/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf -tc ../../../trunk/examples/toolchains/BuchiAutomizerBplInline.xml -i /storage/cav23-termute-examples/4_plus_thr/m4_2.c.bpl -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.ample-buchi-601be74-m [2025-02-17 22:47:03,193 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-17 22:47:03,251 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf [2025-02-17 22:47:03,256 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-17 22:47:03,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-17 22:47:03,276 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-17 22:47:03,277 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-17 22:47:03,277 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-17 22:47:03,277 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-17 22:47:03,277 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-17 22:47:03,277 INFO L153 SettingsManager]: * Use SBE=true [2025-02-17 22:47:03,277 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2025-02-17 22:47:03,277 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2025-02-17 22:47:03,277 INFO L153 SettingsManager]: * Use old map elimination=false [2025-02-17 22:47:03,278 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2025-02-17 22:47:03,278 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2025-02-17 22:47:03,278 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2025-02-17 22:47:03,278 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-17 22:47:03,279 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2025-02-17 22:47:03,279 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-17 22:47:03,279 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-17 22:47:03,279 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-17 22:47:03,279 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-17 22:47:03,279 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2025-02-17 22:47:03,279 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2025-02-17 22:47:03,279 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2025-02-17 22:47:03,279 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-17 22:47:03,279 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-17 22:47:03,279 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-17 22:47:03,279 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2025-02-17 22:47:03,280 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-17 22:47:03,280 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-02-17 22:47:03,280 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-17 22:47:03,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-17 22:47:03,280 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-17 22:47:03,280 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2025-02-17 22:47:03,280 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR [2025-02-17 22:47:03,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-17 22:47:03,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-17 22:47:03,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-17 22:47:03,502 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2025-02-17 22:47:03,502 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2025-02-17 22:47:03,504 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/cav23-termute-examples/4_plus_thr/m4_2.c.bpl [2025-02-17 22:47:03,505 INFO L110 BoogieParser]: Parsing: '/storage/cav23-termute-examples/4_plus_thr/m4_2.c.bpl' [2025-02-17 22:47:03,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-17 22:47:03,517 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2025-02-17 22:47:03,517 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-17 22:47:03,517 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-17 22:47:03,517 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-17 22:47:03,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "m4_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.02 10:47:03" (1/1) ... [2025-02-17 22:47:03,529 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "m4_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.02 10:47:03" (1/1) ... [2025-02-17 22:47:03,533 INFO L138 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2025-02-17 22:47:03,534 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-17 22:47:03,534 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-17 22:47:03,534 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-17 22:47:03,534 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-17 22:47:03,539 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "m4_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.02 10:47:03" (1/1) ... [2025-02-17 22:47:03,539 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "m4_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.02 10:47:03" (1/1) ... [2025-02-17 22:47:03,539 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "m4_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.02 10:47:03" (1/1) ... [2025-02-17 22:47:03,539 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "m4_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.02 10:47:03" (1/1) ... [2025-02-17 22:47:03,541 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "m4_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.02 10:47:03" (1/1) ... [2025-02-17 22:47:03,541 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "m4_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.02 10:47:03" (1/1) ... [2025-02-17 22:47:03,543 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "m4_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.02 10:47:03" (1/1) ... [2025-02-17 22:47:03,544 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "m4_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.02 10:47:03" (1/1) ... [2025-02-17 22:47:03,544 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "m4_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.02 10:47:03" (1/1) ... [2025-02-17 22:47:03,545 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-17 22:47:03,545 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-02-17 22:47:03,545 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-02-17 22:47:03,545 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-02-17 22:47:03,546 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "m4_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.02 10:47:03" (1/1) ... [2025-02-17 22:47:03,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:03,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:03,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:03,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2025-02-17 22:47:03,591 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2025-02-17 22:47:03,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-17 22:47:03,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-17 22:47:03,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2025-02-17 22:47:03,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-17 22:47:03,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-17 22:47:03,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2025-02-17 22:47:03,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-17 22:47:03,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-17 22:47:03,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2025-02-17 22:47:03,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-17 22:47:03,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-17 22:47:03,594 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2025-02-17 22:47:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-02-17 22:47:03,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-02-17 22:47:03,595 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-17 22:47:03,639 INFO L234 CfgBuilder]: Building ICFG [2025-02-17 22:47:03,641 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-17 22:47:03,728 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-17 22:47:03,728 INFO L283 CfgBuilder]: Performing block encoding [2025-02-17 22:47:03,739 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-17 22:47:03,739 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-17 22:47:03,740 INFO L201 PluginConnector]: Adding new model m4_2.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 10:47:03 BoogieIcfgContainer [2025-02-17 22:47:03,740 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-02-17 22:47:03,740 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2025-02-17 22:47:03,740 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2025-02-17 22:47:03,745 INFO L274 PluginConnector]: BuchiAutomizer initialized [2025-02-17 22:47:03,746 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-02-17 22:47:03,746 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "m4_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.02 10:47:03" (1/2) ... [2025-02-17 22:47:03,747 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4669e3ab and model type m4_2.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 17.02 10:47:03, skipping insertion in model container [2025-02-17 22:47:03,747 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-02-17 22:47:03,747 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "m4_2.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 10:47:03" (2/2) ... [2025-02-17 22:47:03,748 INFO L363 chiAutomizerObserver]: Analyzing ICFG m4_2.c.bpl [2025-02-17 22:47:03,805 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-17 22:47:03,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 38 transitions, 104 flow [2025-02-17 22:47:03,859 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2025-02-17 22:47:03,864 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-17 22:47:03,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 30 events. 4/30 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 63 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2025-02-17 22:47:03,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 38 transitions, 104 flow [2025-02-17 22:47:03,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 30 transitions, 84 flow [2025-02-17 22:47:03,885 INFO L306 stractBuchiCegarLoop]: Interprodecural is true [2025-02-17 22:47:03,885 INFO L307 stractBuchiCegarLoop]: Hoare is None [2025-02-17 22:47:03,887 INFO L308 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2025-02-17 22:47:03,887 INFO L309 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2025-02-17 22:47:03,890 INFO L310 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2025-02-17 22:47:03,890 INFO L311 stractBuchiCegarLoop]: Difference is false [2025-02-17 22:47:03,890 INFO L312 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2025-02-17 22:47:03,890 INFO L316 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2025-02-17 22:47:03,892 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2025-02-17 22:47:04,070 INFO L131 ngComponentsAnalysis]: Automaton has 265 accepting balls. 776 [2025-02-17 22:47:04,071 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-02-17 22:47:04,071 INFO L119 BuchiIsEmpty]: Starting construction of run [2025-02-17 22:47:04,073 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-02-17 22:47:04,073 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2025-02-17 22:47:04,074 INFO L338 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2025-02-17 22:47:04,074 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 938 states, but on-demand construction may add more states [2025-02-17 22:47:04,093 INFO L131 ngComponentsAnalysis]: Automaton has 265 accepting balls. 776 [2025-02-17 22:47:04,096 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-02-17 22:47:04,096 INFO L119 BuchiIsEmpty]: Starting construction of run [2025-02-17 22:47:04,097 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-02-17 22:47:04,097 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2025-02-17 22:47:04,101 INFO L752 eck$LassoCheckResult]: Stem: "[69] $Ultimate##0-->L15: Formula: (and (= v_f1_4 0) (= v_f2_3 0)) InVars {f2=v_f2_3, f1=v_f1_4} OutVars{f2=v_f2_3, f1=v_f1_4} AuxVars[] AssignedVars[]" "[96] L15-->L28: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" [2025-02-17 22:47:04,101 INFO L754 eck$LassoCheckResult]: Loop: "[75] L28-->L30: Formula: (< v_x1_1 v_z1_1) InVars {x1=v_x1_1, z1=v_z1_1} OutVars{x1=v_x1_1, z1=v_z1_1} AuxVars[] AssignedVars[]" "[77] L30-->L28: Formula: (= v_x1_2 (+ v_x1_3 1)) InVars {x1=v_x1_3} OutVars{x1=v_x1_2} AuxVars[] AssignedVars[x1]" [2025-02-17 22:47:04,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-17 22:47:04,106 INFO L85 PathProgramCache]: Analyzing trace with hash 3196, now seen corresponding path program 1 times [2025-02-17 22:47:04,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-17 22:47:04,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163613457] [2025-02-17 22:47:04,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-17 22:47:04,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-17 22:47:04,160 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:04,165 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:04,167 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:04,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:04,167 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-17 22:47:04,172 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:04,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:04,173 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:04,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:04,184 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-17 22:47:04,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-17 22:47:04,189 INFO L85 PathProgramCache]: Analyzing trace with hash 3363, now seen corresponding path program 1 times [2025-02-17 22:47:04,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-17 22:47:04,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316558730] [2025-02-17 22:47:04,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-17 22:47:04,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-17 22:47:04,195 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:04,201 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:04,201 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:04,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:04,201 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-17 22:47:04,202 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:04,203 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:04,203 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:04,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:04,205 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-17 22:47:04,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-17 22:47:04,207 INFO L85 PathProgramCache]: Analyzing trace with hash 3073758, now seen corresponding path program 1 times [2025-02-17 22:47:04,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-17 22:47:04,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4863335] [2025-02-17 22:47:04,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-17 22:47:04,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-17 22:47:04,212 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-17 22:47:04,214 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-17 22:47:04,214 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:04,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:04,214 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-17 22:47:04,215 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-17 22:47:04,217 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-17 22:47:04,217 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:04,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:04,219 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-17 22:47:04,261 INFO L204 LassoAnalysis]: Preferences: [2025-02-17 22:47:04,261 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-02-17 22:47:04,261 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-02-17 22:47:04,261 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-02-17 22:47:04,261 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-02-17 22:47:04,262 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:04,262 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-02-17 22:47:04,262 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-02-17 22:47:04,262 INFO L132 ssoRankerPreferences]: Filename of dumped script: m4_2.c.bpl_petrified1_Iteration1_Loop [2025-02-17 22:47:04,262 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-02-17 22:47:04,262 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2025-02-17 22:47:04,273 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-02-17 22:47:04,328 INFO L259 LassoAnalysis]: Preprocessing complete. [2025-02-17 22:47:04,329 INFO L365 LassoAnalysis]: Checking for nontermination... [2025-02-17 22:47:04,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:04,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:04,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:04,337 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-02-17 22:47:04,337 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-02-17 22:47:04,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2025-02-17 22:47:04,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2025-02-17 22:47:04,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:04,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:04,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:04,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2025-02-17 22:47:04,363 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-02-17 22:47:04,364 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-02-17 22:47:04,440 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-02-17 22:47:04,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2025-02-17 22:47:04,446 INFO L204 LassoAnalysis]: Preferences: [2025-02-17 22:47:04,446 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-02-17 22:47:04,446 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-02-17 22:47:04,446 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-02-17 22:47:04,446 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-02-17 22:47:04,446 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:04,446 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-02-17 22:47:04,446 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-02-17 22:47:04,446 INFO L132 ssoRankerPreferences]: Filename of dumped script: m4_2.c.bpl_petrified1_Iteration1_Loop [2025-02-17 22:47:04,446 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-02-17 22:47:04,446 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2025-02-17 22:47:04,447 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-02-17 22:47:04,472 INFO L259 LassoAnalysis]: Preprocessing complete. [2025-02-17 22:47:04,475 INFO L451 LassoAnalysis]: Using template 'affine'. [2025-02-17 22:47:04,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:04,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:04,478 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:04,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2025-02-17 22:47:04,483 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 [2025-02-17 22:47:04,496 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-02-17 22:47:04,496 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-02-17 22:47:04,497 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-02-17 22:47:04,497 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-02-17 22:47:04,497 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-02-17 22:47:04,505 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-02-17 22:47:04,505 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-02-17 22:47:04,509 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-02-17 22:47:04,516 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2025-02-17 22:47:04,516 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2025-02-17 22:47:04,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:04,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:04,520 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:04,522 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-02-17 22:47:04,523 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-02-17 22:47:04,523 INFO L474 LassoAnalysis]: Proved termination. [2025-02-17 22:47:04,523 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(z1, x1) = 1*z1 - 1*x1 Supporting invariants [] [2025-02-17 22:47:04,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2025-02-17 22:47:04,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2025-02-17 22:47:04,532 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-02-17 22:47:04,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-17 22:47:04,568 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:04,569 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:04,570 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:04,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-17 22:47:04,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-17 22:47:04,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-17 22:47:04,585 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:04,586 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:04,586 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:04,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-17 22:47:04,586 WARN L254 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-17 22:47:04,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-17 22:47:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-17 22:47:04,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2025-02-17 22:47:04,662 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 [2025-02-17 22:47:04,665 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand currently 938 states, but on-demand construction may add more states Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-17 22:47:04,847 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand currently 938 states, but on-demand construction may add more states. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 3278 states and 13498 transitions. Complement of second has 7 states. [2025-02-17 22:47:04,849 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 [2025-02-17 22:47:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-17 22:47:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2025-02-17 22:47:04,858 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 65 transitions. Stem has 2 letters. Loop has 2 letters. [2025-02-17 22:47:04,858 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2025-02-17 22:47:04,859 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 65 transitions. Stem has 4 letters. Loop has 2 letters. [2025-02-17 22:47:04,859 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2025-02-17 22:47:04,859 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 65 transitions. Stem has 2 letters. Loop has 4 letters. [2025-02-17 22:47:04,859 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2025-02-17 22:47:04,859 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 3278 states and 13498 transitions. [2025-02-17 22:47:04,913 INFO L131 ngComponentsAnalysis]: Automaton has 455 accepting balls. 1190 [2025-02-17 22:47:04,960 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 3278 states to 2441 states and 10158 transitions. [2025-02-17 22:47:04,961 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1548 [2025-02-17 22:47:04,971 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 2010 [2025-02-17 22:47:04,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2441 states and 10158 transitions. [2025-02-17 22:47:04,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-02-17 22:47:04,973 INFO L218 hiAutomatonCegarLoop]: Abstraction has 2441 states and 10158 transitions. [2025-02-17 22:47:04,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states and 10158 transitions. [2025-02-17 22:47:05,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 1536. [2025-02-17 22:47:05,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1536 states have (on average 4.323567708333333) internal successors, (6641), 1535 states have internal predecessors, (6641), 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) [2025-02-17 22:47:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 6641 transitions. [2025-02-17 22:47:05,079 INFO L240 hiAutomatonCegarLoop]: Abstraction has 1536 states and 6641 transitions. [2025-02-17 22:47:05,079 INFO L432 stractBuchiCegarLoop]: Abstraction has 1536 states and 6641 transitions. [2025-02-17 22:47:05,079 INFO L338 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2025-02-17 22:47:05,079 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1536 states and 6641 transitions. [2025-02-17 22:47:05,088 INFO L131 ngComponentsAnalysis]: Automaton has 323 accepting balls. 892 [2025-02-17 22:47:05,089 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-02-17 22:47:05,089 INFO L119 BuchiIsEmpty]: Starting construction of run [2025-02-17 22:47:05,089 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2025-02-17 22:47:05,089 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2025-02-17 22:47:05,089 INFO L752 eck$LassoCheckResult]: Stem: "[69] $Ultimate##0-->L15: Formula: (and (= v_f1_4 0) (= v_f2_3 0)) InVars {f2=v_f2_3, f1=v_f1_4} OutVars{f2=v_f2_3, f1=v_f1_4} AuxVars[] AssignedVars[]" "[96] L15-->L28: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[99] L15-1-->$Ultimate##0: 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]" "[102] L16-->L48: Formula: (and (= 3 v_thread3Thread1of1ForFork2_thidvar0_2) (= 3 v_thread3Thread1of1ForFork2_thidvar1_2) (= 3 v_thread3Thread1of1ForFork2_thidvar2_2)) InVars {} OutVars{thread3Thread1of1ForFork2_thidvar2=v_thread3Thread1of1ForFork2_thidvar2_2, thread3Thread1of1ForFork2_thidvar1=v_thread3Thread1of1ForFork2_thidvar1_2, thread3Thread1of1ForFork2_thidvar0=v_thread3Thread1of1ForFork2_thidvar0_2} AuxVars[] AssignedVars[thread3Thread1of1ForFork2_thidvar2, thread3Thread1of1ForFork2_thidvar1, thread3Thread1of1ForFork2_thidvar0]" [2025-02-17 22:47:05,090 INFO L754 eck$LassoCheckResult]: Loop: "[85] L48-->L50: Formula: (< v_x2_1 v_z2_1) InVars {z2=v_z2_1, x2=v_x2_1} OutVars{z2=v_z2_1, x2=v_x2_1} AuxVars[] AssignedVars[]" "[87] L50-->L48: Formula: (= v_x2_2 (+ v_x2_3 1)) InVars {x2=v_x2_3} OutVars{x2=v_x2_2} AuxVars[] AssignedVars[x2]" [2025-02-17 22:47:05,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-17 22:47:05,090 INFO L85 PathProgramCache]: Analyzing trace with hash 3074527, now seen corresponding path program 1 times [2025-02-17 22:47:05,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-17 22:47:05,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938117796] [2025-02-17 22:47:05,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-17 22:47:05,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-17 22:47:05,094 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-17 22:47:05,096 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-17 22:47:05,096 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:05,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:05,096 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-17 22:47:05,097 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-17 22:47:05,098 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-17 22:47:05,098 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:05,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:05,101 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-17 22:47:05,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-17 22:47:05,102 INFO L85 PathProgramCache]: Analyzing trace with hash 3683, now seen corresponding path program 1 times [2025-02-17 22:47:05,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-17 22:47:05,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914281709] [2025-02-17 22:47:05,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-17 22:47:05,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-17 22:47:05,105 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:05,107 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:05,107 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:05,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:05,108 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-17 22:47:05,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:05,109 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:05,109 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:05,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:05,110 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-17 22:47:05,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-17 22:47:05,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1340344127, now seen corresponding path program 1 times [2025-02-17 22:47:05,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-17 22:47:05,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907695305] [2025-02-17 22:47:05,111 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-17 22:47:05,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-17 22:47:05,112 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-17 22:47:05,114 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-17 22:47:05,114 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:05,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:05,114 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-17 22:47:05,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-17 22:47:05,118 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-17 22:47:05,118 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:05,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:05,119 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-17 22:47:05,135 INFO L204 LassoAnalysis]: Preferences: [2025-02-17 22:47:05,135 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-02-17 22:47:05,135 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-02-17 22:47:05,135 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-02-17 22:47:05,135 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-02-17 22:47:05,135 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:05,135 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-02-17 22:47:05,135 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-02-17 22:47:05,135 INFO L132 ssoRankerPreferences]: Filename of dumped script: m4_2.c.bpl_petrified1_Iteration2_Loop [2025-02-17 22:47:05,135 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-02-17 22:47:05,135 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2025-02-17 22:47:05,136 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-02-17 22:47:05,158 INFO L259 LassoAnalysis]: Preprocessing complete. [2025-02-17 22:47:05,159 INFO L365 LassoAnalysis]: Checking for nontermination... [2025-02-17 22:47:05,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:05,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:05,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:05,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2025-02-17 22:47:05,169 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-02-17 22:47:05,169 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-02-17 22:47:05,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2025-02-17 22:47:05,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:05,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:05,188 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:05,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2025-02-17 22:47:05,190 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-02-17 22:47:05,190 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-02-17 22:47:05,255 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-02-17 22:47:05,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2025-02-17 22:47:05,259 INFO L204 LassoAnalysis]: Preferences: [2025-02-17 22:47:05,260 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-02-17 22:47:05,260 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-02-17 22:47:05,260 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-02-17 22:47:05,260 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-02-17 22:47:05,260 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:05,260 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-02-17 22:47:05,260 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-02-17 22:47:05,260 INFO L132 ssoRankerPreferences]: Filename of dumped script: m4_2.c.bpl_petrified1_Iteration2_Loop [2025-02-17 22:47:05,260 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-02-17 22:47:05,260 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2025-02-17 22:47:05,261 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-02-17 22:47:05,279 INFO L259 LassoAnalysis]: Preprocessing complete. [2025-02-17 22:47:05,279 INFO L451 LassoAnalysis]: Using template 'affine'. [2025-02-17 22:47:05,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:05,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:05,281 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:05,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2025-02-17 22:47:05,284 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 [2025-02-17 22:47:05,293 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-02-17 22:47:05,294 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-02-17 22:47:05,294 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-02-17 22:47:05,294 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-02-17 22:47:05,294 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-02-17 22:47:05,295 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-02-17 22:47:05,295 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-02-17 22:47:05,297 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-02-17 22:47:05,305 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2025-02-17 22:47:05,305 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2025-02-17 22:47:05,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:05,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:05,308 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:05,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2025-02-17 22:47:05,310 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-02-17 22:47:05,310 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-02-17 22:47:05,310 INFO L474 LassoAnalysis]: Proved termination. [2025-02-17 22:47:05,310 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(z2, x2) = 1*z2 - 1*x2 Supporting invariants [] [2025-02-17 22:47:05,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2025-02-17 22:47:05,318 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-02-17 22:47:05,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-17 22:47:05,335 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-17 22:47:05,338 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-17 22:47:05,338 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:05,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-17 22:47:05,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-17 22:47:05,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-17 22:47:05,347 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:05,348 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:05,348 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:05,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-17 22:47:05,348 WARN L254 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-17 22:47:05,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-17 22:47:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-17 22:47:05,361 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 [2025-02-17 22:47:05,362 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1536 states and 6641 transitions. cyclomatic complexity: 5522 Second 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) [2025-02-17 22:47:05,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2025-02-17 22:47:05,504 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1536 states and 6641 transitions. cyclomatic complexity: 5522. Second 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 5464 states and 24533 transitions. Complement of second has 7 states. [2025-02-17 22:47:05,505 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 [2025-02-17 22:47:05,506 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) [2025-02-17 22:47:05,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2025-02-17 22:47:05,506 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 73 transitions. Stem has 4 letters. Loop has 2 letters. [2025-02-17 22:47:05,506 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2025-02-17 22:47:05,506 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 73 transitions. Stem has 6 letters. Loop has 2 letters. [2025-02-17 22:47:05,506 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2025-02-17 22:47:05,506 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 73 transitions. Stem has 4 letters. Loop has 4 letters. [2025-02-17 22:47:05,506 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2025-02-17 22:47:05,506 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 5464 states and 24533 transitions. [2025-02-17 22:47:05,565 INFO L131 ngComponentsAnalysis]: Automaton has 434 accepting balls. 1128 [2025-02-17 22:47:05,616 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 5464 states to 4103 states and 18515 transitions. [2025-02-17 22:47:05,617 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1977 [2025-02-17 22:47:05,627 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 2621 [2025-02-17 22:47:05,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4103 states and 18515 transitions. [2025-02-17 22:47:05,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-02-17 22:47:05,628 INFO L218 hiAutomatonCegarLoop]: Abstraction has 4103 states and 18515 transitions. [2025-02-17 22:47:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states and 18515 transitions. [2025-02-17 22:47:05,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 2923. [2025-02-17 22:47:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2923 states have (on average 4.707492302429011) internal successors, (13760), 2922 states have internal predecessors, (13760), 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) [2025-02-17 22:47:05,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 13760 transitions. [2025-02-17 22:47:05,792 INFO L240 hiAutomatonCegarLoop]: Abstraction has 2923 states and 13760 transitions. [2025-02-17 22:47:05,792 INFO L432 stractBuchiCegarLoop]: Abstraction has 2923 states and 13760 transitions. [2025-02-17 22:47:05,792 INFO L338 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2025-02-17 22:47:05,792 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 2923 states and 13760 transitions. [2025-02-17 22:47:05,814 INFO L131 ngComponentsAnalysis]: Automaton has 350 accepting balls. 936 [2025-02-17 22:47:05,815 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-02-17 22:47:05,815 INFO L119 BuchiIsEmpty]: Starting construction of run [2025-02-17 22:47:05,815 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2025-02-17 22:47:05,815 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2025-02-17 22:47:05,816 INFO L752 eck$LassoCheckResult]: Stem: "[69] $Ultimate##0-->L15: Formula: (and (= v_f1_4 0) (= v_f2_3 0)) InVars {f2=v_f2_3, f1=v_f1_4} OutVars{f2=v_f2_3, f1=v_f1_4} AuxVars[] AssignedVars[]" "[96] L15-->L28: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[99] L15-1-->$Ultimate##0: 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]" "[74] L28-->L32: Formula: (<= v_z1_2 v_x1_4) InVars {x1=v_x1_4, z1=v_z1_2} OutVars{x1=v_x1_4, z1=v_z1_2} AuxVars[] AssignedVars[]" "[79] $Ultimate##0-->L39-1: Formula: (< 0 v_f1_3) InVars {f1=v_f1_3} OutVars{f1=v_f1_3} AuxVars[] AssignedVars[]" [2025-02-17 22:47:05,816 INFO L754 eck$LassoCheckResult]: Loop: "[81] L39-1-->L41: Formula: (< v_y1_1 v_x1_5) InVars {y1=v_y1_1, x1=v_x1_5} OutVars{y1=v_y1_1, x1=v_x1_5} AuxVars[] AssignedVars[]" "[83] L41-->L39-1: Formula: (= v_x1_7 (+ v_x1_6 1)) InVars {x1=v_x1_7} OutVars{x1=v_x1_6} AuxVars[] AssignedVars[x1]" [2025-02-17 22:47:05,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-17 22:47:05,816 INFO L85 PathProgramCache]: Analyzing trace with hash 95309548, now seen corresponding path program 1 times [2025-02-17 22:47:05,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-17 22:47:05,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682520638] [2025-02-17 22:47:05,816 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-17 22:47:05,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-17 22:47:05,822 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-17 22:47:05,826 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-17 22:47:05,826 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:05,826 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-17 22:47:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-17 22:47:05,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-17 22:47:05,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682520638] [2025-02-17 22:47:05,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682520638] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-17 22:47:05,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-17 22:47:05,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-17 22:47:05,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797310961] [2025-02-17 22:47:05,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-17 22:47:05,881 INFO L757 eck$LassoCheckResult]: stem already infeasible [2025-02-17 22:47:05,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-17 22:47:05,881 INFO L85 PathProgramCache]: Analyzing trace with hash 3555, now seen corresponding path program 1 times [2025-02-17 22:47:05,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-17 22:47:05,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653866024] [2025-02-17 22:47:05,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-17 22:47:05,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-17 22:47:05,883 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:05,885 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:05,885 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:05,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:05,885 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-17 22:47:05,885 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:05,886 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:05,886 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:05,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:05,887 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-17 22:47:05,901 INFO L204 LassoAnalysis]: Preferences: [2025-02-17 22:47:05,901 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-02-17 22:47:05,901 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-02-17 22:47:05,901 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-02-17 22:47:05,901 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-02-17 22:47:05,901 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:05,901 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-02-17 22:47:05,901 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-02-17 22:47:05,901 INFO L132 ssoRankerPreferences]: Filename of dumped script: m4_2.c.bpl_petrified1_Iteration3_Loop [2025-02-17 22:47:05,901 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-02-17 22:47:05,901 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2025-02-17 22:47:05,902 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-02-17 22:47:05,919 INFO L259 LassoAnalysis]: Preprocessing complete. [2025-02-17 22:47:05,919 INFO L365 LassoAnalysis]: Checking for nontermination... [2025-02-17 22:47:05,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:05,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:05,921 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:05,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2025-02-17 22:47:05,924 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-02-17 22:47:05,924 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-02-17 22:47:05,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2025-02-17 22:47:05,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:05,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:05,951 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:05,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2025-02-17 22:47:05,953 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-02-17 22:47:05,953 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-02-17 22:47:06,031 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-02-17 22:47:06,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2025-02-17 22:47:06,036 INFO L204 LassoAnalysis]: Preferences: [2025-02-17 22:47:06,036 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-02-17 22:47:06,036 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-02-17 22:47:06,036 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-02-17 22:47:06,036 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-02-17 22:47:06,036 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:06,036 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-02-17 22:47:06,036 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-02-17 22:47:06,036 INFO L132 ssoRankerPreferences]: Filename of dumped script: m4_2.c.bpl_petrified1_Iteration3_Loop [2025-02-17 22:47:06,036 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-02-17 22:47:06,036 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2025-02-17 22:47:06,037 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-02-17 22:47:06,056 INFO L259 LassoAnalysis]: Preprocessing complete. [2025-02-17 22:47:06,057 INFO L451 LassoAnalysis]: Using template 'affine'. [2025-02-17 22:47:06,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:06,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:06,059 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:06,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2025-02-17 22:47:06,062 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 [2025-02-17 22:47:06,073 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-02-17 22:47:06,073 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-02-17 22:47:06,073 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-02-17 22:47:06,073 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-02-17 22:47:06,073 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-02-17 22:47:06,074 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-02-17 22:47:06,074 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-02-17 22:47:06,076 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-02-17 22:47:06,079 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-02-17 22:47:06,079 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-02-17 22:47:06,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:06,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:06,081 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:06,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2025-02-17 22:47:06,084 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-02-17 22:47:06,084 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-02-17 22:47:06,084 INFO L474 LassoAnalysis]: Proved termination. [2025-02-17 22:47:06,084 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(y1, x1) = -1*y1 + 1*x1 Supporting invariants [] [2025-02-17 22:47:06,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2025-02-17 22:47:06,091 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-02-17 22:47:06,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-17 22:47:06,105 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-17 22:47:06,107 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-17 22:47:06,107 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:06,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-17 22:47:06,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-17 22:47:06,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-17 22:47:06,118 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:06,119 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:06,119 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:06,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-17 22:47:06,119 WARN L254 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-17 22:47:06,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-17 22:47:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-17 22:47:06,132 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 [2025-02-17 22:47:06,132 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 2923 states and 13760 transitions. cyclomatic complexity: 11498 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-17 22:47:06,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2025-02-17 22:47:06,314 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 2923 states and 13760 transitions. cyclomatic complexity: 11498. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 9957 states and 47092 transitions. Complement of second has 7 states. [2025-02-17 22:47:06,315 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 [2025-02-17 22:47:06,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-17 22:47:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2025-02-17 22:47:06,316 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 81 transitions. Stem has 5 letters. Loop has 2 letters. [2025-02-17 22:47:06,316 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2025-02-17 22:47:06,316 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 81 transitions. Stem has 7 letters. Loop has 2 letters. [2025-02-17 22:47:06,316 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2025-02-17 22:47:06,316 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 81 transitions. Stem has 5 letters. Loop has 4 letters. [2025-02-17 22:47:06,316 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2025-02-17 22:47:06,316 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9957 states and 47092 transitions. [2025-02-17 22:47:06,491 INFO L131 ngComponentsAnalysis]: Automaton has 549 accepting balls. 1400 [2025-02-17 22:47:06,609 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9957 states to 7592 states and 35648 transitions. [2025-02-17 22:47:06,609 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3023 [2025-02-17 22:47:06,623 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3796 [2025-02-17 22:47:06,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7592 states and 35648 transitions. [2025-02-17 22:47:06,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-02-17 22:47:06,624 INFO L218 hiAutomatonCegarLoop]: Abstraction has 7592 states and 35648 transitions. [2025-02-17 22:47:06,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7592 states and 35648 transitions. [2025-02-17 22:47:06,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7592 to 4940. [2025-02-17 22:47:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4940 states, 4940 states have (on average 4.979959514170041) internal successors, (24601), 4939 states have internal predecessors, (24601), 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) [2025-02-17 22:47:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4940 states to 4940 states and 24601 transitions. [2025-02-17 22:47:06,913 INFO L240 hiAutomatonCegarLoop]: Abstraction has 4940 states and 24601 transitions. [2025-02-17 22:47:06,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-17 22:47:06,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-17 22:47:06,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-17 22:47:06,917 INFO L87 Difference]: Start difference. First operand 4940 states and 24601 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-17 22:47:06,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-17 22:47:06,958 INFO L93 Difference]: Finished difference Result 1542 states and 6767 transitions. [2025-02-17 22:47:06,958 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1542 states and 6767 transitions. [2025-02-17 22:47:06,970 INFO L131 ngComponentsAnalysis]: Automaton has 115 accepting balls. 268 [2025-02-17 22:47:06,982 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1542 states to 1454 states and 6443 transitions. [2025-02-17 22:47:06,982 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 712 [2025-02-17 22:47:06,984 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 712 [2025-02-17 22:47:06,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1454 states and 6443 transitions. [2025-02-17 22:47:06,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-02-17 22:47:06,985 INFO L218 hiAutomatonCegarLoop]: Abstraction has 1454 states and 6443 transitions. [2025-02-17 22:47:06,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states and 6443 transitions. [2025-02-17 22:47:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1454. [2025-02-17 22:47:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1454 states have (on average 4.431224209078405) internal successors, (6443), 1453 states have internal predecessors, (6443), 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) [2025-02-17 22:47:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 6443 transitions. [2025-02-17 22:47:07,012 INFO L240 hiAutomatonCegarLoop]: Abstraction has 1454 states and 6443 transitions. [2025-02-17 22:47:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-17 22:47:07,014 INFO L432 stractBuchiCegarLoop]: Abstraction has 1454 states and 6443 transitions. [2025-02-17 22:47:07,014 INFO L338 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2025-02-17 22:47:07,014 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1454 states and 6443 transitions. [2025-02-17 22:47:07,021 INFO L131 ngComponentsAnalysis]: Automaton has 115 accepting balls. 268 [2025-02-17 22:47:07,021 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-02-17 22:47:07,021 INFO L119 BuchiIsEmpty]: Starting construction of run [2025-02-17 22:47:07,022 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-17 22:47:07,022 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2025-02-17 22:47:07,023 INFO L752 eck$LassoCheckResult]: Stem: "[69] $Ultimate##0-->L15: Formula: (and (= v_f1_4 0) (= v_f2_3 0)) InVars {f2=v_f2_3, f1=v_f1_4} OutVars{f2=v_f2_3, f1=v_f1_4} AuxVars[] AssignedVars[]" "[96] L15-->L28: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[99] L15-1-->$Ultimate##0: 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]" "[102] L16-->L48: Formula: (and (= 3 v_thread3Thread1of1ForFork2_thidvar0_2) (= 3 v_thread3Thread1of1ForFork2_thidvar1_2) (= 3 v_thread3Thread1of1ForFork2_thidvar2_2)) InVars {} OutVars{thread3Thread1of1ForFork2_thidvar2=v_thread3Thread1of1ForFork2_thidvar2_2, thread3Thread1of1ForFork2_thidvar1=v_thread3Thread1of1ForFork2_thidvar1_2, thread3Thread1of1ForFork2_thidvar0=v_thread3Thread1of1ForFork2_thidvar0_2} AuxVars[] AssignedVars[thread3Thread1of1ForFork2_thidvar2, thread3Thread1of1ForFork2_thidvar1, thread3Thread1of1ForFork2_thidvar0]" "[84] L48-->L52: Formula: (<= v_z2_2 v_x2_4) InVars {z2=v_z2_2, x2=v_x2_4} OutVars{z2=v_z2_2, x2=v_x2_4} AuxVars[] AssignedVars[]" "[105] L17-->$Ultimate##0: Formula: (and (= v_thread4Thread1of1ForFork3_thidvar2_2 4) (= v_thread4Thread1of1ForFork3_thidvar3_2 4) (= v_thread4Thread1of1ForFork3_thidvar0_2 4) (= v_thread4Thread1of1ForFork3_thidvar1_2 4)) InVars {} OutVars{thread4Thread1of1ForFork3_thidvar1=v_thread4Thread1of1ForFork3_thidvar1_2, thread4Thread1of1ForFork3_thidvar0=v_thread4Thread1of1ForFork3_thidvar0_2, thread4Thread1of1ForFork3_thidvar3=v_thread4Thread1of1ForFork3_thidvar3_2, thread4Thread1of1ForFork3_thidvar2=v_thread4Thread1of1ForFork3_thidvar2_2} AuxVars[] AssignedVars[thread4Thread1of1ForFork3_thidvar1, thread4Thread1of1ForFork3_thidvar0, thread4Thread1of1ForFork3_thidvar3, thread4Thread1of1ForFork3_thidvar2]" "[89] $Ultimate##0-->L59-1: Formula: (< 0 v_f2_4) InVars {f2=v_f2_4} OutVars{f2=v_f2_4} AuxVars[] AssignedVars[]" [2025-02-17 22:47:07,023 INFO L754 eck$LassoCheckResult]: Loop: "[91] L59-1-->L61: Formula: (< v_y2_1 v_x2_5) InVars {y2=v_y2_1, x2=v_x2_5} OutVars{y2=v_y2_1, x2=v_x2_5} AuxVars[] AssignedVars[]" "[93] L61-->L59-1: Formula: (= v_x2_7 (+ v_x2_6 1)) InVars {x2=v_x2_7} OutVars{x2=v_x2_6} AuxVars[] AssignedVars[x2]" [2025-02-17 22:47:07,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-17 22:47:07,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1399004709, now seen corresponding path program 1 times [2025-02-17 22:47:07,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-17 22:47:07,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969722846] [2025-02-17 22:47:07,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-17 22:47:07,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-17 22:47:07,029 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-17 22:47:07,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-17 22:47:07,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:07,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-17 22:47:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-17 22:47:07,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-17 22:47:07,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969722846] [2025-02-17 22:47:07,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969722846] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-17 22:47:07,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-17 22:47:07,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-17 22:47:07,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501292464] [2025-02-17 22:47:07,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-17 22:47:07,063 INFO L757 eck$LassoCheckResult]: stem already infeasible [2025-02-17 22:47:07,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-17 22:47:07,063 INFO L85 PathProgramCache]: Analyzing trace with hash 3875, now seen corresponding path program 1 times [2025-02-17 22:47:07,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-17 22:47:07,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805708068] [2025-02-17 22:47:07,064 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-17 22:47:07,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-17 22:47:07,066 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:07,067 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:07,067 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:07,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:07,067 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-17 22:47:07,069 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:07,070 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:07,070 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:07,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-17 22:47:07,072 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-17 22:47:07,084 INFO L204 LassoAnalysis]: Preferences: [2025-02-17 22:47:07,084 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-02-17 22:47:07,084 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-02-17 22:47:07,084 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-02-17 22:47:07,084 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-02-17 22:47:07,084 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:07,084 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-02-17 22:47:07,084 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-02-17 22:47:07,084 INFO L132 ssoRankerPreferences]: Filename of dumped script: m4_2.c.bpl_petrified1_Iteration4_Loop [2025-02-17 22:47:07,084 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-02-17 22:47:07,084 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2025-02-17 22:47:07,085 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-02-17 22:47:07,103 INFO L259 LassoAnalysis]: Preprocessing complete. [2025-02-17 22:47:07,103 INFO L365 LassoAnalysis]: Checking for nontermination... [2025-02-17 22:47:07,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:07,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:07,106 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:07,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2025-02-17 22:47:07,108 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-02-17 22:47:07,108 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-02-17 22:47:07,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2025-02-17 22:47:07,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:07,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:07,133 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:07,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2025-02-17 22:47:07,141 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-02-17 22:47:07,141 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-02-17 22:47:07,228 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-02-17 22:47:07,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2025-02-17 22:47:07,233 INFO L204 LassoAnalysis]: Preferences: [2025-02-17 22:47:07,233 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-02-17 22:47:07,233 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-02-17 22:47:07,233 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-02-17 22:47:07,233 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-02-17 22:47:07,233 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:07,233 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-02-17 22:47:07,233 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-02-17 22:47:07,233 INFO L132 ssoRankerPreferences]: Filename of dumped script: m4_2.c.bpl_petrified1_Iteration4_Loop [2025-02-17 22:47:07,233 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-02-17 22:47:07,233 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2025-02-17 22:47:07,234 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-02-17 22:47:07,258 INFO L259 LassoAnalysis]: Preprocessing complete. [2025-02-17 22:47:07,259 INFO L451 LassoAnalysis]: Using template 'affine'. [2025-02-17 22:47:07,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:07,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:07,262 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:07,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2025-02-17 22:47:07,264 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 [2025-02-17 22:47:07,275 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-02-17 22:47:07,275 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-02-17 22:47:07,275 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-02-17 22:47:07,275 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-02-17 22:47:07,275 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-02-17 22:47:07,276 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-02-17 22:47:07,276 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-02-17 22:47:07,278 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-02-17 22:47:07,282 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2025-02-17 22:47:07,282 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2025-02-17 22:47:07,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-02-17 22:47:07,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-02-17 22:47:07,284 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-02-17 22:47:07,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2025-02-17 22:47:07,290 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-02-17 22:47:07,290 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-02-17 22:47:07,291 INFO L474 LassoAnalysis]: Proved termination. [2025-02-17 22:47:07,291 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(y2, x2) = -1*y2 + 1*x2 Supporting invariants [] [2025-02-17 22:47:07,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Ended with exit code 0 [2025-02-17 22:47:07,304 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-02-17 22:47:07,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-17 22:47:07,321 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-17 22:47:07,324 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-17 22:47:07,324 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:07,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-17 22:47:07,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-17 22:47:07,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-17 22:47:07,338 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-02-17 22:47:07,339 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-02-17 22:47:07,339 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-17 22:47:07,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-17 22:47:07,339 WARN L254 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-17 22:47:07,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-17 22:47:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-17 22:47:07,352 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 [2025-02-17 22:47:07,352 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1454 states and 6443 transitions. cyclomatic complexity: 5279 Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2025-02-17 22:47:07,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2025-02-17 22:47:07,499 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1454 states and 6443 transitions. cyclomatic complexity: 5279. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 4290 states and 18372 transitions. Complement of second has 7 states. [2025-02-17 22:47:07,499 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 [2025-02-17 22:47:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2025-02-17 22:47:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2025-02-17 22:47:07,500 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 81 transitions. Stem has 7 letters. Loop has 2 letters. [2025-02-17 22:47:07,500 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2025-02-17 22:47:07,500 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 81 transitions. Stem has 9 letters. Loop has 2 letters. [2025-02-17 22:47:07,500 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2025-02-17 22:47:07,500 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 81 transitions. Stem has 7 letters. Loop has 4 letters. [2025-02-17 22:47:07,500 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2025-02-17 22:47:07,500 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 4290 states and 18372 transitions. [2025-02-17 22:47:07,551 INFO L131 ngComponentsAnalysis]: Automaton has 115 accepting balls. 268 [2025-02-17 22:47:07,580 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 4290 states to 2512 states and 10573 transitions. [2025-02-17 22:47:07,581 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 917 [2025-02-17 22:47:07,584 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 1048 [2025-02-17 22:47:07,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2512 states and 10573 transitions. [2025-02-17 22:47:07,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-02-17 22:47:07,584 INFO L218 hiAutomatonCegarLoop]: Abstraction has 2512 states and 10573 transitions. [2025-02-17 22:47:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states and 10573 transitions. [2025-02-17 22:47:07,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 1695. [2025-02-17 22:47:07,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1695 states have (on average 4.411209439528023) internal successors, (7477), 1694 states have internal predecessors, (7477), 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) [2025-02-17 22:47:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 7477 transitions. [2025-02-17 22:47:07,624 INFO L240 hiAutomatonCegarLoop]: Abstraction has 1695 states and 7477 transitions. [2025-02-17 22:47:07,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-17 22:47:07,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-17 22:47:07,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-17 22:47:07,625 INFO L87 Difference]: Start difference. First operand 1695 states and 7477 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-17 22:47:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-17 22:47:07,634 INFO L93 Difference]: Finished difference Result 373 states and 1341 transitions. [2025-02-17 22:47:07,634 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 373 states and 1341 transitions. [2025-02-17 22:47:07,636 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-02-17 22:47:07,636 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 373 states to 0 states and 0 transitions. [2025-02-17 22:47:07,636 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2025-02-17 22:47:07,636 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2025-02-17 22:47:07,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2025-02-17 22:47:07,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-02-17 22:47:07,636 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-17 22:47:07,638 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-17 22:47:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-17 22:47:07,641 INFO L432 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-17 22:47:07,641 INFO L338 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2025-02-17 22:47:07,641 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2025-02-17 22:47:07,641 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-02-17 22:47:07,641 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2025-02-17 22:47:07,650 INFO L201 PluginConnector]: Adding new model m4_2.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 17.02 10:47:07 BoogieIcfgContainer [2025-02-17 22:47:07,650 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2025-02-17 22:47:07,651 INFO L158 Benchmark]: Toolchain (without parser) took 4134.07ms. Allocated memory was 163.6MB in the beginning and 310.4MB in the end (delta: 146.8MB). Free memory was 89.2MB in the beginning and 147.8MB in the end (delta: -58.5MB). Peak memory consumption was 91.7MB. Max. memory is 8.0GB. [2025-02-17 22:47:07,651 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.88ms. Allocated memory is still 163.6MB. Free memory is still 90.2MB. There was no memory consumed. Max. memory is 8.0GB. [2025-02-17 22:47:07,651 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.75ms. Allocated memory is still 163.6MB. Free memory was 89.2MB in the beginning and 88.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 8.0GB. [2025-02-17 22:47:07,651 INFO L158 Benchmark]: Boogie Preprocessor took 10.33ms. Allocated memory is still 163.6MB. Free memory was 88.1MB in the beginning and 87.3MB in the end (delta: 808.2kB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-02-17 22:47:07,652 INFO L158 Benchmark]: RCFGBuilder took 194.57ms. Allocated memory is still 163.6MB. Free memory was 87.3MB in the beginning and 78.3MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2025-02-17 22:47:07,652 INFO L158 Benchmark]: BuchiAutomizer took 3909.64ms. Allocated memory was 163.6MB in the beginning and 310.4MB in the end (delta: 146.8MB). Free memory was 78.1MB in the beginning and 147.8MB in the end (delta: -69.6MB). Peak memory consumption was 79.1MB. Max. memory is 8.0GB. [2025-02-17 22:47:07,653 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 0.88ms. Allocated memory is still 163.6MB. Free memory is still 90.2MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 16.75ms. Allocated memory is still 163.6MB. Free memory was 89.2MB in the beginning and 88.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 10.33ms. Allocated memory is still 163.6MB. Free memory was 88.1MB in the beginning and 87.3MB in the end (delta: 808.2kB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 194.57ms. Allocated memory is still 163.6MB. Free memory was 87.3MB in the beginning and 78.3MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 3909.64ms. Allocated memory was 163.6MB in the beginning and 310.4MB in the end (delta: 146.8MB). Free memory was 78.1MB in the beginning and 147.8MB in the end (delta: -69.6MB). Peak memory consumption was 79.1MB. 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 6 terminating modules (2 trivial, 4 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -1 * x1 + z1 and consists of 4 locations. One deterministic module has affine ranking function z2 + -1 * x2 and consists of 4 locations. One deterministic module has affine ranking function -1 * y1 + x1 and consists of 4 locations. One deterministic module has affine ranking function -1 * y2 + x2 and consists of 4 locations. 2 modules have a trivial ranking function, the largest among these consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.8s and 5 iterations. TraceHistogramMax:1. Analysis of lassos took 1.2s. Construction of modules took 0.1s. Büchi inclusion checks took 0.8s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 5. Automata minimization 0.6s AutomataMinimizationTime, 5 MinimizatonAttempts, 5554 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.6s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [4, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 245 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 241 mSDsluCounter, 355 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 173 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 213 IncrementalHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 182 mSDtfsCounter, 213 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq150 hnf94 smp100 dnf100 smp100 tf111 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 47ms VariablesStem: 0 VariablesLoop: 3 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s InitialAbstractionConstructionTime: 0.0s InitialAbstraction: - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2025-02-17 22:47:07,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...