent unconditional: 18, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 30, unknown conditional: 0, unknown unconditional: 30] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 6, Positive conditional cache size: 0, Positive unconditional cache size: 6, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 RESULT: Ultimate proved your program to be incorrect! [2023-10-12 17:30:06,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2023-10-12 17:30:06,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...