/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/regression/loop-lockstep-example.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.fs.rabin-petrinet-4c29625-m [2023-10-12 17:18:04,203 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-10-12 17:18:04,298 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 17:18:04,594 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-10-12 17:18:04,595 INFO L135 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-10-12 17:18:04,595 INFO L137 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-10-12 17:18:04,596 INFO L135 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-10-12 17:18:04,596 INFO L137 SettingsManager]: * Create parallel compositions if possible=false [2023-10-12 17:18:04,597 INFO L137 SettingsManager]: * Use SBE=true [2023-10-12 17:18:04,605 INFO L135 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-10-12 17:18:04,605 INFO L137 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-10-12 17:18:04,605 INFO L137 SettingsManager]: * Use old map elimination=false [2023-10-12 17:18:04,605 INFO L137 SettingsManager]: * Use external solver (rank synthesis)=false [2023-10-12 17:18:04,606 INFO L137 SettingsManager]: * Use only trivial implications for array writes=true [2023-10-12 17:18:04,607 INFO L137 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-10-12 17:18:04,607 INFO L135 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-10-12 17:18:04,607 INFO L137 SettingsManager]: * sizeof long=4 [2023-10-12 17:18:04,607 INFO L137 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-10-12 17:18:04,607 INFO L137 SettingsManager]: * Overapproximate operations on floating types=true [2023-10-12 17:18:04,607 INFO L137 SettingsManager]: * sizeof POINTER=4 [2023-10-12 17:18:04,608 INFO L137 SettingsManager]: * Check division by zero=IGNORE [2023-10-12 17:18:04,608 INFO L137 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-10-12 17:18:04,609 INFO L137 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-10-12 17:18:04,609 INFO L137 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-10-12 17:18:04,609 INFO L137 SettingsManager]: * sizeof long double=12 [2023-10-12 17:18:04,610 INFO L137 SettingsManager]: * Check if freed pointer was valid=false [2023-10-12 17:18:04,610 INFO L137 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-10-12 17:18:04,610 INFO L137 SettingsManager]: * Use constant arrays=true [2023-10-12 17:18:04,610 INFO L137 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-10-12 17:18:04,610 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-10-12 17:18:04,611 INFO L137 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-10-12 17:18:04,611 INFO L135 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-10-12 17:18:04,611 INFO L137 SettingsManager]: * Trace refinement strategy=CAMEL [2023-10-12 17:18:04,624 INFO L135 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-10-12 17:18:04,625 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: Automaton type for concurrent programs -> BUCHI_PETRI_NET [2023-10-12 17:18:04,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-10-12 17:18:04,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-10-12 17:18:04,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-10-12 17:18:04,943 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-10-12 17:18:04,949 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-10-12 17:18:04,950 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/loop-lockstep-example.bpl [2023-10-12 17:18:04,954 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/loop-lockstep-example.bpl' [2023-10-12 17:18:04,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-10-12 17:18:04,985 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2023-10-12 17:18:04,986 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-10-12 17:18:04,986 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-10-12 17:18:04,986 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-10-12 17:18:05,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:04" (1/1) ... [2023-10-12 17:18:05,014 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:04" (1/1) ... [2023-10-12 17:18:05,018 INFO L138 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2023-10-12 17:18:05,019 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-10-12 17:18:05,033 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-10-12 17:18:05,033 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-10-12 17:18:05,033 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-10-12 17:18:05,038 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:04" (1/1) ... [2023-10-12 17:18:05,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:04" (1/1) ... [2023-10-12 17:18:05,039 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:04" (1/1) ... [2023-10-12 17:18:05,039 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:04" (1/1) ... [2023-10-12 17:18:05,040 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:04" (1/1) ... [2023-10-12 17:18:05,042 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:04" (1/1) ... [2023-10-12 17:18:05,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:04" (1/1) ... [2023-10-12 17:18:05,043 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:04" (1/1) ... [2023-10-12 17:18:05,043 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-10-12 17:18:05,044 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-10-12 17:18:05,044 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-10-12 17:18:05,044 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-10-12 17:18:05,047 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:04" (1/1) ... [2023-10-12 17:18:05,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:05,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:05,084 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 17:18:05,106 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 17:18:05,119 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2023-10-12 17:18:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-10-12 17:18:05,119 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-10-12 17:18:05,119 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2023-10-12 17:18:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-10-12 17:18:05,119 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-10-12 17:18:05,119 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-10-12 17:18:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-10-12 17:18:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-10-12 17:18:05,120 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 17:18:05,152 INFO L236 CfgBuilder]: Building ICFG [2023-10-12 17:18:05,153 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-10-12 17:18:05,203 INFO L277 CfgBuilder]: Performing block encoding [2023-10-12 17:18:05,207 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-10-12 17:18:05,207 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-10-12 17:18:05,208 INFO L201 PluginConnector]: Adding new model loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 05:18:05 BoogieIcfgContainer [2023-10-12 17:18:05,208 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-10-12 17:18:05,209 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-10-12 17:18:05,209 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-10-12 17:18:05,218 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-10-12 17:18:05,219 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-10-12 17:18:05,219 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:18:04" (1/2) ... [2023-10-12 17:18:05,220 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@76932643 and model type loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.10 05:18:05, skipping insertion in model container [2023-10-12 17:18:05,220 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-10-12 17:18:05,220 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 05:18:05" (2/2) ... [2023-10-12 17:18:05,226 INFO L332 chiAutomizerObserver]: Analyzing ICFG loop-lockstep-example.bpl [2023-10-12 17:18:05,266 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-10-12 17:18:05,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 70 flow [2023-10-12 17:18:05,300 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-10-12 17:18:05,300 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-10-12 17:18:05,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 2/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2023-10-12 17:18:05,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 70 flow [2023-10-12 17:18:05,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 23 transitions, 58 flow [2023-10-12 17:18:05,308 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-10-12 17:18:05,327 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 23 transitions, 58 flow [2023-10-12 17:18:05,329 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 23 transitions, 58 flow [2023-10-12 17:18:05,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 58 flow [2023-10-12 17:18:05,335 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-10-12 17:18:05,335 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-10-12 17:18:05,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 2/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2023-10-12 17:18:05,336 INFO L119 LiptonReduction]: Number of co-enabled transitions 138 [2023-10-12 17:18:05,603 INFO L134 LiptonReduction]: Checked pairs total: 110 [2023-10-12 17:18:05,603 INFO L136 LiptonReduction]: Total number of compositions: 10 [2023-10-12 17:18:05,615 INFO L305 stractBuchiCegarLoop]: Interprodecural is true [2023-10-12 17:18:05,615 INFO L306 stractBuchiCegarLoop]: Hoare is false [2023-10-12 17:18:05,615 INFO L307 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-10-12 17:18:05,615 INFO L308 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-10-12 17:18:05,615 INFO L309 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-10-12 17:18:05,616 INFO L310 stractBuchiCegarLoop]: Difference is false [2023-10-12 17:18:05,616 INFO L311 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-10-12 17:18:05,616 INFO L315 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiPetriNetCegarLoop ======== [2023-10-12 17:18:05,616 INFO L84 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 places, 13 transitions, 38 flow [2023-10-12 17:18:05,619 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-10-12 17:18:05,619 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-10-12 17:18:05,619 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-10-12 17:18:05,619 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty language is not empty [2023-10-12 17:18:05,624 INFO L337 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-10-12 17:18:05,625 INFO L84 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 places, 13 transitions, 38 flow [2023-10-12 17:18:05,628 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-10-12 17:18:05,628 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-10-12 17:18:05,628 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-10-12 17:18:05,628 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty language is not empty [2023-10-12 17:18:05,636 INFO L748 eck$LassoCheckResult]: Stem: 34#[$Ultimate##0]true [46] $Ultimate##0-->L43: Formula: (= v_x_11 0) InVars {} OutVars{x=v_x_11} AuxVars[] AssignedVars[x] 36#[L43]true [71] L43-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2, thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_12} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0, thread1Thread1of1ForFork0_i] 38#[L43-1, $Ultimate##0]true [54] $Ultimate##0-->L19-1: Formula: (= v_thread1Thread1of1ForFork0_i_1 0) InVars {} OutVars{thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_1} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_i] 40#[L19-1, L43-1]true [2023-10-12 17:18:05,636 INFO L750 eck$LassoCheckResult]: Loop: 40#[L19-1, L43-1]true [86] L19-1-->L19-1: Formula: (and (= v_x_94 (+ v_x_95 4)) (= v_thread1Thread1of1ForFork0_i_23 (+ v_thread1Thread1of1ForFork0_i_24 1)) (< v_thread1Thread1of1ForFork0_i_24 v_N_19)) InVars {N=v_N_19, thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_24, x=v_x_95} OutVars{N=v_N_19, thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_23, x=v_x_94} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_i, x] 40#[L19-1, L43-1]true [2023-10-12 17:18:05,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:05,640 INFO L85 PathProgramCache]: Analyzing trace with hash 76252, now seen corresponding path program 1 times [2023-10-12 17:18:05,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:18:05,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808373757] [2023-10-12 17:18:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:18:05,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:18:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:05,698 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:18:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:05,709 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:18:05,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:05,710 INFO L85 PathProgramCache]: Analyzing trace with hash 117, now seen corresponding path program 1 times [2023-10-12 17:18:05,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:18:05,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744024341] [2023-10-12 17:18:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:18:05,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:18:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:05,716 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:18:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:05,719 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:18:05,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2363898, now seen corresponding path program 1 times [2023-10-12 17:18:05,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:18:05,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436442234] [2023-10-12 17:18:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:18:05,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:18:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:05,725 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:18:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:05,730 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:18:05,822 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:18:05,824 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:18:05,824 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:18:05,824 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:18:05,824 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-10-12 17:18:05,824 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:05,824 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:18:05,824 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:18:05,824 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration1_Loop [2023-10-12 17:18:05,824 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:18:05,824 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:18:05,835 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 17:18:05,845 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 17:18:05,877 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:18:05,878 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-10-12 17:18:05,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:05,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:05,882 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 17:18:05,883 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 17:18:05,884 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:18:05,884 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:18:05,917 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 17:18:05,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:05,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:05,921 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 17:18:05,921 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 17:18:05,924 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:18:05,924 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:18:05,949 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-10-12 17:18:05,949 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {x=0} Honda state: {x=0} Generalized eigenvectors: [{x=4}, {x=0}, {x=0}] Lambdas: [1, 0, 12] Nus: [0, 1] [2023-10-12 17:18:05,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2023-10-12 17:18:05,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:05,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:05,967 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 17:18:05,968 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 17:18:05,970 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:18:05,970 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:18:06,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2023-10-12 17:18:06,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:06,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:06,031 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 17:18:06,033 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 17:18:06,066 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:18:06,066 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:18:06,182 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-10-12 17:18:06,186 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 17:18:06,186 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:18:06,186 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:18:06,186 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:18:06,186 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:18:06,186 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-10-12 17:18:06,186 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:06,186 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:18:06,187 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:18:06,187 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration1_Loop [2023-10-12 17:18:06,187 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:18:06,187 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:18:06,188 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 17:18:06,200 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 17:18:06,224 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:18:06,226 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-10-12 17:18:06,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:06,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:06,315 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 17:18:06,317 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 17:18:06,323 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 17:18:06,329 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:18:06,329 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:18:06,330 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:18:06,330 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:18:06,330 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:18:06,331 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:18:06,331 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:18:06,345 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-10-12 17:18:06,354 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 17:18:06,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:06,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:06,355 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 17:18:06,357 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 17:18:06,358 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 17:18:06,364 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:18:06,364 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:18:06,364 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:18:06,364 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:18:06,364 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:18:06,365 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:18:06,365 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:18:06,381 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-10-12 17:18:06,383 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2023-10-12 17:18:06,384 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-10-12 17:18:06,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:06,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:06,398 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 17:18:06,399 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 17:18:06,430 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-10-12 17:18:06,430 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-10-12 17:18:06,430 INFO L513 LassoAnalysis]: Proved termination. [2023-10-12 17:18:06,431 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(thread1Thread1of1ForFork0_i, N) = -1*thread1Thread1of1ForFork0_i + 1*N Supporting invariants [] [2023-10-12 17:18:06,433 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 17:18:06,436 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-10-12 17:18:06,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:18:06,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:18:06,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:18:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:18:06,473 WARN L260 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:18:06,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:18:06,473 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 17:18:06,492 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 17:18:06,493 INFO L74 BuchiComplementNCSB]: Start buchiComplementNCSB. Operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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 17:18:06,551 INFO L82 BuchiComplementNCSB]: Finished buchiComplementNCSB. Operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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 5 states and 216 transitions. [2023-10-12 17:18:06,552 INFO L79 BuchiIntersect]: Starting Intersection [2023-10-12 17:18:06,553 INFO L86 BuchiIntersect]: Exiting Intersection [2023-10-12 17:18:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2023-10-12 17:18:06,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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 17:18:06,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2023-10-12 17:18:06,561 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 107 transitions. Stem has 3 letters. Loop has 1 letters. [2023-10-12 17:18:06,561 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:06,561 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 107 transitions. Stem has 4 letters. Loop has 1 letters. [2023-10-12 17:18:06,561 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:06,561 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 107 transitions. Stem has 3 letters. Loop has 2 letters. [2023-10-12 17:18:06,561 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:06,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 144 transitions, 708 flow [2023-10-12 17:18:06,573 INFO L124 PetriNetUnfolderBase]: 55/106 cut-off events. [2023-10-12 17:18:06,573 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-10-12 17:18:06,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 106 events. 55/106 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 296 event pairs, 1 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 164. Up to 33 conditions per place. [2023-10-12 17:18:06,573 INFO L82 GeneralOperation]: Start removeDeadBuchi. Operand has 28 places, 144 transitions, 708 flow [2023-10-12 17:18:06,576 INFO L88 GeneralOperation]: Finished RemoveDeadBuchi, result has has 28 places, 144 transitions, 708 flow [2023-10-12 17:18:06,576 INFO L430 stractBuchiCegarLoop]: Abstraction has has 28 places, 144 transitions, 708 flow [2023-10-12 17:18:06,576 INFO L337 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-10-12 17:18:06,576 INFO L84 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 28 places, 144 transitions, 708 flow [2023-10-12 17:18:06,582 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-10-12 17:18:06,582 INFO L124 PetriNetUnfolderBase]: 21/39 cut-off events. [2023-10-12 17:18:06,582 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-10-12 17:18:06,582 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty language is not empty [2023-10-12 17:18:06,583 INFO L748 eck$LassoCheckResult]: Stem: 34#[$Ultimate##0]true [46] $Ultimate##0-->L43: Formula: (= v_x_11 0) InVars {} OutVars{x=v_x_11} AuxVars[] AssignedVars[x] 36#[L43]true [71] L43-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2, thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_12} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0, thread1Thread1of1ForFork0_i] 38#[L43-1, $Ultimate##0]true [74] L43-1-->$Ultimate##0: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_12, thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j, thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1] 89#[L44, $Ultimate##0, $Ultimate##0]true [63] $Ultimate##0-->L33-1: Formula: (= v_thread2Thread1of1ForFork1_j_1 0) InVars {} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_1} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j] 91#[L44, $Ultimate##0, L33-1]true [2023-10-12 17:18:06,583 INFO L750 eck$LassoCheckResult]: Loop: 91#[L44, $Ultimate##0, L33-1]true [84] L33-1-->L33-1: Formula: (and (= (+ v_x_72 4) v_x_73) (= v_thread2Thread1of1ForFork1_j_23 (+ v_thread2Thread1of1ForFork1_j_24 1)) (< v_thread2Thread1of1ForFork1_j_24 v_N_11)) InVars {thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_24, N=v_N_11, x=v_x_73} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_23, N=v_N_11, x=v_x_72} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j, x] 91#[L44, $Ultimate##0, L33-1]true [84] L33-1-->L33-1: Formula: (and (= (+ v_x_72 4) v_x_73) (= v_thread2Thread1of1ForFork1_j_23 (+ v_thread2Thread1of1ForFork1_j_24 1)) (< v_thread2Thread1of1ForFork1_j_24 v_N_11)) InVars {thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_24, N=v_N_11, x=v_x_73} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_23, N=v_N_11, x=v_x_72} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j, x] 91#[L44, $Ultimate##0, L33-1]true [2023-10-12 17:18:06,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:06,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2364495, now seen corresponding path program 1 times [2023-10-12 17:18:06,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:18:06,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041024420] [2023-10-12 17:18:06,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:18:06,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:18:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:06,587 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:18:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:06,589 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:18:06,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:06,589 INFO L85 PathProgramCache]: Analyzing trace with hash 3649, now seen corresponding path program 1 times [2023-10-12 17:18:06,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:18:06,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100136821] [2023-10-12 17:18:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:18:06,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:18:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:06,593 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:18:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:06,598 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:18:06,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:06,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2022684913, now seen corresponding path program 1 times [2023-10-12 17:18:06,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:18:06,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682353676] [2023-10-12 17:18:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:18:06,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:18:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:06,604 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:18:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:18:06,609 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:18:06,648 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:18:06,648 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:18:06,648 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:18:06,648 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:18:06,648 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-10-12 17:18:06,648 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:06,648 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:18:06,648 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:18:06,648 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration2_Loop [2023-10-12 17:18:06,648 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:18:06,648 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:18:06,649 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 17:18:06,660 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 17:18:06,679 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:18:06,679 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-10-12 17:18:06,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:06,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:06,680 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 17:18:06,682 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 17:18:06,700 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:18:06,701 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:18:06,736 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 17:18:06,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:06,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:06,746 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 17:18:06,747 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 17:18:06,750 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:18:06,750 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:18:06,939 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-10-12 17:18:06,943 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 17:18:06,943 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:18:06,943 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:18:06,943 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:18:06,944 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:18:06,944 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-10-12 17:18:06,944 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:06,944 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:18:06,944 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:18:06,944 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration2_Loop [2023-10-12 17:18:06,944 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:18:06,944 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:18:06,945 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 17:18:06,959 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 17:18:06,977 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:18:06,978 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-10-12 17:18:06,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:06,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:06,980 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 17:18:06,982 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 17:18:06,984 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 17:18:06,989 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:18:06,989 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:18:06,989 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:18:06,990 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:18:06,990 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:18:06,990 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:18:06,990 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:18:07,012 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-10-12 17:18:07,014 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-10-12 17:18:07,014 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-10-12 17:18:07,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:18:07,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:18:07,017 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 17:18:07,023 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-10-12 17:18:07,023 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-10-12 17:18:07,023 INFO L513 LassoAnalysis]: Proved termination. [2023-10-12 17:18:07,023 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(thread2Thread1of1ForFork1_j, N) = -1*thread2Thread1of1ForFork1_j + 1*N Supporting invariants [] [2023-10-12 17:18:07,024 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 17:18:07,028 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 17:18:07,029 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-10-12 17:18:07,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:18:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:18:07,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:18:07,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:18:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:18:07,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2023-10-12 17:18:07,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:18:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:18:07,062 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 17:18:07,062 INFO L74 BuchiComplementNCSB]: Start buchiComplementNCSB. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:18:07,171 INFO L82 BuchiComplementNCSB]: Finished buchiComplementNCSB. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 286 transitions. [2023-10-12 17:18:07,171 INFO L79 BuchiIntersect]: Starting Intersection [2023-10-12 17:18:07,190 INFO L86 BuchiIntersect]: Exiting Intersection [2023-10-12 17:18:07,192 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 17:18:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:18:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2023-10-12 17:18:07,194 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 142 transitions. Stem has 4 letters. Loop has 2 letters. [2023-10-12 17:18:07,194 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:07,194 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 142 transitions. Stem has 6 letters. Loop has 2 letters. [2023-10-12 17:18:07,194 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:07,194 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 142 transitions. Stem has 4 letters. Loop has 4 letters. [2023-10-12 17:18:07,194 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:18:07,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 2088 transitions, 14424 flow [2023-10-12 17:18:07,257 INFO L124 PetriNetUnfolderBase]: 142/261 cut-off events. [2023-10-12 17:18:07,257 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2023-10-12 17:18:07,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 842 conditions, 261 events. 142/261 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1002 event pairs, 2 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 631. Up to 92 conditions per place. [2023-10-12 17:18:07,259 INFO L82 GeneralOperation]: Start removeDeadBuchi. Operand has 42 places, 2088 transitions, 14424 flow [2023-10-12 17:18:07,283 INFO L88 GeneralOperation]: Finished RemoveDeadBuchi, result has has 42 places, 2088 transitions, 14424 flow [2023-10-12 17:18:07,283 INFO L430 stractBuchiCegarLoop]: Abstraction has has 42 places, 2088 transitions, 14424 flow [2023-10-12 17:18:07,283 INFO L337 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-10-12 17:18:07,283 INFO L84 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 42 places, 2088 transitions, 14424 flow [2023-10-12 17:18:07,321 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 17:18:07,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2023-10-12 17:18:07,344 INFO L124 PetriNetUnfolderBase]: 142/261 cut-off events. [2023-10-12 17:18:07,344 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2023-10-12 17:18:07,344 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty language is empty [2023-10-12 17:18:07,349 INFO L201 PluginConnector]: Adding new model loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 12.10 05:18:07 BoogieIcfgContainer [2023-10-12 17:18:07,349 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-10-12 17:18:07,349 INFO L158 Benchmark]: Toolchain (without parser) took 2364.48ms. Allocated memory was 201.3MB in the beginning and 256.9MB in the end (delta: 55.6MB). Free memory was 159.0MB in the beginning and 215.5MB in the end (delta: -56.5MB). Peak memory consumption was 69.3MB. Max. memory is 8.0GB. [2023-10-12 17:18:07,350 INFO L158 Benchmark]: Boogie PL CUP Parser took 4.03ms. Allocated memory is still 201.3MB. Free memory was 160.1MB in the beginning and 160.0MB in the end (delta: 64.7kB). There was no memory consumed. Max. memory is 8.0GB. [2023-10-12 17:18:07,350 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.62ms. Allocated memory is still 201.3MB. Free memory was 159.0MB in the beginning and 157.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-10-12 17:18:07,350 INFO L158 Benchmark]: Boogie Preprocessor took 10.71ms. Allocated memory is still 201.3MB. Free memory was 157.5MB in the beginning and 156.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-10-12 17:18:07,351 INFO L158 Benchmark]: RCFGBuilder took 164.43ms. Allocated memory is still 201.3MB. Free memory was 156.3MB in the beginning and 147.3MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-10-12 17:18:07,351 INFO L158 Benchmark]: BuchiAutomizer took 2139.70ms. Allocated memory was 201.3MB in the beginning and 256.9MB in the end (delta: 55.6MB). Free memory was 147.1MB in the beginning and 215.5MB in the end (delta: -68.4MB). Peak memory consumption was 56.7MB. Max. memory is 8.0GB. [2023-10-12 17:18:07,352 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 4.03ms. Allocated memory is still 201.3MB. Free memory was 160.1MB in the beginning and 160.0MB in the end (delta: 64.7kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.62ms. Allocated memory is still 201.3MB. Free memory was 159.0MB in the beginning and 157.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.71ms. Allocated memory is still 201.3MB. Free memory was 157.5MB in the beginning and 156.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 164.43ms. Allocated memory is still 201.3MB. Free memory was 156.3MB in the beginning and 147.3MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 2139.70ms. Allocated memory was 201.3MB in the beginning and 256.9MB in the end (delta: 55.6MB). Free memory was 147.1MB in the beginning and 215.5MB in the end (delta: -68.4MB). Peak memory consumption was 56.7MB. 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 2 terminating modules (0 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -1 * i + N and consists of 3 locations. One deterministic module has affine ranking function N + -1 * j and consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.0s and 3 iterations. TraceHistogramMax:0. Analysis of lassos took 1.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. 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 [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/1 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 170 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 168 mSDsluCounter, 168 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 68 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 166 IncrementalHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 100 mSDtfsCounter, 166 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf100 lsp68 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq154 hnf94 smp100 dnf100 smp100 tf112 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 117ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 1 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s InitialAbstractionConstructionTime: 0.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.3s, 28 PlacesBefore, 18 PlacesAfterwards, 23 TransitionsBefore, 13 TransitionsAfterwards, 138 CoEnabledTransitionPairs, 4 FixpointIterations, 1 TrivialSequentialCompositions, 9 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 10 TotalNumberOfCompositions, 110 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 110, independent: 110, independent conditional: 0, independent unconditional: 110, 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: 76, independent: 76, independent conditional: 0, independent unconditional: 76, 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: 76, independent: 68, independent conditional: 0, independent unconditional: 68, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, independent: 8, independent conditional: 0, independent unconditional: 8, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 42, independent: 42, independent conditional: 0, independent unconditional: 42, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 110, independent: 34, independent conditional: 0, independent unconditional: 34, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 76, unknown conditional: 0, unknown unconditional: 76] , Statistics on independence cache: Total cache size (in pairs): 8, Positive cache size: 8, Positive conditional cache size: 0, Positive unconditional cache size: 8, 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 correct! [2023-10-12 17:18:07,380 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...